./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e 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/ps4-ll_unwindbound20.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 99e5cccea54789cc7c8b01ece41ae38ca7afc8c38f73e2884988b8ff4c6bfc25 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 19:13:19,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 19:13:19,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 19:13:19,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 19:13:19,041 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 19:13:19,044 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 19:13:19,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 19:13:19,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 19:13:19,051 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 19:13:19,053 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 19:13:19,055 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 19:13:19,056 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 19:13:19,057 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 19:13:19,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 19:13:19,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 19:13:19,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 19:13:19,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 19:13:19,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 19:13:19,068 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 19:13:19,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 19:13:19,073 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 19:13:19,074 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 19:13:19,075 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 19:13:19,076 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 19:13:19,081 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 19:13:19,081 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 19:13:19,082 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 19:13:19,083 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 19:13:19,083 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 19:13:19,084 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 19:13:19,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 19:13:19,085 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 19:13:19,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 19:13:19,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 19:13:19,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 19:13:19,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 19:13:19,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 19:13:19,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 19:13:19,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 19:13:19,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 19:13:19,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 19:13:19,093 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 19:13:19,128 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 19:13:19,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 19:13:19,129 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 19:13:19,129 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 19:13:19,130 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 19:13:19,130 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 19:13:19,131 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 19:13:19,131 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 19:13:19,131 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 19:13:19,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 19:13:19,132 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 19:13:19,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 19:13:19,133 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 19:13:19,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 19:13:19,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 19:13:19,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 19:13:19,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 19:13:19,133 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 19:13:19,134 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 19:13:19,134 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 19:13:19,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 19:13:19,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 19:13:19,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 19:13:19,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 19:13:19,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 19:13:19,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 19:13:19,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 19:13:19,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 19:13:19,136 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 19:13:19,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 19:13:19,136 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 19:13:19,136 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 19:13:19,136 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 19:13:19,137 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 19:13:19,137 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 19:13:19,137 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99e5cccea54789cc7c8b01ece41ae38ca7afc8c38f73e2884988b8ff4c6bfc25 [2023-02-18 19:13:19,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 19:13:19,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 19:13:19,398 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 19:13:19,399 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 19:13:19,399 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 19:13:19,400 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c [2023-02-18 19:13:20,586 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 19:13:20,761 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 19:13:20,762 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c [2023-02-18 19:13:20,767 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43ae74c98/f95c1d582c6a47199339c1b1ed93e79f/FLAGde9c5639f [2023-02-18 19:13:20,781 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43ae74c98/f95c1d582c6a47199339c1b1ed93e79f [2023-02-18 19:13:20,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 19:13:20,785 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 19:13:20,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 19:13:20,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 19:13:20,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 19:13:20,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 07:13:20" (1/1) ... [2023-02-18 19:13:20,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e034382 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:13:20, skipping insertion in model container [2023-02-18 19:13:20,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 07:13:20" (1/1) ... [2023-02-18 19:13:20,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 19:13:20,808 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 19:13:20,931 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/ps4-ll_unwindbound20.c[458,471] [2023-02-18 19:13:20,943 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 19:13:20,951 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 19:13:20,962 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/ps4-ll_unwindbound20.c[458,471] [2023-02-18 19:13:20,967 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 19:13:20,977 INFO L208 MainTranslator]: Completed translation [2023-02-18 19:13:20,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:13:20 WrapperNode [2023-02-18 19:13:20,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 19:13:20,978 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 19:13:20,978 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 19:13:20,978 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 19:13:20,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:13:20" (1/1) ... [2023-02-18 19:13:20,987 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:13:20" (1/1) ... [2023-02-18 19:13:20,999 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 39 [2023-02-18 19:13:21,000 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 19:13:21,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 19:13:21,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 19:13:21,001 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 19:13:21,008 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:13:20" (1/1) ... [2023-02-18 19:13:21,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:13:20" (1/1) ... [2023-02-18 19:13:21,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:13:20" (1/1) ... [2023-02-18 19:13:21,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:13:20" (1/1) ... [2023-02-18 19:13:21,015 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:13:20" (1/1) ... [2023-02-18 19:13:21,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:13:20" (1/1) ... [2023-02-18 19:13:21,020 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:13:20" (1/1) ... [2023-02-18 19:13:21,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:13:20" (1/1) ... [2023-02-18 19:13:21,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 19:13:21,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 19:13:21,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 19:13:21,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 19:13:21,023 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:13:20" (1/1) ... [2023-02-18 19:13:21,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 19:13:21,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:13:21,051 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 19:13:21,068 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 19:13:21,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 19:13:21,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 19:13:21,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 19:13:21,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 19:13:21,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 19:13:21,098 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 19:13:21,158 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 19:13:21,159 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 19:13:21,253 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 19:13:21,258 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 19:13:21,258 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-18 19:13:21,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 07:13:21 BoogieIcfgContainer [2023-02-18 19:13:21,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 19:13:21,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 19:13:21,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 19:13:21,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 19:13:21,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 07:13:20" (1/3) ... [2023-02-18 19:13:21,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f65308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 07:13:21, skipping insertion in model container [2023-02-18 19:13:21,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:13:20" (2/3) ... [2023-02-18 19:13:21,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f65308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 07:13:21, skipping insertion in model container [2023-02-18 19:13:21,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 07:13:21" (3/3) ... [2023-02-18 19:13:21,268 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound20.c [2023-02-18 19:13:21,294 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 19:13:21,294 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 19:13:21,328 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 19:13:21,333 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;@24c024a3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 19:13:21,333 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 19:13:21,341 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 19:13:21,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 19:13:21,348 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:13:21,348 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 19:13:21,349 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:13:21,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:13:21,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1819788390, now seen corresponding path program 1 times [2023-02-18 19:13:21,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:13:21,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095168066] [2023-02-18 19:13:21,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:13:21,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:13:21,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:13:21,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:13:21,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095168066] [2023-02-18 19:13:21,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 19:13:21,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134347952] [2023-02-18 19:13:21,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:13:21,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:13:21,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:13:21,451 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 19:13:21,453 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 19:13:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:13:21,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 19:13:21,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:13:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 19:13:21,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 19:13:21,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134347952] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 19:13:21,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 19:13:21,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 19:13:21,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967171725] [2023-02-18 19:13:21,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 19:13:21,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 19:13:21,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:13:21,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 19:13:21,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 19:13:21,557 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 19:13:21,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:13:21,573 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2023-02-18 19:13:21,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 19:13:21,575 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-18 19:13:21,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:13:21,581 INFO L225 Difference]: With dead ends: 34 [2023-02-18 19:13:21,581 INFO L226 Difference]: Without dead ends: 14 [2023-02-18 19:13:21,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 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 19:13:21,586 INFO L413 NwaCegarLoop]: 21 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, 21 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 19:13:21,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 19:13:21,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-02-18 19:13:21,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-02-18 19:13:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 19:13:21,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2023-02-18 19:13:21,616 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 7 [2023-02-18 19:13:21,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:13:21,616 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2023-02-18 19:13:21,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 19:13:21,617 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2023-02-18 19:13:21,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 19:13:21,618 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:13:21,618 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 19:13:21,640 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 19:13:21,827 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 19:13:21,827 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:13:21,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:13:21,828 INFO L85 PathProgramCache]: Analyzing trace with hash 178441499, now seen corresponding path program 1 times [2023-02-18 19:13:21,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:13:21,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530405993] [2023-02-18 19:13:21,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:13:21,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:13:21,859 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:13:21,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995962511] [2023-02-18 19:13:21,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:13:21,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:13:21,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:13:21,863 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 19:13:21,867 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 19:13:21,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:13:21,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 19:13:21,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:13:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 19:13:21,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 19:13:21,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:13:21,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530405993] [2023-02-18 19:13:21,975 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:13:21,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995962511] [2023-02-18 19:13:21,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995962511] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 19:13:21,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 19:13:21,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 19:13:21,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91439671] [2023-02-18 19:13:21,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 19:13:21,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 19:13:21,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:13:21,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 19:13:21,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 19:13:21,983 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 19:13:22,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:13:22,012 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2023-02-18 19:13:22,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 19:13:22,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-18 19:13:22,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:13:22,013 INFO L225 Difference]: With dead ends: 24 [2023-02-18 19:13:22,013 INFO L226 Difference]: Without dead ends: 16 [2023-02-18 19:13:22,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 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 19:13:22,015 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 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 19:13:22,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 19:13:22,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-02-18 19:13:22,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-02-18 19:13:22,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 19:13:22,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2023-02-18 19:13:22,020 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 8 [2023-02-18 19:13:22,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:13:22,020 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2023-02-18 19:13:22,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 19:13:22,021 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2023-02-18 19:13:22,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 19:13:22,021 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:13:22,021 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 19:13:22,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 19:13:22,222 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 19:13:22,222 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:13:22,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:13:22,223 INFO L85 PathProgramCache]: Analyzing trace with hash 180228959, now seen corresponding path program 1 times [2023-02-18 19:13:22,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:13:22,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519114332] [2023-02-18 19:13:22,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:13:22,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:13:22,237 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:13:22,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062401226] [2023-02-18 19:13:22,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:13:22,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:13:22,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:13:22,240 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 19:13:22,250 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 19:13:22,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:13:22,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 19:13:22,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:13:22,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 19:13:22,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 19:13:22,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:13:22,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519114332] [2023-02-18 19:13:22,308 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:13:22,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062401226] [2023-02-18 19:13:22,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062401226] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 19:13:22,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 19:13:22,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 19:13:22,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868263350] [2023-02-18 19:13:22,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 19:13:22,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 19:13:22,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:13:22,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 19:13:22,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 19:13:22,310 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 19:13:22,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:13:22,351 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2023-02-18 19:13:22,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 19:13:22,353 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-18 19:13:22,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:13:22,354 INFO L225 Difference]: With dead ends: 26 [2023-02-18 19:13:22,354 INFO L226 Difference]: Without dead ends: 22 [2023-02-18 19:13:22,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 19:13:22,358 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 19:13:22,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 48 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 19:13:22,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-18 19:13:22,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-18 19:13:22,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 16 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 19:13:22,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-02-18 19:13:22,378 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 8 [2023-02-18 19:13:22,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:13:22,378 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-02-18 19:13:22,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 19:13:22,378 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-02-18 19:13:22,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 19:13:22,380 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:13:22,380 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 19:13:22,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 19:13:22,585 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 19:13:22,586 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:13:22,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:13:22,586 INFO L85 PathProgramCache]: Analyzing trace with hash 823572993, now seen corresponding path program 1 times [2023-02-18 19:13:22,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:13:22,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271246527] [2023-02-18 19:13:22,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:13:22,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:13:22,597 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:13:22,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579362248] [2023-02-18 19:13:22,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:13:22,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:13:22,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:13:22,607 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 19:13:22,609 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 19:13:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:13:22,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 19:13:22,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:13:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 19:13:22,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 19:13:22,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 19:13:22,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:13:22,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271246527] [2023-02-18 19:13:22,715 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:13:22,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579362248] [2023-02-18 19:13:22,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579362248] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 19:13:22,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 19:13:22,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-18 19:13:22,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773954234] [2023-02-18 19:13:22,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 19:13:22,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 19:13:22,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:13:22,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 19:13:22,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-18 19:13:22,718 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 19:13:22,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:13:22,800 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2023-02-18 19:13:22,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 19:13:22,803 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-02-18 19:13:22,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:13:22,804 INFO L225 Difference]: With dead ends: 56 [2023-02-18 19:13:22,804 INFO L226 Difference]: Without dead ends: 48 [2023-02-18 19:13:22,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 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 19:13:22,805 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 19:13:22,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 90 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 19:13:22,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-18 19:13:22,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2023-02-18 19:13:22,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 32 states have internal predecessors, (36), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-18 19:13:22,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2023-02-18 19:13:22,821 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 16 [2023-02-18 19:13:22,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:13:22,823 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2023-02-18 19:13:22,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 19:13:22,824 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2023-02-18 19:13:22,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 19:13:22,824 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:13:22,824 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 19:13:22,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 19:13:23,031 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 19:13:23,032 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:13:23,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:13:23,032 INFO L85 PathProgramCache]: Analyzing trace with hash 825360453, now seen corresponding path program 1 times [2023-02-18 19:13:23,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:13:23,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260001442] [2023-02-18 19:13:23,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:13:23,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:13:23,041 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:13:23,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102937083] [2023-02-18 19:13:23,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:13:23,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:13:23,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:13:23,043 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 19:13:23,047 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 19:13:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:13:23,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 19:13:23,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:13:23,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 19:13:23,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 19:13:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 19:13:23,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:13:23,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260001442] [2023-02-18 19:13:23,483 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:13:23,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102937083] [2023-02-18 19:13:23,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102937083] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 19:13:23,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 19:13:23,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-02-18 19:13:23,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688569060] [2023-02-18 19:13:23,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 19:13:23,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 19:13:23,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:13:23,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 19:13:23,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-18 19:13:23,486 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 19:13:23,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:13:23,587 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2023-02-18 19:13:23,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 19:13:23,588 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-02-18 19:13:23,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:13:23,589 INFO L225 Difference]: With dead ends: 58 [2023-02-18 19:13:23,589 INFO L226 Difference]: Without dead ends: 47 [2023-02-18 19:13:23,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-02-18 19:13:23,590 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 19:13:23,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 69 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 19:13:23,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-18 19:13:23,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2023-02-18 19:13:23,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 19:13:23,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2023-02-18 19:13:23,599 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 16 [2023-02-18 19:13:23,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:13:23,599 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2023-02-18 19:13:23,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 19:13:23,600 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2023-02-18 19:13:23,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 19:13:23,600 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:13:23,600 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 19:13:23,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 19:13:23,806 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 19:13:23,807 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:13:23,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:13:23,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1696898494, now seen corresponding path program 1 times [2023-02-18 19:13:23,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:13:23,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824019501] [2023-02-18 19:13:23,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:13:23,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:13:23,825 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:13:23,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216271168] [2023-02-18 19:13:23,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:13:23,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:13:23,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:13:23,844 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 19:13:23,847 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 19:13:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:13:23,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 19:13:23,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:13:23,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 19:13:23,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 19:13:24,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:13:24,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824019501] [2023-02-18 19:13:24,151 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:13:24,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216271168] [2023-02-18 19:13:24,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216271168] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 19:13:24,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 19:13:24,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-02-18 19:13:24,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853925910] [2023-02-18 19:13:24,152 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 19:13:24,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 19:13:24,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:13:24,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 19:13:24,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-02-18 19:13:24,154 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 19:13:24,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:13:24,278 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2023-02-18 19:13:24,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 19:13:24,279 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-02-18 19:13:24,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:13:24,281 INFO L225 Difference]: With dead ends: 46 [2023-02-18 19:13:24,281 INFO L226 Difference]: Without dead ends: 41 [2023-02-18 19:13:24,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-02-18 19:13:24,283 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 19:13:24,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 65 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 19:13:24,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-18 19:13:24,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-02-18 19:13:24,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 19:13:24,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2023-02-18 19:13:24,299 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 22 [2023-02-18 19:13:24,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:13:24,299 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2023-02-18 19:13:24,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 19:13:24,300 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2023-02-18 19:13:24,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 19:13:24,304 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:13:24,304 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2023-02-18 19:13:24,312 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 19:13:24,510 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 19:13:24,510 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:13:24,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:13:24,511 INFO L85 PathProgramCache]: Analyzing trace with hash -47987544, now seen corresponding path program 2 times [2023-02-18 19:13:24,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:13:24,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647306667] [2023-02-18 19:13:24,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:13:24,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:13:24,520 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:13:24,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200750807] [2023-02-18 19:13:24,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 19:13:24,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:13:24,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:13:24,522 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 19:13:24,525 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 19:13:24,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 19:13:24,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 19:13:24,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 19:13:24,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:13:24,644 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 19:13:24,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 19:13:26,771 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= 0 (let ((.cse0 (+ 1 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|))))) is different from false [2023-02-18 19:13:26,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:13:26,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647306667] [2023-02-18 19:13:26,773 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:13:26,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200750807] [2023-02-18 19:13:26,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200750807] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 19:13:26,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 19:13:26,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-02-18 19:13:26,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225679918] [2023-02-18 19:13:26,774 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 19:13:26,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 19:13:26,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:13:26,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 19:13:26,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=148, Unknown=1, NotChecked=24, Total=210 [2023-02-18 19:13:26,775 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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 19:13:26,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:13:26,880 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2023-02-18 19:13:26,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 19:13:26,880 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) Word has length 30 [2023-02-18 19:13:26,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:13:26,881 INFO L225 Difference]: With dead ends: 46 [2023-02-18 19:13:26,881 INFO L226 Difference]: Without dead ends: 41 [2023-02-18 19:13:26,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=56, Invalid=219, Unknown=1, NotChecked=30, Total=306 [2023-02-18 19:13:26,882 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 19:13:26,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 85 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 19:13:26,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-18 19:13:26,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-02-18 19:13:26,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 19:13:26,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2023-02-18 19:13:26,889 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 30 [2023-02-18 19:13:26,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:13:26,889 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2023-02-18 19:13:26,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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 19:13:26,890 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2023-02-18 19:13:26,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 19:13:26,890 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:13:26,891 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2023-02-18 19:13:26,899 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 19:13:27,099 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 19:13:27,099 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:13:27,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:13:27,100 INFO L85 PathProgramCache]: Analyzing trace with hash -584163058, now seen corresponding path program 3 times [2023-02-18 19:13:27,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:13:27,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383199801] [2023-02-18 19:13:27,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:13:27,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:13:27,107 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:13:27,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416671223] [2023-02-18 19:13:27,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 19:13:27,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:13:27,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:13:27,110 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 19:13:27,112 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 19:13:27,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 19:13:27,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 19:13:27,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-18 19:13:27,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:13:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 19:13:27,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 19:13:41,385 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| Int)) (or (= (mod (+ (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19|)) 4) 0) (= 0 (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19|) (- (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19|))))))) is different from true [2023-02-18 19:13:47,420 WARN L859 $PredicateComparison]: unable to prove that (or (= 0 c___VERIFIER_assert_~cond) (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| Int)) (or (= (mod (+ (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19|)) 4) 0) (= 0 (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19|) (- (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19|))))))) is different from true [2023-02-18 19:13:51,444 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= 0 (let ((.cse0 (+ 1 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ 1 |c_ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~k~0#1|) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|))))) is different from false [2023-02-18 19:13:51,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:13:51,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383199801] [2023-02-18 19:13:51,454 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:13:51,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416671223] [2023-02-18 19:13:51,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416671223] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 19:13:51,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 19:13:51,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-02-18 19:13:51,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044132406] [2023-02-18 19:13:51,454 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 19:13:51,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 19:13:51,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:13:51,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 19:13:51,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=170, Unknown=6, NotChecked=84, Total=306 [2023-02-18 19:13:51,456 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 19:13:51,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:13:51,582 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2023-02-18 19:13:51,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 19:13:51,583 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2023-02-18 19:13:51,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:13:51,583 INFO L225 Difference]: With dead ends: 48 [2023-02-18 19:13:51,584 INFO L226 Difference]: Without dead ends: 43 [2023-02-18 19:13:51,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=66, Invalid=246, Unknown=6, NotChecked=102, Total=420 [2023-02-18 19:13:51,584 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 19:13:51,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 113 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 19:13:51,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-18 19:13:51,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-02-18 19:13:51,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 19:13:51,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2023-02-18 19:13:51,591 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2023-02-18 19:13:51,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:13:51,592 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2023-02-18 19:13:51,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 19:13:51,592 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2023-02-18 19:13:51,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 19:13:51,593 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:13:51,593 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-02-18 19:13:51,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 19:13:51,793 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 19:13:51,794 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:13:51,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:13:51,794 INFO L85 PathProgramCache]: Analyzing trace with hash 2045303987, now seen corresponding path program 2 times [2023-02-18 19:13:51,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:13:51,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743953946] [2023-02-18 19:13:51,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:13:51,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:13:51,802 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:13:51,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1761110241] [2023-02-18 19:13:51,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 19:13:51,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:13:51,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:13:51,808 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 19:13:51,810 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 19:13:51,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 19:13:51,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 19:13:51,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 19:13:51,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:13:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 19:13:51,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 19:13:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 19:13:51,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:13:51,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743953946] [2023-02-18 19:13:51,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:13:51,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761110241] [2023-02-18 19:13:51,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761110241] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 19:13:51,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 19:13:51,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-18 19:13:51,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477194631] [2023-02-18 19:13:51,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 19:13:51,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 19:13:51,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:13:51,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 19:13:51,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-18 19:13:51,945 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 19:13:52,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:13:52,097 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2023-02-18 19:13:52,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 19:13:52,097 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 40 [2023-02-18 19:13:52,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:13:52,100 INFO L225 Difference]: With dead ends: 119 [2023-02-18 19:13:52,100 INFO L226 Difference]: Without dead ends: 114 [2023-02-18 19:13:52,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 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 19:13:52,102 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 55 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 19:13:52,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 116 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 19:13:52,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-02-18 19:13:52,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 89. [2023-02-18 19:13:52,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 67 states have internal predecessors, (74), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 19:13:52,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2023-02-18 19:13:52,123 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 40 [2023-02-18 19:13:52,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:13:52,123 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2023-02-18 19:13:52,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 19:13:52,124 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2023-02-18 19:13:52,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 19:13:52,130 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:13:52,131 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2023-02-18 19:13:52,143 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 19:13:52,338 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 19:13:52,338 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:13:52,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:13:52,339 INFO L85 PathProgramCache]: Analyzing trace with hash -635357324, now seen corresponding path program 4 times [2023-02-18 19:13:52,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:13:52,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453972896] [2023-02-18 19:13:52,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:13:52,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:13:52,345 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:13:52,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380208229] [2023-02-18 19:13:52,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 19:13:52,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:13:52,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:13:52,347 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 19:13:52,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 19:13:52,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 19:13:52,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 19:13:52,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 19:13:52,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:13:52,507 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 18 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-18 19:13:52,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 19:13:54,604 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= 0 (let ((.cse0 (+ 1 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|))))) is different from false [2023-02-18 19:13:54,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:13:54,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453972896] [2023-02-18 19:13:54,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:13:54,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380208229] [2023-02-18 19:13:54,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380208229] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 19:13:54,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 19:13:54,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-02-18 19:13:54,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291083638] [2023-02-18 19:13:54,606 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 19:13:54,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 19:13:54,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:13:54,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 19:13:54,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=200, Unknown=1, NotChecked=28, Total=272 [2023-02-18 19:13:54,607 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 19:13:54,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:13:54,782 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2023-02-18 19:13:54,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 19:13:54,783 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 46 [2023-02-18 19:13:54,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:13:54,784 INFO L225 Difference]: With dead ends: 94 [2023-02-18 19:13:54,784 INFO L226 Difference]: Without dead ends: 89 [2023-02-18 19:13:54,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=62, Invalid=283, Unknown=1, NotChecked=34, Total=380 [2023-02-18 19:13:54,785 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 19:13:54,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 159 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 19:13:54,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-18 19:13:54,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-02-18 19:13:54,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 67 states have internal predecessors, (73), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 19:13:54,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2023-02-18 19:13:54,796 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 46 [2023-02-18 19:13:54,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:13:54,796 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2023-02-18 19:13:54,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 19:13:54,796 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2023-02-18 19:13:54,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-18 19:13:54,797 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:13:54,797 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1] [2023-02-18 19:13:54,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-18 19:13:55,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-18 19:13:55,003 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:13:55,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:13:55,004 INFO L85 PathProgramCache]: Analyzing trace with hash 220350426, now seen corresponding path program 5 times [2023-02-18 19:13:55,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:13:55,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307781691] [2023-02-18 19:13:55,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:13:55,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:13:55,015 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:13:55,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135683205] [2023-02-18 19:13:55,019 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 19:13:55,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:13:55,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:13:55,020 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 19:13:55,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 19:13:55,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-18 19:13:55,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 19:13:55,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 19:13:55,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:13:55,192 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 17 proven. 70 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-18 19:13:55,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 19:13:55,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:13:55,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307781691] [2023-02-18 19:13:55,316 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:13:55,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135683205] [2023-02-18 19:13:55,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135683205] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 19:13:55,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 19:13:55,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-02-18 19:13:55,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551644357] [2023-02-18 19:13:55,316 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 19:13:55,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 19:13:55,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:13:55,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 19:13:55,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-02-18 19:13:55,318 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 19:13:55,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:13:55,515 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2023-02-18 19:13:55,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 19:13:55,515 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 54 [2023-02-18 19:13:55,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:13:55,516 INFO L225 Difference]: With dead ends: 94 [2023-02-18 19:13:55,516 INFO L226 Difference]: Without dead ends: 89 [2023-02-18 19:13:55,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-02-18 19:13:55,517 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 19:13:55,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 197 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 19:13:55,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-18 19:13:55,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-02-18 19:13:55,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 19:13:55,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2023-02-18 19:13:55,526 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 54 [2023-02-18 19:13:55,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:13:55,526 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2023-02-18 19:13:55,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 19:13:55,526 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2023-02-18 19:13:55,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-18 19:13:55,527 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:13:55,527 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2023-02-18 19:13:55,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 19:13:55,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-18 19:13:55,733 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:13:55,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:13:55,734 INFO L85 PathProgramCache]: Analyzing trace with hash 156734016, now seen corresponding path program 6 times [2023-02-18 19:13:55,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:13:55,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432179148] [2023-02-18 19:13:55,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:13:55,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:13:55,741 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:13:55,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1184787830] [2023-02-18 19:13:55,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 19:13:55,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:13:55,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:13:55,743 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 19:13:55,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 19:13:55,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-18 19:13:55,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 19:13:55,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-18 19:13:55,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:13:55,932 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 16 proven. 100 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-18 19:13:55,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 19:14:06,207 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_28| Int)) (or (= (mod (+ (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48|)) 4) 0) (= 0 (let ((.cse0 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48|))))))) (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_28| .cse0) (- (* .cse0 .cse0)))))))) is different from true [2023-02-18 19:14:12,227 WARN L859 $PredicateComparison]: unable to prove that (or (= 0 c___VERIFIER_assert_~cond) (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_28| Int)) (or (= (mod (+ (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48|)) 4) 0) (= 0 (let ((.cse0 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48|))))))) (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_28| .cse0) (- (* .cse0 .cse0)))))))) is different from true [2023-02-18 19:14:16,244 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (let ((.cse1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 |c_ULTIMATE.start_main_~c~0#1|))))))) (or (= 0 (let ((.cse0 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 |c_ULTIMATE.start_main_~y~0#1|)))))))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ .cse1 1) |ULTIMATE.start_main_~k~0#1|) (not (< .cse1 |ULTIMATE.start_main_~k~0#1|)) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)))))) is different from false [2023-02-18 19:14:16,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:14:16,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432179148] [2023-02-18 19:14:16,250 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:14:16,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184787830] [2023-02-18 19:14:16,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184787830] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 19:14:16,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 19:14:16,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-02-18 19:14:16,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000185467] [2023-02-18 19:14:16,251 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 19:14:16,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 19:14:16,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:14:16,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 19:14:16,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=418, Unknown=5, NotChecked=132, Total=650 [2023-02-18 19:14:16,252 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-18 19:14:16,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:14:16,489 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2023-02-18 19:14:16,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 19:14:16,490 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 62 [2023-02-18 19:14:16,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:14:16,491 INFO L225 Difference]: With dead ends: 94 [2023-02-18 19:14:16,491 INFO L226 Difference]: Without dead ends: 89 [2023-02-18 19:14:16,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=114, Invalid=543, Unknown=5, NotChecked=150, Total=812 [2023-02-18 19:14:16,492 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 19:14:16,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 221 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 19:14:16,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-18 19:14:16,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-02-18 19:14:16,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 19:14:16,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2023-02-18 19:14:16,506 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 62 [2023-02-18 19:14:16,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:14:16,507 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2023-02-18 19:14:16,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-18 19:14:16,507 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2023-02-18 19:14:16,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-18 19:14:16,509 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:14:16,509 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1] [2023-02-18 19:14:16,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 19:14:16,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-18 19:14:16,715 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:14:16,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:14:16,715 INFO L85 PathProgramCache]: Analyzing trace with hash -605612378, now seen corresponding path program 7 times [2023-02-18 19:14:16,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:14:16,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462308965] [2023-02-18 19:14:16,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:14:16,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:14:16,729 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:14:16,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465979625] [2023-02-18 19:14:16,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 19:14:16,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:14:16,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:14:16,730 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 19:14:16,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 19:14:16,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:14:16,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-18 19:14:16,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:14:17,364 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 36 proven. 113 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-18 19:14:17,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 19:14:19,413 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (= 0 (+ (* |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~y~0#1|) (- (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))))) is different from false [2023-02-18 19:14:23,432 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_31| Int)) (or (= 0 (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_31| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58|) (- (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58|)))) (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58|)) 4) 0))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2023-02-18 19:14:29,449 WARN L859 $PredicateComparison]: unable to prove that (or (= 0 c___VERIFIER_assert_~cond) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_31| Int)) (or (= 0 (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_31| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58|) (- (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58|)))) (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_58|)) 4) 0))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2023-02-18 19:14:33,835 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= 0 (let ((.cse0 (+ 1 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ 1 |c_ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~k~0#1|) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|))))) is different from false [2023-02-18 19:14:33,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:14:33,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462308965] [2023-02-18 19:14:33,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:14:33,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465979625] [2023-02-18 19:14:33,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465979625] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 19:14:33,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 19:14:33,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-18 19:14:33,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297533661] [2023-02-18 19:14:33,840 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 19:14:33,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 19:14:33,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:14:33,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 19:14:33,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=269, Unknown=4, NotChecked=140, Total=462 [2023-02-18 19:14:33,842 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 19:14:34,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:14:34,096 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2023-02-18 19:14:34,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 19:14:34,096 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 70 [2023-02-18 19:14:34,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:14:34,097 INFO L225 Difference]: With dead ends: 94 [2023-02-18 19:14:34,097 INFO L226 Difference]: Without dead ends: 89 [2023-02-18 19:14:34,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=68, Invalid=364, Unknown=4, NotChecked=164, Total=600 [2023-02-18 19:14:34,098 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 19:14:34,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 265 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 19:14:34,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-18 19:14:34,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-02-18 19:14:34,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 19:14:34,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2023-02-18 19:14:34,107 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 70 [2023-02-18 19:14:34,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:14:34,108 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2023-02-18 19:14:34,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 19:14:34,109 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2023-02-18 19:14:34,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-02-18 19:14:34,111 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:14:34,111 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1] [2023-02-18 19:14:34,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 19:14:34,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-18 19:14:34,317 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:14:34,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:14:34,318 INFO L85 PathProgramCache]: Analyzing trace with hash 200725772, now seen corresponding path program 8 times [2023-02-18 19:14:34,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:14:34,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304967279] [2023-02-18 19:14:34,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:14:34,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:14:34,324 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:14:34,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1850541068] [2023-02-18 19:14:34,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 19:14:34,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:14:34,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:14:34,325 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 19:14:34,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 19:14:34,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 19:14:34,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 19:14:34,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-18 19:14:34,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:14:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 38 proven. 148 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-18 19:14:34,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 19:14:36,592 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= 0 (let ((.cse0 (+ 1 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|))))) is different from false [2023-02-18 19:14:36,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:14:36,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304967279] [2023-02-18 19:14:36,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:14:36,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850541068] [2023-02-18 19:14:36,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850541068] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 19:14:36,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 19:14:36,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-02-18 19:14:36,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760697749] [2023-02-18 19:14:36,595 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 19:14:36,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 19:14:36,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:14:36,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 19:14:36,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=328, Unknown=1, NotChecked=36, Total=420 [2023-02-18 19:14:36,596 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-18 19:14:36,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:14:36,879 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2023-02-18 19:14:36,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 19:14:36,880 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 78 [2023-02-18 19:14:36,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:14:36,880 INFO L225 Difference]: With dead ends: 94 [2023-02-18 19:14:36,880 INFO L226 Difference]: Without dead ends: 89 [2023-02-18 19:14:36,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=74, Invalid=435, Unknown=1, NotChecked=42, Total=552 [2023-02-18 19:14:36,881 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 19:14:36,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 335 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 19:14:36,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-18 19:14:36,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-02-18 19:14:36,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 19:14:36,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2023-02-18 19:14:36,890 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 78 [2023-02-18 19:14:36,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:14:36,890 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2023-02-18 19:14:36,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-18 19:14:36,891 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2023-02-18 19:14:36,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-02-18 19:14:36,891 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:14:36,892 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1] [2023-02-18 19:14:36,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 19:14:37,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:14:37,100 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:14:37,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:14:37,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1699951246, now seen corresponding path program 9 times [2023-02-18 19:14:37,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:14:37,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652392101] [2023-02-18 19:14:37,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:14:37,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:14:37,107 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:14:37,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1704726393] [2023-02-18 19:14:37,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 19:14:37,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:14:37,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:14:37,109 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 19:14:37,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 19:14:37,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-02-18 19:14:37,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 19:14:37,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-18 19:14:37,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:14:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 40 proven. 187 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-18 19:14:37,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 19:14:37,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:14:37,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652392101] [2023-02-18 19:14:37,491 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:14:37,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704726393] [2023-02-18 19:14:37,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704726393] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 19:14:37,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 19:14:37,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-02-18 19:14:37,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802165269] [2023-02-18 19:14:37,492 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 19:14:37,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 19:14:37,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:14:37,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 19:14:37,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2023-02-18 19:14:37,493 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 17 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 19:14:37,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:14:37,805 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2023-02-18 19:14:37,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 19:14:37,805 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 86 [2023-02-18 19:14:37,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:14:37,806 INFO L225 Difference]: With dead ends: 96 [2023-02-18 19:14:37,806 INFO L226 Difference]: Without dead ends: 91 [2023-02-18 19:14:37,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2023-02-18 19:14:37,807 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 19:14:37,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 365 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 19:14:37,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-18 19:14:37,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-02-18 19:14:37,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-18 19:14:37,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2023-02-18 19:14:37,816 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2023-02-18 19:14:37,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:14:37,816 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2023-02-18 19:14:37,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 19:14:37,817 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2023-02-18 19:14:37,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-02-18 19:14:37,817 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:14:37,817 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2023-02-18 19:14:37,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-18 19:14:38,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-18 19:14:38,026 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:14:38,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:14:38,026 INFO L85 PathProgramCache]: Analyzing trace with hash -780287977, now seen corresponding path program 3 times [2023-02-18 19:14:38,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:14:38,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319260557] [2023-02-18 19:14:38,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:14:38,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:14:38,033 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:14:38,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [793859026] [2023-02-18 19:14:38,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 19:14:38,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:14:38,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:14:38,036 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 19:14:38,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 19:14:38,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-02-18 19:14:38,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 19:14:38,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 19:14:38,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:14:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 19:14:38,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 19:14:38,340 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-02-18 19:14:38,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:14:38,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319260557] [2023-02-18 19:14:38,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:14:38,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793859026] [2023-02-18 19:14:38,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793859026] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 19:14:38,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 19:14:38,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2023-02-18 19:14:38,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770854298] [2023-02-18 19:14:38,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 19:14:38,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 19:14:38,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:14:38,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 19:14:38,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2023-02-18 19:14:38,344 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 24 states, 24 states have (on average 4.208333333333333) internal successors, (101), 24 states have internal predecessors, (101), 20 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2023-02-18 19:14:38,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:14:38,672 INFO L93 Difference]: Finished difference Result 219 states and 229 transitions. [2023-02-18 19:14:38,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-18 19:14:38,673 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.208333333333333) internal successors, (101), 24 states have internal predecessors, (101), 20 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 88 [2023-02-18 19:14:38,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:14:38,674 INFO L225 Difference]: With dead ends: 219 [2023-02-18 19:14:38,674 INFO L226 Difference]: Without dead ends: 214 [2023-02-18 19:14:38,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=665, Invalid=1141, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 19:14:38,675 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 174 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 19:14:38,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 186 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 19:14:38,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-02-18 19:14:38,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 169. [2023-02-18 19:14:38,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 127 states have (on average 1.0866141732283465) internal successors, (138), 127 states have internal predecessors, (138), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-18 19:14:38,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 179 transitions. [2023-02-18 19:14:38,691 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 179 transitions. Word has length 88 [2023-02-18 19:14:38,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:14:38,691 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 179 transitions. [2023-02-18 19:14:38,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.208333333333333) internal successors, (101), 24 states have internal predecessors, (101), 20 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2023-02-18 19:14:38,691 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 179 transitions. [2023-02-18 19:14:38,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-02-18 19:14:38,692 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:14:38,692 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1] [2023-02-18 19:14:38,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-18 19:14:38,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-18 19:14:38,892 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:14:38,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:14:38,893 INFO L85 PathProgramCache]: Analyzing trace with hash 53411800, now seen corresponding path program 10 times [2023-02-18 19:14:38,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:14:38,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305284775] [2023-02-18 19:14:38,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:14:38,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:14:38,899 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:14:38,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1663333608] [2023-02-18 19:14:38,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 19:14:38,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:14:38,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:14:38,900 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 19:14:38,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-18 19:14:39,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 19:14:39,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 19:14:39,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-18 19:14:39,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:14:39,318 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 24 proven. 248 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-18 19:14:39,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 19:14:39,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:14:39,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305284775] [2023-02-18 19:14:39,407 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:14:39,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663333608] [2023-02-18 19:14:39,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663333608] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 19:14:39,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 19:14:39,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-02-18 19:14:39,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169809684] [2023-02-18 19:14:39,408 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 19:14:39,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 19:14:39,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:14:39,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 19:14:39,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2023-02-18 19:14:39,409 INFO L87 Difference]: Start difference. First operand 169 states and 179 transitions. Second operand has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-18 19:14:39,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:14:39,749 INFO L93 Difference]: Finished difference Result 174 states and 183 transitions. [2023-02-18 19:14:39,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 19:14:39,749 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 94 [2023-02-18 19:14:39,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:14:39,751 INFO L225 Difference]: With dead ends: 174 [2023-02-18 19:14:39,751 INFO L226 Difference]: Without dead ends: 169 [2023-02-18 19:14:39,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2023-02-18 19:14:39,752 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 19:14:39,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 421 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 19:14:39,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-02-18 19:14:39,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2023-02-18 19:14:39,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 127 states have (on average 1.078740157480315) internal successors, (137), 127 states have internal predecessors, (137), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-18 19:14:39,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 178 transitions. [2023-02-18 19:14:39,765 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 178 transitions. Word has length 94 [2023-02-18 19:14:39,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:14:39,765 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 178 transitions. [2023-02-18 19:14:39,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-18 19:14:39,766 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 178 transitions. [2023-02-18 19:14:39,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-02-18 19:14:39,766 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:14:39,767 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1] [2023-02-18 19:14:39,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-18 19:14:39,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-18 19:14:39,973 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:14:39,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:14:39,974 INFO L85 PathProgramCache]: Analyzing trace with hash 983788606, now seen corresponding path program 11 times [2023-02-18 19:14:39,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:14:39,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89181125] [2023-02-18 19:14:39,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:14:39,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:14:39,980 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:14:39,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926551738] [2023-02-18 19:14:39,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 19:14:39,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:14:39,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:14:39,982 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 19:14:39,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-18 19:14:40,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-02-18 19:14:40,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 19:14:40,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-18 19:14:40,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:14:40,352 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 26 proven. 295 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-18 19:14:40,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 19:14:40,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:14:40,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89181125] [2023-02-18 19:14:40,466 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:14:40,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926551738] [2023-02-18 19:14:40,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926551738] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 19:14:40,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 19:14:40,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-02-18 19:14:40,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051638571] [2023-02-18 19:14:40,467 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 19:14:40,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 19:14:40,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:14:40,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 19:14:40,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2023-02-18 19:14:40,468 INFO L87 Difference]: Start difference. First operand 169 states and 178 transitions. Second operand has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-18 19:14:40,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:14:40,833 INFO L93 Difference]: Finished difference Result 174 states and 182 transitions. [2023-02-18 19:14:40,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 19:14:40,837 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 102 [2023-02-18 19:14:40,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:14:40,838 INFO L225 Difference]: With dead ends: 174 [2023-02-18 19:14:40,838 INFO L226 Difference]: Without dead ends: 169 [2023-02-18 19:14:40,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2023-02-18 19:14:40,839 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 19:14:40,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 481 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 19:14:40,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-02-18 19:14:40,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2023-02-18 19:14:40,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 127 states have (on average 1.0708661417322836) internal successors, (136), 127 states have internal predecessors, (136), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-18 19:14:40,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 177 transitions. [2023-02-18 19:14:40,860 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 177 transitions. Word has length 102 [2023-02-18 19:14:40,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:14:40,860 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 177 transitions. [2023-02-18 19:14:40,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-18 19:14:40,860 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 177 transitions. [2023-02-18 19:14:40,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-02-18 19:14:40,861 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:14:40,861 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1] [2023-02-18 19:14:40,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-18 19:14:41,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-18 19:14:41,062 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:14:41,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:14:41,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1339026780, now seen corresponding path program 12 times [2023-02-18 19:14:41,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:14:41,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64721633] [2023-02-18 19:14:41,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:14:41,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:14:41,068 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:14:41,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135036477] [2023-02-18 19:14:41,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 19:14:41,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:14:41,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:14:41,070 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 19:14:41,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-18 19:14:41,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-02-18 19:14:41,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 19:14:41,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-18 19:14:41,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:14:41,400 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 40 proven. 334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-18 19:14:41,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 19:14:41,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:14:41,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64721633] [2023-02-18 19:14:41,504 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:14:41,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135036477] [2023-02-18 19:14:41,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135036477] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 19:14:41,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 19:14:41,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-18 19:14:41,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223070495] [2023-02-18 19:14:41,505 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 19:14:41,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 19:14:41,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:14:41,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 19:14:41,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2023-02-18 19:14:41,506 INFO L87 Difference]: Start difference. First operand 169 states and 177 transitions. Second operand has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-18 19:14:41,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:14:41,934 INFO L93 Difference]: Finished difference Result 174 states and 181 transitions. [2023-02-18 19:14:41,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 19:14:41,934 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 110 [2023-02-18 19:14:41,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:14:41,935 INFO L225 Difference]: With dead ends: 174 [2023-02-18 19:14:41,935 INFO L226 Difference]: Without dead ends: 169 [2023-02-18 19:14:41,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2023-02-18 19:14:41,936 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 19:14:41,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 545 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 19:14:41,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-02-18 19:14:41,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2023-02-18 19:14:41,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 127 states have (on average 1.062992125984252) internal successors, (135), 127 states have internal predecessors, (135), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-18 19:14:41,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 176 transitions. [2023-02-18 19:14:41,949 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 176 transitions. Word has length 110 [2023-02-18 19:14:41,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:14:41,950 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 176 transitions. [2023-02-18 19:14:41,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-18 19:14:41,950 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 176 transitions. [2023-02-18 19:14:41,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-02-18 19:14:41,951 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:14:41,951 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1] [2023-02-18 19:14:41,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-18 19:14:42,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:14:42,159 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:14:42,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:14:42,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1291514634, now seen corresponding path program 13 times [2023-02-18 19:14:42,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:14:42,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014349393] [2023-02-18 19:14:42,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:14:42,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:14:42,166 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:14:42,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380224272] [2023-02-18 19:14:42,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 19:14:42,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:14:42,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:14:42,167 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 19:14:42,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-18 19:14:42,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:14:42,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-18 19:14:42,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:14:44,417 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 1 11))) (and (< .cse0 |c_ULTIMATE.start_main_~k~0#1|) (= |c_ULTIMATE.start_main_~y~0#1| (+ 1 (+ 1 (+ 1 10)))) (<= |c_ULTIMATE.start_main_~c~0#1| (+ 1 .cse0)) (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0))) is different from true [2023-02-18 19:14:44,462 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 66 proven. 352 refuted. 0 times theorem prover too weak. 325 trivial. 13 not checked. [2023-02-18 19:14:44,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 19:15:16,621 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_49| Int)) (or (= 0 (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_49| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139|) (- (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139|)))) (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139|)) 4) 0))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2023-02-18 19:15:22,672 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_49| Int)) (or (= 0 (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_49| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139|) (- (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139|)))) (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139|)) 4) 0))) (= 0 c___VERIFIER_assert_~cond) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2023-02-18 19:15:26,685 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= 0 (let ((.cse0 (+ 1 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|))))) is different from false [2023-02-18 19:15:26,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:15:26,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014349393] [2023-02-18 19:15:26,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:15:26,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380224272] [2023-02-18 19:15:26,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380224272] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 19:15:26,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 19:15:26,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-02-18 19:15:26,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109879426] [2023-02-18 19:15:26,689 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 19:15:26,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 19:15:26,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:15:26,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 19:15:26,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=533, Unknown=15, NotChecked=196, Total=812 [2023-02-18 19:15:26,691 INFO L87 Difference]: Start difference. First operand 169 states and 176 transitions. Second operand has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-18 19:15:28,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 19:15:30,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 19:15:33,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 19:15:35,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 19:15:37,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 19:15:39,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 19:15:39,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:15:39,245 INFO L93 Difference]: Finished difference Result 174 states and 180 transitions. [2023-02-18 19:15:39,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 19:15:39,245 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 118 [2023-02-18 19:15:39,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:15:39,247 INFO L225 Difference]: With dead ends: 174 [2023-02-18 19:15:39,247 INFO L226 Difference]: Without dead ends: 169 [2023-02-18 19:15:39,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 36.3s TimeCoverageRelationStatistics Valid=81, Invalid=622, Unknown=15, NotChecked=212, Total=930 [2023-02-18 19:15:39,248 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2023-02-18 19:15:39,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 613 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 838 Invalid, 6 Unknown, 81 Unchecked, 12.5s Time] [2023-02-18 19:15:39,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-02-18 19:15:39,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2023-02-18 19:15:39,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 127 states have (on average 1.0551181102362204) internal successors, (134), 127 states have internal predecessors, (134), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-18 19:15:39,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 175 transitions. [2023-02-18 19:15:39,262 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 175 transitions. Word has length 118 [2023-02-18 19:15:39,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:15:39,263 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 175 transitions. [2023-02-18 19:15:39,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-18 19:15:39,264 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 175 transitions. [2023-02-18 19:15:39,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-02-18 19:15:39,265 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:15:39,265 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1] [2023-02-18 19:15:39,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-18 19:15:39,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:15:39,469 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:15:39,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:15:39,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1948913008, now seen corresponding path program 14 times [2023-02-18 19:15:39,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:15:39,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325569274] [2023-02-18 19:15:39,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:15:39,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:15:39,476 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:15:39,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525910415] [2023-02-18 19:15:39,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 19:15:39,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:15:39,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:15:39,478 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 19:15:39,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-18 19:15:39,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 19:15:39,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 19:15:39,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-18 19:15:39,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:15:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 68 proven. 424 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-02-18 19:15:39,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 19:15:42,020 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= 0 (let ((.cse0 (+ 1 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|))))) is different from false [2023-02-18 19:15:42,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:15:42,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325569274] [2023-02-18 19:15:42,022 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:15:42,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525910415] [2023-02-18 19:15:42,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525910415] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 19:15:42,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 19:15:42,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-02-18 19:15:42,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873425679] [2023-02-18 19:15:42,023 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 19:15:42,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 19:15:42,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:15:42,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 19:15:42,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=580, Unknown=1, NotChecked=48, Total=702 [2023-02-18 19:15:42,024 INFO L87 Difference]: Start difference. First operand 169 states and 175 transitions. Second operand has 22 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-18 19:15:42,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:15:42,706 INFO L93 Difference]: Finished difference Result 174 states and 179 transitions. [2023-02-18 19:15:42,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 19:15:42,706 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 126 [2023-02-18 19:15:42,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:15:42,707 INFO L225 Difference]: With dead ends: 174 [2023-02-18 19:15:42,707 INFO L226 Difference]: Without dead ends: 169 [2023-02-18 19:15:42,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=92, Invalid=723, Unknown=1, NotChecked=54, Total=870 [2023-02-18 19:15:42,708 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 19:15:42,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 719 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 19:15:42,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-02-18 19:15:42,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2023-02-18 19:15:42,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 127 states have (on average 1.047244094488189) internal successors, (133), 127 states have internal predecessors, (133), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-18 19:15:42,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 174 transitions. [2023-02-18 19:15:42,736 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 174 transitions. Word has length 126 [2023-02-18 19:15:42,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:15:42,738 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 174 transitions. [2023-02-18 19:15:42,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-18 19:15:42,738 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 174 transitions. [2023-02-18 19:15:42,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-02-18 19:15:42,739 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:15:42,739 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1] [2023-02-18 19:15:42,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-18 19:15:42,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:15:42,947 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:15:42,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:15:42,947 INFO L85 PathProgramCache]: Analyzing trace with hash 48456150, now seen corresponding path program 15 times [2023-02-18 19:15:42,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:15:42,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462011721] [2023-02-18 19:15:42,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:15:42,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:15:42,955 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:15:42,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [255741054] [2023-02-18 19:15:42,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 19:15:42,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:15:42,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:15:42,957 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 19:15:42,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-18 19:15:43,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-02-18 19:15:43,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 19:15:43,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 76 conjunts are in the unsatisfiable core [2023-02-18 19:15:43,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:15:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 64 proven. 493 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-02-18 19:15:43,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 19:15:44,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:15:44,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462011721] [2023-02-18 19:15:44,071 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:15:44,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255741054] [2023-02-18 19:15:44,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255741054] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 19:15:44,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 19:15:44,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-02-18 19:15:44,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659109323] [2023-02-18 19:15:44,072 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 19:15:44,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 19:15:44,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:15:44,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 19:15:44,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2023-02-18 19:15:44,073 INFO L87 Difference]: Start difference. First operand 169 states and 174 transitions. Second operand has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-18 19:15:44,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:15:44,796 INFO L93 Difference]: Finished difference Result 174 states and 178 transitions. [2023-02-18 19:15:44,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 19:15:44,798 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 134 [2023-02-18 19:15:44,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:15:44,799 INFO L225 Difference]: With dead ends: 174 [2023-02-18 19:15:44,800 INFO L226 Difference]: Without dead ends: 169 [2023-02-18 19:15:44,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2023-02-18 19:15:44,801 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 7 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 19:15:44,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 761 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 19:15:44,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-02-18 19:15:44,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2023-02-18 19:15:44,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 127 states have (on average 1.0393700787401574) internal successors, (132), 127 states have internal predecessors, (132), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-18 19:15:44,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 173 transitions. [2023-02-18 19:15:44,816 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 173 transitions. Word has length 134 [2023-02-18 19:15:44,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:15:44,817 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 173 transitions. [2023-02-18 19:15:44,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-18 19:15:44,817 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 173 transitions. [2023-02-18 19:15:44,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-02-18 19:15:44,818 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:15:44,818 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1] [2023-02-18 19:15:44,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-02-18 19:15:45,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:15:45,025 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:15:45,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:15:45,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1347219516, now seen corresponding path program 16 times [2023-02-18 19:15:45,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:15:45,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883265672] [2023-02-18 19:15:45,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:15:45,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:15:45,032 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:15:45,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284463758] [2023-02-18 19:15:45,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 19:15:45,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:15:45,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:15:45,034 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 19:15:45,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-18 19:15:45,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 19:15:45,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 19:15:45,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 81 conjunts are in the unsatisfiable core [2023-02-18 19:15:45,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:15:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 39 proven. 587 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2023-02-18 19:15:46,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 19:16:15,097 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_87| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_207| Int)) (or (= 0 (let ((.cse0 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_207|)))))))))))))))) (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_87| .cse0) (- (* .cse0 .cse0))))) (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_207| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_207|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_207| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_207| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_207| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_207|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_207| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_207| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_207|)) 4) 0)))) is different from true [2023-02-18 19:16:21,111 WARN L859 $PredicateComparison]: unable to prove that (or (= 0 c___VERIFIER_assert_~cond) (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_87| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_207| Int)) (or (= 0 (let ((.cse0 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_207|)))))))))))))))) (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_87| .cse0) (- (* .cse0 .cse0))))) (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_207| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_207|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_207| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_207| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_207| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_207|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_207| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_207| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_207|)) 4) 0)))) is different from true [2023-02-18 19:16:25,124 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 |c_ULTIMATE.start_main_~c~0#1|)))))))))))))))) (or (= 0 (let ((.cse0 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 |c_ULTIMATE.start_main_~y~0#1|))))))))))))))))) (+ (* |c_ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (< (+ .cse1 1) |c_ULTIMATE.start_main_~k~0#1|) (not (< .cse1 |c_ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 19:16:27,144 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (let ((.cse0 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 |c_ULTIMATE.start_main_~c~0#1|))))))))))))))))) (or (not (< .cse0 |ULTIMATE.start_main_~k~0#1|)) (= 0 (let ((.cse1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 (+ 1 |c_ULTIMATE.start_main_~y~0#1|)))))))))))))))))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse1) (- (* .cse1 .cse1))))) (< (+ .cse0 1) |ULTIMATE.start_main_~k~0#1|) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)))))) is different from false [2023-02-18 19:16:27,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:16:27,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883265672] [2023-02-18 19:16:27,149 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:16:27,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284463758] [2023-02-18 19:16:27,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284463758] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 19:16:27,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 19:16:27,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-02-18 19:16:27,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769093247] [2023-02-18 19:16:27,149 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 19:16:27,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 19:16:27,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:16:27,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 19:16:27,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1391, Unknown=8, NotChecked=332, Total=2070 [2023-02-18 19:16:27,151 INFO L87 Difference]: Start difference. First operand 169 states and 173 transitions. Second operand has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-02-18 19:16:27,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:16:27,953 INFO L93 Difference]: Finished difference Result 174 states and 177 transitions. [2023-02-18 19:16:27,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 19:16:27,954 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 142 [2023-02-18 19:16:27,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:16:27,955 INFO L225 Difference]: With dead ends: 174 [2023-02-18 19:16:27,955 INFO L226 Difference]: Without dead ends: 169 [2023-02-18 19:16:27,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 229 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 33.6s TimeCoverageRelationStatistics Valid=358, Invalid=1630, Unknown=8, NotChecked=356, Total=2352 [2023-02-18 19:16:27,956 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 19:16:27,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 879 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 19:16:27,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-02-18 19:16:27,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2023-02-18 19:16:27,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 127 states have (on average 1.031496062992126) internal successors, (131), 127 states have internal predecessors, (131), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-18 19:16:27,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 172 transitions. [2023-02-18 19:16:27,970 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 172 transitions. Word has length 142 [2023-02-18 19:16:27,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:16:27,970 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 172 transitions. [2023-02-18 19:16:27,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-02-18 19:16:27,971 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 172 transitions. [2023-02-18 19:16:27,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-02-18 19:16:27,971 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:16:27,972 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1] [2023-02-18 19:16:27,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-02-18 19:16:28,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:16:28,182 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:16:28,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:16:28,182 INFO L85 PathProgramCache]: Analyzing trace with hash 764197026, now seen corresponding path program 17 times [2023-02-18 19:16:28,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:16:28,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720404144] [2023-02-18 19:16:28,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:16:28,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:16:28,190 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:16:28,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75511399] [2023-02-18 19:16:28,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 19:16:28,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:16:28,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:16:28,192 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 19:16:28,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-18 19:16:32,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2023-02-18 19:16:32,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 19:16:32,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 84 conjunts are in the unsatisfiable core [2023-02-18 19:16:32,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:16:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 62 proven. 637 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2023-02-18 19:16:32,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 19:16:32,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:16:32,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720404144] [2023-02-18 19:16:32,750 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:16:32,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75511399] [2023-02-18 19:16:32,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75511399] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 19:16:32,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 19:16:32,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-02-18 19:16:32,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226885605] [2023-02-18 19:16:32,751 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 19:16:32,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-18 19:16:32,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:16:32,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-18 19:16:32,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2023-02-18 19:16:32,753 INFO L87 Difference]: Start difference. First operand 169 states and 172 transitions. Second operand has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-02-18 19:16:33,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:16:33,536 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2023-02-18 19:16:33,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-18 19:16:33,537 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 150 [2023-02-18 19:16:33,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:16:33,538 INFO L225 Difference]: With dead ends: 174 [2023-02-18 19:16:33,538 INFO L226 Difference]: Without dead ends: 169 [2023-02-18 19:16:33,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2023-02-18 19:16:33,539 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 6 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 1400 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 1400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 19:16:33,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 965 Invalid, 1400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1400 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 19:16:33,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-02-18 19:16:33,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2023-02-18 19:16:33,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 127 states have (on average 1.0236220472440944) internal successors, (130), 127 states have internal predecessors, (130), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-18 19:16:33,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2023-02-18 19:16:33,551 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 150 [2023-02-18 19:16:33,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:16:33,552 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2023-02-18 19:16:33,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-02-18 19:16:33,552 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2023-02-18 19:16:33,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-02-18 19:16:33,553 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:16:33,553 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1] [2023-02-18 19:16:33,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-18 19:16:33,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:16:33,754 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:16:33,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:16:33,754 INFO L85 PathProgramCache]: Analyzing trace with hash -439829752, now seen corresponding path program 18 times [2023-02-18 19:16:33,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:16:33,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92412472] [2023-02-18 19:16:33,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:16:33,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:16:33,764 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:16:33,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269794075] [2023-02-18 19:16:33,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 19:16:33,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:16:33,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:16:33,765 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 19:16:33,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-18 19:16:34,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2023-02-18 19:16:34,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 19:16:34,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 88 conjunts are in the unsatisfiable core [2023-02-18 19:16:34,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:16:36,348 WARN L859 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~y~0#1| (+ 1 12)) (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0) (= (+ (+ |c_ULTIMATE.start_main_~c~0#1| (- 1)) (- 1)) (+ 1 10))) is different from true [2023-02-18 19:16:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 76 proven. 682 refuted. 0 times theorem prover too weak. 630 trivial. 18 not checked. [2023-02-18 19:16:36,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 19:16:36,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:16:36,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92412472] [2023-02-18 19:16:36,604 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:16:36,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269794075] [2023-02-18 19:16:36,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269794075] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 19:16:36,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 19:16:36,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-02-18 19:16:36,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994312413] [2023-02-18 19:16:36,605 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 19:16:36,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 19:16:36,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:16:36,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 19:16:36,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=788, Unknown=1, NotChecked=56, Total=930 [2023-02-18 19:16:36,607 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-18 19:16:37,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:16:37,453 INFO L93 Difference]: Finished difference Result 174 states and 175 transitions. [2023-02-18 19:16:37,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-18 19:16:37,453 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 158 [2023-02-18 19:16:37,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:16:37,454 INFO L225 Difference]: With dead ends: 174 [2023-02-18 19:16:37,454 INFO L226 Difference]: Without dead ends: 169 [2023-02-18 19:16:37,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=104, Invalid=955, Unknown=1, NotChecked=62, Total=1122 [2023-02-18 19:16:37,455 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 6 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 19:16:37,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1055 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1533 Invalid, 0 Unknown, 108 Unchecked, 0.8s Time] [2023-02-18 19:16:37,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-02-18 19:16:37,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2023-02-18 19:16:37,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-18 19:16:37,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2023-02-18 19:16:37,469 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 158 [2023-02-18 19:16:37,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:16:37,469 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2023-02-18 19:16:37,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-18 19:16:37,469 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2023-02-18 19:16:37,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-02-18 19:16:37,470 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:16:37,470 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1] [2023-02-18 19:16:37,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-18 19:16:37,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-18 19:16:37,678 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:16:37,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:16:37,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1042741102, now seen corresponding path program 19 times [2023-02-18 19:16:37,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:16:37,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038623947] [2023-02-18 19:16:37,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:16:37,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:16:37,685 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:16:37,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601899756] [2023-02-18 19:16:37,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 19:16:37,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:16:37,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:16:37,686 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 19:16:37,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-18 19:16:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 19:16:37,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 92 conjunts are in the unsatisfiable core [2023-02-18 19:16:37,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 19:16:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 96 proven. 761 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2023-02-18 19:16:38,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 19:16:40,379 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (= 0 (+ (* |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~y~0#1|) (- (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))))) is different from false [2023-02-18 19:16:44,396 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_97| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_271| Int)) (or (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_271| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_271|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_271| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_271| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_271|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_271| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_271| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_271| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_271|)) 4) 0) (= 0 (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_97| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_271|) (- (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_271| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_271|)))))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2023-02-18 19:16:50,411 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_97| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_271| Int)) (or (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_271| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_271|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_271| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_271| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_271|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_271| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_271| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_271| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_271|)) 4) 0) (= 0 (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_97| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_271|) (- (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_271| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_271|)))))) (= 0 c___VERIFIER_assert_~cond) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2023-02-18 19:16:54,431 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* 3 |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= 0 (let ((.cse0 (+ 1 |c_ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0))))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|))))) is different from false [2023-02-18 19:16:54,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 19:16:54,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038623947] [2023-02-18 19:16:54,435 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 19:16:54,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601899756] [2023-02-18 19:16:54,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601899756] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 19:16:54,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 19:16:54,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-02-18 19:16:54,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243357695] [2023-02-18 19:16:54,436 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 19:16:54,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 19:16:54,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 19:16:54,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 19:16:54,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=809, Unknown=4, NotChecked=236, Total=1122 [2023-02-18 19:16:54,438 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 26 states have internal predecessors, (71), 21 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-18 19:16:55,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 19:16:55,314 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2023-02-18 19:16:55,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-18 19:16:55,315 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 26 states have internal predecessors, (71), 21 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 166 [2023-02-18 19:16:55,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 19:16:55,316 INFO L225 Difference]: With dead ends: 176 [2023-02-18 19:16:55,316 INFO L226 Difference]: Without dead ends: 171 [2023-02-18 19:16:55,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=92, Invalid=976, Unknown=4, NotChecked=260, Total=1332 [2023-02-18 19:16:55,317 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 7 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 1607 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 19:16:55,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1105 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1607 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 19:16:55,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-02-18 19:16:55,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2023-02-18 19:16:55,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 22 states have call successors, (22), 21 states have call predecessors, (22), 20 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-18 19:16:55,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2023-02-18 19:16:55,335 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 166 [2023-02-18 19:16:55,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 19:16:55,335 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2023-02-18 19:16:55,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 26 states have internal predecessors, (71), 21 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-18 19:16:55,336 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2023-02-18 19:16:55,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-02-18 19:16:55,337 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 19:16:55,337 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2023-02-18 19:16:55,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-02-18 19:16:55,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-18 19:16:55,545 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 19:16:55,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 19:16:55,545 INFO L85 PathProgramCache]: Analyzing trace with hash 2132106003, now seen corresponding path program 4 times [2023-02-18 19:16:55,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 19:16:55,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473083553] [2023-02-18 19:16:55,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 19:16:55,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 19:16:55,560 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 19:16:55,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142896758] [2023-02-18 19:16:55,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 19:16:55,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 19:16:55,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 19:16:55,562 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 19:16:55,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-18 19:16:55,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 19:16:55,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-02-18 19:16:55,997 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-18 19:16:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 19:16:56,461 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-18 19:16:56,462 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-18 19:16:56,463 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-18 19:16:56,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-18 19:16:56,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-18 19:16:56,675 INFO L445 BasicCegarLoop]: Path program histogram: [19, 4, 1, 1, 1, 1] [2023-02-18 19:16:56,678 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-18 19:16:56,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.02 07:16:56 BoogieIcfgContainer [2023-02-18 19:16:56,739 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-18 19:16:56,739 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-18 19:16:56,740 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-18 19:16:56,740 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-18 19:16:56,740 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 07:13:21" (3/4) ... [2023-02-18 19:16:56,742 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-18 19:16:56,814 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-18 19:16:56,814 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-18 19:16:56,815 INFO L158 Benchmark]: Toolchain (without parser) took 216030.45ms. Allocated memory was 107.0MB in the beginning and 142.6MB in the end (delta: 35.7MB). Free memory was 63.1MB in the beginning and 78.0MB in the end (delta: -14.9MB). Peak memory consumption was 22.5MB. Max. memory is 16.1GB. [2023-02-18 19:16:56,815 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 107.0MB. Free memory is still 81.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 19:16:56,815 INFO L158 Benchmark]: CACSL2BoogieTranslator took 191.88ms. Allocated memory is still 107.0MB. Free memory was 62.8MB in the beginning and 52.6MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-18 19:16:56,816 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.06ms. Allocated memory is still 107.0MB. Free memory was 52.6MB in the beginning and 50.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 19:16:56,816 INFO L158 Benchmark]: Boogie Preprocessor took 21.22ms. Allocated memory is still 107.0MB. Free memory was 50.9MB in the beginning and 49.9MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 19:16:56,816 INFO L158 Benchmark]: RCFGBuilder took 237.90ms. Allocated memory was 107.0MB in the beginning and 142.6MB in the end (delta: 35.7MB). Free memory was 49.9MB in the beginning and 112.4MB in the end (delta: -62.5MB). Peak memory consumption was 13.6MB. Max. memory is 16.1GB. [2023-02-18 19:16:56,816 INFO L158 Benchmark]: TraceAbstraction took 215476.71ms. Allocated memory is still 142.6MB. Free memory was 111.7MB in the beginning and 84.3MB in the end (delta: 27.4MB). Peak memory consumption was 27.8MB. Max. memory is 16.1GB. [2023-02-18 19:16:56,821 INFO L158 Benchmark]: Witness Printer took 75.15ms. Allocated memory is still 142.6MB. Free memory was 84.3MB in the beginning and 78.0MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-02-18 19:16:56,822 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 107.0MB. Free memory is still 81.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 191.88ms. Allocated memory is still 107.0MB. Free memory was 62.8MB in the beginning and 52.6MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.06ms. Allocated memory is still 107.0MB. Free memory was 52.6MB in the beginning and 50.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.22ms. Allocated memory is still 107.0MB. Free memory was 50.9MB in the beginning and 49.9MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 237.90ms. Allocated memory was 107.0MB in the beginning and 142.6MB in the end (delta: 35.7MB). Free memory was 49.9MB in the beginning and 112.4MB in the end (delta: -62.5MB). Peak memory consumption was 13.6MB. Max. memory is 16.1GB. * TraceAbstraction took 215476.71ms. Allocated memory is still 142.6MB. Free memory was 111.7MB in the beginning and 84.3MB in the end (delta: 27.4MB). Peak memory consumption was 27.8MB. Max. memory is 16.1GB. * Witness Printer took 75.15ms. Allocated memory is still 142.6MB. Free memory was 84.3MB in the beginning and 78.0MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [c=0, counter=0, k=21, x=0, y=0] [L27] EXPR counter++ VAL [c=0, counter=1, counter++=0, k=21, x=0, y=0] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=1] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=0, counter=1, k=21, x=0, y=0] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=1, counter=1, k=21, x=1, y=1] [L27] EXPR counter++ VAL [c=1, counter=2, counter++=1, k=21, x=1, y=1] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=2] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=1, counter=2, k=21, x=1, y=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=2, counter=2, k=21, x=9, y=2] [L27] EXPR counter++ VAL [c=2, counter=3, counter++=2, k=21, x=9, y=2] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=3] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=2, counter=3, k=21, x=9, y=2] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=3, counter=3, k=21, x=36, y=3] [L27] EXPR counter++ VAL [c=3, counter=4, counter++=3, k=21, x=36, y=3] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=4] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=3, counter=4, k=21, x=36, y=3] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=4, counter=4, k=21, x=100, y=4] [L27] EXPR counter++ VAL [c=4, counter=5, counter++=4, k=21, x=100, y=4] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=5] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=4, counter=5, k=21, x=100, y=4] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=5, counter=5, k=21, x=225, y=5] [L27] EXPR counter++ VAL [c=5, counter=6, counter++=5, k=21, x=225, y=5] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=6] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=5, counter=6, k=21, x=225, y=5] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=6, counter=6, k=21, x=441, y=6] [L27] EXPR counter++ VAL [c=6, counter=7, counter++=6, k=21, x=441, y=6] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=7] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=6, counter=7, k=21, x=441, y=6] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=7, counter=7, k=21, x=784, y=7] [L27] EXPR counter++ VAL [c=7, counter=8, counter++=7, k=21, x=784, y=7] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=8] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=7, counter=8, k=21, x=784, y=7] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=8, counter=8, k=21, x=1296, y=8] [L27] EXPR counter++ VAL [c=8, counter=9, counter++=8, k=21, x=1296, y=8] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=9] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=8, counter=9, k=21, x=1296, y=8] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=9, counter=9, k=21, x=2025, y=9] [L27] EXPR counter++ VAL [c=9, counter=10, counter++=9, k=21, x=2025, y=9] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=10] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=9, counter=10, k=21, x=2025, y=9] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=10, counter=10, k=21, x=3025, y=10] [L27] EXPR counter++ VAL [c=10, counter=11, counter++=10, k=21, x=3025, y=10] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=11] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=10, counter=11, k=21, x=3025, y=10] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=11, counter=11, k=21, x=4356, y=11] [L27] EXPR counter++ VAL [c=11, counter=12, counter++=11, k=21, x=4356, y=11] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=12] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=12] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=11, counter=12, k=21, x=4356, y=11] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=12, counter=12, k=21, x=6084, y=12] [L27] EXPR counter++ VAL [c=12, counter=13, counter++=12, k=21, x=6084, y=12] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=13] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=12, counter=13, k=21, x=6084, y=12] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=13, counter=13, k=21, x=8281, y=13] [L27] EXPR counter++ VAL [c=13, counter=14, counter++=13, k=21, x=8281, y=13] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=14] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=14] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=13, counter=14, k=21, x=8281, y=13] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=14, counter=14, k=21, x=11025, y=14] [L27] EXPR counter++ VAL [c=14, counter=15, counter++=14, k=21, x=11025, y=14] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=15] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=15] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=14, counter=15, k=21, x=11025, y=14] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=15, counter=15, k=21, x=14400, y=15] [L27] EXPR counter++ VAL [c=15, counter=16, counter++=15, k=21, x=14400, y=15] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=16] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=16] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=15, counter=16, k=21, x=14400, y=15] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=16, counter=16, k=21, x=18496, y=16] [L27] EXPR counter++ VAL [c=16, counter=17, counter++=16, k=21, x=18496, y=16] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=17] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=16, counter=17, k=21, x=18496, y=16] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=17, counter=17, k=21, x=23409, y=17] [L27] EXPR counter++ VAL [c=17, counter=18, counter++=17, k=21, x=23409, y=17] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=18] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=18] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=17, counter=18, k=21, x=23409, y=17] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=18, counter=18, k=21, x=29241, y=18] [L27] EXPR counter++ VAL [c=18, counter=19, counter++=18, k=21, x=29241, y=18] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=19] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=19] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=18, counter=19, k=21, x=29241, y=18] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=19, counter=19, k=21, x=36100, y=19] [L27] EXPR counter++ VAL [c=19, counter=20, counter++=19, k=21, x=36100, y=19] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=20] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=20] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=19, counter=20, k=21, x=36100, y=19] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=20, counter=20, k=21, x=44100, y=20] [L27] EXPR counter++ VAL [c=20, counter=21, counter++=20, k=21, x=44100, y=20] [L27] COND FALSE !(counter++<20) [L37] CALL __VERIFIER_assert(k*y - (y*y) == 0) VAL [\old(cond)=0, counter=21] [L10] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=21] [L12] reach_error() VAL [\old(cond)=0, cond=0, counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 215.4s, OverallIterations: 27, TraceHistogramMax: 21, PathProgramHistogramMax: 19, EmptinessCheckTime: 0.0s, AutomataDifference: 21.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 420 SdHoareTripleChecker+Valid, 19.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 412 mSDsluCounter, 9920 SdHoareTripleChecker+Invalid, 18.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 189 IncrementalHoareTripleChecker+Unchecked, 9022 mSDsCounter, 53 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13723 IncrementalHoareTripleChecker+Invalid, 13971 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 53 mSolverCounterUnsat, 898 mSDtfsCounter, 13723 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2617 GetRequests, 2017 SyntacticMatches, 29 SemanticMatches, 571 ConstructedPredicates, 27 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 130.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=171occurred in iteration=26, InterpolantAutomatonStates: 437, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 26 MinimizatonAttempts, 80 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 7.8s SatisfiabilityAnalysisTime, 178.8s InterpolantComputationTime, 2144 NumberOfCodeBlocks, 2144 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2099 ConstructedInterpolants, 0 QuantifiedInterpolants, 17480 SizeOfPredicates, 115 NumberOfNonLiveVariables, 5786 ConjunctsInSsa, 1144 ConjunctsInUnsatCore, 30 InterpolantComputations, 3 PerfectInterpolantSequences, 5775/12004 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-02-18 19:16:56,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE