./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_2+newton_2_8.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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_2+newton_2_8.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 3c398287975b44a672accc5dcc25b28e536e19f2a0478c0e2a0b4b73bd7a8e18 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 20:20:33,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 20:20:33,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 20:20:33,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 20:20:33,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 20:20:33,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 20:20:33,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 20:20:33,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 20:20:33,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 20:20:33,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 20:20:33,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 20:20:33,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 20:20:33,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 20:20:33,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 20:20:33,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 20:20:33,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 20:20:33,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 20:20:33,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 20:20:33,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 20:20:33,553 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 20:20:33,556 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 20:20:33,557 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 20:20:33,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 20:20:33,558 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 20:20:33,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 20:20:33,567 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 20:20:33,568 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 20:20:33,568 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 20:20:33,569 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 20:20:33,570 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 20:20:33,571 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 20:20:33,571 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 20:20:33,573 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 20:20:33,573 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 20:20:33,574 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 20:20:33,575 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 20:20:33,575 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 20:20:33,576 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 20:20:33,576 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 20:20:33,577 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 20:20:33,578 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 20:20:33,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 20:20:33,581 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 20:20:33,617 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 20:20:33,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 20:20:33,618 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 20:20:33,618 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 20:20:33,619 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 20:20:33,619 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 20:20:33,620 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 20:20:33,620 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 20:20:33,620 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 20:20:33,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 20:20:33,621 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 20:20:33,622 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 20:20:33,622 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 20:20:33,622 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 20:20:33,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 20:20:33,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 20:20:33,623 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 20:20:33,623 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 20:20:33,623 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 20:20:33,624 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 20:20:33,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 20:20:33,624 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 20:20:33,625 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 20:20:33,625 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 20:20:33,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 20:20:33,625 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 20:20:33,625 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 20:20:33,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 20:20:33,626 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 20:20:33,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 20:20:33,626 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 20:20:33,626 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 20:20:33,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 20:20:33,627 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c398287975b44a672accc5dcc25b28e536e19f2a0478c0e2a0b4b73bd7a8e18 [2022-07-13 20:20:33,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 20:20:33,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 20:20:33,889 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 20:20:33,889 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 20:20:33,890 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 20:20:33,891 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_2+newton_2_8.i [2022-07-13 20:20:33,944 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/816be99f3/8818190922e64e078d52737f834fc8ea/FLAG4812b3f7b [2022-07-13 20:20:34,379 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 20:20:34,380 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_2+newton_2_8.i [2022-07-13 20:20:34,389 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/816be99f3/8818190922e64e078d52737f834fc8ea/FLAG4812b3f7b [2022-07-13 20:20:34,772 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/816be99f3/8818190922e64e078d52737f834fc8ea [2022-07-13 20:20:34,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 20:20:34,775 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 20:20:34,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 20:20:34,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 20:20:34,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 20:20:34,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 08:20:34" (1/1) ... [2022-07-13 20:20:34,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bce6731 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:20:34, skipping insertion in model container [2022-07-13 20:20:34,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 08:20:34" (1/1) ... [2022-07-13 20:20:34,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 20:20:34,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 20:20:34,967 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_2+newton_2_8.i[1226,1239] [2022-07-13 20:20:34,987 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_2+newton_2_8.i[2841,2854] [2022-07-13 20:20:34,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 20:20:34,994 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 20:20:35,003 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_2+newton_2_8.i[1226,1239] [2022-07-13 20:20:35,012 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_2+newton_2_8.i[2841,2854] [2022-07-13 20:20:35,013 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 20:20:35,024 INFO L208 MainTranslator]: Completed translation [2022-07-13 20:20:35,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:20:35 WrapperNode [2022-07-13 20:20:35,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 20:20:35,026 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 20:20:35,026 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 20:20:35,026 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 20:20:35,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:20:35" (1/1) ... [2022-07-13 20:20:35,038 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:20:35" (1/1) ... [2022-07-13 20:20:35,054 INFO L137 Inliner]: procedures = 27, calls = 16, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 77 [2022-07-13 20:20:35,055 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 20:20:35,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 20:20:35,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 20:20:35,056 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 20:20:35,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:20:35" (1/1) ... [2022-07-13 20:20:35,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:20:35" (1/1) ... [2022-07-13 20:20:35,064 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:20:35" (1/1) ... [2022-07-13 20:20:35,064 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:20:35" (1/1) ... [2022-07-13 20:20:35,068 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:20:35" (1/1) ... [2022-07-13 20:20:35,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:20:35" (1/1) ... [2022-07-13 20:20:35,076 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:20:35" (1/1) ... [2022-07-13 20:20:35,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 20:20:35,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 20:20:35,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 20:20:35,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 20:20:35,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:20:35" (1/1) ... [2022-07-13 20:20:35,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 20:20:35,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:20:35,112 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) [2022-07-13 20:20:35,135 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 [2022-07-13 20:20:35,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 20:20:35,156 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-07-13 20:20:35,156 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-07-13 