./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 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/nla-digbench-scaling/fermat1-ll_unwindbound20.c -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 2dec1b2e3c1461164aa09bac8cca047a14ba0fda75d53737804411255b62653a --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 11:47:38,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 11:47:38,759 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 11:47:38,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 11:47:38,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 11:47:38,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 11:47:38,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 11:47:38,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 11:47:38,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 11:47:38,801 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 11:47:38,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 11:47:38,804 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 11:47:38,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 11:47:38,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 11:47:38,807 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 11:47:38,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 11:47:38,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 11:47:38,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 11:47:38,810 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 11:47:38,814 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 11:47:38,815 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 11:47:38,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 11:47:38,816 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 11:47:38,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 11:47:38,823 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 11:47:38,823 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 11:47:38,823 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 11:47:38,824 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 11:47:38,824 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 11:47:38,825 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 11:47:38,825 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 11:47:38,826 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 11:47:38,827 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 11:47:38,828 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 11:47:38,829 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 11:47:38,829 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 11:47:38,829 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 11:47:38,830 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 11:47:38,830 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 11:47:38,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 11:47:38,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 11:47:38,832 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 11:47:38,854 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 11:47:38,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 11:47:38,854 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 11:47:38,855 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 11:47:38,855 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 11:47:38,855 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 11:47:38,856 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 11:47:38,856 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 11:47:38,856 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 11:47:38,856 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 11:47:38,857 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 11:47:38,857 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 11:47:38,857 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 11:47:38,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 11:47:38,858 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 11:47:38,858 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 11:47:38,858 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 11:47:38,858 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 11:47:38,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 11:47:38,858 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 11:47:38,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 11:47:38,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 11:47:38,859 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 11:47:38,859 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 11:47:38,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:47:38,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 11:47:38,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 11:47:38,859 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 11:47:38,860 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 11:47:38,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 11:47:38,860 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 11:47:38,860 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 11:47:38,860 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 11:47:38,860 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 11:47:38,860 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 11:47:38,861 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2dec1b2e3c1461164aa09bac8cca047a14ba0fda75d53737804411255b62653a [2023-02-15 11:47:39,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 11:47:39,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 11:47:39,067 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 11:47:39,068 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 11:47:39,068 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 11:47:39,069 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.c [2023-02-15 11:47:40,102 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 11:47:40,241 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 11:47:40,241 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.c [2023-02-15 11:47:40,245 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/609d11af1/e1b2f22121cf4fc7aa91d63f006dab3f/FLAG03a783e2c [2023-02-15 11:47:40,254 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/609d11af1/e1b2f22121cf4fc7aa91d63f006dab3f [2023-02-15 11:47:40,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 11:47:40,257 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 11:47:40,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 11:47:40,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 11:47:40,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 11:47:40,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:47:40" (1/1) ... [2023-02-15 11:47:40,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dd74b7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:47:40, skipping insertion in model container [2023-02-15 11:47:40,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:47:40" (1/1) ... [2023-02-15 11:47:40,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 11:47:40,276 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 11:47:40,360 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.c[535,548] [2023-02-15 11:47:40,372 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:47:40,378 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 11:47:40,385 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.c[535,548] [2023-02-15 11:47:40,391 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:47:40,399 INFO L208 MainTranslator]: Completed translation [2023-02-15 11:47:40,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:47:40 WrapperNode [2023-02-15 11:47:40,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 11:47:40,401 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 11:47:40,401 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 11:47:40,401 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 11:47:40,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:47:40" (1/1) ... [2023-02-15 11:47:40,410 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:47:40" (1/1) ... [2023-02-15 11:47:40,421 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2023-02-15 11:47:40,422 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 11:47:40,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 11:47:40,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 11:47:40,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 11:47:40,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:47:40" (1/1) ... [2023-02-15 11:47:40,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:47:40" (1/1) ... [2023-02-15 11:47:40,430 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:47:40" (1/1) ... [2023-02-15 11:47:40,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:47:40" (1/1) ... [2023-02-15 11:47:40,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:47:40" (1/1) ... [2023-02-15 11:47:40,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:47:40" (1/1) ... [2023-02-15 11:47:40,435 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:47:40" (1/1) ... [2023-02-15 11:47:40,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:47:40" (1/1) ... [2023-02-15 11:47:40,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 11:47:40,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 11:47:40,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 11:47:40,437 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 11:47:40,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:47:40" (1/1) ... [2023-02-15 11:47:40,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:47:40,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:40,474 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) [2023-02-15 11:47:40,481 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 [2023-02-15 11:47:40,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 11:47:40,504 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-15 11:47:40,505 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-15 11:47:40,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 11:47:40,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 11:47:40,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 11:47:40,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 11:47:40,510 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 11:47:40,554 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 11:47:40,555 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 11:47:40,669 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 11:47:40,673 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 11:47:40,673 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 11:47:40,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:47:40 BoogieIcfgContainer [2023-02-15 11:47:40,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 11:47:40,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 11:47:40,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 11:47:40,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 11:47:40,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 11:47:40" (1/3) ... [2023-02-15 11:47:40,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f4251e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:47:40, skipping insertion in model container [2023-02-15 11:47:40,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:47:40" (2/3) ... [2023-02-15 11:47:40,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f4251e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:47:40, skipping insertion in model container [2023-02-15 11:47:40,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:47:40" (3/3) ... [2023-02-15 11:47:40,680 INFO L112 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound20.c [2023-02-15 11:47:40,693 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 11:47:40,694 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 11:47:40,733 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 11:47:40,746 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5922a10d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 11:47:40,760 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 11:47:40,763 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 11:47:40,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 11:47:40,773 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:40,773 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:40,774 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:40,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:40,778 INFO L85 PathProgramCache]: Analyzing trace with hash 738208203, now seen corresponding path program 1 times [2023-02-15 11:47:40,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:40,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192528952] [2023-02-15 11:47:40,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:40,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:40,844 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:40,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035320862] [2023-02-15 11:47:40,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:40,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:40,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:40,847 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) [2023-02-15 11:47:40,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 11:47:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:47:40,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 11:47:40,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 11:47:40,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:47:40,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:40,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192528952] [2023-02-15 11:47:40,945 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:40,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035320862] [2023-02-15 11:47:40,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035320862] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:47:40,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:47:40,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 11:47:40,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568682560] [2023-02-15 11:47:40,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:47:40,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 11:47:40,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:40,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 11:47:40,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 11:47:40,976 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 11:47:40,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:40,991 INFO L93 Difference]: Finished difference Result 61 states and 94 transitions. [2023-02-15 11:47:40,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 11:47:40,992 