./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_1+newton_3_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/gcd_1+newton_3_3.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 bf18a45b9b9a30137533b9517bddb2c27979a6060c07746e0407bf72765a3792 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 19:22:33,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 19:22:33,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 19:22:33,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 19:22:33,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 19:22:33,582 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 19:22:33,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 19:22:33,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 19:22:33,589 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 19:22:33,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 19:22:33,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 19:22:33,594 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 19:22:33,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 19:22:33,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 19:22:33,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 19:22:33,601 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 19:22:33,602 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 19:22:33,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 19:22:33,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 19:22:33,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 19:22:33,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 19:22:33,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 19:22:33,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 19:22:33,613 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 19:22:33,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 19:22:33,619 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 19:22:33,619 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 19:22:33,620 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 19:22:33,621 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 19:22:33,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 19:22:33,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 19:22:33,622 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 19:22:33,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 19:22:33,624 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 19:22:33,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 19:22:33,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 19:22:33,626 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 19:22:33,626 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 19:22:33,626 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 19:22:33,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 19:22:33,627 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 19:22:33,627 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 19:22:33,644 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 19:22:33,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 19:22:33,646 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 19:22:33,646 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 19:22:33,647 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 19:22:33,647 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 19:22:33,647 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 19:22:33,648 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 19:22:33,648 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 19:22:33,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 19:22:33,648 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 19:22:33,649 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 19:22:33,649 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 19:22:33,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 19:22:33,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 19:22:33,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 19:22:33,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 19:22:33,649 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 19:22:33,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 19:22:33,650 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 19:22:33,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 19:22:33,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 19:22:33,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 19:22:33,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 19:22:33,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 19:22:33,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 19:22:33,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 19:22:33,651 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 19:22:33,651 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 19:22:33,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 19:22:33,651 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 19:22:33,652 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 19:22:33,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 19:22:33,652 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 19:22:33,652 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf18a45b9b9a30137533b9517bddb2c27979a6060c07746e0407bf72765a3792 [2021-12-17 19:22:33,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 19:22:33,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 19:22:33,857 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 19:22:33,858 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 19:22:33,858 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 19:22:33,859 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_1+newton_3_3.i [2021-12-17 19:22:33,919 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/994399a51/67ecb4b9a9014256bf3b2274ceadd095/FLAG3b78d4a30 [2021-12-17 19:22:34,286 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 19:22:34,286 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_1+newton_3_3.i [2021-12-17 19:22:34,290 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/994399a51/67ecb4b9a9014256bf3b2274ceadd095/FLAG3b78d4a30 [2021-12-17 19:22:34,298 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/994399a51/67ecb4b9a9014256bf3b2274ceadd095 [2021-12-17 19:22:34,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 19:22:34,301 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 19:22:34,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 19:22:34,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 19:22:34,304 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 19:22:34,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 07:22:34" (1/1) ... [2021-12-17 19:22:34,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b653bf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:22:34, skipping