20:20:35,156 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-07-13 20:20:35,158 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-07-13 20:20:35,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 20:20:35,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 20:20:35,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 20:20:35,219 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 20:20:35,221 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 20:20:35,418 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 20:20:35,424 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 20:20:35,424 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 20:20:35,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:20:35 BoogieIcfgContainer [2022-07-13 20:20:35,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 20:20:35,427 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 20:20:35,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 20:20:35,430 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 20:20:35,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 08:20:34" (1/3) ... [2022-07-13 20:20:35,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df62f86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:20:35, skipping insertion in model container [2022-07-13 20:20:35,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:20:35" (2/3) ... [2022-07-13 20:20:35,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df62f86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:20:35, skipping insertion in model container [2022-07-13 20:20:35,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:20:35" (3/3) ... [2022-07-13 20:20:35,433 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_2+newton_2_8.i [2022-07-13 20:20:35,445 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 20:20:35,445 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-13 20:20:35,488 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 20:20:35,499 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4963a34, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@737d2279 [2022-07-13 20:20:35,501 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 20:20:35,506 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) [2022-07-13 20:20:35,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 20:20:35,516 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:20:35,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:20:35,517 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:20:35,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:20:35,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2022-07-13 20:20:35,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:20:35,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702156879] [2022-07-13 20:20:35,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:20:35,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:20:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:20:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:20:35,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:20:35,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702156879] [2022-07-13 20:20:35,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702156879] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:20:35,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:20:35,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 20:20:35,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537818748] [2022-07-13 20:20:35,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:20:35,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 20:20:35,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:20:35,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 20:20:35,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 20:20:35,796 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) [2022-07-13 20:20:35,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:20:35,894 INFO L93 Difference]: Finished difference Result 90 states and 111 transitions. [2022-07-13 20:20:35,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 20:20:35,897 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 [2022-07-13 20:20:35,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:20:35,908 INFO L225 Difference]: With dead ends: 90 [2022-07-13 20:20:35,908 INFO L226 Difference]: Without dead ends: 36 [2022-07-13 20:20:35,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 20:20:35,916 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 29 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:20:35,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 107 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:20:35,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-13 20:20:35,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2022-07-13 20:20:35,955 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) [2022-07-13 20:20:35,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-07-13 20:20:35,959 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 11 [2022-07-13 20:20:35,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:20:35,959 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-07-13 20:20:35,960 INFO L496 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) [2022-07-13 20:20:35,960 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-07-13 20:20:35,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 20:20:35,962 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:20:35,962 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:20:35,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 20:20:35,963 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:20:35,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:20:35,965 INFO L85 PathProgramCache]: Analyzing trace with hash 65622039, now seen corresponding path program 1 times [2022-07-13 20:20:35,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:20:35,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828054037] [2022-07-13 20:20:35,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:20:35,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:20:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:20:36,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:20:36,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:20:36,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828054037] [2022-07-13 20:20:36,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828054037] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:20:36,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:20:36,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 20:20:36,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526035617] [2022-07-13 20:20:36,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:20:36,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 20:20:36,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:20:36,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 20:20:36,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 20:20:36,015 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. 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) [2022-07-13 20:20:36,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:20:36,041 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-07-13 20:20:36,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 20:20:36,042 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 [2022-07-13 20:20:36,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:20:36,043 INFO L225 Difference]: With dead ends: 36 [2022-07-13 20:20:36,043 INFO L226 Difference]: Without dead ends: 30 [2022-07-13 20:20:36,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 20:20:36,045 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:20:36,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 82 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:20:36,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-13 20:20:36,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-13 20:20:36,053 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) [2022-07-13 20:20:36,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-07-13 20:20:36,054 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2022-07-13 20:20:36,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:20:36,055 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-07-13 20:20:36,055 INFO L496 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) [2022-07-13 20:20:36,055 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-07-13 20:20:36,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-13 20:20:36,056 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:20:36,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:20:36,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 20:20:36,057 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:20:36,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:20:36,057 INFO L85 PathProgramCache]: Analyzing trace with hash -659390950, now seen corresponding path program 1 times [2022-07-13 20:20:36,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:20:36,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784771025] [2022-07-13 20:20:36,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:20:36,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:20:36,070 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 20:20:36,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924253459] [2022-07-13 20:20:36,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:20:36,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:20:36,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:20:36,073 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) [2022-07-13 20:20:36,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 20:20:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:20:36,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 20:20:36,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:20:36,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:20:36,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 20:20:36,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:20:36,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:20:36,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784771025] [2022-07-13 20:20:36,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 20:20:36,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924253459] [2022-07-13 20:20:36,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924253459] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 20:20:36,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 20:20:36,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-07-13 20:20:36,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48335324] [2022-07-13 20:20:36,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 20:20:36,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 20:20:36,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:20:36,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 20:20:36,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 20:20:36,275 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:20:36,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:20:36,346 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2022-07-13 20:20:36,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 20:20:36,347 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-13 20:20:36,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:20:36,347 INFO L225 Difference]: With dead ends: 37 [2022-07-13 20:20:36,348 INFO L226 Difference]: Without dead ends: 31 [2022-07-13 20:20:36,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-13 20:20:36,349 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:20:36,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 153 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:20:36,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-13 20:20:36,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-13 20:20:36,353 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) [2022-07-13 20:20:36,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-07-13 20:20:36,354 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 12 [2022-07-13 20:20:36,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:20:36,355 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-07-13 20:20:36,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:20:36,355 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-07-13 20:20:36,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-13 20:20:36,356 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:20:36,356 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:20:36,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 20:20:36,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:20:36,579 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:20:36,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:20:36,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1659957129, now seen corresponding path program 2 times [2022-07-13 20:20:36,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:20:36,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432630277] [2022-07-13 20:20:36,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:20:36,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:20:36,590 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 20:20:36,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449410388] [2022-07-13 20:20:36,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 20:20:36,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:20:36,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:20:36,593 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) [2022-07-13 20:20:36,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 20:20:36,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 20:20:36,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 20:20:36,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-13 20:20:36,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:23:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:23:38,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 20:24:10,468 WARN L855 $PredicateComparison]: unable to prove that (or (<= |c_ULTIMATE.start_main1_~y~0#1| 0) (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (or (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (and (forall ((|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse0 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (or (<= (mod .cse0 256) 127) (let ((.cse3 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse2 (not (< |ULTIMATE.start_gcd_test_~a#1| 0)))) (and (let ((.cse1 (mod (+ .cse0 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (or (not (<= .cse1 127)) (<= .cse1 |c_ULTIMATE.start_main1_~y~0#1|) .cse2 .cse3 (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse1) 256) 0)))) (let ((.cse4 (mod (+ .cse0 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (or (<= .cse4 |c_ULTIMATE.start_main1_~y~0#1|) (not .cse3) .cse2 (not (<= .cse4 127)) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse4) 256) 0))))))))) (forall ((|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse11 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse5 (mod .cse11 256))) (or (let ((.cse6 (< |ULTIMATE.start_gcd_test_~a#1| 0))) (let ((.cse9 (not .cse6)) (.cse8 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse10 (= .cse11 0))) (and (or (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse5) 256) 0)) .cse6 (<= .cse5 |c_ULTIMATE.start_main1_~y~0#1|)) (let ((.cse7 (mod (+ .cse11 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (or (<= .cse7 |c_ULTIMATE.start_main1_~y~0#1|) (not .cse8) .cse9 (not (<= .cse7 127)) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse7) 256) 0)) .cse10)) (let ((.cse12 (mod (+ .cse11 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (or (not (<= .cse12 127)) (<= .cse12 |c_ULTIMATE.start_main1_~y~0#1|) .cse9 .cse8 (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse12) 256) 0)) .cse10))))) (not (<= .cse5 127))))))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) is different from true [2022-07-13 20:24:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-13 20:24:26,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:24:26,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432630277] [2022-07-13 20:24:26,933 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 20:24:26,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449410388] [2022-07-13 20:24:26,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449410388] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 20:24:26,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 20:24:26,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-07-13 20:24:26,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210517670] [2022-07-13 20:24:26,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 20:24:26,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 20:24:26,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:24:26,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 20:24:26,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=192, Unknown=6, NotChecked=28, Total=272 [2022-07-13 20:24:26,937 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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) [2022-07-13 20:24:29,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:24:29,774 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2022-07-13 20:24:29,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 20:24:29,775 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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 [2022-07-13 20:24:29,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:24:29,775 INFO L225 Difference]: With dead ends: 40 [2022-07-13 20:24:29,776 INFO L226 Difference]: Without dead ends: 34 [2022-07-13 20:24:29,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=68, Invalid=272, Unknown=6, NotChecked=34, Total=380 [2022-07-13 20:24:29,777 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 20:24:29,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 185 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-07-13 20:24:29,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-13 20:24:29,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-07-13 20:24:29,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 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) [2022-07-13 20:24:29,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-07-13 20:24:29,782 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 13 [2022-07-13 20:24:29,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:24:29,783 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-07-13 20:24:29,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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) [2022-07-13 20:24:29,783 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-07-13 20:24:29,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-13 20:24:29,784 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:24:29,784 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:24:29,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 20:24:29,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-13 20:24:29,985 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:24:29,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:24:29,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1682229690, now seen corresponding path program 3 times [2022-07-13 20:24:29,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:24:29,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007506939] [2022-07-13 20:24:29,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:24:29,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:24:29,995 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 20:24:29,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539482717] [2022-07-13 20:24:29,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 20:24:29,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:24:29,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:24:29,997 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) [2022-07-13 20:24:29,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 20:24:30,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 20:24:30,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 20:24:30,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-13 20:24:30,065 INFO L286 TraceCheckSpWp]: Computing forward predicates...