./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_3+newton_2_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_3+newton_2_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 a7443921b0608d3c2ff1c61e12bf7cf129e5c1aecf22f0fb9785817b90c162e7 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 15:56:34,597 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 15:56:34,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 15:56:34,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 15:56:34,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 15:56:34,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 15:56:34,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 15:56:34,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 15:56:34,641 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 15:56:34,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 15:56:34,646 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 15:56:34,647 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 15:56:34,647 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 15:56:34,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 15:56:34,651 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 15:56:34,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 15:56:34,657 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 15:56:34,658 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 15:56:34,665 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 15:56:34,671 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 15:56:34,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 15:56:34,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 15:56:34,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 15:56:34,676 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 15:56:34,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 15:56:34,681 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 15:56:34,682 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 15:56:34,683 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 15:56:34,684 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 15:56:34,684 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 15:56:34,684 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 15:56:34,685 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 15:56:34,687 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 15:56:34,688 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 15:56:34,689 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 15:56:34,689 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 15:56:34,689 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 15:56:34,689 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 15:56:34,690 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 15:56:34,690 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 15:56:34,691 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 15:56:34,691 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 15:56:34,718 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 15:56:34,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 15:56:34,719 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 15:56:34,720 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 15:56:34,721 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 15:56:34,721 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 15:56:34,721 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 15:56:34,721 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 15:56:34,722 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 15:56:34,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 15:56:34,723 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 15:56:34,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 15:56:34,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 15:56:34,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 15:56:34,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 15:56:34,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 15:56:34,724 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 15:56:34,724 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 15:56:34,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 15:56:34,724 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 15:56:34,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 15:56:34,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 15:56:34,725 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 15:56:34,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 15:56:34,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:56:34,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 15:56:34,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 15:56:34,727 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 15:56:34,727 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 15:56:34,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 15:56:34,727 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 15:56:34,727 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 15:56:34,728 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 15:56:34,728 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 15:56:34,728 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a7443921b0608d3c2ff1c61e12bf7cf129e5c1aecf22f0fb9785817b90c162e7 [2021-12-14 15:56:34,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 15:56:34,983 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 15:56:34,985 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 15:56:34,986 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 15:56:34,986 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 15:56:34,987 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_3+newton_2_7.i [2021-12-14 15:56:35,059 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eddee8da5/14461b2b04b045d69eae1b39ccbc80e4/FLAG8977b8875 [2021-12-14 15:56:35,405 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 15:56:35,406 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_3+newton_2_7.i [2021-12-14 15:56:35,410 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eddee8da5/14461b2b04b045d69eae1b39ccbc80e4/FLAG8977b8875 [2021-12-14 15:56:35,836 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eddee8da5/14461b2b04b045d69eae1b39ccbc80e4 [2021-12-14 15:56:35,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 15:56:35,842 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 15:56:35,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 15:56:35,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 15:56:35,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 15:56:35,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:56:35" (1/1) ... [2021-12-14 15:56:35,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bf465b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:56:35, skipping insertion in model container [2021-12-14 15:56:35,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:56:35" (1/1) ... [2021-12-14 15:56:35,855 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 15:56:35,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 15:56:35,975 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_3+newton_2_7.i[1226,1239] [2021-12-14 15:56:35,994 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_3+newton_2_7.i[2841,2854] [2021-12-14 15:56:35,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:56:36,006 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 15:56:36,021 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_3+newton_2_7.i[1226,1239] [2021-12-14 15:56:36,028 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_3+newton_2_7.i[2841,2854] [2021-12-14 15:56:36,029 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:56:36,039 INFO L208 MainTranslator]: Completed translation [2021-12-14 15:56:36,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:56:36 WrapperNode [2021-12-14 15:56:36,040 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 15:56:36,041 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 15:56:36,041 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 15:56:36,041 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 15:56:36,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:56:36" (1/1) ... [2021-12-14 15:56:36,051 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:56:36" (1/1) ... [2021-12-14 15:56:36,068 INFO L137 Inliner]: procedures = 27, calls = 16, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 77 [2021-12-14 15:56:36,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 15:56:36,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 15:56:36,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 15:56:36,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 15:56:36,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:56:36" (1/1) ... [2021-12-14 15:56:36,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:56:36" (1/1) ... [2021-12-14 15:56:36,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:56:36" (1/1) ... [2021-12-14 15:56:36,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:56:36" (1/1) ... [2021-12-14 15:56:36,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:56:36" (1/1) ... [2021-12-14 15:56:36,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:56:36" (1/1) ... [2021-12-14 15:56:36,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:56:36" (1/1) ... [2021-12-14 