./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.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 787aa3251fe70c0757344936f9e5c92841f1fb61138cb758df556e9684a50783 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 03:56:38,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 03:56:38,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 03:56:38,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 03:56:38,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 03:56:38,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 03:56:38,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 03:56:38,128 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 03:56:38,130 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 03:56:38,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 03:56:38,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 03:56:38,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 03:56:38,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 03:56:38,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 03:56:38,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 03:56:38,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 03:56:38,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 03:56:38,143 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 03:56:38,144 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 03:56:38,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 03:56:38,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 03:56:38,151 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 03:56:38,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 03:56:38,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 03:56:38,155 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 03:56:38,156 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 03:56:38,156 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 03:56:38,156 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 03:56:38,157 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 03:56:38,158 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 03:56:38,158 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 03:56:38,158 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 03:56:38,159 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 03:56:38,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 03:56:38,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 03:56:38,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 03:56:38,161 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 03:56:38,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 03:56:38,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 03:56:38,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 03:56:38,163 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 03:56:38,164 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 03:56:38,180 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 03:56:38,181 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 03:56:38,181 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 03:56:38,181 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 03:56:38,182 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 03:56:38,182 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 03:56:38,182 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 03:56:38,183 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 03:56:38,183 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 03:56:38,183 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 03:56:38,183 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 03:56:38,183 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 03:56:38,184 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 03:56:38,184 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 03:56:38,184 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 03:56:38,184 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 03:56:38,184 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 03:56:38,185 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 03:56:38,185 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 03:56:38,185 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 03:56:38,185 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 03:56:38,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 03:56:38,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 03:56:38,186 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 03:56:38,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 03:56:38,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 03:56:38,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 03:56:38,186 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 03:56:38,187 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 03:56:38,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 03:56:38,187 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 03:56:38,187 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 03:56:38,187 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 03:56:38,188 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 03:56:38,188 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 03:56:38,188 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 787aa3251fe70c0757344936f9e5c92841f1fb61138cb758df556e9684a50783 [2023-02-18 03:56:38,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 03:56:38,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 03:56:38,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 03:56:38,410 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 03:56:38,411 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 03:56:38,412 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c [2023-02-18 03:56:39,485 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 03:56:39,650 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 03:56:39,650 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c [2023-02-18 03:56:39,656 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89826e3ef/2c0c1b98b999472db11ad023b7c85dfc/FLAGa74a0e6c4 [2023-02-18 03:56:39,667 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89826e3ef/2c0c1b98b999472db11ad023b7c85dfc [2023-02-18 03:56:39,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 03:56:39,669 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 03:56:39,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 03:56:39,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 03:56:39,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 03:56:39,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 03:56:39" (1/1) ... [2023-02-18 03:56:39,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d45dfe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:39, skipping insertion in model container [2023-02-18 03:56:39,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 03:56:39" (1/1) ... [2023-02-18 03:56:39,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 03:56:39,691 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 03:56:39,802 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_valuebound100.c[458,471] [2023-02-18 03:56:39,813 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 03:56:39,819 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 03:56:39,828 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_valuebound100.c[458,471] [2023-02-18 03:56:39,833 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 03:56:39,843 INFO L208 MainTranslator]: Completed translation [2023-02-18 03:56:39,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:39 WrapperNode [2023-02-18 03:56:39,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 03:56:39,845 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 03:56:39,845 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 03:56:39,845 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 03:56:39,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:39" (1/1) ... [2023-02-18 03:56:39,854 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:39" (1/1) ... [2023-02-18 03:56:39,864 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2023-02-18 03:56:39,864 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 03:56:39,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 03:56:39,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 03:56:39,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 03:56:39,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:39" (1/1) ... [2023-02-18 03:56:39,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:39" (1/1) ... [2023-02-18 03:56:39,871 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:39" (1/1) ... [2023-02-18 03:56:39,871 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:39" (1/1) ... [2023-02-18 03:56:39,874 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:39" (1/1) ... [2023-02-18 03:56:39,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:39" (1/1) ... [2023-02-18 03:56:39,877 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:39" (1/1) ... [2023-02-18 03:56:39,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:39" (1/1) ... [2023-02-18 03:56:39,878 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 03:56:39,879 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 03:56:39,879 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 03:56:39,879 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 03:56:39,880 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:39" (1/1) ... [2023-02-18 03:56:39,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 03:56:39,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:56:39,918 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-18 03:56:39,922 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 03:56:39,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 03:56:39,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 03:56:39,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 03:56:39,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 03:56:39,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 03:56:39,957 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 03:56:40,012 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 03:56:40,014 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 03:56:40,145 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 03:56:40,150 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 03:56:40,150 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-18 03:56:40,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 03:56:40 BoogieIcfgContainer [2023-02-18 03:56:40,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 03:56:40,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 03:56:40,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 03:56:40,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 03:56:40,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 03:56:39" (1/3) ... [2023-02-18 03:56:40,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1edd9049 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 03:56:40, skipping insertion in model container [2023-02-18 03:56:40,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:39" (2/3) ... [2023-02-18 03:56:40,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1edd9049 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 03:56:40, skipping insertion in model container [2023-02-18 03:56:40,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 03:56:40" (3/3) ... [2023-02-18 03:56:40,159 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound100.c [2023-02-18 03:56:40,173 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 03:56:40,174 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 03:56:40,210 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 03:56:40,216 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;@3d345a45, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 03:56:40,216 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 03:56:40,220 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 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 03:56:40,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-18 03:56:40,225 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:56:40,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 03:56:40,226 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:56:40,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:56:40,231 INFO L85 PathProgramCache]: Analyzing trace with hash -589436290, now seen corresponding path program 1 times [2023-02-18 03:56:40,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:56:40,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113236559] [2023-02-18 03:56:40,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:56:40,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:56:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 03:56:40,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:56:40,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113236559] [2023-02-18 03:56:40,357 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 03:56:40,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053366493] [2023-02-18 03:56:40,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:56:40,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:56:40,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:56:40,359 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 03:56:40,360 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 03:56:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 03:56:40,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 03:56:40,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:56:40,459 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 03:56:40,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 03:56:40,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053366493] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 03:56:40,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 03:56:40,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 03:56:40,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813094446] [2023-02-18 03:56:40,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 03:56:40,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 03:56:40,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:56:40,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 03:56:40,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 03:56:40,543 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 03:56:40,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:56:40,573 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2023-02-18 03:56:40,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 03:56:40,575 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 9 [2023-02-18 03:56:40,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:56:40,581 INFO L225 Difference]: With dead ends: 35 [2023-02-18 03:56:40,582 INFO L226 Difference]: Without dead ends: 15 [2023-02-18 03:56:40,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 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 03:56:40,589 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 03:56:40,590 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 03:56:40,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-18 03:56:40,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-02-18 03:56:40,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 11 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 03:56:40,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-02-18 03:56:40,612 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2023-02-18 03:56:40,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:56:40,613 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-02-18 03:56:40,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 03:56:40,613 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-02-18 03:56:40,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-18 03:56:40,614 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:56:40,614 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 03:56:40,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 03:56:40,814 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 03:56:40,815 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:56:40,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:56:40,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1187358532, now seen corresponding path program 1 times [2023-02-18 03:56:40,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:56:40,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745864706] [2023-02-18 03:56:40,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:56:40,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:56:40,827 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:56:40,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [881453710] [2023-02-18 03:56:40,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:56:40,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:56:40,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:56:40,831 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 03:56:40,870 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 03:56:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 03:56:40,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 03:56:40,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:56:40,922 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 03:56:40,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 03:56:40,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:56:40,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745864706] [2023-02-18 03:56:40,923 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:56:40,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881453710] [2023-02-18 03:56:40,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881453710] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 03:56:40,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 03:56:40,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 03:56:40,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012474126] [2023-02-18 03:56:40,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 03:56:40,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 03:56:40,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:56:40,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 03:56:40,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 03:56:40,926 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 03:56:40,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:56:40,967 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2023-02-18 03:56:40,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 03:56:40,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 9 [2023-02-18 03:56:40,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:56:40,969 INFO L225 Difference]: With dead ends: 26 [2023-02-18 03:56:40,969 INFO L226 Difference]: Without dead ends: 22 [2023-02-18 03:56:40,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 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 03:56:40,970 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 45 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 03:56:40,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 45 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 03:56:40,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-18 03:56:40,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-18 03:56:40,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 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 03:56:40,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-02-18 03:56:40,982 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 9 [2023-02-18 03:56:40,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:56:40,983 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-02-18 03:56:40,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 03:56:40,983 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-02-18 03:56:40,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 03:56:40,984 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:56:40,984 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 03:56:40,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-18 03:56:41,185 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 03:56:41,186 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:56:41,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:56:41,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1781398469, now seen corresponding path program 1 times [2023-02-18 03:56:41,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:56:41,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338689906] [2023-02-18 03:56:41,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:56:41,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:56:41,200 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:56:41,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [459052356] [2023-02-18 03:56:41,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:56:41,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:56:41,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:56:41,207 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 03:56:41,237 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 03:56:41,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 03:56:41,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 03:56:41,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:56:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 03:56:41,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:56:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 03:56:41,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:56:41,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338689906] [2023-02-18 03:56:41,659 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:56:41,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459052356] [2023-02-18 03:56:41,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459052356] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 03:56:41,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 03:56:41,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-02-18 03:56:41,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326150651] [2023-02-18 03:56:41,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 03:56:41,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 03:56:41,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:56:41,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 03:56:41,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-18 03:56:41,663 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 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 03:56:41,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:56:41,760 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2023-02-18 03:56:41,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 03:56:41,761 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 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 03:56:41,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:56:41,764 INFO L225 Difference]: With dead ends: 33 [2023-02-18 03:56:41,764 INFO L226 Difference]: Without dead ends: 27 [2023-02-18 03:56:41,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-02-18 03:56:41,768 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 03:56:41,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 39 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 03:56:41,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-18 03:56:41,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2023-02-18 03:56:41,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 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 03:56:41,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2023-02-18 03:56:41,788 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 16 [2023-02-18 03:56:41,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:56:41,788 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2023-02-18 03:56:41,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 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 03:56:41,789 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2023-02-18 03:56:41,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 03:56:41,789 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:56:41,789 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 03:56:41,800 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 03:56:41,994 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 03:56:41,995 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:56:41,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:56:41,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1711372296, now seen corresponding path program 1 times [2023-02-18 03:56:41,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:56:41,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604268031] [2023-02-18 03:56:41,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:56:41,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:56:42,012 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:56:42,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1907899780] [2023-02-18 03:56:42,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:56:42,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:56:42,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:56:42,014 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 03:56:42,028 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 03:56:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 03:56:42,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 03:56:42,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:56:46,189 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 03:56:46,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:56:50,370 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse1 (* |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|)) (.cse3 (* .cse2 .cse2))) (or (not (= (mod (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) .cse1) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (= (+ (* |ULTIMATE.start_main_~k~0#1| .cse2) (- .cse3)) 0) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|))) (not (<= (+ (div (+ (* .cse0 13) .cse1 (* 6 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) 4) (* |c_ULTIMATE.start_main_~y~0#1| 3) 1) (+ (* .cse3 .cse2) |c_ULTIMATE.start_main_~x~0#1|)))))) is different from false [2023-02-18 03:56:50,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:56:50,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604268031] [2023-02-18 03:56:50,383 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:56:50,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907899780] [2023-02-18 03:56:50,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907899780] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 03:56:50,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 03:56:50,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-02-18 03:56:50,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434660072] [2023-02-18 03:56:50,385 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 03:56:50,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 03:56:50,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:56:50,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 03:56:50,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=163, Unknown=3, NotChecked=26, Total=240 [2023-02-18 03:56:50,386 INFO L87 Difference]: Start difference. First operand 23 states and 23 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 03:56:52,405 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 03:56:55,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 03:56:57,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 03:56:59,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 03:57:02,794 WARN L539 Checker$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 03:57:04,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 03:57:06,810 WARN L539 Checker$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 03:57:06,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:57:06,815 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2023-02-18 03:57:06,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 03:57:06,815 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 03:57:06,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:57:06,816 INFO L225 Difference]: With dead ends: 31 [2023-02-18 03:57:06,816 INFO L226 Difference]: Without dead ends: 26 [2023-02-18 03:57:06,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=71, Invalid=236, Unknown=3, NotChecked=32, Total=342 [2023-02-18 03:57:06,817 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2023-02-18 03:57:06,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 52 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 5 Unknown, 0 Unchecked, 13.3s Time] [2023-02-18 03:57:06,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-18 03:57:06,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-02-18 03:57:06,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 03:57:06,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-02-18 03:57:06,826 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2023-02-18 03:57:06,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:57:06,826 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-02-18 03:57:06,826 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 03:57:06,827 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-02-18 03:57:06,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 03:57:06,827 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:57:06,827 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 03:57:06,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-18 03:57:07,028 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 03:57:07,029 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:57:07,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:57:07,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1075497887, now seen corresponding path program 2 times [2023-02-18 03:57:07,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:57:07,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291825917] [2023-02-18 03:57:07,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:57:07,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:57:07,042 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:57:07,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647956983] [2023-02-18 03:57:07,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 03:57:07,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:57:07,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:57:07,050 