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-02-15 11:47:40,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:40,996 INFO L225 Difference]: With dead ends: 61 [2023-02-15 11:47:40,996 INFO L226 Difference]: Without dead ends: 28 [2023-02-15 11:47:40,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 11:47:41,001 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:41,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:47:41,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-15 11:47:41,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-15 11:47:41,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 11:47:41,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-02-15 11:47:41,023 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 18 [2023-02-15 11:47:41,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:41,023 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-02-15 11:47:41,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 11:47:41,024 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-02-15 11:47:41,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 11:47:41,025 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:41,025 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:41,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 11:47:41,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-15 11:47:41,230 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:41,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:41,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1770759922, now seen corresponding path program 1 times [2023-02-15 11:47:41,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:41,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611200143] [2023-02-15 11:47:41,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:41,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:41,241 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:41,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1766986915] [2023-02-15 11:47:41,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:41,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:41,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:41,265 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) [2023-02-15 11:47:41,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 11:47:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:47:41,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 11:47:41,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:41,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:47:41,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:47:41,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:41,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611200143] [2023-02-15 11:47:41,389 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:41,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766986915] [2023-02-15 11:47:41,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766986915] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:47:41,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:47:41,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 11:47:41,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405790548] [2023-02-15 11:47:41,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:47:41,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 11:47:41,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:41,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 11:47:41,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 11:47:41,393 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 11:47:41,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:41,408 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2023-02-15 11:47:41,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 11:47:41,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-02-15 11:47:41,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:41,409 INFO L225 Difference]: With dead ends: 37 [2023-02-15 11:47:41,409 INFO L226 Difference]: Without dead ends: 30 [2023-02-15 11:47:41,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 11:47:41,410 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 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 [2023-02-15 11:47:41,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:47:41,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-15 11:47:41,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-02-15 11:47:41,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 11:47:41,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-02-15 11:47:41,415 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 19 [2023-02-15 11:47:41,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:41,416 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-02-15 11:47:41,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 11:47:41,417 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-02-15 11:47:41,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 11:47:41,417 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:41,417 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:41,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 11:47:41,621 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,SelfDestructingSolverStorable1 [2023-02-15 11:47:41,621 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:41,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:41,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1769091626, now seen corresponding path program 1 times [2023-02-15 11:47:41,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:41,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243816881] [2023-02-15 11:47:41,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:41,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:41,630 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:41,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892434265] [2023-02-15 11:47:41,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:41,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:41,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:41,633 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) [2023-02-15 11:47:41,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 11:47:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:47:41,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 11:47:41,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 11:47:41,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:47:41,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:41,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243816881] [2023-02-15 11:47:41,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:41,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892434265] [2023-02-15 11:47:41,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892434265] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:47:41,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:47:41,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 11:47:41,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95684502] [2023-02-15 11:47:41,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:47:41,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 11:47:41,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:41,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 11:47:41,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-15 11:47:41,845 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 11:47:44,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:47:45,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:45,261 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2023-02-15 11:47:45,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 11:47:45,262 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-02-15 11:47:45,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:45,262 INFO L225 Difference]: With dead ends: 49 [2023-02-15 11:47:45,263 INFO L226 Difference]: Without dead ends: 47 [2023-02-15 11:47:45,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-15 11:47:45,264 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:45,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 122 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-02-15 11:47:45,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-15 11:47:45,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2023-02-15 11:47:45,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.393939393939394) internal successors, (46), 34 states have internal predecessors, (46), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 11:47:45,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2023-02-15 11:47:45,276 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 19 [2023-02-15 11:47:45,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:45,277 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2023-02-15 11:47:45,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 11:47:45,277 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2023-02-15 11:47:45,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 11:47:45,279 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:45,279 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:45,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-15 11:47:45,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:45,486 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:45,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:45,487 INFO L85 PathProgramCache]: Analyzing trace with hash -82041861, now seen corresponding path program 1 times [2023-02-15 11:47:45,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:45,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168293233] [2023-02-15 11:47:45,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:45,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:45,494 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:45,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630372631] [2023-02-15 11:47:45,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:45,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:45,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:45,500 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:47:45,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 11:47:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:47:45,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 11:47:45,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:47:45,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:47:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:47:45,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:45,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168293233] [2023-02-15 11:47:45,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:45,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630372631] [2023-02-15 11:47:45,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630372631] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:47:45,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:47:45,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-02-15 11:47:45,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986779997] [2023-02-15 11:47:45,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:47:45,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 11:47:45,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:45,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 11:47:45,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-15 11:47:45,751 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 11:47:45,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:45,897 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2023-02-15 11:47:45,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 11:47:45,898 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2023-02-15 11:47:45,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:45,899 INFO L225 Difference]: With dead ends: 53 [2023-02-15 11:47:45,899 INFO L226 Difference]: Without dead ends: 48 [2023-02-15 11:47:45,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-02-15 11:47:45,900 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:45,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 139 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:47:45,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-15 11:47:45,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 32. [2023-02-15 11:47:45,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 11:47:45,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2023-02-15 11:47:45,915 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 25 [2023-02-15 11:47:45,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:45,916 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2023-02-15 11:47:45,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 11:47:45,916 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2023-02-15 11:47:45,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 11:47:45,917 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:45,917 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:45,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 11:47:46,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:46,123 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:46,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:46,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1145481658, now seen corresponding path program 1 times [2023-02-15 11:47:46,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:46,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032883151] [2023-02-15 11:47:46,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:46,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:46,131 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:46,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [942144056] [2023-02-15 11:47:46,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:46,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:46,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:46,132 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:47:46,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 11:47:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:47:46,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 11:47:46,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:47:46,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:47:46,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:46,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032883151] [2023-02-15 11:47:46,199 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:46,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942144056] [2023-02-15 11:47:46,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942144056] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:47:46,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:47:46,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 