15:56:36,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 15:56:36,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 15:56:36,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 15:56:36,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 15:56:36,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:56:36" (1/1) ... [2021-12-14 15:56:36,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:56:36,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:56:36,120 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 15:56:36,122 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 15:56:36,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 15:56:36,158 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-12-14 15:56:36,158 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-12-14 15:56:36,158 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-14 15:56:36,159 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-14 15:56:36,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 15:56:36,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 15:56:36,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 15:56:36,212 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 15:56:36,214 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 15:56:36,399 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 15:56:36,403 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 15:56:36,404 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 15:56:36,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:56:36 BoogieIcfgContainer [2021-12-14 15:56:36,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 15:56:36,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 15:56:36,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 15:56:36,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 15:56:36,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:56:35" (1/3) ... [2021-12-14 15:56:36,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aa2a105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:56:36, skipping insertion in model container [2021-12-14 15:56:36,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:56:36" (2/3) ... [2021-12-14 15:56:36,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aa2a105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:56:36, skipping insertion in model container [2021-12-14 15:56:36,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:56:36" (3/3) ... [2021-12-14 15:56:36,415 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_2_7.i [2021-12-14 15:56:36,418 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 15:56:36,419 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 15:56:36,460 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 15:56:36,467 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 15:56:36,467 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 15:56:36,492 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 15:56:36,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 15:56:36,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:56:36,496 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:56:36,497 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:56:36,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:56:36,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2021-12-14 15:56:36,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:56:36,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584625715] [2021-12-14 15:56:36,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:56:36,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:56:36,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:56:36,715 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 15:56:36,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:56:36,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584625715] [2021-12-14 15:56:36,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584625715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:56:36,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:56:36,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:56:36,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160431159] [2021-12-14 15:56:36,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:56:36,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 15:56:36,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:56:36,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 15:56:36,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:56:36,755 INFO L87 Difference]: Start difference. First operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:56:36,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:56:36,810 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2021-12-14 15:56:36,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:56:36,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-14 15:56:36,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:56:36,817 INFO L225 Difference]: With dead ends: 90 [2021-12-14 15:56:36,817 INFO L226 Difference]: Without dead ends: 36 [2021-12-14 15:56:36,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:56:36,823 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 23 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:56:36,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 119 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:56:36,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-14 15:56:36,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2021-12-14 15:56:36,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 15:56:36,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-12-14 15:56:36,854 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 11 [2021-12-14 15:56:36,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:56:36,855 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-12-14 15:56:36,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:56:36,855 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-12-14 15:56:36,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 15:56:36,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:56:36,857 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:56:36,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 15:56:36,857 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:56:36,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:56:36,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1776235347, now seen corresponding path program 1 times [2021-12-14 15:56:36,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:56:36,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209836303] [2021-12-14 15:56:36,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:56:36,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:56:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:56:36,980 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 15:56:36,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:56:36,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209836303] [2021-12-14 15:56:36,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209836303] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:56:36,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:56:36,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:56:36,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179869399] [2021-12-14 15:56:36,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:56:36,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:56:36,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:56:36,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:56:36,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:56:36,986 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:56:37,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:56:37,056 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-12-14 15:56:37,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:56:37,057 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-14 15:56:37,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:56:37,058 INFO L225 Difference]: With dead ends: 36 [2021-12-14 15:56:37,058 INFO L226 Difference]: Without dead ends: 30 [2021-12-14 15:56:37,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 15:56:37,062 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:56:37,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:56:37,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-14 15:56:37,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-14 15:56:37,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 15:56:37,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-12-14 15:56:37,070 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2021-12-14 15:56:37,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:56:37,072 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-12-14 15:56:37,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:56:37,073 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-12-14 15:56:37,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-14 15:56:37,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:56:37,074 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:56:37,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 15:56:37,075 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:56:37,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:56:37,078 INFO L85 PathProgramCache]: Analyzing trace with hash 830014046, now seen corresponding path program 1 times [2021-12-14 15:56:37,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:56:37,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423503707] [2021-12-14 15:56:37,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:56:37,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:56:37,086 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 15:56:37,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215604415] [2021-12-14 15:56:37,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:56:37,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:56:37,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:56:37,102 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 15:56:37,104 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 15:56:37,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:56:37,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-14 15:56:37,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:57:04,575 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 15:57:04,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 15:57:08,947 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 15:57:08,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:57:08,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423503707] [2021-12-14 15:57:08,948 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 15:57:08,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215604415] [2021-12-14 15:57:08,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215604415] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 15:57:08,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 15:57:08,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-12-14 15:57:08,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633182299] [2021-12-14 15:57:08,949 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 15:57:08,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-14 15:57:08,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:57:08,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-14 15:57:08,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=207, Unknown=11, NotChecked=0, Total=272 [2021-12-14 15:57:08,950 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:57:09,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:57:09,435 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-12-14 15:57:09,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 15:57:09,436 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-14 15:57:09,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:57:09,436 INFO L225 Difference]: With dead ends: 42 [2021-12-14 15:57:09,441 INFO L226 Difference]: Without dead ends: 33 [2021-12-14 15:57:09,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=74, Invalid=257, Unknown=11, NotChecked=0, Total=342 [2021-12-14 15:57:09,443 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:57:09,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 231 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2021-12-14 15:57:09,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-14 15:57:09,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-12-14 15:57:09,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 15:57:09,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-12-14 15:57:09,446 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 12 [2021-12-14 15:57:09,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:57:09,447 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-12-14 15:57:09,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:57:09,447 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-12-14 15:57:09,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-14 15:57:09,447 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:57:09,447 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:57:09,466 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 15:57:09,655 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 15:57:09,656 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:57:09,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:57:09,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1561924787, now seen corresponding path program 2 times [2021-12-14 15:57:09,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:57:09,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552607459] [2021-12-14 15:57:09,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:57:09,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:57:09,662 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 15:57:09,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949443367] [2021-12-14 15:57:09,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 15:57:09,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:57:09,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:57:09,664 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 15:57:09,664 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 15:57:09,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 15:57:09,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 15:57:09,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-14 15:57:09,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:57:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:57:11,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 15:57:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:57:43,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:57:43,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552607459] [2021-12-14 15:57:43,605 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 15:57:43,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949443367] [2021-12-14 15:57:43,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949443367] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 15:57:43,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 15:57:43,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-12-14 15:57:43,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828606831] [2021-12-14 15:57:43,606 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 15:57:43,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-14 15:57:43,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:57:43,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-14 15:57:43,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=181, Unknown=10, NotChecked=0, Total=240 [2021-12-14 15:57:43,607 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:57:43,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:57:43,802 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-12-14 15:57:43,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 15:57:43,809 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-14 15:57:43,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:57:43,810 INFO L225 Difference]: With dead ends: 43 [2021-12-14 15:57:43,810 INFO L226 Difference]: Without dead ends: 34 [2021-12-14 15:57:43,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=49, Invalid=181, Unknown=10, NotChecked=0, Total=240 [2021-12-14 15:57:43,811 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 15:57:43,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 311 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2021-12-14 15:57:43,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-14 15:57:43,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-14 15:57:43,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 15:57:43,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-12-14 15:57:43,814 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 13 [2021-12-14 15:57:43,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:57:43,814 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-12-14 15:57:43,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:57:43,814 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-12-14 15:57:43,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-14 15:57:43,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:57:43,815 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:57:43,831 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 15:57:44,015 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 15:57:44,015 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:57:44,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:57:44,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1518646018, now seen corresponding path program 3 times [2021-12-14 15:57:44,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:57:44,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796898103] [2021-12-14 15:57:44,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:57:44,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:57:44,021 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 15:57:44,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908602846] [2021-12-14 15:57:44,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 15:57:44,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:57:44,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:57:44,023 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 15:57:44,026 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 15:57:44,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-14 15:57:44,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 15:57:44,091 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-14 15:57:44,092 INFO L286 TraceCheckSpWp]: Computing forward predicates...