./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_4+newton_3_7.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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_7.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 87bc0d62bd0ac2c8f0b3bcd924815b04302ef88419a4b535524b284cb471b329 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 15:59:33,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 15:59:33,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 15:59:33,997 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 15:59:33,998 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 15:59:34,001 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 15:59:34,002 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 15:59:34,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 15:59:34,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 15:59:34,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 15:59:34,011 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 15:59:34,012 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 15:59:34,012 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 15:59:34,014 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 15:59:34,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 15:59:34,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 15:59:34,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 15:59:34,021 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 15:59:34,022 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 15:59:34,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 15:59:34,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 15:59:34,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 15:59:34,031 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 15:59:34,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 15:59:34,037 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 15:59:34,037 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 15:59:34,038 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 15:59:34,039 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 15:59:34,039 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 15:59:34,040 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 15:59:34,040 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 15:59:34,041 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 15:59:34,042 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 15:59:34,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 15:59:34,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 15:59:34,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 15:59:34,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 15:59:34,045 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 15:59:34,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 15:59:34,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 15:59:34,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 15:59:34,048 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 15:59:34,081 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 15:59:34,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 15:59:34,082 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 15:59:34,083 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 15:59:34,084 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 15:59:34,084 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 15:59:34,084 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 15:59:34,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 15:59:34,085 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 15:59:34,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 15:59:34,086 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 15:59:34,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 15:59:34,086 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 15:59:34,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 15:59:34,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 15:59:34,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 15:59:34,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 15:59:34,087 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 15:59:34,087 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 15:59:34,087 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 15:59:34,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 15:59:34,088 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 15:59:34,088 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 15:59:34,088 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 15:59:34,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:59:34,089 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 15:59:34,089 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 15:59:34,090 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 15:59:34,090 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 15:59:34,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 15:59:34,090 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 15:59:34,091 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 15:59:34,091 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 15:59:34,091 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 15:59:34,091 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87bc0d62bd0ac2c8f0b3bcd924815b04302ef88419a4b535524b284cb471b329 [2021-12-14 15:59:34,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 15:59:34,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 15:59:34,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 15:59:34,405 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 15:59:34,407 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 15:59:34,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_4+newton_3_7.i [2021-12-14 15:59:34,468 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbcab5ad0/aa87f34182384eb6852afb4604f64e52/FLAG7d2f8aa0e [2021-12-14 15:59:34,857 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 15:59:34,860 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_3_7.i [2021-12-14 15:59:34,871 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbcab5ad0/aa87f34182384eb6852afb4604f64e52/FLAG7d2f8aa0e [2021-12-14 15:59:35,272 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbcab5ad0/aa87f34182384eb6852afb4604f64e52 [2021-12-14 15:59:35,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 15:59:35,275 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 15:59:35,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 15:59:35,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 15:59:35,279 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 15:59:35,280 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:59:35" (1/1) ... [2021-12-14 15:59:35,280 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@261aa921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:35, skipping insertion in model container [2021-12-14 15:59:35,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:59:35" (1/1) ... [2021-12-14 15:59:35,286 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 15:59:35,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 15:59:35,430 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_7.i[1224,1237] [2021-12-14 15:59:35,450 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_7.i[2848,2861] [2021-12-14 15:59:35,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:59:35,457 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 15:59:35,467 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_7.i[1224,1237] [2021-12-14 15:59:35,476 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_7.i[2848,2861] [2021-12-14 15:59:35,478 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:59:35,488 INFO L208 MainTranslator]: Completed translation [2021-12-14 15:59:35,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:35 WrapperNode [2021-12-14 15:59:35,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 15:59:35,489 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 15:59:35,489 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 15:59:35,490 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 15:59:35,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:35" (1/1) ... [2021-12-14 15:59:35,501 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:35" (1/1) ... [2021-12-14 15:59:35,516 INFO L137 Inliner]: procedures = 27, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 77 [2021-12-14 15:59:35,517 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 15:59:35,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 15:59:35,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 15:59:35,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 15:59:35,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:35" (1/1) ... [2021-12-14 15:59:35,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:35" (1/1) ... [2021-12-14 15:59:35,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:35" (1/1) ... [2021-12-14 15:59:35,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:35" (1/1) ... [2021-12-14 15:59:35,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:35" (1/1) ... [2021-12-14 15:59:35,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:35" (1/1) ... [2021-12-14 15:59:35,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:35" (1/1) ... [2021-12-14 15:59:35,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 15:59:35,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 15:59:35,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 15:59:35,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 15:59:35,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:35" (1/1) ... [2021-12-14 15:59:35,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:59:35,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:59:35,564 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) [2021-12-14 15:59:35,576 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 [2021-12-14 15:59:35,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 15:59:35,609 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-12-14 15:59:35,609 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-12-14 15:59:35,609 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-14 15:59:35,611 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-14 15:59:35,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 15:59:35,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 15:59:35,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 15:59:35,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-14 15:59:35,611 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-14 15:59:35,673 