11:47:46,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621245273] [2023-02-15 11:47:46,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:47:46,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 11:47:46,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:46,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 11:47:46,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 11:47:46,201 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 11:47:46,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:46,233 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2023-02-15 11:47:46,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 11:47:46,236 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-02-15 11:47:46,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:46,236 INFO L225 Difference]: With dead ends: 61 [2023-02-15 11:47:46,236 INFO L226 Difference]: Without dead ends: 40 [2023-02-15 11:47:46,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 11:47:46,237 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:46,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 109 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:47:46,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-15 11:47:46,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-02-15 11:47:46,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 11:47:46,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2023-02-15 11:47:46,247 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 31 [2023-02-15 11:47:46,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:46,247 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2023-02-15 11:47:46,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 11:47:46,248 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2023-02-15 11:47:46,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 11:47:46,248 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:46,248 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:46,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-15 11:47:46,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:46,455 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:46,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:46,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1102972225, now seen corresponding path program 1 times [2023-02-15 11:47:46,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:46,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663697491] [2023-02-15 11:47:46,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:46,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:46,464 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:46,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984610163] [2023-02-15 11:47:46,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:46,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:46,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:46,485 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:47:46,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 11:47:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:47:46,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 11:47:46,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:46,593 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:47:46,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:47:46,645 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 11:47:46,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:46,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663697491] [2023-02-15 11:47:46,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:46,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984610163] [2023-02-15 11:47:46,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984610163] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 11:47:46,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 11:47:46,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2023-02-15 11:47:46,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738954418] [2023-02-15 11:47:46,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:47:46,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 11:47:46,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:46,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 11:47:46,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-15 11:47:46,648 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 11:47:46,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:46,677 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2023-02-15 11:47:46,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 11:47:46,677 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2023-02-15 11:47:46,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:46,678 INFO L225 Difference]: With dead ends: 70 [2023-02-15 11:47:46,678 INFO L226 Difference]: Without dead ends: 49 [2023-02-15 11:47:46,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-15 11:47:46,679 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:46,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 114 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:47:46,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-15 11:47:46,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2023-02-15 11:47:46,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 11:47:46,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2023-02-15 11:47:46,688 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 37 [2023-02-15 11:47:46,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:46,688 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2023-02-15 11:47:46,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 11:47:46,688 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2023-02-15 11:47:46,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 11:47:46,689 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:46,689 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:46,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 11:47:46,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:46,895 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:46,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:46,895 INFO L85 PathProgramCache]: Analyzing trace with hash 30895492, now seen corresponding path program 1 times [2023-02-15 11:47:46,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:46,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062688896] [2023-02-15 11:47:46,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:46,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:46,901 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:46,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44337023] [2023-02-15 11:47:46,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:46,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:46,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:46,917 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:47:46,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 11:47:46,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:47:46,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 11:47:46,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:47:47,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:47:47,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 11:47:47,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:47,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062688896] [2023-02-15 11:47:47,068 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:47,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44337023] [2023-02-15 11:47:47,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44337023] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:47:47,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:47:47,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-15 11:47:47,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605298697] [2023-02-15 11:47:47,069 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:47:47,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 11:47:47,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:47,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 11:47:47,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-15 11:47:47,070 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-15 11:47:47,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:47,179 INFO L93 Difference]: Finished difference Result 125 states and 156 transitions. [2023-02-15 11:47:47,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 11:47:47,180 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 39 [2023-02-15 11:47:47,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:47,181 INFO L225 Difference]: With dead ends: 125 [2023-02-15 11:47:47,181 INFO L226 Difference]: Without dead ends: 104 [2023-02-15 11:47:47,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-02-15 11:47:47,182 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 62 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:47,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 215 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:47:47,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-02-15 11:47:47,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2023-02-15 11:47:47,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 68 states have internal predecessors, (82), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-15 11:47:47,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2023-02-15 11:47:47,200 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 39 [2023-02-15 11:47:47,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:47,200 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2023-02-15 11:47:47,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-15 11:47:47,200 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2023-02-15 11:47:47,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 11:47:47,201 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:47,201 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:47,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 11:47:47,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:47,406 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:47,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:47,407 INFO L85 PathProgramCache]: Analyzing trace with hash -798356602, now seen corresponding path program 1 times [2023-02-15 11:47:47,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:47,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756977977] [2023-02-15 11:47:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:47,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:47,413 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:47,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1662809022] [2023-02-15 11:47:47,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:47,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:47,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:47,414 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:47:47,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 11:47:47,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:47:47,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 11:47:47,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:47,481 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 11:47:47,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:47:47,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:47,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756977977] [2023-02-15 11:47:47,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:47,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662809022] [2023-02-15 11:47:47,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662809022] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:47:47,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:47:47,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 11:47:47,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912849413] [2023-02-15 11:47:47,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:47:47,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 11:47:47,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:47,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 11:47:47,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 11:47:47,483 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 11:47:47,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:47,524 INFO L93 Difference]: Finished difference Result 154 states and 198 transitions. [2023-02-15 11:47:47,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 11:47:47,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 43 [2023-02-15 11:47:47,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:47,526 INFO L225 Difference]: With dead ends: 154 [2023-02-15 11:47:47,526 INFO L226 Difference]: Without dead ends: 115 [2023-02-15 11:47:47,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 11:47:47,527 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 16 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:47,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 109 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:47:47,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-15 11:47:47,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2023-02-15 11:47:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 79 states have internal predecessors, (96), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-02-15 11:47:47,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2023-02-15 11:47:47,546 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 43 [2023-02-15 11:47:47,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:47,547 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2023-02-15 11:47:47,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 11:47:47,547 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2023-02-15 11:47:47,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 11:47:47,548 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:47,548 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:47,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 11:47:47,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-15 11:47:47,753 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:47,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:47,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1023958197, now seen corresponding path program 1 times [2023-02-15 11:47:47,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:47,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244789785] [2023-02-15 11:47:47,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:47,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:47,759 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:47,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006963829] [2023-02-15 11:47:47,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:47,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:47,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:47,765 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:47:47,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 11:47:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:47:47,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 11:47:47,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:47,888 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:47:47,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:47:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 11:47:47,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:47,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244789785] [2023-02-15 11:47:47,956 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:47,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006963829] [2023-02-15 11:47:47,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006963829] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:47:47,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:47:47,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-02-15 11:47:47,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689023761] [2023-02-15 11:47:47,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:47:47,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 11:47:47,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:47,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 11:47:47,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-02-15 11:47:47,958 INFO L87 Difference]: Start difference. First operand 105 states and 133 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-02-15 11:47:48,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:48,102 INFO L93 Difference]: Finished difference Result 215 states and 279 transitions. [2023-02-15 11:47:48,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 11:47:48,102 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 45 [2023-02-15 11:47:48,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:48,103 INFO L225 Difference]: With dead ends: 215 [2023-02-15 11:47:48,103 INFO L226 Difference]: Without dead ends: 168 [2023-02-15 11:47:48,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2023-02-15 11:47:48,104 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 107 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:48,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 234 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:47:48,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-15 11:47:48,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 149. [2023-02-15 11:47:48,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 111 states have (on average 1.2432432432432432) internal successors, (138), 112 states have internal predecessors, (138), 28 states have call successors, (28), 10 states have call predecessors, (28), 9 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2023-02-15 11:47:48,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 193 transitions. [2023-02-15 11:47:48,127 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 193 transitions. Word has length 45 [2023-02-15 11:47:48,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:48,127 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 193 transitions. [2023-02-15 11:47:48,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-02-15 11:47:48,128 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 193 transitions. [2023-02-15 11:47:48,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 11:47:48,128 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:48,128 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:48,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 11:47:48,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:48,333 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:48,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:48,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1104536814, now seen corresponding path program 1 times [2023-02-15 11:47:48,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:48,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100504309] [2023-02-15 11:47:48,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:48,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:48,340 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:48,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [629708911] [2023-02-15 11:47:48,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:48,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:48,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:48,354 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:47:48,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 11:47:48,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:47:48,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-15 11:47:48,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:48,465 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:47:48,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:47:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 11:47:48,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:48,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100504309] [2023-02-15 11:47:48,540 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:48,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629708911] [2023-02-15 11:47:48,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629708911] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:47:48,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:47:48,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-15 11:47:48,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048941422] [2023-02-15 11:47:48,541 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:47:48,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 11:47:48,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:48,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 11:47:48,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-15 11:47:48,544 INFO L87 Difference]: Start difference. First operand 149 states and 193 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2023-02-15 11:47:48,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:48,728 INFO L93 Difference]: Finished difference Result 207 states and 274 transitions. [2023-02-15 11:47:48,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 11:47:48,729 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 51 [2023-02-15 11:47:48,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:48,731 INFO L225 Difference]: With dead ends: 207 [2023-02-15 11:47:48,732 INFO L226 Difference]: Without dead ends: 202 [2023-02-15 11:47:48,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2023-02-15 11:47:48,732 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 130 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:48,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 234 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:47:48,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-02-15 11:47:48,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2023-02-15 11:47:48,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 144 states have (on average 1.2361111111111112) internal successors, (178), 148 states have internal predecessors, (178), 38 states have call successors, (38), 12 states have call predecessors, (38), 11 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2023-02-15 11:47:48,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 253 transitions. [2023-02-15 11:47:48,762 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 253 transitions. Word has length 51 [2023-02-15 11:47:48,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:48,763 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 253 transitions. [2023-02-15 11:47:48,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2023-02-15 11:47:48,763 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 253 transitions. [2023-02-15 11:47:48,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-15 11:47:48,766 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:48,766 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:48,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-15 11:47:48,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 11:47:48,971 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:48,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:48,972 INFO L85 PathProgramCache]: Analyzing trace with hash 540498080, now seen corresponding path program 1 times [2023-02-15 11:47:48,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:48,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710212333] [2023-02-15 11:47:48,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:48,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:48,987 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:48,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651641489] [2023-02-15 11:47:48,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:48,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:48,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:48,989 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:47:49,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 11:47:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:47:49,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 11:47:49,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-02-15 11:47:49,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:47:49,130 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-02-15 11:47:49,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:49,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710212333] [2023-02-15 11:47:49,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:49,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651641489] [2023-02-15 11:47:49,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651641489] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:47:49,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:47:49,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2023-02-15 11:47:49,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831947299] [2023-02-15 11:47:49,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:47:49,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 11:47:49,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:49,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 11:47:49,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 11:47:49,133 INFO L87 Difference]: Start difference. First operand 194 states and 253 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-15 11:47:49,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:49,229 INFO L93 Difference]: Finished difference Result 498 states and 693 transitions. [2023-02-15 11:47:49,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 11:47:49,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 87 [2023-02-15 11:47:49,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:49,232 INFO L225 Difference]: With dead ends: 498 [2023-02-15 11:47:49,232 INFO L226 Difference]: Without dead ends: 355 [2023-02-15 11:47:49,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 11:47:49,234 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 15 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:49,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 130 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:47:49,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2023-02-15 11:47:49,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 338. [2023-02-15 11:47:49,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 254 states have (on average 1.2677165354330708) internal successors, (322), 260 states have internal predecessors, (322), 72 states have call successors, (72), 12 states have call predecessors, (72), 11 states have return successors, (71), 65 states have call predecessors, (71), 71 states have call successors, (71) [2023-02-15 11:47:49,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 465 transitions. [2023-02-15 11:47:49,285 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 465 transitions. Word has length 87 [2023-02-15 11:47:49,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:49,286 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 465 transitions. [2023-02-15 11:47:49,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-15 11:47:49,286 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 465 transitions. [2023-02-15 11:47:49,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-15 11:47:49,288 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:49,288 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:49,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-15 11:47:49,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-15 11:47:49,493 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:49,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:49,493 INFO L85 PathProgramCache]: Analyzing trace with hash -134976430, now seen corresponding path program 2 times [2023-02-15 11:47:49,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:49,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679607786] [2023-02-15 11:47:49,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:49,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:49,508 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:49,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488657496] [2023-02-15 11:47:49,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:47:49,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:49,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:49,509 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:47:49,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 11:47:49,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:47:49,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:47:49,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 11:47:49,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 11:47:49,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:47:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-02-15 11:47:49,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:49,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679607786] [2023-02-15 11:47:49,810 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:49,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488657496] [2023-02-15 11:47:49,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488657496] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:47:49,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:47:49,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2023-02-15 11:47:49,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774303788] [2023-02-15 11:47:49,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:47:49,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 11:47:49,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:49,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 11:47:49,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2023-02-15 11:47:49,812 INFO L87 Difference]: Start difference. First operand 338 states and 465 transitions. Second operand has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) [2023-02-15 11:47:50,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:50,221 INFO L93 Difference]: Finished difference Result 981 states and 1419 transitions. [2023-02-15 11:47:50,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-15 11:47:50,222 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) Word has length 87 [2023-02-15 11:47:50,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:50,224 INFO L225 Difference]: With dead ends: 981 [2023-02-15 11:47:50,224 INFO L226 Difference]: Without dead ends: 838 [2023-02-15 11:47:50,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=403, Invalid=719, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 11:47:50,225 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 250 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:50,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 361 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:47:50,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2023-02-15 11:47:50,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 789. [2023-02-15 11:47:50,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 596 states have (on average 1.2684563758389262) internal successors, (756), 605 states have internal predecessors, (756), 175 states have call successors, (175), 18 states have call predecessors, (175), 17 states have return successors, (174), 165 states have call predecessors, (174), 174 states have call successors, (174) [2023-02-15 11:47:50,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1105 transitions. [2023-02-15 11:47:50,330 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1105 transitions. Word has length 87 [2023-02-15 11:47:50,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:50,331 INFO L495 AbstractCegarLoop]: Abstraction has 789 states and 1105 transitions. [2023-02-15 11:47:50,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) [2023-02-15 11:47:50,331 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1105 transitions. [2023-02-15 11:47:50,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-02-15 11:47:50,336 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:50,336 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:50,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 11:47:50,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 11:47:50,541 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:50,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:50,541 INFO L85 PathProgramCache]: Analyzing trace with hash 2132027339, now seen corresponding path program 1 times [2023-02-15 11:47:50,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:50,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537094404] [2023-02-15 11:47:50,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:50,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:50,547 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:50,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1973761900] [2023-02-15 11:47:50,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:50,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:50,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:50,549 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:47:50,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 11:47:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:47:50,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-15 11:47:50,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:50,768 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:47:50,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:47:50,952 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-02-15 11:47:50,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:50,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537094404] [2023-02-15 11:47:50,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:50,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973761900] [2023-02-15 11:47:50,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973761900] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:47:50,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:47:50,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2023-02-15 11:47:50,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665727924] [2023-02-15 11:47:50,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:47:50,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 11:47:50,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:50,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 11:47:50,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2023-02-15 11:47:50,955 INFO L87 Difference]: Start difference. First operand 789 states and 1105 transitions. Second operand has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2023-02-15 11:47:51,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:51,490 INFO L93 Difference]: Finished difference Result 1281 states and 1795 transitions. [2023-02-15 11:47:51,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-15 11:47:51,491 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 93 [2023-02-15 11:47:51,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:51,494 INFO L225 Difference]: With dead ends: 1281 [2023-02-15 11:47:51,494 INFO L226 Difference]: Without dead ends: 791 [2023-02-15 11:47:51,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=1056, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 11:47:51,496 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 376 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:51,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 497 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:47:51,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2023-02-15 11:47:51,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 736. [2023-02-15 11:47:51,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 552 states have (on average 1.2210144927536233) internal successors, (674), 556 states have internal predecessors, (674), 162 states have call successors, (162), 22 states have call predecessors, (162), 21 states have return successors, (161), 157 states have call predecessors, (161), 161 states have call successors, (161) [2023-02-15 11:47:51,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 997 transitions. [2023-02-15 11:47:51,583 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 997 transitions. Word has length 93 [2023-02-15 11:47:51,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:51,583 INFO L495 AbstractCegarLoop]: Abstraction has 736 states and 997 transitions. [2023-02-15 11:47:51,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2023-02-15 11:47:51,584 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 997 transitions. [2023-02-15 11:47:51,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-02-15 11:47:51,585 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:51,585 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:51,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-15 11:47:51,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 11:47:51,790 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:51,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:51,791 INFO L85 PathProgramCache]: Analyzing trace with hash 519126930, now seen corresponding path program 1 times [2023-02-15 11:47:51,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:51,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062167877] [2023-02-15 11:47:51,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:51,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:51,803 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:51,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [950228773] [2023-02-15 11:47:51,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:51,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:51,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:51,804 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:47:51,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 11:47:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:47:51,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 11:47:51,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:52,035 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 11:47:52,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:47:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-02-15 11:47:52,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:52,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062167877] [2023-02-15 11:47:52,201 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:52,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950228773] [2023-02-15 11:47:52,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950228773] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:47:52,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:47:52,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2023-02-15 11:47:52,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764573626] [2023-02-15 11:47:52,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:47:52,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 11:47:52,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:52,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 11:47:52,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2023-02-15 11:47:52,204 INFO L87 Difference]: Start difference. First operand 736 states and 997 transitions. Second operand has 24 states, 24 states have (on average 4.666666666666667) internal successors, (112), 24 states have internal predecessors, (112), 21 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) [2023-02-15 11:47:52,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:52,636 INFO L93 Difference]: Finished difference Result 753 states and 1015 transitions. [2023-02-15 11:47:52,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-15 11:47:52,637 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.666666666666667) internal successors, (112), 24 states have internal predecessors, (112), 21 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) Word has length 99 [2023-02-15 11:47:52,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:52,639 INFO L225 Difference]: With dead ends: 753 [2023-02-15 11:47:52,640 INFO L226 Difference]: Without dead ends: 748 [2023-02-15 11:47:52,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=551, Invalid=1009, Unknown=0, NotChecked=0, Total=1560 [2023-02-15 11:47:52,641 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 308 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:52,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 472 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:47:52,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2023-02-15 11:47:52,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 742. [2023-02-15 11:47:52,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 558 states have (on average 1.1863799283154122) internal successors, (662), 560 states have internal predecessors, (662), 162 states have call successors, (162), 22 states have call predecessors, (162), 21 states have return successors, (161), 159 states have call predecessors, (161), 161 states have call successors, (161) [2023-02-15 11:47:52,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 985 transitions. [2023-02-15 11:47:52,730 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 985 transitions. Word has length 99 [2023-02-15 11:47:52,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:52,730 INFO L495 AbstractCegarLoop]: Abstraction has 742 states and 985 transitions. [2023-02-15 11:47:52,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.666666666666667) internal successors, (112), 24 states have internal predecessors, (112), 21 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) [2023-02-15 11:47:52,731 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 985 transitions. [2023-02-15 11:47:52,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-02-15 11:47:52,733 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:52,733 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 10, 8, 8, 8, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:52,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 11:47:52,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:52,938 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:52,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:52,938 INFO L85 PathProgramCache]: Analyzing trace with hash 682851631, now seen corresponding path program 3 times [2023-02-15 11:47:52,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:52,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352565086] [2023-02-15 11:47:52,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:52,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:52,946 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:52,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519376324] [2023-02-15 11:47:52,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:47:52,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:52,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:52,953 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:47:52,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 11:47:53,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 11:47:53,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:47:53,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 11:47:53,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:53,065 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2023-02-15 11:47:53,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:47:53,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:53,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352565086] [2023-02-15 11:47:53,065 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:53,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519376324] [2023-02-15 11:47:53,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519376324] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:47:53,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:47:53,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 11:47:53,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934886002] [2023-02-15 11:47:53,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:47:53,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 11:47:53,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:53,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 11:47:53,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 11:47:53,067 INFO L87 Difference]: Start difference. First operand 742 states and 985 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-15 11:47:53,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:53,158 INFO L93 Difference]: Finished difference Result 932 states and 1247 transitions. [2023-02-15 11:47:53,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 11:47:53,159 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 169 [2023-02-15 11:47:53,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:53,162 INFO L225 Difference]: With dead ends: 932 [2023-02-15 11:47:53,163 INFO L226 Difference]: Without dead ends: 803 [2023-02-15 11:47:53,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-15 11:47:53,165 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 11 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:53,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 142 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:47:53,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2023-02-15 11:47:53,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 768. [2023-02-15 11:47:53,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 579 states have (on average 1.1744386873920554) internal successors, (680), 581 states have internal predecessors, (680), 164 states have call successors, (164), 25 states have call predecessors, (164), 24 states have return successors, (163), 161 states have call predecessors, (163), 163 states have call successors, (163) [2023-02-15 11:47:53,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1007 transitions. [2023-02-15 11:47:53,240 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1007 transitions. Word has length 169 [2023-02-15 11:47:53,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:53,241 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 1007 transitions. [2023-02-15 11:47:53,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-15 11:47:53,241 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1007 transitions. [2023-02-15 11:47:53,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-02-15 11:47:53,244 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:53,244 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 9, 8, 8, 8, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:53,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-15 11:47:53,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-15 11:47:53,449 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:53,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:53,449 INFO L85 PathProgramCache]: Analyzing trace with hash 356922161, now seen corresponding path program 1 times [2023-02-15 11:47:53,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:53,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519783312] [2023-02-15 11:47:53,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:53,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:53,459 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:53,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734361950] [2023-02-15 11:47:53,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:53,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:53,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:53,460 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:47:53,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 11:47:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:47:53,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 11:47:53,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 546 proven. 0 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2023-02-15 11:47:53,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:47:53,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:53,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519783312] [2023-02-15 11:47:53,545 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:53,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734361950] [2023-02-15 11:47:53,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734361950] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:47:53,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:47:53,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 11:47:53,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886249303] [2023-02-15 11:47:53,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:47:53,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 11:47:53,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:53,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 11:47:53,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 11:47:53,547 INFO L87 Difference]: Start difference. First operand 768 states and 1007 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-15 11:47:53,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:53,654 INFO L93 Difference]: Finished difference Result 1294 states and 1697 transitions. [2023-02-15 11:47:53,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 11:47:53,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 173 [2023-02-15 11:47:53,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:53,657 INFO L225 Difference]: With dead ends: 1294 [2023-02-15 11:47:53,657 INFO L226 Difference]: Without dead ends: 814 [2023-02-15 11:47:53,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 11:47:53,659 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 3 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:53,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 75 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:47:53,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2023-02-15 11:47:53,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 765. [2023-02-15 11:47:53,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 579 states have (on average 1.1709844559585492) internal successors, (678), 582 states have internal predecessors, (678), 161 states have call successors, (161), 25 states have call predecessors, (161), 24 states have return successors, (160), 157 states have call predecessors, (160), 160 states have call successors, (160) [2023-02-15 11:47:53,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 999 transitions. [2023-02-15 11:47:53,738 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 999 transitions. Word has length 173 [2023-02-15 11:47:53,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:53,738 INFO L495 AbstractCegarLoop]: Abstraction has 765 states and 999 transitions. [2023-02-15 11:47:53,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-15 11:47:53,739 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 999 transitions. [2023-02-15 11:47:53,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-02-15 11:47:53,741 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:53,741 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 8, 8, 8, 8, 8, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:53,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 11:47:53,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-15 11:47:53,964 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:53,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:53,964 INFO L85 PathProgramCache]: Analyzing trace with hash 45613149, now seen corresponding path program 2 times [2023-02-15 11:47:53,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:53,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566795608] [2023-02-15 11:47:53,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:53,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:53,973 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:53,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581698844] [2023-02-15 11:47:53,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:47:53,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:53,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:53,993 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:47:54,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 11:47:54,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:47:54,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:47:54,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-15 11:47:54,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:54,415 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 226 proven. 726 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 11:47:54,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:47:54,729 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 94 proven. 182 refuted. 0 times theorem prover too weak. 692 trivial. 0 not checked. [2023-02-15 11:47:54,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:54,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566795608] [2023-02-15 11:47:54,729 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:54,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581698844] [2023-02-15 11:47:54,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581698844] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:47:54,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:47:54,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 24 [2023-02-15 11:47:54,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948104733] [2023-02-15 11:47:54,730 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:47:54,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 11:47:54,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:54,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 11:47:54,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2023-02-15 11:47:54,731 INFO L87 Difference]: Start difference. First operand 765 states and 999 transitions. Second operand has 24 states, 24 states have (on average 7.541666666666667) internal successors, (181), 24 states have internal predecessors, (181), 21 states have call successors, (41), 20 states have call predecessors, (41), 20 states have return successors, (40), 21 states have call predecessors, (40), 21 states have call successors, (40) [2023-02-15 11:47:55,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:47:55,190 INFO L93 Difference]: Finished difference Result 797 states and 1039 transitions. [2023-02-15 11:47:55,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-15 11:47:55,191 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 7.541666666666667) internal successors, (181), 24 states have internal predecessors, (181), 21 states have call successors, (41), 20 states have call predecessors, (41), 20 states have return successors, (40), 21 states have call predecessors, (40), 21 states have call successors, (40) Word has length 173 [2023-02-15 11:47:55,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:47:55,193 INFO L225 Difference]: With dead ends: 797 [2023-02-15 11:47:55,193 INFO L226 Difference]: Without dead ends: 748 [2023-02-15 11:47:55,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 306 SyntacticMatches, 16 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=631, Invalid=1091, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 11:47:55,194 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 143 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:47:55,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 472 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:47:55,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2023-02-15 11:47:55,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 744. [2023-02-15 11:47:55,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 565 states have (on average 1.1610619469026549) internal successors, (656), 565 states have internal predecessors, (656), 156 states have call successors, (156), 23 states have call predecessors, (156), 22 states have return successors, (155), 155 states have call predecessors, (155), 155 states have call successors, (155) [2023-02-15 11:47:55,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 967 transitions. [2023-02-15 11:47:55,290 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 967 transitions. Word has length 173 [2023-02-15 11:47:55,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:47:55,291 INFO L495 AbstractCegarLoop]: Abstraction has 744 states and 967 transitions. [2023-02-15 11:47:55,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.541666666666667) internal successors, (181), 24 states have internal predecessors, (181), 21 states have call successors, (41), 20 states have call predecessors, (41), 20 states have return successors, (40), 21 states have call predecessors, (40), 21 states have call successors, (40) [2023-02-15 11:47:55,291 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 967 transitions. [2023-02-15 11:47:55,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-02-15 11:47:55,293 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:47:55,293 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 8, 8, 8, 8, 8, 8, 8, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:47:55,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 11:47:55,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-15 11:47:55,499 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:47:55,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:47:55,499 INFO L85 PathProgramCache]: Analyzing trace with hash 2005289494, now seen corresponding path program 2 times [2023-02-15 11:47:55,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:47:55,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697927836] [2023-02-15 11:47:55,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:47:55,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:47:55,506 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:47:55,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671448951] [2023-02-15 11:47:55,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:47:55,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:47:55,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:47:55,520 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:47:55,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 11:47:55,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:47:55,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:47:55,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 11:47:55,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:47:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 490 proven. 112 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2023-02-15 11:47:57,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:47:59,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 189 proven. 92 refuted. 0 times theorem prover too weak. 779 trivial. 0 not checked. [2023-02-15 11:47:59,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:47:59,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697927836] [2023-02-15 11:47:59,910 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:47:59,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671448951] [2023-02-15 11:47:59,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671448951] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:47:59,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:47:59,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2023-02-15 11:47:59,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230560324] [2023-02-15 11:47:59,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:47:59,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 11:47:59,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:47:59,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 11:47:59,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-02-15 11:47:59,912 INFO L87 Difference]: Start difference. First operand 744 states and 967 transitions. Second operand has 20 states, 19 states have (on average 6.105263157894737) internal successors, (116), 17 states have internal predecessors, (116), 15 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (38), 17 states have call predecessors, (38), 15 states have call successors, (38) [2023-02-15 11:48:01,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 11:48:04,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 11:48:06,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 11:48:09,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 11:48:11,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 11:48:14,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:48:18,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 11:48:24,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 11:48:28,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 11:48:34,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 11:48:40,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 11:48:50,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:48:50,572 INFO L93 Difference]: Finished difference Result 1813 states and 2436 transitions. [2023-02-15 11:48:50,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-15 11:48:50,572 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 6.105263157894737) internal successors, (116), 17 states have internal predecessors, (116), 15 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (38), 17 states have call predecessors, (38), 15 states have call successors, (38) Word has length 179 [2023-02-15 11:48:50,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:48:50,580 INFO L225 Difference]: With dead ends: 1813 [2023-02-15 11:48:50,581 INFO L226 Difference]: Without dead ends: 1504 [2023-02-15 11:48:50,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 331 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=348, Invalid=1454, Unknown=4, NotChecked=0, Total=1806 [2023-02-15 11:48:50,582 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 344 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 221 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.5s IncrementalHoareTripleChecker+Time [2023-02-15 11:48:50,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 880 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 795 Invalid, 13 Unknown, 0 Unchecked, 31.5s Time] [2023-02-15 11:48:50,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2023-02-15 11:48:50,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1158. [2023-02-15 11:48:50,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 880 states have (on average 1.1954545454545455) internal successors, (1052), 880 states have internal predecessors, (1052), 255 states have call successors, (255), 23 states have call predecessors, (255), 22 states have return successors, (254), 254 states have call predecessors, (254), 254 states have call successors, (254) [2023-02-15 11:48:50,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1561 transitions. [2023-02-15 11:48:50,761 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1561 transitions. Word has length 179 [2023-02-15 11:48:50,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:48:50,762 INFO L495 AbstractCegarLoop]: Abstraction has 1158 states and 1561 transitions. [2023-02-15 11:48:50,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 6.105263157894737) internal successors, (116), 17 states have internal predecessors, (116), 15 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (38), 17 states have call predecessors, (38), 15 states have call successors, (38) [2023-02-15 11:48:50,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1561 transitions. [2023-02-15 11:48:50,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-02-15 11:48:50,765 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:48:50,766 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 9, 9, 9, 9, 7, 7, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:48:50,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-15 11:48:50,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-15 11:48:50,971 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:48:50,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:48:50,971 INFO L85 PathProgramCache]: Analyzing trace with hash 956641480, now seen corresponding path program 3 times [2023-02-15 11:48:50,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:48:50,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382983598] [2023-02-15 11:48:50,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:48:50,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:48:50,978 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:48:50,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [71679440] [2023-02-15 11:48:50,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:48:50,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:48:50,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:48:50,980 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:48:50,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 11:48:51,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 11:48:51,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:48:51,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 11:48:51,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:48:57,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 131 proven. 1 refuted. 0 times theorem prover too weak. 932 trivial. 0 not checked. [2023-02-15 11:48:57,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:48:59,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:48:59,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382983598] [2023-02-15 11:48:59,889 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:48:59,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71679440] [2023-02-15 11:48:59,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71679440] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:48:59,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 11:48:59,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-02-15 11:48:59,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20669342] [2023-02-15 11:48:59,889 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 11:48:59,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 11:48:59,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:48:59,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 11:48:59,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=198, Unknown=1, NotChecked=0, Total=240 [2023-02-15 11:48:59,891 INFO L87 Difference]: Start difference. First operand 1158 states and 1561 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 11:49:01,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:49:02,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:49:02,543 INFO L93 Difference]: Finished difference Result 1253 states and 1682 transitions. [2023-02-15 11:49:02,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 11:49:02,543 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 179 [2023-02-15 11:49:02,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:49:02,549 INFO L225 Difference]: With dead ends: 1253 [2023-02-15 11:49:02,549 INFO L226 Difference]: Without dead ends: 1185 [2023-02-15 11:49:02,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=67, Invalid=312, Unknown=1, NotChecked=0, Total=380 [2023-02-15 11:49:02,550 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 35 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-02-15 11:49:02,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 258 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 254 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2023-02-15 11:49:02,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2023-02-15 11:49:02,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1131. [2023-02-15 11:49:02,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 854 states have (on average 1.1885245901639345) internal successors, (1015), 865 states have internal predecessors, (1015), 252 states have call successors, (252), 25 states have call predecessors, (252), 24 states have return successors, (251), 240 states have call predecessors, (251), 251 states have call successors, (251) [2023-02-15 11:49:02,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1518 transitions. [2023-02-15 11:49:02,726 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1518 transitions. Word has length 179 [2023-02-15 11:49:02,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:49:02,726 INFO L495 AbstractCegarLoop]: Abstraction has 1131 states and 1518 transitions. [2023-02-15 11:49:02,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 11:49:02,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1518 transitions. [2023-02-15 11:49:02,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-02-15 11:49:02,730 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:49:02,730 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 10, 10, 10, 10, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:49:02,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-15 11:49:02,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:49:02,942 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:49:02,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:49:02,943 INFO L85 PathProgramCache]: Analyzing trace with hash 25864770, now seen corresponding path program 4 times [2023-02-15 11:49:02,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:49:02,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412034437] [2023-02-15 11:49:02,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:49:02,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:49:02,950 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:49:02,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [243405132] [2023-02-15 11:49:02,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:49:02,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:49:02,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:49:02,958 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:49:02,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 11:49:03,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:49:03,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:49:03,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 11:49:03,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:49:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 402 proven. 144 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-02-15 11:49:03,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:49:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 142 proven. 156 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2023-02-15 11:49:03,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:49:03,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412034437] [2023-02-15 11:49:03,378 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:49:03,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243405132] [2023-02-15 11:49:03,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243405132] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:49:03,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:49:03,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-02-15 11:49:03,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977065225] [2023-02-15 11:49:03,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:49:03,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 11:49:03,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:49:03,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 11:49:03,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-02-15 11:49:03,379 INFO L87 Difference]: Start difference. First operand 1131 states and 1518 transitions. Second operand has 18 states, 18 states have (on average 6.5) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (36), 18 states have call predecessors, (36), 18 states have call successors, (36) [2023-02-15 11:49:04,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:49:04,555 INFO L93 Difference]: Finished difference Result 2736 states and 3755 transitions. [2023-02-15 11:49:04,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 11:49:04,555 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.5) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (36), 18 states have call predecessors, (36), 18 states have call successors, (36) Word has length 179 [2023-02-15 11:49:04,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:49:04,562 INFO L225 Difference]: With dead ends: 2736 [2023-02-15 11:49:04,563 INFO L226 Difference]: Without dead ends: 2130 [2023-02-15 11:49:04,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=379, Invalid=953, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 11:49:04,564 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 231 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 11:49:04,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 692 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 11:49:04,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2023-02-15 11:49:04,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 1593. [2023-02-15 11:49:04,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1204 states have (on average 1.1893687707641196) internal successors, (1432), 1223 states have internal predecessors, (1432), 364 states have call successors, (364), 25 states have call predecessors, (364), 24 states have return successors, (363), 344 states have call predecessors, (363), 363 states have call successors, (363) [2023-02-15 11:49:04,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 2159 transitions. [2023-02-15 11:49:04,858 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 2159 transitions. Word has length 179 [2023-02-15 11:49:04,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:49:04,858 INFO L495 AbstractCegarLoop]: Abstraction has 1593 states and 2159 transitions. [2023-02-15 11:49:04,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.5) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (36), 18 states have call predecessors, (36), 18 states have call successors, (36) [2023-02-15 11:49:04,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 2159 transitions. [2023-02-15 11:49:04,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-02-15 11:49:04,863 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:49:04,863 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 11, 11, 11, 8, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:49:04,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-02-15 11:49:05,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:49:05,068 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:49:05,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:49:05,068 INFO L85 PathProgramCache]: Analyzing trace with hash -95756022, now seen corresponding path program 5 times [2023-02-15 11:49:05,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:49:05,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321782948] [2023-02-15 11:49:05,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:49:05,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:49:05,075 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:49:05,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [932344103] [2023-02-15 11:49:05,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 11:49:05,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:49:05,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:49:05,077 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:49:05,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-15 11:49:06,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-02-15 11:49:06,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-02-15 11:49:06,089 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 11:49:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 11:49:06,192 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 11:49:06,193 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-15 11:49:06,193 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-15 11:49:06,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-15 11:49:06,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:49:06,406 INFO L445 BasicCegarLoop]: Path program histogram: [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:49:06,409 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-15 11:49:06,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 11:49:06 BoogieIcfgContainer [2023-02-15 11:49:06,475 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-15 11:49:06,476 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-15 11:49:06,476 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-15 11:49:06,476 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-15 11:49:06,476 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:47:40" (3/4) ... [2023-02-15 11:49:06,477 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-15 11:49:06,531 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-15 11:49:06,531 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-15 11:49:06,532 INFO L158 Benchmark]: Toolchain (without parser) took 86274.77ms. Allocated memory was 140.5MB in the beginning and 249.6MB in the end (delta: 109.1MB). Free memory was 95.7MB in the beginning and 119.6MB in the end (delta: -23.9MB). Peak memory consumption was 84.7MB. Max. memory is 16.1GB. [2023-02-15 11:49:06,532 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 113.2MB. Free memory is still 65.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 11:49:06,532 INFO L158 Benchmark]: CACSL2BoogieTranslator took 142.06ms. Allocated memory is still 140.5MB. Free memory was 95.4MB in the beginning and 84.6MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-15 11:49:06,532 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.35ms. Allocated memory is still 140.5MB. Free memory was 84.6MB in the beginning and 83.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 11:49:06,533 INFO L158 Benchmark]: Boogie Preprocessor took 14.18ms. Allocated memory is still 140.5MB. Free memory was 83.2MB in the beginning and 82.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 11:49:06,533 INFO L158 Benchmark]: RCFGBuilder took 237.74ms. Allocated memory is still 140.5MB. Free memory was 82.0MB in the beginning and 70.3MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-02-15 11:49:06,533 INFO L158 Benchmark]: TraceAbstraction took 85799.20ms. Allocated memory was 140.5MB in the beginning and 249.6MB in the end (delta: 109.1MB). Free memory was 69.8MB in the beginning and 125.9MB in the end (delta: -56.2MB). Peak memory consumption was 53.2MB. Max. memory is 16.1GB. [2023-02-15 11:49:06,533 INFO L158 Benchmark]: Witness Printer took 56.06ms. Allocated memory is still 249.6MB. Free memory was 125.9MB in the beginning and 119.6MB in the end (delta: 6.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-02-15 11:49:06,534 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 113.2MB. Free memory is still 65.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 142.06ms. Allocated memory is still 140.5MB. Free memory was 95.4MB in the beginning and 84.6MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.35ms. Allocated memory is still 140.5MB. Free memory was 84.6MB in the beginning and 83.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 14.18ms. Allocated memory is still 140.5MB. Free memory was 83.2MB in the beginning and 82.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 237.74ms. Allocated memory is still 140.5MB. Free memory was 82.0MB in the beginning and 70.3MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 85799.20ms. Allocated memory was 140.5MB in the beginning and 249.6MB in the end (delta: 109.1MB). Free memory was 69.8MB in the beginning and 125.9MB in the end (delta: -56.2MB). Peak memory consumption was 53.2MB. Max. memory is 16.1GB. * Witness Printer took 56.06ms. Allocated memory is still 249.6MB. Free memory was 125.9MB in the beginning and 119.6MB in the end (delta: 6.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [A=839, counter=0, R=28] [L27] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L27] RET assume_abort_if_not(A % 2 == 1) VAL [A=839, counter=0, R=28] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [A=839, counter=0, R=28, r=-55, u=57, v=1] [L34] EXPR counter++ VAL [A=839, counter=1, counter++=0, r=-55, R=28, u=57, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=839, counter=1, R=28, r=-55, u=57, v=1] [L36] COND FALSE !(!(r != 0)) VAL [A=839, counter=1, R=28, r=-55, u=57, v=1] [L39] EXPR counter++ VAL [A=839, counter=2, counter++=1, r=-55, R=28, u=57, v=1] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=839, counter=2, R=28, r=-55, u=57, v=1] [L41] COND TRUE !(r > 0) VAL [A=839, counter=2, r=-55, R=28, u=57, v=1] [L47] EXPR counter++ VAL [A=839, counter=3, counter++=2, R=28, r=-55, u=57, v=1] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=839, counter=3, r=-55, R=28, u=57, v=1] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [A=839, counter=3, r=2, R=28, u=59, v=1] [L47] EXPR counter++ VAL [A=839, counter=4, counter++=3, R=28, r=2, u=59, v=1] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=839, counter=4, r=2, R=28, u=59, v=1] [L49] COND TRUE !(r < 0) VAL [A=839, counter=4, R=28, r=2, u=59, v=1] [L34] EXPR counter++ VAL [A=839, counter=5, counter++=4, r=2, R=28, u=59, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=839, counter=5, R=28, r=2, u=59, v=1] [L36] COND FALSE !(!(r != 0)) VAL [A=839, counter=5, r=2, R=28, u=59, v=1] [L39] EXPR counter++ VAL [A=839, counter=6, counter++=5, r=2, R=28, u=59, v=1] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=6] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=839, counter=6, r=2, R=28, u=59, v=1] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=839, counter=6, R=28, r=1, u=59, v=3] [L39] EXPR counter++ VAL [A=839, counter=7, counter++=6, R=28, r=1, u=59, v=3] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=7] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=839, counter=7, R=28, r=1, u=59, v=3] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=839, counter=7, r=-2, R=28, u=59, v=5] [L39] EXPR counter++ VAL [A=839, counter=8, counter++=7, R=28, r=-2, u=59, v=5] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=8] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=839, counter=8, r=-2, R=28, u=59, v=5] [L41] COND TRUE !(r > 0) VAL [A=839, counter=8, r=-2, R=28, u=59, v=5] [L47] EXPR counter++ VAL [A=839, counter=9, counter++=8, r=-2, R=28, u=59, v=5] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=9] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=839, counter=9, R=28, r=-2, u=59, v=5] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [A=839, counter=9, R=28, r=57, u=61, v=5] [L47] EXPR counter++ VAL [A=839, counter=10, counter++=9, R=28, r=57, u=61, v=5] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=10] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=839, counter=10, r=57, R=28, u=61, v=5] [L49] COND TRUE !(r < 0) VAL [A=839, counter=10, R=28, r=57, u=61, v=5] [L34] EXPR counter++ VAL [A=839, counter=11, counter++=10, R=28, r=57, u=61, v=5] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=11] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=839, counter=11, R=28, r=57, u=61, v=5] [L36] COND FALSE !(!(r != 0)) VAL [A=839, counter=11, R=28, r=57, u=61, v=5] [L39] EXPR counter++ VAL [A=839, counter=12, counter++=11, r=57, R=28, u=61, v=5] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=12] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=12] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=839, counter=12, r=57, R=28, u=61, v=5] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=839, counter=12, r=52, R=28, u=61, v=7] [L39] EXPR counter++ VAL [A=839, counter=13, counter++=12, R=28, r=52, u=61, v=7] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=13] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=839, counter=13, R=28, r=52, u=61, v=7] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=839, counter=13, r=45, R=28, u=61, v=9] [L39] EXPR counter++ VAL [A=839, counter=14, counter++=13, R=28, r=45, u=61, v=9] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=14] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=14] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=839, counter=14, r=45, R=28, u=61, v=9] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=839, counter=14, r=36, R=28, u=61, v=11] [L39] EXPR counter++ VAL [A=839, counter=15, counter++=14, r=36, R=28, u=61, v=11] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=15] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=15] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=839, counter=15, R=28, r=36, u=61, v=11] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=839, counter=15, r=25, R=28, u=61, v=13] [L39] EXPR counter++ VAL [A=839, counter=16, counter++=15, r=25, R=28, u=61, v=13] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=16] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=16] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=839, counter=16, r=25, R=28, u=61, v=13] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=839, counter=16, R=28, r=12, u=61, v=15] [L39] EXPR counter++ VAL [A=839, counter=17, counter++=16, R=28, r=12, u=61, v=15] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=17] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=839, counter=17, r=12, R=28, u=61, v=15] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=839, counter=17, R=28, r=-3, u=61, v=17] [L39] EXPR counter++ VAL [A=839, counter=18, counter++=17, r=-3, R=28, u=61, v=17] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=18] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=18] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=839, counter=18, r=-3, R=28, u=61, v=17] [L41] COND TRUE !(r > 0) VAL [A=839, counter=18, r=-3, R=28, u=61, v=17] [L47] EXPR counter++ VAL [A=839, counter=19, counter++=18, r=-3, R=28, u=61, v=17] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=19] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=19] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=839, counter=19, r=-3, R=28, u=61, v=17] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [A=839, counter=19, R=28, r=58, u=63, v=17] [L47] EXPR counter++ VAL [A=839, counter=20, counter++=19, R=28, r=58, u=63, v=17] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=20] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=20] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=839, counter=20, R=28, r=58, u=63, v=17] [L49] COND TRUE !(r < 0) VAL [A=839, counter=20, R=28, r=58, u=63, v=17] [L34] EXPR counter++ VAL [A=839, counter=21, counter++=20, R=28, r=58, u=63, v=17] [L34] COND FALSE !(counter++<20) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, counter=21] [L12] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=21] [L14] reach_error() VAL [\old(cond)=0, cond=0, counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 85.7s, OverallIterations: 21, TraceHistogramMax: 21, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 60.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 mSolverCounterUnknown, 2128 SdHoareTripleChecker+Valid, 39.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2109 mSDsluCounter, 5387 SdHoareTripleChecker+Invalid, 38.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4184 mSDsCounter, 867 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3504 IncrementalHoareTripleChecker+Invalid, 4385 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 867 mSolverCounterUnsat, 1203 mSDtfsCounter, 3504 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2948 GetRequests, 2589 SyntacticMatches, 27 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 28.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1593occurred in iteration=20, InterpolantAutomatonStates: 315, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 20 MinimizatonAttempts, 1220 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 16.2s InterpolantComputationTime, 1924 NumberOfCodeBlocks, 1653 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 2807 ConstructedInterpolants, 44 QuantifiedInterpolants, 10787 SizeOfPredicates, 81 NumberOfNonLiveVariables, 3650 ConjunctsInSsa, 246 ConjunctsInUnsatCore, 32 InterpolantComputations, 8 PerfectInterpolantSequences, 8903/11070 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-02-15 11:49:06,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE