./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_2+newton_2_6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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_6.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 16f616cbb154d125e085ac05764879da22cdfe3693ed1f1a6c28186441fe892d --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 07:18:43,461 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 07:18:43,463 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 07:18:43,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 07:18:43,494 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 07:18:43,495 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 07:18:43,498 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 07:18:43,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 07:18:43,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 07:18:43,507 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 07:18:43,508 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 07:18:43,509 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 07:18:43,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 07:18:43,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 07:18:43,510 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 07:18:43,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 07:18:43,515 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 07:18:43,516 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 07:18:43,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 07:18:43,521 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 07:18:43,522 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 07:18:43,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 07:18:43,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 07:18:43,525 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 07:18:43,527 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 07:18:43,530 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 07:18:43,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 07:18:43,532 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 07:18:43,533 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 07:18:43,533 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 07:18:43,534 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 07:18:43,534 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 07:18:43,535 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 07:18:43,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 07:18:43,537 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 07:18:43,537 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 07:18:43,537 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 07:18:43,538 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 07:18:43,538 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 07:18:43,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 07:18:43,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 07:18:43,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 07:18:43,544 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 07:18:43,563 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 07:18:43,564 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 07:18:43,564 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 07:18:43,564 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 07:18:43,565 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 07:18:43,565 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 07:18:43,565 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 07:18:43,566 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 07:18:43,566 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 07:18:43,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 07:18:43,575 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 07:18:43,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 07:18:43,576 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 07:18:43,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 07:18:43,576 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 07:18:43,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 07:18:43,576 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 07:18:43,577 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 07:18:43,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 07:18:43,577 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 07:18:43,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 07:18:43,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 07:18:43,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 07:18:43,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 07:18:43,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 07:18:43,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 07:18:43,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 07:18:43,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 07:18:43,579 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 07:18:43,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 07:18:43,579 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 07:18:43,579 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 07:18:43,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 07:18:43,579 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16f616cbb154d125e085ac05764879da22cdfe3693ed1f1a6c28186441fe892d [2022-07-21 07:18:43,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 07:18:43,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 07:18:43,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 07:18:43,861 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 07:18:43,862 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 07:18:43,863 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_2+newton_2_6.i [2022-07-21 07:18:43,914 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b500173e/faaec86b905549f09727fb4a9e762619/FLAGbb3284add [2022-07-21 07:18:44,239 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 07:18:44,239 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_2+newton_2_6.i [2022-07-21 07:18:44,243 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b500173e/faaec86b905549f09727fb4a9e762619/FLAGbb3284add [2022-07-21 07:18:44,687 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b500173e/faaec86b905549f09727fb4a9e762619 [2022-07-21 07:18:44,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 07:18:44,702 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 07:18:44,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 07:18:44,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 07:18:44,706 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 07:18:44,707 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:18:44" (1/1) ... [2022-07-21 07:18:44,708 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25904f3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:18:44, skipping insertion in model container [2022-07-21 07:18:44,708 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:18:44" (1/1) ... [2022-07-21 07:18:44,713 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 07:18:44,729 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 07:18:44,808 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_6.i[1226,1239] [2022-07-21 07:18:44,822 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_6.i[2841,2854] [2022-07-21 07:18:44,823 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 07:18:44,827 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 07:18:44,838 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_6.i[1226,1239] [2022-07-21 07:18:44,848 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_6.i[2841,2854] [2022-07-21 07:18:44,853 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 07:18:44,902 INFO L208 MainTranslator]: Completed translation [2022-07-21 07:18:44,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:18:44 WrapperNode [2022-07-21 07:18:44,902 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 07:18:44,903 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 07:18:44,903 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 07:18:44,903 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 07:18:44,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:18:44" (1/1) ... [2022-07-21 07:18:44,912 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:18:44" (1/1) ... [2022-07-21 07:18:44,924 INFO L137 Inliner]: procedures = 27, calls = 16, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 77 [2022-07-21 07:18:44,925 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 07:18:44,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 07:18:44,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 07:18:44,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 07:18:44,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:18:44" (1/1) ... [2022-07-21 07:18:44,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:18:44" (1/1) ... [2022-07-21 07:18:44,934 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:18:44" (1/1) ... [2022-07-21 07:18:44,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:18:44" (1/1) ... [2022-07-21 07:18:44,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:18:44" (1/1) ... [2022-07-21 07:18:44,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:18:44" (1/1) ... [2022-07-21 07:18:44,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:18:44" (1/1) ... [2022-07-21 07:18:44,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 07:18:44,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 