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 15:59:35,675 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 15:59:35,815 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 15:59:35,821 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 15:59:35,821 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 15:59:35,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:59:35 BoogieIcfgContainer [2021-12-14 15:59:35,823 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 15:59:35,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 15:59:35,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 15:59:35,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 15:59:35,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:59:35" (1/3) ... [2021-12-14 15:59:35,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@404d0f48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:59:35, skipping insertion in model container [2021-12-14 15:59:35,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:35" (2/3) ... [2021-12-14 15:59:35,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@404d0f48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:59:35, skipping insertion in model container [2021-12-14 15:59:35,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:59:35" (3/3) ... [2021-12-14 15:59:35,830 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_7.i [2021-12-14 15:59:35,834 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 15:59:35,834 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 15:59:35,871 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 15:59:35,876 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 [2021-12-14 15:59:35,876 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 15:59:35,890 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) [2021-12-14 15:59:35,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 15:59:35,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:59:35,894 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:59:35,895 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:59:35,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:59:35,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1780387208, now seen corresponding path program 1 times [2021-12-14 15:59:35,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:59:35,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397785713] [2021-12-14 15:59:35,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:59:35,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:59:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:59:36,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:59:36,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:59:36,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397785713] [2021-12-14 15:59:36,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397785713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:59:36,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:59:36,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:59:36,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618217916] [2021-12-14 15:59:36,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:59:36,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:59:36,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:59:36,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:59:36,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:59:36,091 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) [2021-12-14 15:59:36,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:59:36,146 INFO L93 Difference]: Finished difference Result 97 states and 134 transitions. [2021-12-14 15:59:36,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:59:36,148 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 [2021-12-14 15:59:36,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:59:36,153 INFO L225 Difference]: With dead ends: 97 [2021-12-14 15:59:36,153 INFO L226 Difference]: Without dead ends: 45 [2021-12-14 15:59:36,157 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 [2021-12-14 15:59:36,160 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 11 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:59:36,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 100 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:59:36,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-14 15:59:36,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2021-12-14 15:59:36,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 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) [2021-12-14 15:59:36,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2021-12-14 15:59:36,193 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 11 [2021-12-14 15:59:36,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:59:36,193 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2021-12-14 15:59:36,193 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) [2021-12-14 15:59:36,194 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2021-12-14 15:59:36,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 15:59:36,195 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:59:36,195 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:59:36,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 15:59:36,195 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:59:36,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:59:36,196 INFO L85 PathProgramCache]: Analyzing trace with hash -5379846, now seen corresponding path program 1 times [2021-12-14 15:59:36,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:59:36,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923078822] [2021-12-14 15:59:36,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:59:36,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:59:36,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:59:36,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:59:36,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:59:36,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923078822] [2021-12-14 15:59:36,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923078822] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:59:36,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:59:36,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:59:36,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634024131] [2021-12-14 15:59:36,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:59:36,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:59:36,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:59:36,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:59:36,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:59:36,273 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. 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) [2021-12-14 15:59:36,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:59:36,302 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2021-12-14 15:59:36,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:59:36,303 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 [2021-12-14 15:59:36,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:59:36,305 INFO L225 Difference]: With dead ends: 67 [2021-12-14 15:59:36,305 INFO L226 Difference]: Without dead ends: 50 [2021-12-14 15:59:36,306 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 [2021-12-14 15:59:36,307 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 82 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 [2021-12-14 15:59:36,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 82 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:59:36,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-14 15:59:36,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-12-14 15:59:36,315 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) [2021-12-14 15:59:36,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-12-14 15:59:36,316 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 11 [2021-12-14 15:59:36,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:59:36,317 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-12-14 15:59:36,317 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) [2021-12-14 15:59:36,317 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-12-14 15:59:36,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-14 15:59:36,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:59:36,318 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:59:36,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 15:59:36,318 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:59:36,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:59:36,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1714945339, now seen corresponding path program 1 times [2021-12-14 15:59:36,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:59:36,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517211584] [2021-12-14 15:59:36,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:59:36,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:59:36,340 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 15:59:36,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1835164501] [2021-12-14 15:59:36,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:59:36,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:59:36,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:59:36,343 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) [2021-12-14 15:59:36,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 15:59:36,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:59:36,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 15:59:36,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:59:36,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:59:36,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 15:59:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:59:36,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:59:36,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517211584] [2021-12-14 15:59:36,528 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 15:59:36,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835164501] [2021-12-14 15:59:36,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835164501] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 15:59:36,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 15:59:36,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-14 15:59:36,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639126917] [2021-12-14 15:59:36,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 15:59:36,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:59:36,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:59:36,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:59:36,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:59:36,530 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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) [2021-12-14 15:59:36,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:59:36,562 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2021-12-14 15:59:36,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:59:36,563 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 [2021-12-14 15:59:36,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:59:36,564 INFO L225 Difference]: With dead ends: 58 [2021-12-14 15:59:36,564 INFO L226 Difference]: Without dead ends: 45 [2021-12-14 15:59:36,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:59:36,565 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:59:36,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 191 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:59:36,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-14 15:59:36,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-12-14 15:59:36,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 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) [2021-12-14 15:59:36,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2021-12-14 15:59:36,572 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 15 [2021-12-14 15:59:36,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:59:36,573 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2021-12-14 15:59:36,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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) [2021-12-14 15:59:36,573 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2021-12-14 15:59:36,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-14 15:59:36,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:59:36,574 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:59:36,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 15:59:36,799 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 [2021-12-14 15:59:36,800 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:59:36,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:59:36,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1992824063, now seen corresponding path program 1 times [2021-12-14 15:59:36,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:59:36,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875631921] [2021-12-14 15:59:36,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:59:36,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:59:36,817 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 15:59:36,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2125215143] [2021-12-14 15:59:36,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:59:36,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:59:36,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:59:36,829 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) [2021-12-14 15:59:36,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 15:59:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:59:36,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 15:59:36,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:59:37,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:59:37,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 15:59:37,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:59:37,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:59:37,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875631921] [2021-12-14 15:59:37,125 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 15:59:37,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125215143] [2021-12-14 15:59:37,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125215143] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 15:59:37,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 15:59:37,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-14 15:59:37,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822443123] [2021-12-14 15:59:37,131 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 15:59:37,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 15:59:37,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:59:37,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 15:59:37,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-14 15:59:37,134 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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) [2021-12-14 15:59:37,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:59:37,194 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2021-12-14 15:59:37,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:59:37,195 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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 19 [2021-12-14 15:59:37,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:59:37,196 INFO L225 Difference]: With dead ends: 60 [2021-12-14 15:59:37,196 INFO L226 Difference]: Without dead ends: 47 [2021-12-14 15:59:37,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-14 15:59:37,197 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:59:37,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 265 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:59:37,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-14 15:59:37,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-14 15:59:37,203 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) [2021-12-14 15:59:37,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-14 15:59:37,204 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 19 [2021-12-14 15:59:37,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:59:37,205 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-14 15:59:37,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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) [2021-12-14 15:59:37,205 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-14 15:59:37,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-14 15:59:37,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:59:37,206 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:59:37,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 15:59:37,415 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 [2021-12-14 15:59:37,416 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:59:37,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:59:37,416 INFO L85 PathProgramCache]: Analyzing trace with hash -626272964, now seen corresponding path program 2 times [2021-12-14 15:59:37,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:59:37,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749308015] [2021-12-14 15:59:37,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:59:37,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:59:37,428 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 15:59:37,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170731595] [2021-12-14 15:59:37,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 15:59:37,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:59:37,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:59:37,444 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) [2021-12-14 15:59:37,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 15:59:37,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 15:59:37,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 15:59:37,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-14 15:59:37,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:59:37,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:59:37,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 15:59:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:59:37,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:59:37,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749308015] [2021-12-14 15:59:37,691 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 15:59:37,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170731595] [2021-12-14 15:59:37,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170731595] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 15:59:37,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 15:59:37,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-14 15:59:37,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30979773] [2021-12-14 15:59:37,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 15:59:37,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 15:59:37,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:59:37,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 15:59:37,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-14 15:59:37,694 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) [2021-12-14 15:59:37,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:59:37,777 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2021-12-14 15:59:37,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 15:59:37,778 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 [2021-12-14 15:59:37,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:59:37,779 INFO L225 Difference]: With dead ends: 68 [2021-12-14 15:59:37,779 INFO L226 Difference]: Without dead ends: 53 [2021-12-14 15:59:37,780 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 [2021-12-14 15:59:37,781 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:59:37,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 301 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:59:37,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-14 15:59:37,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-14 15:59:37,786 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) [2021-12-14 15:59:37,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-12-14 15:59:37,787 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 21 [2021-12-14 15:59:37,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:59:37,788 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-12-14 15:59:37,788 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) [2021-12-14 15:59:37,788 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-12-14 15:59:37,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-14 15:59:37,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:59:37,789 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:59:37,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 15:59:38,003 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 [2021-12-14 15:59:38,004 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:59:38,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:59:38,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1120707465, now seen corresponding path program 3 times [2021-12-14 15:59:38,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:59:38,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216696351] [2021-12-14 15:59:38,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:59:38,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:59:38,015 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 15:59:38,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173395653] [2021-12-14 15:59:38,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 15:59:38,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:59:38,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:59:38,017 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) [2021-12-14 15:59:38,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 15:59:38,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-14 15:59:38,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 15:59:38,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-14 15:59:38,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:59:38,242 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 15:59:38,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 15:59:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 15:59:38,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:59:38,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216696351] [2021-12-14 15:59:38,597 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 15:59:38,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173395653] [2021-12-14 15:59:38,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173395653] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 15:59:38,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 15:59:38,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-12-14 15:59:38,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444842408] [2021-12-14 15:59:38,598 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 15:59:38,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-14 15:59:38,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:59:38,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-14 15:59:38,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-12-14 15:59:38,599 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 18 states, 16 states have (on average 2.0625) internal successors, (33), 17 states have internal predecessors, (33), 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) [2021-12-14 15:59:39,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:59:39,093 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2021-12-14 15:59:39,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-14 15:59:39,094 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 17 states have internal predecessors, (33), 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 [2021-12-14 15:59:39,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:59:39,095 INFO L225 Difference]: With dead ends: 81 [2021-12-14 15:59:39,095 INFO L226 Difference]: Without dead ends: 78 [2021-12-14 15:59:39,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-12-14 15:59:39,096 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 41 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 15:59:39,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 524 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 15:59:39,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-14 15:59:39,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2021-12-14 15:59:39,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 56 states have internal predecessors, (64), 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) [2021-12-14 15:59:39,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2021-12-14 15:59:39,106 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 23 [2021-12-14 15:59:39,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:59:39,106 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2021-12-14 15:59:39,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 17 states have internal predecessors, (33), 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) [2021-12-14 15:59:39,106 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2021-12-14 15:59:39,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-14 15:59:39,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:59:39,107 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:59:39,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 15:59:39,330 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 [2021-12-14 15:59:39,330 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:59:39,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:59:39,331 INFO L85 PathProgramCache]: Analyzing trace with hash 469106930, now seen corresponding path program 4 times [2021-12-14 15:59:39,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:59:39,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298527941] [2021-12-14 15:59:39,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:59:39,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:59:39,341 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 15:59:39,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288493761] [2021-12-14 15:59:39,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 15:59:39,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:59:39,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:59:39,342 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) [2021-12-14 15:59:39,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 15:59:39,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 15:59:39,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 15:59:39,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-14 15:59:39,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:59:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:59:39,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 15:59:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:59:39,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:59:39,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298527941] [2021-12-14 15:59:39,672 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 15:59:39,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288493761] [2021-12-14 15:59:39,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288493761] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 15:59:39,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 15:59:39,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-12-14 15:59:39,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056562538] [2021-12-14 15:59:39,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 15:59:39,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-14 15:59:39,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:59:39,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-14 15:59:39,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-12-14 15:59:39,675 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 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) [2021-12-14 15:59:39,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:59:39,836 INFO L93 Difference]: Finished difference Result 94 states and 117 transitions. [2021-12-14 15:59:39,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 15:59:39,836 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 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 [2021-12-14 15:59:39,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:59:39,838 INFO L225 Difference]: With dead ends: 94 [2021-12-14 15:59:39,838 INFO L226 Difference]: Without dead ends: 66 [2021-12-14 15:59:39,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-12-14 15:59:39,839 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 37 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:59:39,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 375 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:59:39,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-14 15:59:39,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-12-14 15:59:39,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 52 states have internal predecessors, (55), 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) [2021-12-14 15:59:39,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2021-12-14 15:59:39,846 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 25 [2021-12-14 15:59:39,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:59:39,847 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2021-12-14 15:59:39,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 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) [2021-12-14 15:59:39,847 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2021-12-14 15:59:39,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-14 15:59:39,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:59:39,848 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:59:39,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 15:59:40,061 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 [2021-12-14 15:59:40,062 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:59:40,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:59:40,062 INFO L85 PathProgramCache]: Analyzing trace with hash -985782289, now seen corresponding path program 5 times [2021-12-14 15:59:40,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:59:40,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596553754] [2021-12-14 15:59:40,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:59:40,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:59:40,072 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 15:59:40,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981864665] [2021-12-14 15:59:40,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 15:59:40,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:59:40,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:59:40,074 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) [2021-12-14 15:59:40,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 15:59:40,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-14 15:59:40,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 15:59:40,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-14 15:59:40,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:59:40,354 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:59:40,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 15:59:42,645 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:59:42,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:59:42,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596553754] [2021-12-14 15:59:42,646 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 15:59:42,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981864665] [2021-12-14 15:59:42,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981864665] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 15:59:42,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 15:59:42,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-14 15:59:42,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055733709] [2021-12-14 15:59:42,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 15:59:42,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-14 15:59:42,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:59:42,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-14 15:59:42,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-12-14 15:59:42,654 INFO L87 Difference]: Start difference. First operand 66 states and 77 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) [2021-12-14 15:59:42,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:59:42,741 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2021-12-14 15:59:42,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 15:59:42,742 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 [2021-12-14 15:59:42,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:59:42,743 INFO L225 Difference]: With dead ends: 76 [2021-12-14 15:59:42,743 INFO L226 Difference]: Without dead ends: 49 [2021-12-14 15:59:42,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-12-14 15:59:42,744 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 4 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:59:42,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 354 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2021-12-14 15:59:42,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-14 15:59:42,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-12-14 15:59:42,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-14 15:59:42,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-12-14 15:59:42,765 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 27 [2021-12-14 15:59:42,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:59:42,766 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-12-14 15:59:42,766 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) [2021-12-14 15:59:42,766 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-12-14 15:59:42,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-14 15:59:42,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:59:42,772 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] [2021-12-14 15:59:42,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-14 15:59:42,987 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 [2021-12-14 15:59:42,987 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:59:42,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:59:42,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1781630816, now seen corresponding path program 1 times [2021-12-14 15:59:42,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:59:42,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013519191] [2021-12-14 15:59:42,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:59:42,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:59:43,010 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 15:59:43,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1155488583] [2021-12-14 15:59:43,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:59:43,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:59:43,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:59:43,025 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) [2021-12-14 15:59:43,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 15:59:43,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:59:43,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-14 15:59:43,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:59:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 15:59:43,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 15:59:44,053 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 15:59:44,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:59:44,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013519191] [2021-12-14 15:59:44,053 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 15:59:44,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155488583] [2021-12-14 15:59:44,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155488583] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 15:59:44,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 15:59:44,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-12-14 15:59:44,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720186030] [2021-12-14 15:59:44,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 15:59:44,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-14 15:59:44,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:59:44,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-14 15:59:44,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-12-14 15:59:44,055 INFO L87 Difference]: Start difference. First operand 49 states and 52 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) [2021-12-14 15:59:44,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:59:44,653 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-12-14 15:59:44,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 15:59:44,654 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 [2021-12-14 15:59:44,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:59:44,654 INFO L225 Difference]: With dead ends: 49 [2021-12-14 15:59:44,654 INFO L226 Difference]: Without dead ends: 23 [2021-12-14 15:59:44,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-12-14 15:59:44,655 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 13 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:59:44,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 379 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:59:44,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-14 15:59:44,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-14 15:59:44,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.0) internal successors, (14), 14 states have internal predecessors, (14), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-14 15:59:44,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-12-14 15:59:44,662 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 28 [2021-12-14 15:59:44,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:59:44,662 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-12-14 15:59:44,662 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) [2021-12-14 15:59:44,662 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-12-14 15:59:44,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-14 15:59:44,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:59:44,665 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] [2021-12-14 15:59:44,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 15:59:44,866 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 [2021-12-14 15:59:44,866 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:59:44,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:59:44,867 INFO L85 PathProgramCache]: Analyzing trace with hash -21288017, now seen corresponding path program 1 times [2021-12-14 15:59:44,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:59:44,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848190179] [2021-12-14 15:59:44,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:59:44,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:59:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 15:59:44,878 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 15:59:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 15:59:44,901 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 15:59:44,901 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-14 15:59:44,902 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-14 15:59:44,903 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-14 15:59:44,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 15:59:44,906 INFO L732 BasicCegarLoop]: Path program histogram: [5, 1, 1, 1, 1, 1] [2021-12-14 15:59:44,916 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-14 15:59:44,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 03:59:44 BoogieIcfgContainer [2021-12-14 15:59:44,937 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-14 15:59:44,938 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-14 15:59:44,938 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-14 15:59:44,938 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-14 15:59:44,938 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:59:35" (3/4) ... [2021-12-14 15:59:44,940 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-14 15:59:44,940 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-14 15:59:44,940 INFO L158 Benchmark]: Toolchain (without parser) took 9665.10ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 65.0MB in the beginning and 87.4MB in the end (delta: -22.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 15:59:44,940 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 79.7MB. Free memory was 49.8MB in the beginning and 49.8MB in the end (delta: 18.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 15:59:44,941 INFO L158 Benchmark]: CACSL2BoogieTranslator took 212.39ms. Allocated memory is still 96.5MB. Free memory was 65.0MB in the beginning and 71.8MB in the end (delta: -6.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-14 15:59:44,941 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.42ms. Allocated memory is still 96.5MB. Free memory was 71.8MB in the beginning and 70.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 15:59:44,941 INFO L158 Benchmark]: Boogie Preprocessor took 19.22ms. Allocated memory is still 96.5MB. Free memory was 70.4MB in the beginning and 69.2MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 15:59:44,941 INFO L158 Benchmark]: RCFGBuilder took 286.26ms. Allocated memory is still 96.5MB. Free memory was 68.9MB in the beginning and 57.8MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-14 15:59:44,941 INFO L158 Benchmark]: TraceAbstraction took 9112.55ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 57.2MB in the beginning and 88.4MB in the end (delta: -31.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 15:59:44,941 INFO L158 Benchmark]: Witness Printer took 2.38ms. Allocated memory is still 117.4MB. Free memory was 88.4MB in the beginning and 87.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 15:59:44,942 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 79.7MB. Free memory was 49.8MB in the beginning and 49.8MB in the end (delta: 18.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 212.39ms. Allocated memory is still 96.5MB. Free memory was 65.0MB in the beginning and 71.8MB in the end (delta: -6.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.42ms. Allocated memory is still 96.5MB. Free memory was 71.8MB in the beginning and 70.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.22ms. Allocated memory is still 96.5MB. Free memory was 70.4MB in the beginning and 69.2MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 286.26ms. Allocated memory is still 96.5MB. Free memory was 68.9MB in the beginning and 57.8MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 9112.55ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 57.2MB in the beginning and 88.4MB in the end (delta: -31.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 2.38ms. Allocated memory is still 117.4MB. Free memory was 88.4MB in the beginning and 87.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. 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 > -1.4f && IN < 1.4f) [L82] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L98] RET assume_abort_if_not(IN > -1.4f && IN < 1.4f) [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: 9.0s, OverallIterations: 10, TraceHistogramMax: 7, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 135 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 127 mSDsluCounter, 2571 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 25 IncrementalHoareTripleChecker+Unchecked, 2202 mSDsCounter, 103 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 840 IncrementalHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 103 mSolverCounterUnsat, 369 mSDtfsCounter, 840 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 332 GetRequests, 222 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=6, InterpolantAutomatonStates: 72, 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, 9 MinimizatonAttempts, 21 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 214 NumberOfCodeBlocks, 210 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 322 ConstructedInterpolants, 10 QuantifiedInterpolants, 2071 SizeOfPredicates, 45 NumberOfNonLiveVariables, 545 ConjunctsInSsa, 109 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 56/326 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 [2021-12-14 15:59:44,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, 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_7.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 87bc0d62bd0ac2c8f0b3bcd924815b04302ef88419a4b535524b284cb471b329 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 15:59:46,840 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 15:59:46,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 15:59:46,880 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 15:59:46,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 15:59:46,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 15:59:46,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 15:59:46,889 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 15:59:46,891 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 15:59:46,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 15:59:46,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 15:59:46,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 15:59:46,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 15:59:46,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 15:59:46,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 15:59:46,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 15:59:46,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 15:59:46,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 15:59:46,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 15:59:46,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 15:59:46,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 15:59:46,917 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 15:59:46,918 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 15:59:46,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 15:59:46,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 15:59:46,930 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 15:59:46,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 15:59:46,932 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 15:59:46,933 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 15:59:46,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 15:59:46,934 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 15:59:46,934 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 15:59:46,936 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 15:59:46,936 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 15:59:46,937 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 15:59:46,938 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 15:59:46,938 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 15:59:46,938 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 15:59:46,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 15:59:46,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 15:59:46,940 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 15:59:46,944 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-14 15:59:46,975 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 15:59:46,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 15:59:46,976 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 15:59:46,977 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 15:59:46,977 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 15:59:46,977 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 15:59:46,978 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 15:59:46,979 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 15:59:46,979 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 15:59:46,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 15:59:46,980 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 15:59:46,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 15:59:46,980 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 15:59:46,980 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 15:59:46,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 15:59:46,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 15:59:46,981 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 15:59:46,981 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-14 15:59:46,981 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-14 15:59:46,981 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 15:59:46,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 15:59:46,982 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 15:59:46,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 15:59:46,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 15:59:46,982 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 15:59:46,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 15:59:46,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:59:46,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 15:59:46,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 15:59:46,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 15:59:46,983 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-14 15:59:46,984 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-14 15:59:46,984 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 15:59:46,984 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 15:59:46,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 15:59:46,984 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 15:59:46,985 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-14 15:59:46,985 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87bc0d62bd0ac2c8f0b3bcd924815b04302ef88419a4b535524b284cb471b329 [2021-12-14 15:59:47,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 15:59:47,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 15:59:47,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 15:59:47,298 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 15:59:47,298 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 15:59:47,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_4+newton_3_7.i [2021-12-14 15:59:47,360 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8689793ed/178a5bace5d74a32b01b939b8751a40a/FLAGa523b6d5b [2021-12-14 15:59:47,815 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 15:59:47,816 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_3_7.i [2021-12-14 15:59:47,824 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8689793ed/178a5bace5d74a32b01b939b8751a40a/FLAGa523b6d5b [2021-12-14 15:59:47,841 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8689793ed/178a5bace5d74a32b01b939b8751a40a [2021-12-14 15:59:47,843 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 15:59:47,845 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 15:59:47,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 15:59:47,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 15:59:47,851 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 15:59:47,851 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:59:47" (1/1) ... [2021-12-14 15:59:47,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2449f630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:47, skipping insertion in model container [2021-12-14 15:59:47,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:59:47" (1/1) ... [2021-12-14 15:59:47,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 15:59:47,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 15:59:48,033 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_7.i[1224,1237] [2021-12-14 15:59:48,074 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_7.i[2848,2861] [2021-12-14 15:59:48,077 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:59:48,091 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 15:59:48,118 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_7.i[1224,1237] [2021-12-14 15:59:48,154 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_7.i[2848,2861] [2021-12-14 15:59:48,157 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:59:48,171 INFO L208 MainTranslator]: Completed translation [2021-12-14 15:59:48,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:48 WrapperNode [2021-12-14 15:59:48,172 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 15:59:48,173 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 15:59:48,173 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 15:59:48,173 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 15:59:48,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:48" (1/1) ... [2021-12-14 15:59:48,195 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:48" (1/1) ... [2021-12-14 15:59:48,218 INFO L137 Inliner]: procedures = 28, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 74 [2021-12-14 15:59:48,219 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 15:59:48,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 15:59:48,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 15:59:48,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 15:59:48,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:48" (1/1) ... [2021-12-14 15:59:48,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:48" (1/1) ... [2021-12-14 15:59:48,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:48" (1/1) ... [2021-12-14 15:59:48,237 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:48" (1/1) ... [2021-12-14 15:59:48,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:48" (1/1) ... [2021-12-14 15:59:48,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:48" (1/1) ... [2021-12-14 15:59:48,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:48" (1/1) ... [2021-12-14 15:59:48,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 15:59:48,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 15:59:48,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 15:59:48,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 15:59:48,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:48" (1/1) ... [2021-12-14 15:59:48,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:59:48,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:59:48,300 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) [2021-12-14 15:59:48,319 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 [2021-12-14 15:59:48,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 15:59:48,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-14 15:59:48,344 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-12-14 15:59:48,344 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-12-14 15:59:48,344 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-14 15:59:48,344 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-14 15:59:48,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 15:59:48,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 15:59:48,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-14 15:59:48,345 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-14 15:59:48,425 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 15:59:48,426 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 15:59:59,290 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 15:59:59,300 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 15:59:59,300 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 15:59:59,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:59:59 BoogieIcfgContainer [2021-12-14 15:59:59,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 15:59:59,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 15:59:59,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 15:59:59,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 15:59:59,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:59:47" (1/3) ... [2021-12-14 15:59:59,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3785a572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:59:59, skipping insertion in model container [2021-12-14 15:59:59,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:48" (2/3) ... [2021-12-14 15:59:59,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3785a572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:59:59, skipping insertion in model container [2021-12-14 15:59:59,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:59:59" (3/3) ... [2021-12-14 15:59:59,309 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_7.i [2021-12-14 15:59:59,313 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 15:59:59,313 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 15:59:59,352 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 15:59:59,361 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 [2021-12-14 15:59:59,361 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 15:59:59,386 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) [2021-12-14 15:59:59,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 15:59:59,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:59:59,391 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:59:59,391 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:59:59,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:59:59,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1780387208, now seen corresponding path program 1 times [2021-12-14 15:59:59,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 15:59:59,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981044332] [2021-12-14 15:59:59,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:59:59,407 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 15:59:59,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 15:59:59,409 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) [2021-12-14 15:59:59,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-14 15:59:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:59:59,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 15:59:59,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:59:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:59:59,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:59:59,656 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 15:59:59,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981044332] [2021-12-14 15:59:59,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1981044332] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:59:59,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:59:59,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:59:59,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217870449] [2021-12-14 15:59:59,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:59:59,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:59:59,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 15:59:59,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:59:59,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:59:59,693 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) [2021-12-14 15:59:59,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:59:59,799 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2021-12-14 15:59:59,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:59:59,802 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 [2021-12-14 15:59:59,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:59:59,809 INFO L225 Difference]: With dead ends: 99 [2021-12-14 15:59:59,809 INFO L226 Difference]: Without dead ends: 46 [2021-12-14 15:59:59,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:59:59,817 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 [2021-12-14 15:59:59,819 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] [2021-12-14 15:59:59,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-14 15:59:59,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2021-12-14 15:59:59,859 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) [2021-12-14 15:59:59,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-12-14 15:59:59,863 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 11 [2021-12-14 15:59:59,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:59:59,864 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-12-14 15:59:59,864 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) [2021-12-14 15:59:59,864 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-12-14 15:59:59,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-14 15:59:59,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:59:59,867 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:59:59,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-14 16:00:00,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 16:00:00,079 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:00:00,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:00:00,080 INFO L85 PathProgramCache]: Analyzing trace with hash 413718792, now seen corresponding path program 1 times [2021-12-14 16:00:00,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 16:00:00,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151533233] [2021-12-14 16:00:00,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:00:00,081 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 16:00:00,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 16:00:00,085 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) [2021-12-14 16:00:00,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-14 16:00:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:00:00,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 16:00:00,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:00:00,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:00:00,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:00:00,335 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 16:00:00,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151533233] [2021-12-14 16:00:00,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151533233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:00:00,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:00:00,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:00:00,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988501898] [2021-12-14 16:00:00,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:00:00,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:00:00,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 16:00:00,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:00:00,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:00:00,338 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) [2021-12-14 16:00:00,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:00:00,419 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2021-12-14 16:00:00,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:00:00,420 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 [2021-12-14 16:00:00,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:00:00,421 INFO L225 Difference]: With dead ends: 55 [2021-12-14 16:00:00,421 INFO L226 Difference]: Without dead ends: 41 [2021-12-14 16:00:00,421 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 [2021-12-14 16:00:00,423 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 [2021-12-14 16:00:00,423 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] [2021-12-14 16:00:00,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-14 16:00:00,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-12-14 16:00:00,429 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) [2021-12-14 16:00:00,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-12-14 16:00:00,430 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 13 [2021-12-14 16:00:00,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:00:00,431 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-12-14 16:00:00,431 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) [2021-12-14 16:00:00,431 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-12-14 16:00:00,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-14 16:00:00,432 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:00:00,432 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:00:00,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-14 16:00:00,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 16:00:00,643 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:00:00,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:00:00,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1714945339, now seen corresponding path program 1 times [2021-12-14 16:00:00,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 16:00:00,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508592021] [2021-12-14 16:00:00,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:00:00,645 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 16:00:00,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 16:00:00,646 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) [2021-12-14 16:00:00,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-14 16:00:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:00:00,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 16:00:00,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:00:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:00:01,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:00:01,075 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 16:00:01,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508592021] [2021-12-14 16:00:01,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508592021] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:00:01,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:00:01,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:00:01,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922194287] [2021-12-14 16:00:01,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:00:01,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:00:01,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 16:00:01,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:00:01,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:00:01,077 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) [2021-12-14 16:00:01,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:00:01,183 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2021-12-14 16:00:01,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:00:01,184 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 [2021-12-14 16:00:01,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:00:01,185 INFO L225 Difference]: With dead ends: 56 [2021-12-14 16:00:01,185 INFO L226 Difference]: Without dead ends: 43 [2021-12-14 16:00:01,185 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 [2021-12-14 16:00:01,186 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 [2021-12-14 16:00:01,187 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] [2021-12-14 16:00:01,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-14 16:00:01,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-14 16:00:01,195 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) [2021-12-14 16:00:01,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2021-12-14 16:00:01,197 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 15 [2021-12-14 16:00:01,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:00:01,197 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-12-14 16:00:01,197 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) [2021-12-14 16:00:01,198 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2021-12-14 16:00:01,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 16:00:01,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:00:01,200 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:00:01,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-14 16:00:01,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 16:00:01,406 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:00:01,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:00:01,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1030187394, now seen corresponding path program 1 times [2021-12-14 16:00:01,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 16:00:01,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1849550985] [2021-12-14 16:00:01,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:00:01,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 16:00:01,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 16:00:01,410 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) [2021-12-14 16:00:01,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-14 16:00:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:00:01,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 16:00:01,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:00:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:00:02,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:00:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:00:02,337 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 16:00:02,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1849550985] [2021-12-14 16:00:02,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1849550985] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:00:02,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 16:00:02,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-14 16:00:02,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880258242] [2021-12-14 16:00:02,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 16:00:02,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:00:02,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 16:00:02,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:00:02,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:00:02,339 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) [2021-12-14 16:00:02,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:00:02,570 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2021-12-14 16:00:02,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:00:02,571 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 [2021-12-14 16:00:02,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:00:02,572 INFO L225 Difference]: With dead ends: 60 [2021-12-14 16:00:02,573 INFO L226 Difference]: Without dead ends: 47 [2021-12-14 16:00:02,574 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 [2021-12-14 16:00:02,575 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 [2021-12-14 16:00:02,575 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] [2021-12-14 16:00:02,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-14 16:00:02,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-14 16:00:02,580 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) [2021-12-14 16:00:02,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-14 16:00:02,581 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 17 [2021-12-14 16:00:02,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:00:02,582 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-14 16:00:02,582 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) [2021-12-14 16:00:02,582 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-14 16:00:02,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-14 16:00:02,583 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:00:02,583 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:00:02,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-14 16:00:02,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 16:00:02,784 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:00:02,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:00:02,785 INFO L85 PathProgramCache]: Analyzing trace with hash -626272964, now seen corresponding path program 2 times [2021-12-14 16:00:02,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 16:00:02,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1432369681] [2021-12-14 16:00:02,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 16:00:02,786 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 16:00:02,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 16:00:02,787 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) [2021-12-14 16:00:02,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-14 16:00:02,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 16:00:02,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:00:02,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-14 16:00:02,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:00:04,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:00:04,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:00:12,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:00:12,437 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 16:00:12,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1432369681] [2021-12-14 16:00:12,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1432369681] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:00:12,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 16:00:12,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-14 16:00:12,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334337718] [2021-12-14 16:00:12,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 16:00:12,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-14 16:00:12,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 16:00:12,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-14 16:00:12,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-12-14 16:00:12,440 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) [2021-12-14 16:00:32,684 WARN L227 SmtUtils]: Spent 6.90s 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)