insertion in model container [2021-12-17 19:22:34,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 07:22:34" (1/1) ... [2021-12-17 19:22:34,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 19:22:34,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 19:22:34,449 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_1+newton_3_3.i[1226,1239] [2021-12-17 19:22:34,466 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_1+newton_3_3.i[2828,2841] [2021-12-17 19:22:34,467 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 19:22:34,475 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 19:22:34,486 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_1+newton_3_3.i[1226,1239] [2021-12-17 19:22:34,493 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_1+newton_3_3.i[2828,2841] [2021-12-17 19:22:34,494 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 19:22:34,507 INFO L208 MainTranslator]: Completed translation [2021-12-17 19:22:34,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:22:34 WrapperNode [2021-12-17 19:22:34,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 19:22:34,508 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 19:22:34,508 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 19:22:34,508 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 19:22:34,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:22:34" (1/1) ... [2021-12-17 19:22:34,518 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:22:34" (1/1) ... [2021-12-17 19:22:34,533 INFO L137 Inliner]: procedures = 27, calls = 18, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 82 [2021-12-17 19:22:34,533 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 19:22:34,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 19:22:34,534 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 19:22:34,534 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 19:22:34,539 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:22:34" (1/1) ... [2021-12-17 19:22:34,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:22:34" (1/1) ... [2021-12-17 19:22:34,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:22:34" (1/1) ... [2021-12-17 19:22:34,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:22:34" (1/1) ... [2021-12-17 19:22:34,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:22:34" (1/1) ... [2021-12-17 19:22:34,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:22:34" (1/1) ... [2021-12-17 19:22:34,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:22:34" (1/1) ... [2021-12-17 19:22:34,550 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 19:22:34,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 19:22:34,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 19:22:34,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 19:22:34,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:22:34" (1/1) ... [2021-12-17 19:22:34,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 19:22:34,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:22:34,591 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) [2021-12-17 19:22:34,609 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 [2021-12-17 19:22:34,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 19:22:34,625 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-12-17 19:22:34,625 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-12-17 19:22:34,625 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-17 19:22:34,627 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-17 19:22:34,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 19:22:34,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 19:22:34,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 19:22:34,673 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 19:22:34,674 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 19:22:34,855 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 19:22:34,860 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 19:22:34,860 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 19:22:34,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 07:22:34 BoogieIcfgContainer [2021-12-17 19:22:34,861 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 19:22:34,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 19:22:34,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 19:22:34,866 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 19:22:34,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 07:22:34" (1/3) ... [2021-12-17 19:22:34,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eed234e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 07:22:34, skipping insertion in model container [2021-12-17 19:22:34,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:22:34" (2/3) ... [2021-12-17 19:22:34,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eed234e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 07:22:34, skipping insertion in model container [2021-12-17 19:22:34,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 07:22:34" (3/3) ... [2021-12-17 19:22:34,868 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_3_3.i [2021-12-17 19:22:34,878 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 19:22:34,879 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 19:22:34,923 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 19:22:34,929 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 [2021-12-17 19:22:34,929 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 19:22:34,948 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 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) [2021-12-17 19:22:34,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-17 19:22:34,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:22:34,951 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:22:34,952 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:22:34,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:22:34,955 INFO L85 PathProgramCache]: Analyzing trace with hash -247750664, now seen corresponding path program 1 times [2021-12-17 19:22:34,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:22:34,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26324092] [2021-12-17 19:22:34,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:22:34,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:22:35,035 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 19:22:35,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [536653022] [2021-12-17 19:22:35,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:22:35,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:22:35,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:22:35,037 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) [2021-12-17 19:22:35,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 19:22:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:22:35,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-17 19:22:35,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:22:35,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:22:35,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:22:35,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:22:35,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26324092] [2021-12-17 19:22:35,143 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 19:22:35,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536653022] [2021-12-17 19:22:35,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536653022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:22:35,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:22:35,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 19:22:35,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988227424] [2021-12-17 19:22:35,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:22:35,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 19:22:35,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:22:35,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 19:22:35,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 19:22:35,188 INFO L87 Difference]: Start difference. First operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-12-17 19:22:35,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:22:35,205 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2021-12-17 19:22:35,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 19:22:35,206 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 [2021-12-17 19:22:35,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:22:35,214 INFO L225 Difference]: With dead ends: 72 [2021-12-17 19:22:35,214 INFO L226 Difference]: Without dead ends: 32 [2021-12-17 19:22:35,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 19:22:35,220 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:22:35,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:22:35,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-17 19:22:35,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-12-17 19:22:35,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 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) [2021-12-17 19:22:35,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-12-17 19:22:35,251 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 11 [2021-12-17 19:22:35,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:22:35,252 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-12-17 19:22:35,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-12-17 19:22:35,252 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-12-17 19:22:35,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-17 19:22:35,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:22:35,254 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:22:35,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 19:22:35,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-17 19:22:35,471 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:22:35,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:22:35,472 INFO L85 PathProgramCache]: Analyzing trace with hash -251444748, now seen corresponding path program 1 times [2021-12-17 19:22:35,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:22:35,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732172697] [2021-12-17 19:22:35,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:22:35,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:22:35,481 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 19:22:35,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868106705] [2021-12-17 19:22:35,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:22:35,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:22:35,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:22:35,485 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) [2021-12-17 19:22:35,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 19:22:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:22:35,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 19:22:35,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:22:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:22:35,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:22:35,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:22:35,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732172697] [2021-12-17 19:22:35,557 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 19:22:35,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868106705] [2021-12-17 19:22:35,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868106705] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:22:35,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:22:35,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 19:22:35,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703022426] [2021-12-17 19:22:35,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:22:35,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:22:35,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:22:35,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:22:35,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 19:22:35,560 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-12-17 19:22:35,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:22:35,575 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-12-17 19:22:35,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:22:35,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 [2021-12-17 19:22:35,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:22:35,577 INFO L225 Difference]: With dead ends: 39 [2021-12-17 19:22:35,577 INFO L226 Difference]: Without dead ends: 33 [2021-12-17 19:22:35,577 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 [2021-12-17 19:22:35,579 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:22:35,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 66 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:22:35,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-17 19:22:35,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-17 19:22:35,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 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) [2021-12-17 19:22:35,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-12-17 19:22:35,591 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2021-12-17 19:22:35,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:22:35,591 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-12-17 19:22:35,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-12-17 19:22:35,592 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-12-17 19:22:35,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-17 19:22:35,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:22:35,593 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:22:35,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 19:22:35,799 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,SelfDestructingSolverStorable1 [2021-12-17 19:22:35,800 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:22:35,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:22:35,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1673157840, now seen corresponding path program 1 times [2021-12-17 19:22:35,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:22:35,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763088591] [2021-12-17 19:22:35,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:22:35,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:22:35,806 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 19:22:35,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715952294] [2021-12-17 19:22:35,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:22:35,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:22:35,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:22:35,808 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) [2021-12-17 19:22:35,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 19:22:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:22:35,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 19:22:35,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:22:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:22:35,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 19:22:35,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:22:35,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:22:35,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763088591] [2021-12-17 19:22:35,977 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 19:22:35,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715952294] [2021-12-17 19:22:35,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715952294] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 19:22:35,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 19:22:35,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-12-17 19:22:35,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213113792] [2021-12-17 19:22:35,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 19:22:35,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 19:22:35,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:22:35,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 19:22:35,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 19:22:35,980 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 19:22:36,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:22:36,027 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-12-17 19:22:36,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 19:22:36,028 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-17 19:22:36,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:22:36,028 INFO L225 Difference]: With dead ends: 39 [2021-12-17 19:22:36,030 INFO L226 Difference]: Without dead ends: 34 [2021-12-17 19:22:36,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:22:36,031 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:22:36,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 153 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:22:36,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-17 19:22:36,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-17 19:22:36,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 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) [2021-12-17 19:22:36,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-12-17 19:22:36,038 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 12 [2021-12-17 19:22:36,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:22:36,039 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-12-17 19:22:36,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 19:22:36,040 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-12-17 19:22:36,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-17 19:22:36,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:22:36,041 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:22:36,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 19:22:36,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:22:36,251 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:22:36,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:22:36,251 INFO L85 PathProgramCache]: Analyzing trace with hash -276630798, now seen corresponding path program 2 times [2021-12-17 19:22:36,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:22:36,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872881048] [2021-12-17 19:22:36,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:22:36,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:22:36,257 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 19:22:36,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639447509] [2021-12-17 19:22:36,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 19:22:36,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:22:36,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:22:36,261 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) [2021-12-17 19:22:36,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 19:22:41,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 19:22:41,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 19:22:41,161 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-17 19:22:41,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:23:41,664 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (and (let ((.cse0 (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256))) (or (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod .cse0 |c_ULTIMATE.start_main1_~y~0#1|) 256)) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (+ .cse0 (- 256)) |c_ULTIMATE.start_main1_~y~0#1|) 256)) (< 127 .cse0)))) (<= 0 (+ |v_ULTIMATE.start_gcd_test_~a#1_12| 128)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0) (= 0 (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_main1_~y~0#1|)))) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (not (= 0 |c_ULTIMATE.start_gcd_test_~a#1|))) is different from false [2021-12-17 19:24:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-17 19:24:07,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 19:24:26,904 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse5 (+ |c_ULTIMATE.start_main1_~y~0#1| 256)) (.cse3 (<= 0 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse9 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (and (or (< |c_ULTIMATE.start_gcd_test_~a#1| 0) (let ((.cse4 (mod .cse9 256))) (and (or (let ((.cse0 (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ .cse4 (- 256))) 256)))) (.cse2 (= .cse4 .cse5))) (and (or .cse0 .cse1 .cse2) (or .cse0 .cse3 .cse2))) (<= .cse4 127)) (or (< 127 .cse4) (let ((.cse6 (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse4) 256)))) (.cse7 (= 0 .cse4)) (.cse8 (= .cse4 |c_ULTIMATE.start_main1_~y~0#1|))) (and (or .cse3 .cse6 .cse7 .cse8) (or .cse6 .cse7 .cse1 .cse8))))))) (or (= 0 .cse9) (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (let ((.cse17 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse9) 256))) (let ((.cse12 (or .cse3 (= .cse17 |c_ULTIMATE.start_main1_~y~0#1|) (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse17) 256))) (= 0 .cse17))) (.cse10 (< 127 .cse17)) (.cse13 (<= .cse17 127)) (.cse14 (or .cse3 (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ .cse17 (- 256))) 256))) (= .cse17 .cse5))) (.cse15 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse9) 256))) (and (or (let ((.cse11 (or (= .cse15 .cse5) .cse1 (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ .cse15 (- 256))) 256)))))) (and (or .cse10 (and .cse11 .cse12)) (or .cse13 (and .cse14 .cse11)))) (<= .cse15 127)) (or (let ((.cse16 (or (= 0 .cse15) (= .cse15 |c_ULTIMATE.start_main1_~y~0#1|) .cse1 (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse15) 256)))))) (and (or (and .cse16 .cse12) .cse10) (or .cse13 (and .cse14 .cse16)))) (< 127 .cse15)))))))) is different from true [2021-12-17 19:24:44,404 WARN L227 SmtUtils]: Spent 10.48s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 19:25:22,503 WARN L860 $PredicateComparison]: unable to prove that (or (let ((.cse1 (mod (* |c_ULTIMATE.start_main1_~x~0#1| 255) 256))) (and (let ((.cse0 (mod (mod .cse1 |c_ULTIMATE.start_main1_~y~0#1|) 256))) (or (not (= 0 (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse0) 256))) (< 127 .cse1) (= 0 .cse0))) (let ((.cse2 (mod (+ .cse1 (- 256)) |c_ULTIMATE.start_main1_~y~0#1|))) (or (<= .cse1 127) (not (= 0 (mod (mod |c_ULTIMATE.start_main1_~y~0#1| (+ (mod (+ (* |c_ULTIMATE.start_main1_~y~0#1| 255) .cse2) 256) (- 256))) 256))) (= 0 .cse2))))) (<= |c_ULTIMATE.start_main1_~y~0#1| 0) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (not (= 0 (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|)))) is different from true [2021-12-17 19:26:49,878 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~y~0#1_6| Int) (|v_ULTIMATE.start_main1_~x~0#1_5| Int)) (let ((.cse1 (mod (* |v_ULTIMATE.start_main1_~x~0#1_5| 255) 256))) (let ((.cse0 (mod (mod .cse1 |v_ULTIMATE.start_main1_~y~0#1_6|) 256))) (or (<= |v_ULTIMATE.start_main1_~y~0#1_6| 0) (< (+ |v_ULTIMATE.start_main1_~x~0#1_5| 128) 0) (not (= 0 (mod (mod |v_ULTIMATE.start_main1_~y~0#1_6| .cse0) 256))) (<= 0 |v_ULTIMATE.start_main1_~x~0#1_5|) (= 0 .cse0) (< 127 .cse1) (not (= 0 (mod |v_ULTIMATE.start_main1_~x~0#1_5| |v_ULTIMATE.start_main1_~y~0#1_6|))))))) is different from false [2021-12-17 19:26:51,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-17 19:26:51,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:26:51,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872881048] [2021-12-17 19:26:51,789 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 19:26:51,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639447509] [2021-12-17 19:26:51,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639447509] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 19:26:51,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 19:26:51,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 16 [2021-12-17 19:26:51,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162644830] [2021-12-17 19:26:51,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 19:26:51,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 19:26:51,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:26:51,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 19:26:51,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=121, Unknown=8, NotChecked=72, Total=240 [2021-12-17 19:26:51,791 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 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) [2021-12-17 19:26:53,081 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 19:27:41,208 WARN L227 SmtUtils]: Spent 42.74s on a formula simplification. DAG size of input: 44 DAG size of output: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 19:29:24,650 WARN L227 SmtUtils]: Spent 1.56m on a formula simplification. DAG size of input: 111 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 19:29:26,396 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 19:30:25,381 WARN L227 SmtUtils]: Spent 49.76s on a formula simplification. DAG size of input: 83 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 19:30:38,439 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse5 (+ |c_ULTIMATE.start_main1_~y~0#1| 256)) (.cse3 (<= 0 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse9 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (and (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (or (< |c_ULTIMATE.start_gcd_test_~a#1| 0) (let ((.cse4 (mod .cse9 256))) (and (or (let ((.cse0 (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ .cse4 (- 256))) 256)))) (.cse2 (= .cse4 .cse5))) (and (or .cse0 .cse1 .cse2) (or .cse0 .cse3 .cse2))) (<= .cse4 127)) (or (< 127 .cse4) (let ((.cse6 (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse4) 256)))) (.cse7 (= 0 .cse4)) (.cse8 (= .cse4 |c_ULTIMATE.start_main1_~y~0#1|))) (and (or .cse3 .cse6 .cse7 .cse8) (or .cse6 .cse7 .cse1 .cse8))))))) (or (= 0 .cse9) (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (let ((.cse17 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse9) 256))) (let ((.cse12 (or .cse3 (= .cse17 |c_ULTIMATE.start_main1_~y~0#1|) (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse17) 256))) (= 0 .cse17))) (.cse10 (< 127 .cse17)) (.cse13 (<= .cse17 127)) (.cse14 (or .cse3 (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ .cse17 (- 256))) 256))) (= .cse17 .cse5))) (.cse15 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse9) 256))) (and (or (let ((.cse11 (or (= .cse15 .cse5) .cse1 (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ .cse15 (- 256))) 256)))))) (and (or .cse10 (and .cse11 .cse12)) (or .cse13 (and .cse14 .cse11)))) (<= .cse15 127)) (or (let ((.cse16 (or (= 0 .cse15) (= .cse15 |c_ULTIMATE.start_main1_~y~0#1|) .cse1 (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse15) 256)))))) (and (or (and .cse16 .cse12) .cse10) (or .cse13 (and .cse14 .cse16)))) (< 127 .cse15)))))) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (= |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_main1_~y~0#1|) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (and (let ((.cse18 (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256))) (or (and (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) .cse18) (< 127 .cse18)) (and (= |c_ULTIMATE.start_gcd_test_~a#1| .cse18) (<= .cse18 127)))) (<= 0 (+ |v_ULTIMATE.start_gcd_test_~a#1_12| 128)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0) (= 0 (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_main1_~y~0#1|)))))) is different from false [2021-12-17 19:31:18,933 WARN L227 SmtUtils]: Spent 35.73s on a formula simplification. DAG size of input: 43 DAG size of output: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 19:31:20,939 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (or (= |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_main1_~y~0#1|) (< 127 |c_ULTIMATE.start_gcd_test_~a#1|) (not (= 0 |c_ULTIMATE.start_gcd_test_~b#1|)) (< (+ |c_ULTIMATE.start_gcd_test_~a#1| 128) 0)) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (and (let ((.cse0 (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256))) (or (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod .cse0 |c_ULTIMATE.start_main1_~y~0#1|) 256)) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (+ .cse0 (- 256)) |c_ULTIMATE.start_main1_~y~0#1|) 256)) (< 127 .cse0)))) (<= 0 (+ |v_ULTIMATE.start_gcd_test_~a#1_12| 128)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0) (= 0 (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_main1_~y~0#1|)))) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (not (= 0 |c_ULTIMATE.start_gcd_test_~a#1|))) is different from false [2021-12-17 19:31:23,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:31:23,856 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-12-17 19:31:23,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 19:31:23,856 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 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 [2021-12-17 19:31:23,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:31:23,857 INFO L225 Difference]: With dead ends: 47 [2021-12-17 19:31:23,857 INFO L226 Difference]: Without dead ends: 39 [2021-12-17 19:31:23,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 305.9s TimeCoverageRelationStatistics Valid=97, Invalid=322, Unknown=21, NotChecked=210, Total=650 [2021-12-17 19:31:23,858 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-17 19:31:23,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 277 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 36 Invalid, 0 Unknown, 95 Unchecked, 4.4s Time] [2021-12-17 19:31:23,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-17 19:31:23,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2021-12-17 19:31:23,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 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) [2021-12-17 19:31:23,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-12-17 19:31:23,862 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 13 [2021-12-17 19:31:23,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:31:23,862 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-12-17 19:31:23,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 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) [2021-12-17 19:31:23,862 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-12-17 19:31:23,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-17 19:31:23,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:31:23,863 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:31:23,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-17 19:31:24,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:31:24,067 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:31:24,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:31:24,068 INFO L85 PathProgramCache]: Analyzing trace with hash 66034544, now seen corresponding path program 3 times [2021-12-17 19:31:24,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:31:24,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016606323] [2021-12-17 19:31:24,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:31:24,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:31:24,073 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 19:31:24,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009335828] [2021-12-17 19:31:24,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 19:31:24,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:31:24,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:31:24,075 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) [2021-12-17 19:31:24,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 19:31:26,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 19:31:26,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 19:31:26,543 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-17 19:31:26,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:34:23,098 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_19| Int) (|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (and (< |v_ULTIMATE.start_gcd_test_~a#1_19| 0) (<= 0 (+ |v_ULTIMATE.start_gcd_test_~a#1_19| 128)) (= 0 (mod |v_ULTIMATE.start_gcd_test_~a#1_19| |v_ULTIMATE.start_gcd_test_~a#1_21|)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_19| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_21|) 256)) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_21|) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_21| |c_ULTIMATE.start_gcd_test_~a#1|) 256)))) (not (= 0 |c_ULTIMATE.start_gcd_test_~a#1|))) is different from false [2021-12-17 19:36:02,647 WARN L838 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_19| Int) (|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (let ((.cse1 (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_19| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_21|) 256))) (let ((.cse0 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_21| .cse1) 256))) (and (not (= 0 .cse0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse1 .cse0) 256)) (< |v_ULTIMATE.start_gcd_test_~a#1_19| 0) (<= 0 (+ |v_ULTIMATE.start_gcd_test_~a#1_19| 128)) (not (= 0 .cse1)) (= 0 (mod |v_ULTIMATE.start_gcd_test_~a#1_19| |v_ULTIMATE.start_gcd_test_~a#1_21|)) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse0) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_21|))))) is different from false [2021-12-17 19:37:09,953 WARN L838 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_19| Int) (|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (let ((.cse1 (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_19| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_21|) 256))) (let ((.cse0 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_21| .cse1) 256))) (and (not (= 0 .cse0)) (< |v_ULTIMATE.start_gcd_test_~a#1_19| 0) (<= 0 (+ |v_ULTIMATE.start_gcd_test_~a#1_19| 128)) (not (= 0 .cse1)) (= 0 (mod (mod .cse1 .cse0) 256)) (= 0 (mod |v_ULTIMATE.start_gcd_test_~a#1_19| |v_ULTIMATE.start_gcd_test_~a#1_21|)) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse0) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_21|))))) is different from false Killed by 15