07:18:44,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 07:18:44,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 07:18:44,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:18:44" (1/1) ... [2022-07-21 07:18:44,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 07:18:44,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 07:18:44,984 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) [2022-07-21 07:18:45,011 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 [2022-07-21 07:18:45,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 07:18:45,013 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-07-21 07:18:45,013 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-07-21 07:18:45,013 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-07-21 07:18:45,014 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-07-21 07:18:45,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 07:18:45,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 07:18:45,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 07:18:45,075 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 07:18:45,077 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 07:18:45,252 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 07:18:45,257 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 07:18:45,257 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 07:18:45,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:18:45 BoogieIcfgContainer [2022-07-21 07:18:45,259 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 07:18:45,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 07:18:45,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 07:18:45,262 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 07:18:45,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:18:44" (1/3) ... [2022-07-21 07:18:45,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3142b609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:18:45, skipping insertion in model container [2022-07-21 07:18:45,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:18:44" (2/3) ... [2022-07-21 07:18:45,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3142b609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:18:45, skipping insertion in model container [2022-07-21 07:18:45,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:18:45" (3/3) ... [2022-07-21 07:18:45,264 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_2+newton_2_6.i [2022-07-21 07:18:45,281 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 07:18:45,281 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-21 07:18:45,318 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 07:18:45,325 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@67cb4288, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6a6bbb4f [2022-07-21 07:18:45,326 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 07:18:45,336 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) [2022-07-21 07:18:45,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 07:18:45,342 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:18:45,342 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:18:45,343 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:18:45,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:18:45,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2022-07-21 07:18:45,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:18:45,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689687763] [2022-07-21 07:18:45,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:18:45,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:18:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:18:45,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:18:45,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:18:45,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689687763] [2022-07-21 07:18:45,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689687763] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:18:45,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:18:45,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 07:18:45,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441325541] [2022-07-21 07:18:45,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:18:45,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 07:18:45,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:18:45,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 07:18:45,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 07:18:45,555 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) [2022-07-21 07:18:45,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:18:45,612 INFO L93 Difference]: Finished difference Result 90 states and 111 transitions. [2022-07-21 07:18:45,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 07:18:45,627 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 [2022-07-21 07:18:45,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:18:45,631 INFO L225 Difference]: With dead ends: 90 [2022-07-21 07:18:45,632 INFO L226 Difference]: Without dead ends: 36 [2022-07-21 07:18:45,634 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 [2022-07-21 07:18:45,636 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 [2022-07-21 07:18:45,637 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] [2022-07-21 07:18:45,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-21 07:18:45,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2022-07-21 07:18:45,658 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) [2022-07-21 07:18:45,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-07-21 07:18:45,660 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 11 [2022-07-21 07:18:45,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:18:45,663 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-07-21 07:18:45,663 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) [2022-07-21 07:18:45,663 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-07-21 07:18:45,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 07:18:45,665 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:18:45,665 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:18:45,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 07:18:45,666 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:18:45,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:18:45,667 INFO L85 PathProgramCache]: Analyzing trace with hash 65622039, now seen corresponding path program 1 times [2022-07-21 07:18:45,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:18:45,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843555429] [2022-07-21 07:18:45,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:18:45,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:18:45,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:18:45,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:18:45,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:18:45,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843555429] [2022-07-21 07:18:45,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843555429] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:18:45,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:18:45,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 07:18:45,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862852226] [2022-07-21 07:18:45,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:18:45,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 07:18:45,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:18:45,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 07:18:45,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 07:18:45,712 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) [2022-07-21 07:18:45,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:18:45,732 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-07-21 07:18:45,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 07:18:45,733 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 [2022-07-21 07:18:45,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:18:45,734 INFO L225 Difference]: With dead ends: 36 [2022-07-21 07:18:45,734 INFO L226 Difference]: Without dead ends: 30 [2022-07-21 07:18:45,734 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 [2022-07-21 07:18:45,735 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 [2022-07-21 07:18:45,735 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] [2022-07-21 07:18:45,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-21 07:18:45,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-21 07:18:45,739 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) [2022-07-21 07:18:45,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-07-21 07:18:45,740 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2022-07-21 07:18:45,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:18:45,740 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-07-21 07:18:45,740 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) [2022-07-21 07:18:45,741 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-07-21 07:18:45,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 07:18:45,741 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:18:45,741 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:18:45,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 07:18:45,742 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:18:45,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:18:45,742 INFO L85 PathProgramCache]: Analyzing trace with hash -659390950, now seen corresponding path program 1 times [2022-07-21 07:18:45,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:18:45,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852721671] [2022-07-21 07:18:45,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:18:45,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:18:45,764 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 07:18:45,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449371447] [2022-07-21 07:18:45,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:18:45,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 07:18:45,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 07:18:45,766 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) [2022-07-21 07:18:45,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 07:18:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:18:45,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 07:18:45,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 07:18:45,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:18:45,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 07:18:45,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:18:45,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:18:45,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852721671] [2022-07-21 07:18:45,942 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 07:18:45,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449371447] [2022-07-21 07:18:45,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449371447] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 07:18:45,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 07:18:45,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-07-21 07:18:45,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027142989] [2022-07-21 07:18:45,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 07:18:45,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 07:18:45,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:18:45,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 07:18:45,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 07:18:45,948 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) [2022-07-21 07:18:46,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:18:46,018 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2022-07-21 07:18:46,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 07:18:46,019 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 [2022-07-21 07:18:46,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:18:46,019 INFO L225 Difference]: With dead ends: 37 [2022-07-21 07:18:46,029 INFO L226 Difference]: Without dead ends: 31 [2022-07-21 07:18:46,030 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 [2022-07-21 07:18:46,031 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 [2022-07-21 07:18:46,031 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] [2022-07-21 07:18:46,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-21 07:18:46,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-21 07:18:46,036 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) [2022-07-21 07:18:46,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-07-21 07:18:46,038 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 12 [2022-07-21 07:18:46,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:18:46,039 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-07-21 07:18:46,039 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) [2022-07-21 07:18:46,039 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-07-21 07:18:46,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 07:18:46,040 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:18:46,040 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:18:46,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 07:18:46,250 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 [2022-07-21 07:18:46,250 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:18:46,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:18:46,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1659957129, now seen corresponding path program 2 times [2022-07-21 07:18:46,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:18:46,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930996388] [2022-07-21 07:18:46,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:18:46,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:18:46,258 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 07:18:46,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034605908] [2022-07-21 07:18:46,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 07:18:46,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 07:18:46,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 07:18:46,266 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) [2022-07-21 07:18:46,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 07:18:46,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 07:18:46,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 07:18:46,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 07:18:46,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 07:21:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:21:54,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 07:22:38,872 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 [2022-07-21 07:22:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-21 07:22:52,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:22:52,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930996388] [2022-07-21 07:22:52,119 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 07:22:52,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034605908] [2022-07-21 07:22:52,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034605908] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 07:22:52,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 07:22:52,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-07-21 07:22:52,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462811919] [2022-07-21 07:22:52,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 07:22:52,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 07:22:52,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:22:52,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 07:22:52,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=184, Unknown=14, NotChecked=28, Total=272 [2022-07-21 07:22:52,121 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) [2022-07-21 07:22:55,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:22:55,115 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2022-07-21 07:22:55,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 07:22:55,116 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 [2022-07-21 07:22:55,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:22:55,117 INFO L225 Difference]: With dead ends: 40 [2022-07-21 07:22:55,117 INFO L226 Difference]: Without dead ends: 34 [2022-07-21 07:22:55,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 38.0s TimeCoverageRelationStatistics Valid=68, Invalid=264, Unknown=14, NotChecked=34, Total=380 [2022-07-21 07:22:55,118 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 [2022-07-21 07:22:55,119 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] [2022-07-21 07:22:55,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-21 07:22:55,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-07-21 07:22:55,122 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) [2022-07-21 07:22:55,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-07-21 07:22:55,123 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 13 [2022-07-21 07:22:55,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:22:55,123 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-07-21 07:22:55,123 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) [2022-07-21 07:22:55,123 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-07-21 07:22:55,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 07:22:55,124 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:22:55,124 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:22:55,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 07:22:55,327 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 [2022-07-21 07:22:55,330 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:22:55,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:22:55,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1682229690, now seen corresponding path program 3 times [2022-07-21 07:22:55,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:22:55,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529723281] [2022-07-21 07:22:55,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:22:55,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:22:55,344 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 07:22:55,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1571742125] [2022-07-21 07:22:55,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 07:22:55,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 07:22:55,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 07:22:55,352 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) [2022-07-21 07:22:55,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 07:22:55,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 07:22:55,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 07:22:55,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-21 07:22:55,410 INFO L286 TraceCheckSpWp]: Computing forward predicates...