./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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/fermat2-ll_unwindbound100.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 36da946a83103a61b88f0f1db9af94484aad5eefbde5313f974f53b267bd14bf --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 02:14:48,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 02:14:48,029 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 02:14:48,061 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 02:14:48,062 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 02:14:48,064 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 02:14:48,066 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 02:14:48,068 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 02:14:48,070 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 02:14:48,073 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 02:14:48,074 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 02:14:48,076 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 02:14:48,076 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 02:14:48,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 02:14:48,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 02:14:48,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 02:14:48,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 02:14:48,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 02:14:48,082 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 02:14:48,084 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 02:14:48,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 02:14:48,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 02:14:48,087 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 02:14:48,087 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 02:14:48,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 02:14:48,095 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 02:14:48,095 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 02:14:48,097 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 02:14:48,097 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 02:14:48,097 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 02:14:48,098 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 02:14:48,098 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 02:14:48,099 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 02:14:48,101 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 02:14:48,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 02:14:48,101 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 02:14:48,102 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 02:14:48,102 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 02:14:48,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 02:14:48,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 02:14:48,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 02:14:48,104 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 02:14:48,129 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 02:14:48,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 02:14:48,129 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 02:14:48,129 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 02:14:48,130 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 02:14:48,130 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 02:14:48,131 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 02:14:48,131 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 02:14:48,131 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 02:14:48,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 02:14:48,131 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 02:14:48,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 02:14:48,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 02:14:48,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 02:14:48,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 02:14:48,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 02:14:48,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 02:14:48,132 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 02:14:48,132 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 02:14:48,132 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 02:14:48,132 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 02:14:48,132 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 02:14:48,133 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 02:14:48,133 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 02:14:48,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 02:14:48,133 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 02:14:48,133 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 02:14:48,133 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 02:14:48,133 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 02:14:48,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 02:14:48,133 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 02:14:48,134 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 02:14:48,134 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 02:14:48,134 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 02:14:48,134 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 02:14:48,134 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 36da946a83103a61b88f0f1db9af94484aad5eefbde5313f974f53b267bd14bf [2023-02-18 02:14:48,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 02:14:48,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 02:14:48,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 02:14:48,353 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 02:14:48,353 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 02:14:48,354 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2023-02-18 02:14:49,434 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 02:14:49,583 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 02:14:49,583 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2023-02-18 02:14:49,587 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fc1e4fc7/64b35b473352429d8c055690ea607cab/FLAGa8cf7a7c8 [2023-02-18 02:14:49,597 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fc1e4fc7/64b35b473352429d8c055690ea607cab [2023-02-18 02:14:49,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 02:14:49,600 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 02:14:49,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 02:14:49,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 02:14:49,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 02:14:49,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 02:14:49" (1/1) ... [2023-02-18 02:14:49,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39758ff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:14:49, skipping insertion in model container [2023-02-18 02:14:49,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 02:14:49" (1/1) ... [2023-02-18 02:14:49,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 02:14:49,622 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 02:14:49,775 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/fermat2-ll_unwindbound100.c[524,537] [2023-02-18 02:14:49,807 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 02:14:49,815 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 02:14:49,825 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/fermat2-ll_unwindbound100.c[524,537] [2023-02-18 02:14:49,840 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 02:14:49,848 INFO L208 MainTranslator]: Completed translation [2023-02-18 02:14:49,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:14:49 WrapperNode [2023-02-18 02:14:49,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 02:14:49,849 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 02:14:49,850 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 02:14:49,850 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 02:14:49,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:14:49" (1/1) ... [2023-02-18 02:14:49,858 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:14:49" (1/1) ... [2023-02-18 02:14:49,870 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 46 [2023-02-18 02:14:49,870 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 02:14:49,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 02:14:49,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 02:14:49,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 02:14:49,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:14:49" (1/1) ... [2023-02-18 02:14:49,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:14:49" (1/1) ... [2023-02-18 02:14:49,883 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:14:49" (1/1) ... [2023-02-18 02:14:49,883 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:14:49" (1/1) ... [2023-02-18 02:14:49,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:14:49" (1/1) ... [2023-02-18 02:14:49,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:14:49" (1/1) ... [2023-02-18 02:14:49,896 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:14:49" (1/1) ... [2023-02-18 02:14:49,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:14:49" (1/1) ... [2023-02-18 02:14:49,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 02:14:49,899 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 02:14:49,899 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 02:14:49,899 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 02:14:49,900 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:14:49" (1/1) ... [2023-02-18 02:14:49,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 02:14:49,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:14:49,918 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) [2023-02-18 02:14:49,941 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 [2023-02-18 02:14:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 02:14:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-18 02:14:49,945 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-18 02:14:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 02:14:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 02:14:49,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 02:14:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 02:14:49,946 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 02:14:49,987 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 02:14:49,988 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 02:14:50,118 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 02:14:50,136 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 02:14:50,136 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-18 02:14:50,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 02:14:50 BoogieIcfgContainer [2023-02-18 02:14:50,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 02:14:50,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 02:14:50,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 02:14:50,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 02:14:50,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 02:14:49" (1/3) ... [2023-02-18 02:14:50,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c4320b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 02:14:50, skipping insertion in model container [2023-02-18 02:14:50,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:14:49" (2/3) ... [2023-02-18 02:14:50,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c4320b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 02:14:50, skipping insertion in model container [2023-02-18 02:14:50,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 02:14:50" (3/3) ... [2023-02-18 02:14:50,143 INFO L112 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound100.c [2023-02-18 02:14:50,153 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 02:14:50,168 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 02:14:50,234 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 02:14:50,247 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;@6362374f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 02:14:50,248 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 02:14:50,251 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 02:14:50,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 02:14:50,257 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:14:50,258 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:14:50,258 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:14:50,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:14:50,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1086166160, now seen corresponding path program 1 times [2023-02-18 02:14:50,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:14:50,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974699391] [2023-02-18 02:14:50,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:14:50,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:14:50,354 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:14:50,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [956143614] [2023-02-18 02:14:50,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:14:50,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:14:50,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:14:50,357 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) [2023-02-18 02:14:50,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 02:14:50,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:14:50,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 02:14:50,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:14:50,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 02:14:50,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 02:14:50,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:14:50,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974699391] [2023-02-18 02:14:50,445 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:14:50,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956143614] [2023-02-18 02:14:50,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956143614] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:14:50,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:14:50,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 02:14:50,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479296351] [2023-02-18 02:14:50,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:14:50,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 02:14:50,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:14:50,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 02:14:50,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 02:14:50,492 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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) [2023-02-18 02:14:50,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:14:50,513 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2023-02-18 02:14:50,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 02:14:50,515 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 [2023-02-18 02:14:50,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:14:50,520 INFO L225 Difference]: With dead ends: 47 [2023-02-18 02:14:50,520 INFO L226 Difference]: Without dead ends: 21 [2023-02-18 02:14:50,523 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 [2023-02-18 02:14:50,527 INFO L413 NwaCegarLoop]: 29 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, 29 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 [2023-02-18 02:14:50,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 02:14:50,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-18 02:14:50,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-02-18 02:14:50,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 02:14:50,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-02-18 02:14:50,574 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 18 [2023-02-18 02:14:50,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:14:50,574 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-02-18 02:14:50,575 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) [2023-02-18 02:14:50,576 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-02-18 02:14:50,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 02:14:50,577 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:14:50,577 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:14:50,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 02:14:50,784 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 [2023-02-18 02:14:50,785 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:14:50,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:14:50,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1345709874, now seen corresponding path program 1 times [2023-02-18 02:14:50,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:14:50,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874588720] [2023-02-18 02:14:50,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:14:50,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:14:50,796 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:14:50,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328946273] [2023-02-18 02:14:50,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:14:50,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:14:50,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:14:50,823 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) [2023-02-18 02:14:50,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 02:14:50,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:14:50,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 02:14:50,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:14:50,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 02:14:50,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 02:14:50,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:14:50,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874588720] [2023-02-18 02:14:50,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:14:50,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328946273] [2023-02-18 02:14:50,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328946273] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:14:50,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:14:50,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 02:14:50,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257512880] [2023-02-18 02:14:50,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:14:50,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 02:14:50,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:14:50,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 02:14:50,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 02:14:50,933 INFO L87 Difference]: Start difference. First operand 21 states and 25 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) [2023-02-18 02:14:50,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:14:50,947 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2023-02-18 02:14:50,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 02:14:50,947 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 [2023-02-18 02:14:50,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:14:50,948 INFO L225 Difference]: With dead ends: 30 [2023-02-18 02:14:50,949 INFO L226 Difference]: Without dead ends: 23 [2023-02-18 02:14:50,949 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 [2023-02-18 02:14:50,950 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 02:14:50,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 02:14:50,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-18 02:14:50,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-02-18 02:14:50,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 02:14:50,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-02-18 02:14:50,957 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 19 [2023-02-18 02:14:50,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:14:50,958 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-02-18 02:14:50,959 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) [2023-02-18 02:14:50,959 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-02-18 02:14:50,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 02:14:50,960 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:14:50,960 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:14:50,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-18 02:14:51,165 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 [2023-02-18 02:14:51,165 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:14:51,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:14:51,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1347497334, now seen corresponding path program 1 times [2023-02-18 02:14:51,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:14:51,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165667958] [2023-02-18 02:14:51,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:14:51,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:14:51,175 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:14:51,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1475535452] [2023-02-18 02:14:51,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:14:51,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:14:51,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:14:51,178 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) [2023-02-18 02:14:51,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 02:14:51,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:14:51,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 02:14:51,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:14:51,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 02:14:51,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 02:14:51,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:14:51,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165667958] [2023-02-18 02:14:51,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:14:51,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475535452] [2023-02-18 02:14:51,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475535452] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:14:51,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:14:51,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 02:14:51,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29967631] [2023-02-18 02:14:51,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:14:51,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 02:14:51,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:14:51,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 02:14:51,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-18 02:14:51,347 INFO L87 Difference]: Start difference. First operand 23 states and 27 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) [2023-02-18 02:14:51,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:14:51,741 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2023-02-18 02:14:51,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 02:14:51,742 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 [2023-02-18 02:14:51,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:14:51,743 INFO L225 Difference]: With dead ends: 35 [2023-02-18 02:14:51,743 INFO L226 Difference]: Without dead ends: 33 [2023-02-18 02:14:51,743 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 [2023-02-18 02:14:51,744 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 02:14:51,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 79 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 02:14:51,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-18 02:14:51,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2023-02-18 02:14:51,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 02:14:51,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2023-02-18 02:14:51,752 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 19 [2023-02-18 02:14:51,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:14:51,752 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2023-02-18 02:14:51,753 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) [2023-02-18 02:14:51,753 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2023-02-18 02:14:51,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 02:14:51,753 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:14:51,753 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] [2023-02-18 02:14:51,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-18 02:14:51,958 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 [2023-02-18 02:14:51,959 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:14:51,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:14:51,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1636478750, now seen corresponding path program 1 times [2023-02-18 02:14:51,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:14:51,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896572231] [2023-02-18 02:14:51,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:14:51,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:14:51,978 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:14:51,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177621416] [2023-02-18 02:14:51,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:14:51,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:14:51,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:14:51,981 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) [2023-02-18 02:14:51,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 02:14:52,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:14:52,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 02:14:52,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:14:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 02:14:52,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:14:52,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 02:14:52,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:14:52,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896572231] [2023-02-18 02:14:52,215 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:14:52,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177621416] [2023-02-18 02:14:52,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177621416] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:14:52,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:14:52,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-02-18 02:14:52,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987439511] [2023-02-18 02:14:52,216 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:14:52,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 02:14:52,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:14:52,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 02:14:52,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-18 02:14:52,219 INFO L87 Difference]: Start difference. First operand 32 states and 39 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) [2023-02-18 02:14:52,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:14:52,298 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2023-02-18 02:14:52,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 02:14:52,299 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 [2023-02-18 02:14:52,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:14:52,300 INFO L225 Difference]: With dead ends: 39 [2023-02-18 02:14:52,300 INFO L226 Difference]: Without dead ends: 34 [2023-02-18 02:14:52,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-02-18 02:14:52,301 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 02:14:52,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 85 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 02:14:52,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-18 02:14:52,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2023-02-18 02:14:52,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 02:14:52,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-02-18 02:14:52,307 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 25 [2023-02-18 02:14:52,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:14:52,307 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-02-18 02:14:52,307 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) [2023-02-18 02:14:52,307 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-02-18 02:14:52,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 02:14:52,308 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:14:52,308 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] [2023-02-18 02:14:52,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-18 02:14:52,512 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 [2023-02-18 02:14:52,513 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:14:52,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:14:52,513 INFO L85 PathProgramCache]: Analyzing trace with hash -126969667, now seen corresponding path program 1 times [2023-02-18 02:14:52,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:14:52,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132808890] [2023-02-18 02:14:52,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:14:52,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:14:52,524 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:14:52,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [385866122] [2023-02-18 02:14:52,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:14:52,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:14:52,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:14:52,542 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) [2023-02-18 02:14:52,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 02:14:52,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:14:52,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 02:14:52,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:14:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 02:14:52,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:14:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 02:14:52,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:14:52,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132808890] [2023-02-18 02:14:52,634 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:14:52,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385866122] [2023-02-18 02:14:52,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385866122] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:14:52,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:14:52,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-18 02:14:52,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841958047] [2023-02-18 02:14:52,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:14:52,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 02:14:52,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:14:52,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 02:14:52,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-18 02:14:52,638 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-18 02:14:52,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:14:52,694 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2023-02-18 02:14:52,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 02:14:52,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 28 [2023-02-18 02:14:52,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:14:52,698 INFO L225 Difference]: With dead ends: 57 [2023-02-18 02:14:52,698 INFO L226 Difference]: Without dead ends: 52 [2023-02-18 02:14:52,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-18 02:14:52,702 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 20 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 02:14:52,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 101 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 02:14:52,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-18 02:14:52,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-02-18 02:14:52,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 02:14:52,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2023-02-18 02:14:52,738 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 28 [2023-02-18 02:14:52,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:14:52,739 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2023-02-18 02:14:52,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-18 02:14:52,739 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2023-02-18 02:14:52,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 02:14:52,740 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:14:52,740 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:14:52,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-18 02:14:52,947 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 [2023-02-18 02:14:52,948 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:14:52,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:14:52,948 INFO L85 PathProgramCache]: Analyzing trace with hash 972990450, now seen corresponding path program 2 times [2023-02-18 02:14:52,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:14:52,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052478001] [2023-02-18 02:14:52,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:14:52,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:14:52,955 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:14:52,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1059081463] [2023-02-18 02:14:52,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 02:14:52,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:14:52,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:14:52,962 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) [2023-02-18 02:14:52,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 02:14:53,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 02:14:53,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:14:53,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 02:14:53,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:14:53,075 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 02:14:53,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:14:53,131 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-18 02:14:53,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:14:53,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052478001] [2023-02-18 02:14:53,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:14:53,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059081463] [2023-02-18 02:14:53,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059081463] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:14:53,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:14:53,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-18 02:14:53,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173162822] [2023-02-18 02:14:53,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:14:53,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 02:14:53,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:14:53,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 02:14:53,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-18 02:14:53,133 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 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) [2023-02-18 02:14:53,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:14:53,256 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2023-02-18 02:14:53,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 02:14:53,256 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 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 55 [2023-02-18 02:14:53,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:14:53,257 INFO L225 Difference]: With dead ends: 111 [2023-02-18 02:14:53,257 INFO L226 Difference]: Without dead ends: 106 [2023-02-18 02:14:53,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-02-18 02:14:53,258 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 52 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 02:14:53,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 136 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 02:14:53,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-02-18 02:14:53,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2023-02-18 02:14:53,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 81 states have internal predecessors, (92), 13 states have call successors, (13), 12 states have call predecessors, (13), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-18 02:14:53,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2023-02-18 02:14:53,276 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 55 [2023-02-18 02:14:53,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:14:53,277 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2023-02-18 02:14:53,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 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) [2023-02-18 02:14:53,277 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2023-02-18 02:14:53,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-02-18 02:14:53,279 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:14:53,279 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:14:53,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 02:14:53,484 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 [2023-02-18 02:14:53,486 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:14:53,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:14:53,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1909967598, now seen corresponding path program 3 times [2023-02-18 02:14:53,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:14:53,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019496177] [2023-02-18 02:14:53,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:14:53,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:14:53,495 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:14:53,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814203808] [2023-02-18 02:14:53,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 02:14:53,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:14:53,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:14:53,504 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) [2023-02-18 02:14:53,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 02:14:53,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-02-18 02:14:53,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:14:53,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 02:14:53,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:14:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 02:14:53,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:14:54,090 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-02-18 02:14:54,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:14:54,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019496177] [2023-02-18 02:14:54,091 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:14:54,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814203808] [2023-02-18 02:14:54,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814203808] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:14:54,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:14:54,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2023-02-18 02:14:54,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977996454] [2023-02-18 02:14:54,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:14:54,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 02:14:54,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:14:54,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 02:14:54,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2023-02-18 02:14:54,097 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-02-18 02:14:54,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:14:54,518 INFO L93 Difference]: Finished difference Result 219 states and 253 transitions. [2023-02-18 02:14:54,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-18 02:14:54,519 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) Word has length 109 [2023-02-18 02:14:54,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:14:54,523 INFO L225 Difference]: With dead ends: 219 [2023-02-18 02:14:54,523 INFO L226 Difference]: Without dead ends: 214 [2023-02-18 02:14:54,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2023-02-18 02:14:54,524 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 142 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 02:14:54,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 278 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 02:14:54,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-02-18 02:14:54,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2023-02-18 02:14:54,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 165 states have (on average 1.1393939393939394) internal successors, (188), 165 states have internal predecessors, (188), 25 states have call successors, (25), 24 states have call predecessors, (25), 23 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-02-18 02:14:54,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 237 transitions. [2023-02-18 02:14:54,561 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 237 transitions. Word has length 109 [2023-02-18 02:14:54,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:14:54,561 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 237 transitions. [2023-02-18 02:14:54,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-02-18 02:14:54,561 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 237 transitions. [2023-02-18 02:14:54,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2023-02-18 02:14:54,571 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:14:54,571 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:14:54,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 02:14:54,779 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 [2023-02-18 02:14:54,780 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:14:54,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:14:54,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1216739502, now seen corresponding path program 4 times [2023-02-18 02:14:54,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:14:54,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540818022] [2023-02-18 02:14:54,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:14:54,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:14:54,791 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:14:54,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [312381588] [2023-02-18 02:14:54,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 02:14:54,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:14:54,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:14:54,809 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) [2023-02-18 02:14:54,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 02:14:54,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 02:14:54,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:14:54,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-18 02:14:54,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:14:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 2123 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 02:14:55,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:14:55,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 1199 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2023-02-18 02:14:55,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:14:55,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540818022] [2023-02-18 02:14:55,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:14:55,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312381588] [2023-02-18 02:14:55,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312381588] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:14:55,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:14:55,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2023-02-18 02:14:55,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645848160] [2023-02-18 02:14:55,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:14:55,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-18 02:14:55,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:14:55,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-18 02:14:55,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2023-02-18 02:14:55,747 INFO L87 Difference]: Start difference. First operand 214 states and 237 transitions. Second operand has 50 states, 50 states have (on average 5.28) internal successors, (264), 50 states have internal predecessors, (264), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) [2023-02-18 02:14:56,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:14:56,892 INFO L93 Difference]: Finished difference Result 435 states and 505 transitions. [2023-02-18 02:14:56,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-02-18 02:14:56,893 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.28) internal successors, (264), 50 states have internal predecessors, (264), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) Word has length 217 [2023-02-18 02:14:56,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:14:56,898 INFO L225 Difference]: With dead ends: 435 [2023-02-18 02:14:56,898 INFO L226 Difference]: Without dead ends: 430 [2023-02-18 02:14:56,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2023-02-18 02:14:56,902 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 388 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 02:14:56,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 424 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 02:14:56,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2023-02-18 02:14:56,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 430. [2023-02-18 02:14:56,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 333 states have (on average 1.1411411411411412) internal successors, (380), 333 states have internal predecessors, (380), 49 states have call successors, (49), 48 states have call predecessors, (49), 47 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2023-02-18 02:14:56,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 477 transitions. [2023-02-18 02:14:56,956 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 477 transitions. Word has length 217 [2023-02-18 02:14:56,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:14:56,957 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 477 transitions. [2023-02-18 02:14:56,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.28) internal successors, (264), 50 states have internal predecessors, (264), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) [2023-02-18 02:14:56,957 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 477 transitions. [2023-02-18 02:14:56,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2023-02-18 02:14:56,961 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:14:56,961 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:14:56,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-18 02:14:57,167 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 [2023-02-18 02:14:57,167 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:14:57,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:14:57,169 INFO L85 PathProgramCache]: Analyzing trace with hash -623866926, now seen corresponding path program 5 times [2023-02-18 02:14:57,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:14:57,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136650134] [2023-02-18 02:14:57,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:14:57,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:14:57,219 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:14:57,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717399668] [2023-02-18 02:14:57,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 02:14:57,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:14:57,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:14:57,221 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) [2023-02-18 02:14:57,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 02:14:57,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2023-02-18 02:14:57,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:14:57,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 95 conjunts are in the unsatisfiable core [2023-02-18 02:14:57,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:14:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 9407 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 02:14:58,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:15:00,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 5267 refuted. 0 times theorem prover too weak. 4144 trivial. 0 not checked. [2023-02-18 02:15:00,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:15:00,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136650134] [2023-02-18 02:15:00,659 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:15:00,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717399668] [2023-02-18 02:15:00,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717399668] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:15:00,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:15:00,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50] total 98 [2023-02-18 02:15:00,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712024437] [2023-02-18 02:15:00,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:15:00,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-02-18 02:15:00,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:15:00,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-02-18 02:15:00,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4565, Invalid=4941, Unknown=0, NotChecked=0, Total=9506 [2023-02-18 02:15:00,669 INFO L87 Difference]: Start difference. First operand 430 states and 477 transitions. Second operand has 98 states, 98 states have (on average 5.387755102040816) internal successors, (528), 98 states have internal predecessors, (528), 95 states have call successors, (97), 49 states have call predecessors, (97), 48 states have return successors, (96), 94 states have call predecessors, (96), 94 states have call successors, (96) [2023-02-18 02:15:04,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:15:04,661 INFO L93 Difference]: Finished difference Result 867 states and 1009 transitions. [2023-02-18 02:15:04,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2023-02-18 02:15:04,662 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 5.387755102040816) internal successors, (528), 98 states have internal predecessors, (528), 95 states have call successors, (97), 49 states have call predecessors, (97), 48 states have return successors, (96), 94 states have call predecessors, (96), 94 states have call successors, (96) Word has length 433 [2023-02-18 02:15:04,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:15:04,671 INFO L225 Difference]: With dead ends: 867 [2023-02-18 02:15:04,672 INFO L226 Difference]: Without dead ends: 862 [2023-02-18 02:15:04,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 768 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5452 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13540, Invalid=22750, Unknown=0, NotChecked=0, Total=36290 [2023-02-18 02:15:04,712 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 1023 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 02:15:04,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1023 Valid, 813 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 02:15:04,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2023-02-18 02:15:04,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 862. [2023-02-18 02:15:04,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 669 states have (on average 1.1420029895366217) internal successors, (764), 669 states have internal predecessors, (764), 97 states have call successors, (97), 96 states have call predecessors, (97), 95 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2023-02-18 02:15:04,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 957 transitions. [2023-02-18 02:15:04,770 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 957 transitions. Word has length 433 [2023-02-18 02:15:04,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:15:04,771 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 957 transitions. [2023-02-18 02:15:04,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 5.387755102040816) internal successors, (528), 98 states have internal predecessors, (528), 95 states have call successors, (97), 49 states have call predecessors, (97), 48 states have return successors, (96), 94 states have call predecessors, (96), 94 states have call successors, (96) [2023-02-18 02:15:04,772 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 957 transitions. [2023-02-18 02:15:04,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 866 [2023-02-18 02:15:04,787 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:15:04,788 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 94, 94, 94, 94, 94, 94, 94, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:15:04,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 02:15:04,994 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 [2023-02-18 02:15:04,994 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:15:04,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:15:04,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1106701102, now seen corresponding path program 6 times [2023-02-18 02:15:04,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:15:04,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161871995] [2023-02-18 02:15:04,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:15:04,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:15:05,029 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:15:05,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167006465] [2023-02-18 02:15:05,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 02:15:05,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:15:05,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:15:05,031 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) [2023-02-18 02:15:05,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process