./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_4+newton_3_5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/combinations/gcd_4+newton_3_5.i -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 0c562931a6d05e325b28cce00e946abdf58c2b9fa526927c821e1aeeb79c8db9 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 02:13:21,595 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 02:13:21,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 02:13:21,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 02:13:21,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 02:13:21,659 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 02:13:21,659 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 02:13:21,661 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 02:13:21,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 02:13:21,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 02:13:21,677 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 02:13:21,678 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 02:13:21,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 02:13:21,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 02:13:21,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 02:13:21,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 02:13:21,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 02:13:21,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 02:13:21,688 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 02:13:21,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 02:13:21,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 02:13:21,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 02:13:21,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 02:13:21,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 02:13:21,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 02:13:21,699 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 02:13:21,699 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 02:13:21,700 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 02:13:21,701 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 02:13:21,701 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 02:13:21,702 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 02:13:21,702 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 02:13:21,703 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 02:13:21,704 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 02:13:21,705 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 02:13:21,705 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 02:13:21,706 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 02:13:21,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 02:13:21,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 02:13:21,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 02:13:21,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 02:13:21,708 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 02:13:21,728 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 02:13:21,731 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 02:13:21,732 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 02:13:21,732 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 02:13:21,732 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 02:13:21,733 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 02:13:21,733 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 02:13:21,733 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 02:13:21,733 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 02:13:21,733 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 02:13:21,734 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 02:13:21,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 02:13:21,734 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 02:13:21,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 02:13:21,735 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 02:13:21,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 02:13:21,735 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 02:13:21,735 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 02:13:21,735 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 02:13:21,735 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 02:13:21,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 02:13:21,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 02:13:21,736 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 02:13:21,736 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 02:13:21,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:13:21,736 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 02:13:21,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 02:13:21,737 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 02:13:21,737 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 02:13:21,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 02:13:21,737 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 02:13:21,737 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 02:13:21,737 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 02:13:21,738 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 02:13:21,738 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0c562931a6d05e325b28cce00e946abdf58c2b9fa526927c821e1aeeb79c8db9 [2021-12-16 02:13:21,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 02:13:21,935 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 02:13:21,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 02:13:21,938 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 02:13:21,939 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 02:13:21,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_4+newton_3_5.i [2021-12-16 02:13:22,005 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c7800cea/85115d4198204511860a221a9b2e6d8a/FLAG4c426763b [2021-12-16 02:13:22,391 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 02:13:22,391 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_3_5.i [2021-12-16 02:13:22,402 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c7800cea/85115d4198204511860a221a9b2e6d8a/FLAG4c426763b [2021-12-16 02:13:22,410 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c7800cea/85115d4198204511860a221a9b2e6d8a [2021-12-16 02:13:22,412 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 02:13:22,413 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 02:13:22,414 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 02:13:22,414 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 02:13:22,417 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 02:13:22,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:13:22" (1/1) ... [2021-12-16 02:13:22,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6768df1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:22, skipping insertion in model container [2021-12-16 02:13:22,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:13:22" (1/1) ... [2021-12-16 02:13:22,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 02:13:22,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 02:13:22,592 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_3_5.i[1224,1237] [2021-12-16 02:13:22,635 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_3_5.i[2848,2861] [2021-12-16 02:13:22,638 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:13:22,658 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 02:13:22,674 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_3_5.i[1224,1237] [2021-12-16 02:13:22,685 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_3_5.i[2848,2861] [2021-12-16 02:13:22,700 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:13:22,709 INFO L208 MainTranslator]: Completed translation [2021-12-16 02:13:22,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:22 WrapperNode [2021-12-16 02:13:22,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 02:13:22,711 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 02:13:22,711 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 02:13:22,711 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 02:13:22,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:22" (1/1) ... [2021-12-16 02:13:22,722 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:22" (1/1) ... [2021-12-16 02:13:22,745 INFO L137 Inliner]: procedures = 27, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 77 [2021-12-16 02:13:22,746 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 02:13:22,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 02:13:22,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 02:13:22,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 02:13:22,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:22" (1/1) ... [2021-12-16 02:13:22,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:22" (1/1) ... [2021-12-16 02:13:22,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:22" (1/1) ... [2021-12-16 02:13:22,770 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:22" (1/1) ... [2021-12-16 02:13:22,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:22" (1/1) ... [2021-12-16 02:13:22,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:22" (1/1) ... [2021-12-16 02:13:22,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:22" (1/1) ... [2021-12-16 02:13:22,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 02:13:22,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 02:13:22,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 02:13:22,785 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 02:13:22,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:22" (1/1) ... [2021-12-16 02:13:22,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:13:22,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:13:22,816 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 02:13:22,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 02:13:22,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 02:13:22,858 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-12-16 02:13:22,858 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-12-16 02:13:22,858 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-16 02:13:22,860 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-16 02:13:22,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 02:13:22,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 02:13:22,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 02:13:22,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-16 02:13:22,861 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-16 02:13:22,907 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 02:13:22,908 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 02:13:23,076 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 02:13:23,083 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 02:13:23,083 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-16 02:13:23,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:13:23 BoogieIcfgContainer [2021-12-16 02:13:23,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 02:13:23,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 02:13:23,087 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 02:13:23,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 02:13:23,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 02:13:22" (1/3) ... [2021-12-16 02:13:23,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c9c760b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:13:23, skipping insertion in model container [2021-12-16 02:13:23,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:22" (2/3) ... [2021-12-16 02:13:23,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c9c760b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:13:23, skipping insertion in model container [2021-12-16 02:13:23,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:13:23" (3/3) ... [2021-12-16 02:13:23,092 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_5.i [2021-12-16 02:13:23,096 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 02:13:23,096 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-16 02:13:23,139 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 02:13:23,144 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 02:13:23,144 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-16 02:13:23,157 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-16 02:13:23,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 02:13:23,160 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:23,160 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:23,160 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:23,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:23,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1780387208, now seen corresponding path program 1 times [2021-12-16 02:13:23,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:13:23,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493996473] [2021-12-16 02:13:23,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:23,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:13:23,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:13:23,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:23,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:13:23,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493996473] [2021-12-16 02:13:23,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493996473] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:13:23,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:13:23,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:13:23,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255534138] [2021-12-16 02:13:23,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:13:23,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:13:23,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:13:23,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:13:23,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:13:23,354 INFO L87 Difference]: Start difference. First operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:13:23,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:13:23,400 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2021-12-16 02:13:23,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:13:23,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-16 02:13:23,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:13:23,407 INFO L225 Difference]: With dead ends: 99 [2021-12-16 02:13:23,407 INFO L226 Difference]: Without dead ends: 46 [2021-12-16 02:13:23,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:13:23,411 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 13 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:13:23,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:13:23,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-16 02:13:23,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2021-12-16 02:13:23,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 02:13:23,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-12-16 02:13:23,438 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 11 [2021-12-16 02:13:23,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:13:23,438 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-12-16 02:13:23,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:13:23,439 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-12-16 02:13:23,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 02:13:23,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:23,440 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:23,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 02:13:23,440 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:23,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:23,441 INFO L85 PathProgramCache]: Analyzing trace with hash 413718792, now seen corresponding path program 1 times [2021-12-16 02:13:23,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:13:23,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359516422] [2021-12-16 02:13:23,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:23,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:13:23,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:13:23,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:23,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:13:23,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359516422] [2021-12-16 02:13:23,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359516422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:13:23,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:13:23,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:13:23,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461987789] [2021-12-16 02:13:23,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:13:23,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:13:23,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:13:23,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:13:23,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:13:23,466 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:13:23,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:13:23,482 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2021-12-16 02:13:23,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:13:23,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-16 02:13:23,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:13:23,484 INFO L225 Difference]: With dead ends: 55 [2021-12-16 02:13:23,484 INFO L226 Difference]: Without dead ends: 41 [2021-12-16 02:13:23,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:13:23,485 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:13:23,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 80 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:13:23,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-16 02:13:23,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-12-16 02:13:23,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 02:13:23,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-12-16 02:13:23,491 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 13 [2021-12-16 02:13:23,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:13:23,491 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-12-16 02:13:23,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:13:23,491 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-12-16 02:13:23,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-16 02:13:23,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:23,492 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:23,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 02:13:23,493 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:23,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:23,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1714945339, now seen corresponding path program 1 times [2021-12-16 02:13:23,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:13:23,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179650033] [2021-12-16 02:13:23,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:23,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:13:23,508 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 02:13:23,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020913450] [2021-12-16 02:13:23,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:23,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:13:23,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:13:23,510 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:13:23,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 02:13:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:13:23,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 02:13:23,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:13:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:23,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:13:23,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:13:23,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179650033] [2021-12-16 02:13:23,624 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 02:13:23,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020913450] [2021-12-16 02:13:23,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020913450] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:13:23,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:13:23,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:13:23,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054781996] [2021-12-16 02:13:23,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:13:23,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:13:23,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:13:23,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:13:23,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:13:23,627 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:13:23,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:13:23,638 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2021-12-16 02:13:23,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:13:23,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-16 02:13:23,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:13:23,640 INFO L225 Difference]: With dead ends: 56 [2021-12-16 02:13:23,640 INFO L226 Difference]: Without dead ends: 43 [2021-12-16 02:13:23,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:13:23,641 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:13:23,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:13:23,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-16 02:13:23,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-16 02:13:23,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 02:13:23,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2021-12-16 02:13:23,646 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 15 [2021-12-16 02:13:23,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:13:23,646 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-12-16 02:13:23,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:13:23,647 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2021-12-16 02:13:23,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 02:13:23,647 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:23,647 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:23,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 02:13:23,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:13:23,867 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:23,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:23,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1030187394, now seen corresponding path program 1 times [2021-12-16 02:13:23,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:13:23,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458568082] [2021-12-16 02:13:23,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:23,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:13:23,881 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 02:13:23,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743951869] [2021-12-16 02:13:23,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:23,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:13:23,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:13:23,884 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:13:23,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 02:13:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:13:23,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 02:13:23,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:13:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:24,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:13:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:24,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:13:24,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458568082] [2021-12-16 02:13:24,104 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 02:13:24,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743951869] [2021-12-16 02:13:24,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743951869] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:13:24,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 02:13:24,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-16 02:13:24,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794093824] [2021-12-16 02:13:24,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 02:13:24,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:13:24,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:13:24,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:13:24,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:13:24,114 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:13:24,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:13:24,169 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2021-12-16 02:13:24,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 02:13:24,170 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-16 02:13:24,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:13:24,171 INFO L225 Difference]: With dead ends: 60 [2021-12-16 02:13:24,172 INFO L226 Difference]: Without dead ends: 47 [2021-12-16 02:13:24,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:13:24,175 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:13:24,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 189 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:13:24,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-16 02:13:24,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-16 02:13:24,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 02:13:24,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-16 02:13:24,184 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 17 [2021-12-16 02:13:24,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:13:24,185 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-16 02:13:24,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:13:24,185 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-16 02:13:24,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-16 02:13:24,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:24,186 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:24,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 02:13:24,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-16 02:13:24,389 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:24,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:24,390 INFO L85 PathProgramCache]: Analyzing trace with hash -626272964, now seen corresponding path program 2 times [2021-12-16 02:13:24,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:13:24,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531720213] [2021-12-16 02:13:24,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:24,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:13:24,400 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 02:13:24,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696162194] [2021-12-16 02:13:24,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 02:13:24,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:13:24,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:13:24,424 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:13:24,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 02:13:24,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 02:13:24,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:13:24,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 02:13:24,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:13:24,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:24,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:13:24,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:24,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:13:24,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531720213] [2021-12-16 02:13:24,635 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 02:13:24,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696162194] [2021-12-16 02:13:24,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696162194] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:13:24,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 02:13:24,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-16 02:13:24,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237374010] [2021-12-16 02:13:24,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 02:13:24,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 02:13:24,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:13:24,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 02:13:24,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-16 02:13:24,639 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:13:24,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:13:24,710 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2021-12-16 02:13:24,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 02:13:24,711 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-16 02:13:24,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:13:24,712 INFO L225 Difference]: With dead ends: 68 [2021-12-16 02:13:24,712 INFO L226 Difference]: Without dead ends: 53 [2021-12-16 02:13:24,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-12-16 02:13:24,713 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 12 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:13:24,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 263 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:13:24,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-16 02:13:24,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-16 02:13:24,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 02:13:24,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-12-16 02:13:24,718 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 21 [2021-12-16 02:13:24,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:13:24,718 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-12-16 02:13:24,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:13:24,718 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-12-16 02:13:24,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-16 02:13:24,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:24,719 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:24,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-16 02:13:24,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:13:24,936 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:24,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:24,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1120707465, now seen corresponding path program 3 times [2021-12-16 02:13:24,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:13:24,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027112001] [2021-12-16 02:13:24,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:24,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:13:24,947 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 02:13:24,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065745134] [2021-12-16 02:13:24,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 02:13:24,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:13:24,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:13:24,960 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:13:25,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 02:13:25,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-16 02:13:25,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:13:25,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 02:13:25,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:13:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 02:13:25,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:13:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 02:13:25,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:13:25,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027112001] [2021-12-16 02:13:25,676 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 02:13:25,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065745134] [2021-12-16 02:13:25,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065745134] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:13:25,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 02:13:25,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-12-16 02:13:25,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062566614] [2021-12-16 02:13:25,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 02:13:25,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 02:13:25,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:13:25,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 02:13:25,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-12-16 02:13:25,679 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:13:26,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:13:26,226 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2021-12-16 02:13:26,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 02:13:26,227 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-16 02:13:26,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:13:26,229 INFO L225 Difference]: With dead ends: 73 [2021-12-16 02:13:26,229 INFO L226 Difference]: Without dead ends: 70 [2021-12-16 02:13:26,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-12-16 02:13:26,232 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 43 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 02:13:26,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 396 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 201 Invalid, 0 Unknown, 21 Unchecked, 0.2s Time] [2021-12-16 02:13:26,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-16 02:13:26,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2021-12-16 02:13:26,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 49 states have (on average 1.183673469387755) internal successors, (58), 53 states have internal predecessors, (58), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-16 02:13:26,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2021-12-16 02:13:26,256 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 23 [2021-12-16 02:13:26,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:13:26,257 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2021-12-16 02:13:26,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:13:26,259 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2021-12-16 02:13:26,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 02:13:26,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:26,260 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:26,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-16 02:13:26,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:13:26,475 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:26,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:26,476 INFO L85 PathProgramCache]: Analyzing trace with hash 469106930, now seen corresponding path program 4 times [2021-12-16 02:13:26,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:13:26,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435115503] [2021-12-16 02:13:26,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:26,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:13:26,485 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 02:13:26,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [119221235] [2021-12-16 02:13:26,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 02:13:26,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:13:26,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:13:26,491 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:13:26,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 02:13:26,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 02:13:26,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:13:26,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 02:13:26,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:13:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:26,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:13:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:26,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:13:26,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435115503] [2021-12-16 02:13:26,755 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 02:13:26,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119221235] [2021-12-16 02:13:26,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119221235] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:13:26,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 02:13:26,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-16 02:13:26,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731445526] [2021-12-16 02:13:26,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 02:13:26,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 02:13:26,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:13:26,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 02:13:26,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-16 02:13:26,759 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:13:26,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:13:26,938 INFO L93 Difference]: Finished difference Result 96 states and 125 transitions. [2021-12-16 02:13:26,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 02:13:26,940 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-16 02:13:26,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:13:26,941 INFO L225 Difference]: With dead ends: 96 [2021-12-16 02:13:26,941 INFO L226 Difference]: Without dead ends: 83 [2021-12-16 02:13:26,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2021-12-16 02:13:26,942 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 61 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 02:13:26,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 275 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 02:13:26,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-16 02:13:26,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2021-12-16 02:13:26,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 60 states have (on average 1.25) internal successors, (75), 64 states have internal predecessors, (75), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-16 02:13:26,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 97 transitions. [2021-12-16 02:13:26,947 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 97 transitions. Word has length 25 [2021-12-16 02:13:26,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:13:26,948 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 97 transitions. [2021-12-16 02:13:26,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:13:26,948 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 97 transitions. [2021-12-16 02:13:26,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 02:13:26,948 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:26,948 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:26,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 02:13:27,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:13:27,167 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:27,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:27,168 INFO L85 PathProgramCache]: Analyzing trace with hash -985782289, now seen corresponding path program 5 times [2021-12-16 02:13:27,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:13:27,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170288035] [2021-12-16 02:13:27,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:27,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:13:27,176 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 02:13:27,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277150494] [2021-12-16 02:13:27,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 02:13:27,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:13:27,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:13:27,178 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:13:27,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 02:13:27,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-16 02:13:27,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:13:27,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 02:13:27,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:13:27,420 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:27,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:13:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:27,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:13:27,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170288035] [2021-12-16 02:13:27,710 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 02:13:27,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277150494] [2021-12-16 02:13:27,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277150494] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:13:27,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 02:13:27,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-16 02:13:27,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560761163] [2021-12-16 02:13:27,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 02:13:27,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 02:13:27,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:13:27,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 02:13:27,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-12-16 02:13:27,713 INFO L87 Difference]: Start difference. First operand 78 states and 97 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:13:27,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:13:27,769 INFO L93 Difference]: Finished difference Result 91 states and 113 transitions. [2021-12-16 02:13:27,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:13:27,770 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-16 02:13:27,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:13:27,770 INFO L225 Difference]: With dead ends: 91 [2021-12-16 02:13:27,771 INFO L226 Difference]: Without dead ends: 74 [2021-12-16 02:13:27,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-12-16 02:13:27,772 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 10 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:13:27,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 374 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 81 Invalid, 0 Unknown, 32 Unchecked, 0.0s Time] [2021-12-16 02:13:27,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-16 02:13:27,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-12-16 02:13:27,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 60 states have internal predecessors, (69), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-16 02:13:27,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2021-12-16 02:13:27,777 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 27 [2021-12-16 02:13:27,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:13:27,778 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2021-12-16 02:13:27,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:13:27,778 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2021-12-16 02:13:27,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 02:13:27,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:27,779 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:27,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 02:13:27,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:13:27,996 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:27,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:27,996 INFO L85 PathProgramCache]: Analyzing trace with hash 474756785, now seen corresponding path program 6 times [2021-12-16 02:13:27,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:13:27,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430258943] [2021-12-16 02:13:27,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:27,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:13:28,004 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 02:13:28,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775441094] [2021-12-16 02:13:28,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 02:13:28,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:13:28,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:13:28,005 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:13:28,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 02:13:28,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-16 02:13:28,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:13:28,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 02:13:28,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:13:28,082 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-16 02:13:28,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:13:28,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:13:28,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430258943] [2021-12-16 02:13:28,083 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 02:13:28,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775441094] [2021-12-16 02:13:28,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775441094] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:13:28,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:13:28,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:13:28,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103379813] [2021-12-16 02:13:28,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:13:28,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:13:28,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:13:28,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:13:28,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:13:28,084 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:13:28,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:13:28,092 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2021-12-16 02:13:28,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:13:28,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-16 02:13:28,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:13:28,099 INFO L225 Difference]: With dead ends: 90 [2021-12-16 02:13:28,099 INFO L226 Difference]: Without dead ends: 72 [2021-12-16 02:13:28,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:13:28,100 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 3 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:13:28,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 80 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:13:28,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-16 02:13:28,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-12-16 02:13:28,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 58 states have internal predecessors, (64), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-16 02:13:28,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2021-12-16 02:13:28,105 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 27 [2021-12-16 02:13:28,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:13:28,105 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2021-12-16 02:13:28,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:13:28,105 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2021-12-16 02:13:28,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-16 02:13:28,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:28,106 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:28,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 02:13:28,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:13:28,324 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:28,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:28,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1781630816, now seen corresponding path program 1 times [2021-12-16 02:13:28,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:13:28,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610999998] [2021-12-16 02:13:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:28,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:13:28,332 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 02:13:28,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1310658930] [2021-12-16 02:13:28,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:28,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:13:28,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:13:28,334 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:13:28,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 02:13:28,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:13:28,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-16 02:13:28,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:13:28,543 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 02:13:28,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:13:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 02:13:29,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:13:29,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610999998] [2021-12-16 02:13:29,623 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 02:13:29,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310658930] [2021-12-16 02:13:29,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310658930] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:13:29,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 02:13:29,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-12-16 02:13:29,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464970627] [2021-12-16 02:13:29,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 02:13:29,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 02:13:29,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:13:29,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 02:13:29,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-12-16 02:13:29,624 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 02:13:30,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:13:30,112 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2021-12-16 02:13:30,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 02:13:30,115 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-12-16 02:13:30,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:13:30,115 INFO L225 Difference]: With dead ends: 78 [2021-12-16 02:13:30,115 INFO L226 Difference]: Without dead ends: 64 [2021-12-16 02:13:30,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-12-16 02:13:30,116 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 17 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 02:13:30,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 377 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 02:13:30,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-16 02:13:30,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-12-16 02:13:30,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.16) internal successors, (58), 52 states have internal predecessors, (58), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 02:13:30,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2021-12-16 02:13:30,119 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 28 [2021-12-16 02:13:30,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:13:30,119 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2021-12-16 02:13:30,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 02:13:30,120 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2021-12-16 02:13:30,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-16 02:13:30,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:30,120 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:30,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-16 02:13:30,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-16 02:13:30,321 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:30,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:30,321 INFO L85 PathProgramCache]: Analyzing trace with hash -21288017, now seen corresponding path program 1 times [2021-12-16 02:13:30,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:13:30,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588890249] [2021-12-16 02:13:30,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:30,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:13:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 02:13:30,366 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 02:13:30,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 02:13:30,392 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 02:13:30,392 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-16 02:13:30,393 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-16 02:13:30,394 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-16 02:13:30,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 02:13:30,397 INFO L732 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1, 1, 1] [2021-12-16 02:13:30,398 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-16 02:13:30,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 02:13:30 BoogieIcfgContainer [2021-12-16 02:13:30,414 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-16 02:13:30,415 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-16 02:13:30,415 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-16 02:13:30,415 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-16 02:13:30,415 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:13:23" (3/4) ... [2021-12-16 02:13:30,422 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-16 02:13:30,423 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-16 02:13:30,423 INFO L158 Benchmark]: Toolchain (without parser) took 8010.07ms. Allocated memory was 79.7MB in the beginning and 123.7MB in the end (delta: 44.0MB). Free memory was 47.4MB in the beginning and 97.1MB in the end (delta: -49.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 02:13:30,423 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 79.7MB. Free memory is still 39.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 02:13:30,423 INFO L158 Benchmark]: CACSL2BoogieTranslator took 296.42ms. Allocated memory was 79.7MB in the beginning and 102.8MB in the end (delta: 23.1MB). Free memory was 47.1MB in the beginning and 77.9MB in the end (delta: -30.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-16 02:13:30,424 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.97ms. Allocated memory is still 102.8MB. Free memory was 77.9MB in the beginning and 75.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 02:13:30,424 INFO L158 Benchmark]: Boogie Preprocessor took 37.67ms. Allocated memory is still 102.8MB. Free memory was 75.8MB in the beginning and 74.7MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 02:13:30,424 INFO L158 Benchmark]: RCFGBuilder took 300.71ms. Allocated memory is still 102.8MB. Free memory was 74.7MB in the beginning and 63.7MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-16 02:13:30,424 INFO L158 Benchmark]: TraceAbstraction took 7327.79ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 63.2MB in the beginning and 97.1MB in the end (delta: -33.9MB). Peak memory consumption was 57.9MB. Max. memory is 16.1GB. [2021-12-16 02:13:30,425 INFO L158 Benchmark]: Witness Printer took 7.94ms. Allocated memory is still 123.7MB. Free memory is still 97.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 02:13:30,426 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 79.7MB. Free memory is still 39.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 296.42ms. Allocated memory was 79.7MB in the beginning and 102.8MB in the end (delta: 23.1MB). Free memory was 47.1MB in the beginning and 77.9MB in the end (delta: -30.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.97ms. Allocated memory is still 102.8MB. Free memory was 77.9MB in the beginning and 75.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.67ms. Allocated memory is still 102.8MB. Free memory was 75.8MB in the beginning and 74.7MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 300.71ms. Allocated memory is still 102.8MB. Free memory was 74.7MB in the beginning and 63.7MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 7327.79ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 63.2MB in the beginning and 97.1MB in the end (delta: -33.9MB). Peak memory consumption was 57.9MB. Max. memory is 16.1GB. * Witness Printer took 7.94ms. Allocated memory is still 123.7MB. Free memory is still 97.1MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 109]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 98, overapproximation of someBinaryDOUBLEComparisonOperation at line 108, overapproximation of someBinaryArithmeticFLOAToperation at line 104. Possible FailurePath: [L115] COND FALSE !(__VERIFIER_nondet_int()) [L118] CALL main2() [L97] float IN = __VERIFIER_nondet_float(); [L98] CALL assume_abort_if_not(IN > -1.0f && IN < 1.0f) [L82] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L98] RET assume_abort_if_not(IN > -1.0f && IN < 1.0f) [L100] CALL, EXPR f(IN) VAL [\old(x)=57] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=57, x=57] [L100] RET, EXPR f(IN) VAL [f(IN)=49, IN=57] [L100] CALL, EXPR fp(IN) VAL [\old(x)=57] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=57, x=57] [L100] RET, EXPR fp(IN) VAL [f(IN)=49, fp(IN)=50, IN=57] [L100] float x = IN - f(IN)/fp(IN); [L102] CALL, EXPR f(x) VAL [\old(x)=52] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=52, x=52] [L102] RET, EXPR f(x) VAL [f(x)=51, IN=57, x=52] [L102] CALL, EXPR fp(x) VAL [\old(x)=52] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=52, x=52] [L102] RET, EXPR fp(x) VAL [f(x)=51, fp(x)=53, IN=57, x=52] [L102] x = x - f(x)/fp(x) [L104] CALL, EXPR f(x) VAL [\old(x)=55] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=55, x=55] [L104] RET, EXPR f(x) VAL [f(x)=54, IN=57, x=55] [L104] CALL, EXPR fp(x) VAL [\old(x)=55] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=55, x=55] [L104] RET, EXPR fp(x) VAL [f(x)=54, fp(x)=56, IN=57, x=55] [L104] x = x - f(x)/fp(x) [L108] COND TRUE !(x < 0.1) VAL [IN=57] [L109] reach_error() VAL [IN=57] - UnprovableResult [Line: 27]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 46 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 7.3s, OverallIterations: 11, TraceHistogramMax: 7, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 170 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 166 mSDsluCounter, 2212 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 53 IncrementalHoareTripleChecker+Unchecked, 1793 mSDsCounter, 116 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 687 IncrementalHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 116 mSolverCounterUnsat, 419 mSDtfsCounter, 687 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 341 GetRequests, 240 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=7, InterpolantAutomatonStates: 75, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 15 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 241 NumberOfCodeBlocks, 231 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 332 ConstructedInterpolants, 21 QuantifiedInterpolants, 2133 SizeOfPredicates, 39 NumberOfNonLiveVariables, 617 ConjunctsInSsa, 101 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 128/364 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-16 02:13:30,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/combinations/gcd_4+newton_3_5.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 0c562931a6d05e325b28cce00e946abdf58c2b9fa526927c821e1aeeb79c8db9 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 02:13:32,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 02:13:32,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 02:13:32,240 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 02:13:32,240 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 02:13:32,243 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 02:13:32,244 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 02:13:32,247 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 02:13:32,249 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 02:13:32,252 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 02:13:32,252 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 02:13:32,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 02:13:32,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 02:13:32,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 02:13:32,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 02:13:32,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 02:13:32,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 02:13:32,263 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 02:13:32,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 02:13:32,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 02:13:32,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 02:13:32,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 02:13:32,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 02:13:32,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 02:13:32,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 02:13:32,276 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 02:13:32,276 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 02:13:32,277 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 02:13:32,278 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 02:13:32,278 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 02:13:32,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 02:13:32,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 02:13:32,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 02:13:32,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 02:13:32,282 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 02:13:32,282 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 02:13:32,282 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 02:13:32,282 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 02:13:32,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 02:13:32,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 02:13:32,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 02:13:32,285 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-16 02:13:32,310 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 02:13:32,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 02:13:32,311 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 02:13:32,311 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 02:13:32,312 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 02:13:32,312 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 02:13:32,313 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 02:13:32,313 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 02:13:32,313 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 02:13:32,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 02:13:32,314 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 02:13:32,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 02:13:32,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 02:13:32,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 02:13:32,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 02:13:32,315 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 02:13:32,315 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 02:13:32,315 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-16 02:13:32,315 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-16 02:13:32,316 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 02:13:32,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 02:13:32,316 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 02:13:32,316 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 02:13:32,316 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 02:13:32,316 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 02:13:32,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 02:13:32,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:13:32,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 02:13:32,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 02:13:32,332 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 02:13:32,332 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-16 02:13:32,332 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-16 02:13:32,332 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 02:13:32,333 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 02:13:32,333 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 02:13:32,333 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 02:13:32,333 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-16 02:13:32,333 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0c562931a6d05e325b28cce00e946abdf58c2b9fa526927c821e1aeeb79c8db9 [2021-12-16 02:13:32,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 02:13:32,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 02:13:32,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 02:13:32,614 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 02:13:32,614 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 02:13:32,615 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_4+newton_3_5.i [2021-12-16 02:13:32,650 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fc9724a3/296e49719d6742b3bf90ba2ce166d6f6/FLAGac54f96a3 [2021-12-16 02:13:32,956 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 02:13:32,957 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_3_5.i [2021-12-16 02:13:32,963 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fc9724a3/296e49719d6742b3bf90ba2ce166d6f6/FLAGac54f96a3 [2021-12-16 02:13:33,384 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fc9724a3/296e49719d6742b3bf90ba2ce166d6f6 [2021-12-16 02:13:33,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 02:13:33,388 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 02:13:33,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 02:13:33,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 02:13:33,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 02:13:33,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:13:33" (1/1) ... [2021-12-16 02:13:33,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e900c8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:33, skipping insertion in model container [2021-12-16 02:13:33,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:13:33" (1/1) ... [2021-12-16 02:13:33,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 02:13:33,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 02:13:33,514 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_3_5.i[1224,1237] [2021-12-16 02:13:33,530 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_3_5.i[2848,2861] [2021-12-16 02:13:33,531 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:13:33,565 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 02:13:33,590 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_3_5.i[1224,1237] [2021-12-16 02:13:33,602 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_3_5.i[2848,2861] [2021-12-16 02:13:33,602 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:13:33,613 INFO L208 MainTranslator]: Completed translation [2021-12-16 02:13:33,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:33 WrapperNode [2021-12-16 02:13:33,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 02:13:33,614 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 02:13:33,614 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 02:13:33,614 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 02:13:33,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:33" (1/1) ... [2021-12-16 02:13:33,625 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:33" (1/1) ... [2021-12-16 02:13:33,639 INFO L137 Inliner]: procedures = 28, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 74 [2021-12-16 02:13:33,639 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 02:13:33,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 02:13:33,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 02:13:33,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 02:13:33,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:33" (1/1) ... [2021-12-16 02:13:33,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:33" (1/1) ... [2021-12-16 02:13:33,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:33" (1/1) ... [2021-12-16 02:13:33,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:33" (1/1) ... [2021-12-16 02:13:33,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:33" (1/1) ... [2021-12-16 02:13:33,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:33" (1/1) ... [2021-12-16 02:13:33,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:33" (1/1) ... [2021-12-16 02:13:33,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 02:13:33,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 02:13:33,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 02:13:33,660 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 02:13:33,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:33" (1/1) ... [2021-12-16 02:13:33,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:13:33,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:13:33,694 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 02:13:33,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 02:13:33,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 02:13:33,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-16 02:13:33,733 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-12-16 02:13:33,734 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-12-16 02:13:33,734 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-16 02:13:33,734 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-16 02:13:33,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 02:13:33,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 02:13:33,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-16 02:13:33,734 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-16 02:13:33,806 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 02:13:33,807 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 02:13:44,786 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 02:13:44,790 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 02:13:44,798 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-16 02:13:44,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:13:44 BoogieIcfgContainer [2021-12-16 02:13:44,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 02:13:44,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 02:13:44,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 02:13:44,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 02:13:44,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 02:13:33" (1/3) ... [2021-12-16 02:13:44,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb88389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:13:44, skipping insertion in model container [2021-12-16 02:13:44,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:13:33" (2/3) ... [2021-12-16 02:13:44,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb88389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:13:44, skipping insertion in model container [2021-12-16 02:13:44,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:13:44" (3/3) ... [2021-12-16 02:13:44,805 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_5.i [2021-12-16 02:13:44,808 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 02:13:44,808 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-16 02:13:44,851 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 02:13:44,857 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 02:13:44,858 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-16 02:13:44,880 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-16 02:13:44,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 02:13:44,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:44,885 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:44,885 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:44,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:44,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1780387208, now seen corresponding path program 1 times [2021-12-16 02:13:44,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 02:13:44,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1680467228] [2021-12-16 02:13:44,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:44,898 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 02:13:44,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 02:13:44,900 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 02:13:44,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-16 02:13:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:13:44,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 02:13:44,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:13:45,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:45,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:13:45,187 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 02:13:45,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1680467228] [2021-12-16 02:13:45,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1680467228] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:13:45,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:13:45,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:13:45,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536257487] [2021-12-16 02:13:45,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:13:45,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:13:45,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 02:13:45,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:13:45,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:13:45,209 INFO L87 Difference]: Start difference. First operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:13:45,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:13:45,309 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2021-12-16 02:13:45,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:13:45,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-16 02:13:45,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:13:45,317 INFO L225 Difference]: With dead ends: 99 [2021-12-16 02:13:45,317 INFO L226 Difference]: Without dead ends: 46 [2021-12-16 02:13:45,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:13:45,323 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 13 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 02:13:45,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 02:13:45,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-16 02:13:45,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2021-12-16 02:13:45,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 02:13:45,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-12-16 02:13:45,352 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 11 [2021-12-16 02:13:45,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:13:45,352 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-12-16 02:13:45,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:13:45,352 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-12-16 02:13:45,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 02:13:45,353 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:45,353 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:45,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-16 02:13:45,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 02:13:45,565 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:45,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:45,566 INFO L85 PathProgramCache]: Analyzing trace with hash 413718792, now seen corresponding path program 1 times [2021-12-16 02:13:45,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 02:13:45,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288125627] [2021-12-16 02:13:45,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:45,567 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 02:13:45,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 02:13:45,568 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 02:13:45,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-16 02:13:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:13:45,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 02:13:45,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:13:45,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:45,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:13:45,763 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 02:13:45,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288125627] [2021-12-16 02:13:45,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [288125627] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:13:45,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:13:45,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:13:45,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875535438] [2021-12-16 02:13:45,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:13:45,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:13:45,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 02:13:45,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:13:45,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:13:45,766 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:13:45,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:13:45,837 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2021-12-16 02:13:45,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:13:45,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-16 02:13:45,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:13:45,839 INFO L225 Difference]: With dead ends: 55 [2021-12-16 02:13:45,839 INFO L226 Difference]: Without dead ends: 41 [2021-12-16 02:13:45,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:13:45,840 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 02:13:45,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 80 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 02:13:45,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-16 02:13:45,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-12-16 02:13:45,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 02:13:45,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-12-16 02:13:45,845 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 13 [2021-12-16 02:13:45,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:13:45,845 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-12-16 02:13:45,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:13:45,846 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-12-16 02:13:45,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-16 02:13:45,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:45,846 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:45,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-16 02:13:46,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 02:13:46,055 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:46,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:46,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1714945339, now seen corresponding path program 1 times [2021-12-16 02:13:46,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 02:13:46,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816996503] [2021-12-16 02:13:46,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:46,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 02:13:46,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 02:13:46,059 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 02:13:46,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-16 02:13:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:13:46,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 02:13:46,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:13:46,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:46,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:13:46,433 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 02:13:46,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816996503] [2021-12-16 02:13:46,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [816996503] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:13:46,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:13:46,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:13:46,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299966640] [2021-12-16 02:13:46,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:13:46,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:13:46,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 02:13:46,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:13:46,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:13:46,435 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:13:46,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:13:46,524 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2021-12-16 02:13:46,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:13:46,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-16 02:13:46,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:13:46,526 INFO L225 Difference]: With dead ends: 56 [2021-12-16 02:13:46,526 INFO L226 Difference]: Without dead ends: 43 [2021-12-16 02:13:46,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:13:46,527 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 02:13:46,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 02:13:46,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-16 02:13:46,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-16 02:13:46,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 02:13:46,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2021-12-16 02:13:46,531 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 15 [2021-12-16 02:13:46,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:13:46,532 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-12-16 02:13:46,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:13:46,532 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2021-12-16 02:13:46,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 02:13:46,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:46,532 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:46,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-16 02:13:46,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 02:13:46,741 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:46,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:46,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1030187394, now seen corresponding path program 1 times [2021-12-16 02:13:46,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 02:13:46,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1854969801] [2021-12-16 02:13:46,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:13:46,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 02:13:46,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 02:13:46,744 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 02:13:46,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-16 02:13:46,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:13:46,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 02:13:46,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:13:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:47,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:13:47,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:13:47,579 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 02:13:47,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1854969801] [2021-12-16 02:13:47,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1854969801] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:13:47,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 02:13:47,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-16 02:13:47,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571721660] [2021-12-16 02:13:47,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 02:13:47,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:13:47,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 02:13:47,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:13:47,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:13:47,580 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:13:47,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:13:47,805 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2021-12-16 02:13:47,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 02:13:47,806 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-16 02:13:47,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:13:47,807 INFO L225 Difference]: With dead ends: 60 [2021-12-16 02:13:47,807 INFO L226 Difference]: Without dead ends: 47 [2021-12-16 02:13:47,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:13:47,808 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 02:13:47,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 115 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 02:13:47,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-16 02:13:47,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-16 02:13:47,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 02:13:47,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-16 02:13:47,813 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 17 [2021-12-16 02:13:47,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:13:47,813 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-16 02:13:47,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:13:47,813 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-16 02:13:47,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-16 02:13:47,813 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:13:47,814 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:13:47,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-16 02:13:48,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 02:13:48,023 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:13:48,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:13:48,028 INFO L85 PathProgramCache]: Analyzing trace with hash -626272964, now seen corresponding path program 2 times [2021-12-16 02:13:48,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 02:13:48,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1753642659] [2021-12-16 02:13:48,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 02:13:48,029 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 02:13:48,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 02:13:48,034 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 02:13:48,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-16 02:13:48,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 02:13:48,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:13:48,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 02:13:48,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:13:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 02:13:49,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:13:58,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 02:13:58,710 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 02:13:58,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1753642659] [2021-12-16 02:13:58,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1753642659] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:13:58,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 02:13:58,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-16 02:13:58,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034292208] [2021-12-16 02:13:58,710 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 02:13:58,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 02:13:58,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 02:13:58,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 02:13:58,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-12-16 02:13:58,711 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:14:25,729 WARN L227 SmtUtils]: Spent 9.28s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)