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 03:57:07,052 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 03:57:07,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 03:57:07,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 03:57:07,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 03:57:07,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:57:07,209 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 03:57:07,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:57:09,307 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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 (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0)))) 0) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 03:57:09,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:57:09,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291825917] [2023-02-18 03:57:09,309 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:57:09,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647956983] [2023-02-18 03:57:09,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647956983] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 03:57:09,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 03:57:09,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-02-18 03:57:09,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498846069] [2023-02-18 03:57:09,310 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 03:57:09,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 03:57:09,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:57:09,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 03:57:09,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=148, Unknown=1, NotChecked=24, Total=210 [2023-02-18 03:57:09,311 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 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 03:57:09,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:57:09,414 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2023-02-18 03:57:09,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 03:57:09,415 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 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 29 [2023-02-18 03:57:09,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:57:09,416 INFO L225 Difference]: With dead ends: 34 [2023-02-18 03:57:09,416 INFO L226 Difference]: Without dead ends: 29 [2023-02-18 03:57:09,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=56, Invalid=219, Unknown=1, NotChecked=30, Total=306 [2023-02-18 03:57:09,417 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 03:57:09,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 68 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 03:57:09,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-18 03:57:09,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-18 03:57:09,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 5 states have call successors, (5), 3 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 03:57:09,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-02-18 03:57:09,425 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2023-02-18 03:57:09,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:57:09,425 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-02-18 03:57:09,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 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 03:57:09,425 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-02-18 03:57:09,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 03:57:09,426 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:57:09,426 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 03:57:09,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-18 03:57:09,627 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 03:57:09,627 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:57:09,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:57:09,628 INFO L85 PathProgramCache]: Analyzing trace with hash 817917912, now seen corresponding path program 3 times [2023-02-18 03:57:09,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:57:09,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208593406] [2023-02-18 03:57:09,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:57:09,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:57:09,636 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:57:09,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [214654254] [2023-02-18 03:57:09,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 03:57:09,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:57:09,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:57:09,639 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 03:57:09,656 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 03:57:09,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 03:57:09,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 03:57:09,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 03:57:09,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:57:09,756 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 03:57:09,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:57:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 03:57:09,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:57:09,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208593406] [2023-02-18 03:57:09,885 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:57:09,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214654254] [2023-02-18 03:57:09,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214654254] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 03:57:09,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 03:57:09,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2023-02-18 03:57:09,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989314856] [2023-02-18 03:57:09,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 03:57:09,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 03:57:09,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:57:09,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 03:57:09,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-02-18 03:57:09,889 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 18 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 10 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 03:57:10,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:57:10,245 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2023-02-18 03:57:10,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 03:57:10,245 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 10 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 36 [2023-02-18 03:57:10,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:57:10,246 INFO L225 Difference]: With dead ends: 47 [2023-02-18 03:57:10,246 INFO L226 Difference]: Without dead ends: 41 [2023-02-18 03:57:10,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2023-02-18 03:57:10,247 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 46 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 03:57:10,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 126 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 03:57:10,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-18 03:57:10,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-02-18 03:57:10,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 9 states have call successors, (9), 3 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 03:57:10,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2023-02-18 03:57:10,262 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 36 [2023-02-18 03:57:10,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:57:10,262 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2023-02-18 03:57:10,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 10 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 03:57:10,263 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2023-02-18 03:57:10,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-18 03:57:10,264 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:57:10,264 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 03:57:10,269 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 03:57:10,469 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 03:57:10,470 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:57:10,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:57:10,470 INFO L85 PathProgramCache]: Analyzing trace with hash 385378200, now seen corresponding path program 4 times [2023-02-18 03:57:10,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:57:10,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344564830] [2023-02-18 03:57:10,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:57:10,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:57:10,486 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:57:10,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012715815] [2023-02-18 03:57:10,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 03:57:10,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:57:10,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:57:10,489 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 03:57:10,491 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 03:57:10,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 03:57:10,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 03:57:10,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-18 03:57:10,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:57:10,683 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 36 proven. 85 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-18 03:57:10,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:57:12,745 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (not (= (mod (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (- .cse0)) 0))) is different from false [2023-02-18 03:57:16,771 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_18| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32|))) (or (= (mod (+ .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| 2)) 4) 0) (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_18|) (- .cse0)) 0))))) is different from true [2023-02-18 03:57:22,794 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_18| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32|))) (or (= (mod (+ .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| 2)) 4) 0) (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_18|) (- .cse0)) 0))))) is different from true [2023-02-18 03:57:24,807 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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 (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0)))) 0) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 03:57:24,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:57:24,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344564830] [2023-02-18 03:57:24,813 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:57:24,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012715815] [2023-02-18 03:57:24,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012715815] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 03:57:24,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 03:57:24,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-18 03:57:24,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672953993] [2023-02-18 03:57:24,814 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 03:57:24,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 03:57:24,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:57:24,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 03:57:24,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=269, Unknown=4, NotChecked=140, Total=462 [2023-02-18 03:57:24,816 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 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 03:57:25,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:57:25,103 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2023-02-18 03:57:25,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 03:57:25,103 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 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 64 [2023-02-18 03:57:25,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:57:25,104 INFO L225 Difference]: With dead ends: 49 [2023-02-18 03:57:25,104 INFO L226 Difference]: Without dead ends: 44 [2023-02-18 03:57:25,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=68, Invalid=364, Unknown=4, NotChecked=164, Total=600 [2023-02-18 03:57:25,105 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 03:57:25,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 186 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 03:57:25,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-18 03:57:25,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-02-18 03:57:25,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 10 states have call successors, (10), 3 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 03:57:25,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2023-02-18 03:57:25,117 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 64 [2023-02-18 03:57:25,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:57:25,118 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2023-02-18 03:57:25,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 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 03:57:25,118 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2023-02-18 03:57:25,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 03:57:25,119 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:57:25,119 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 03:57:25,130 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 03:57:25,330 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 03:57:25,330 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:57:25,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:57:25,331 INFO L85 PathProgramCache]: Analyzing trace with hash 2073985217, now seen corresponding path program 5 times [2023-02-18 03:57:25,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:57:25,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973444555] [2023-02-18 03:57:25,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:57:25,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:57:25,353 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:57:25,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228139090] [2023-02-18 03:57:25,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 03:57:25,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:57:25,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:57:25,358 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 03:57:25,360 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 03:57:25,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-02-18 03:57:25,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 03:57:25,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-18 03:57:25,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:57:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 17 proven. 133 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-18 03:57:25,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:57:25,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:57:25,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973444555] [2023-02-18 03:57:25,753 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:57:25,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228139090] [2023-02-18 03:57:25,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228139090] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 03:57:25,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 03:57:25,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-02-18 03:57:25,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127045942] [2023-02-18 03:57:25,754 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 03:57:25,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 03:57:25,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:57:25,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 03:57:25,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2023-02-18 03:57:25,756 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 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 03:57:26,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:57:26,099 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2023-02-18 03:57:26,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 03:57:26,100 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 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 71 [2023-02-18 03:57:26,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:57:26,101 INFO L225 Difference]: With dead ends: 52 [2023-02-18 03:57:26,101 INFO L226 Difference]: Without dead ends: 47 [2023-02-18 03:57:26,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2023-02-18 03:57:26,102 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 03:57:26,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 214 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 03:57:26,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-18 03:57:26,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-02-18 03:57:26,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 11 states have call successors, (11), 3 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 03:57:26,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2023-02-18 03:57:26,131 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 71 [2023-02-18 03:57:26,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:57:26,133 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2023-02-18 03:57:26,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 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 03:57:26,135 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2023-02-18 03:57:26,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-02-18 03:57:26,138 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:57:26,139 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 03:57:26,144 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 03:57:26,340 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 03:57:26,340 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:57:26,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:57:26,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1353348984, now seen corresponding path program 6 times [2023-02-18 03:57:26,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:57:26,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601383477] [2023-02-18 03:57:26,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:57:26,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:57:26,349 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:57:26,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [990518174] [2023-02-18 03:57:26,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 03:57:26,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:57:26,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:57:26,350 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 03:57:26,358 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 03:57:26,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-02-18 03:57:26,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 03:57:26,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-18 03:57:26,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:57:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 37 proven. 145 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-18 03:57:26,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:57:26,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:57:26,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601383477] [2023-02-18 03:57:26,709 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:57:26,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990518174] [2023-02-18 03:57:26,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990518174] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 03:57:26,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 03:57:26,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-02-18 03:57:26,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431615655] [2023-02-18 03:57:26,710 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 03:57:26,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 03:57:26,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:57:26,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 03:57:26,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2023-02-18 03:57:26,711 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 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 03:57:27,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:57:27,068 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2023-02-18 03:57:27,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 03:57:27,068 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 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 78 [2023-02-18 03:57:27,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:57:27,069 INFO L225 Difference]: With dead ends: 55 [2023-02-18 03:57:27,069 INFO L226 Difference]: Without dead ends: 50 [2023-02-18 03:57:27,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 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 03:57:27,070 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 03:57:27,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 244 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 03:57:27,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-18 03:57:27,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-02-18 03:57:27,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 12 states have call successors, (12), 3 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 03:57:27,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2023-02-18 03:57:27,085 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 78 [2023-02-18 03:57:27,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:57:27,085 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2023-02-18 03:57:27,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 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 03:57:27,085 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2023-02-18 03:57:27,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-02-18 03:57:27,089 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:57:27,089 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 03:57:27,096 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 03:57:27,293 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 03:57:27,293 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:57:27,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:57:27,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1817498849, now seen corresponding path program 7 times [2023-02-18 03:57:27,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:57:27,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426734125] [2023-02-18 03:57:27,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:57:27,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:57:27,303 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:57:27,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [884476810] [2023-02-18 03:57:27,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 03:57:27,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:57:27,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:57:27,305 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 03:57:27,308 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 03:57:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 03:57:27,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-18 03:57:27,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:57:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 51 proven. 166 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-18 03:57:27,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:57:29,634 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (not (= (mod (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (- .cse0)) 0))) is different from false [2023-02-18 03:57:34,013 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_27| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68|))) (or (= (+ (- .cse0) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_27|)) 0) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| 2) .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68|)) 4) 0)))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2023-02-18 03:57:40,035 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_27| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68|))) (or (= (+ (- .cse0) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_27|)) 0) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| 2) .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68|)) 4) 0)))) (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-02-18 03:57:42,045 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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 (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0)))) 0) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 03:57:42,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:57:42,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426734125] [2023-02-18 03:57:42,050 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:57:42,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884476810] [2023-02-18 03:57:42,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884476810] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 03:57:42,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 03:57:42,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-02-18 03:57:42,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213462752] [2023-02-18 03:57:42,051 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 03:57:42,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 03:57:42,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:57:42,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 03:57:42,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=377, Unknown=4, NotChecked=164, Total=600 [2023-02-18 03:57:42,052 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 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 03:57:42,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:57:42,419 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2023-02-18 03:57:42,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 03:57:42,419 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 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 85 [2023-02-18 03:57:42,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:57:42,420 INFO L225 Difference]: With dead ends: 58 [2023-02-18 03:57:42,420 INFO L226 Difference]: Without dead ends: 53 [2023-02-18 03:57:42,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=74, Invalid=490, Unknown=4, NotChecked=188, Total=756 [2023-02-18 03:57:42,422 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 03:57:42,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 260 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 03:57:42,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-18 03:57:42,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-02-18 03:57:42,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 13 states have call successors, (13), 3 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 03:57:42,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2023-02-18 03:57:42,436 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 85 [2023-02-18 03:57:42,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:57:42,437 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2023-02-18 03:57:42,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 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 03:57:42,437 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2023-02-18 03:57:42,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-18 03:57:42,438 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:57:42,438 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 03:57:42,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 03:57:42,644 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 03:57:42,644 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:57:42,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:57:42,645 INFO L85 PathProgramCache]: Analyzing trace with hash 638795608, now seen corresponding path program 8 times [2023-02-18 03:57:42,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:57:42,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100839684] [2023-02-18 03:57:42,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:57:42,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:57:42,662 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:57:42,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189196061] [2023-02-18 03:57:42,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 03:57:42,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:57:42,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:57:42,665 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 03:57:42,667 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 03:57:42,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 03:57:42,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 03:57:42,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 85 conjunts are in the unsatisfiable core [2023-02-18 03:57:42,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:57:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 107 proven. 211 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2023-02-18 03:57:43,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:57:44,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:57:44,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100839684] [2023-02-18 03:57:44,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:57:44,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189196061] [2023-02-18 03:57:44,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189196061] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 03:57:44,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 03:57:44,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-02-18 03:57:44,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567034301] [2023-02-18 03:57:44,284 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 03:57:44,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 03:57:44,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:57:44,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 03:57:44,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2023-02-18 03:57:44,285 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 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 03:57:44,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:57:44,809 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2023-02-18 03:57:44,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 03:57:44,809 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 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 92 [2023-02-18 03:57:44,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:57:44,810 INFO L225 Difference]: With dead ends: 65 [2023-02-18 03:57:44,810 INFO L226 Difference]: Without dead ends: 60 [2023-02-18 03:57:44,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2023-02-18 03:57:44,811 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 11 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 03:57:44,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 342 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 03:57:44,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-18 03:57:44,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-02-18 03:57:44,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-18 03:57:44,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2023-02-18 03:57:44,826 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 92 [2023-02-18 03:57:44,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:57:44,826 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2023-02-18 03:57:44,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 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 03:57:44,827 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2023-02-18 03:57:44,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-02-18 03:57:44,827 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:57:44,827 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 03:57:44,833 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 03:57:45,028 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 03:57:45,028 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:57:45,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:57:45,028 INFO L85 PathProgramCache]: Analyzing trace with hash 550859009, now seen corresponding path program 9 times [2023-02-18 03:57:45,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:57:45,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118736446] [2023-02-18 03:57:45,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:57:45,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:57:45,035 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:57:45,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [576847326] [2023-02-18 03:57:45,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 03:57:45,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:57:45,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:57:45,037 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 03:57:45,040 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 03:57:45,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-02-18 03:57:45,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 03:57:45,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-18 03:57:45,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:57:45,438 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 43 proven. 253 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-18 03:57:45,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:57:45,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:57:45,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118736446] [2023-02-18 03:57:45,536 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:57:45,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576847326] [2023-02-18 03:57:45,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576847326] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 03:57:45,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 03:57:45,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-18 03:57:45,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218286529] [2023-02-18 03:57:45,537 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 03:57:45,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 03:57:45,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:57:45,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 03:57:45,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2023-02-18 03:57:45,539 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 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 03:57:45,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:57:45,982 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2023-02-18 03:57:45,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 03:57:45,985 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 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 99 [2023-02-18 03:57:45,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:57:45,986 INFO L225 Difference]: With dead ends: 68 [2023-02-18 03:57:45,986 INFO L226 Difference]: Without dead ends: 63 [2023-02-18 03:57:45,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 88 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 03:57:45,987 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 7 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 03:57:45,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 328 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 03:57:45,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-02-18 03:57:46,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-02-18 03:57:46,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 15 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-18 03:57:46,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2023-02-18 03:57:46,005 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 99 [2023-02-18 03:57:46,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:57:46,006 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2023-02-18 03:57:46,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 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 03:57:46,006 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2023-02-18 03:57:46,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-02-18 03:57:46,007 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:57:46,007 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 03:57:46,014 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 03:57:46,214 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 03:57:46,215 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:57:46,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:57:46,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1794064584, now seen corresponding path program 10 times [2023-02-18 03:57:46,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:57:46,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375547639] [2023-02-18 03:57:46,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:57:46,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:57:46,225 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:57:46,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [143553768] [2023-02-18 03:57:46,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 03:57:46,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:57:46,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:57:46,233 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 03:57:46,255 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 03:57:46,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 03:57:46,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 03:57:46,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-18 03:57:46,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:57:48,562 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (+ 10 1) 1))) (and (= (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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_~y~0#1| (+ 12 1)) (< .cse0 |c_ULTIMATE.start_main_~k~0#1|) (<= |c_ULTIMATE.start_main_~c~0#1| (+ .cse0 1)))) is different from true [2023-02-18 03:57:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 66 proven. 261 refuted. 0 times theorem prover too weak. 325 trivial. 13 not checked. [2023-02-18 03:57:50,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:57:52,681 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (not (= (mod (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (- .cse0)) 0))) is different from false [2023-02-18 03:57:56,699 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_113| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_36| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113|))) (or (= (mod (+ .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113|)) 4) 0) (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_36|) (- .cse0)) 0))))) is different from true [2023-02-18 03:58:02,721 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_113| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_36| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113|))) (or (= (mod (+ .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113|)) 4) 0) (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_36|) (- .cse0)) 0)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-02-18 03:58:04,729 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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 (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0)))) 0) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 03:58:04,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:58:04,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375547639] [2023-02-18 03:58:04,734 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:58:04,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143553768] [2023-02-18 03:58:04,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143553768] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 03:58:04,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 03:58:04,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-02-18 03:58:04,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708441089] [2023-02-18 03:58:04,734 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 03:58:04,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 03:58:04,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:58:04,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 03:58:04,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=503, Unknown=6, NotChecked=240, Total=812 [2023-02-18 03:58:04,736 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 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 03:58:07,001 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 03:58:08,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 03:58:10,770 WARN L539 Checker$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 03:58:10,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:58:10,798 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2023-02-18 03:58:10,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 03:58:10,798 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 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 106 [2023-02-18 03:58:10,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:58:10,799 INFO L225 Difference]: With dead ends: 71 [2023-02-18 03:58:10,799 INFO L226 Difference]: Without dead ends: 66 [2023-02-18 03:58:10,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=76, Invalid=588, Unknown=6, NotChecked=260, Total=930 [2023-02-18 03:58:10,800 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 5 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-02-18 03:58:10,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 383 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 902 Invalid, 2 Unknown, 68 Unchecked, 6.0s Time] [2023-02-18 03:58:10,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-02-18 03:58:10,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-02-18 03:58:10,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 16 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-18 03:58:10,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2023-02-18 03:58:10,819 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 106 [2023-02-18 03:58:10,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:58:10,819 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2023-02-18 03:58:10,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 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 03:58:10,819 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2023-02-18 03:58:10,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-02-18 03:58:10,820 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:58:10,820 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 03:58:10,831 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 03:58:11,027 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 03:58:11,027 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:58:11,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:58:11,027 INFO L85 PathProgramCache]: Analyzing trace with hash -444443359, now seen corresponding path program 11 times [2023-02-18 03:58:11,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:58:11,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851668481] [2023-02-18 03:58:11,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:58:11,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:58:11,034 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:58:11,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420388457] [2023-02-18 03:58:11,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 03:58:11,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:58:11,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:58:11,036 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 03:58:11,039 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 03:58:11,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2023-02-18 03:58:11,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 03:58:11,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-18 03:58:11,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:58:11,950 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 29 proven. 358 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-02-18 03:58:11,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:58:12,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:58:12,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851668481] [2023-02-18 03:58:12,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:58:12,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420388457] [2023-02-18 03:58:12,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420388457] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 03:58:12,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 03:58:12,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-02-18 03:58:12,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420785167] [2023-02-18 03:58:12,114 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 03:58:12,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 03:58:12,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:58:12,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 03:58:12,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2023-02-18 03:58:12,116 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 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 03:58:12,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:58:12,730 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2023-02-18 03:58:12,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 03:58:12,731 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 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 113 [2023-02-18 03:58:12,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:58:12,732 INFO L225 Difference]: With dead ends: 74 [2023-02-18 03:58:12,732 INFO L226 Difference]: Without dead ends: 69 [2023-02-18 03:58:12,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2023-02-18 03:58:12,733 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 03:58:12,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 404 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 03:58:12,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-18 03:58:12,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-02-18 03:58:12,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-18 03:58:12,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2023-02-18 03:58:12,751 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 113 [2023-02-18 03:58:12,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:58:12,751 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2023-02-18 03:58:12,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 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 03:58:12,751 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2023-02-18 03:58:12,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-18 03:58:12,753 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:58:12,753 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 03:58:12,761 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 03:58:12,960 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 03:58:12,960 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:58:12,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:58:12,961 INFO L85 PathProgramCache]: Analyzing trace with hash -16713960, now seen corresponding path program 12 times [2023-02-18 03:58:12,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:58:12,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438483465] [2023-02-18 03:58:12,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:58:12,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:58:12,973 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:58:12,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796230268] [2023-02-18 03:58:12,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 03:58:12,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:58:12,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:58:12,975 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 03:58:12,977 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 03:58:13,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2023-02-18 03:58:13,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 03:58:13,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 77 conjunts are in the unsatisfiable core [2023-02-18 03:58:13,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:58:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 46 proven. 391 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-02-18 03:58:13,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:58:14,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 03:58:14,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438483465] [2023-02-18 03:58:14,000 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 03:58:14,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796230268] [2023-02-18 03:58:14,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796230268] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 03:58:14,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 03:58:14,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-02-18 03:58:14,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639456394] [2023-02-18 03:58:14,001 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 03:58:14,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 03:58:14,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 03:58:14,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 03:58:14,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 03:58:14,004 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 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 03:58:14,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 03:58:14,691 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2023-02-18 03:58:14,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 03:58:14,691 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 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 120 [2023-02-18 03:58:14,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 03:58:14,692 INFO L225 Difference]: With dead ends: 77 [2023-02-18 03:58:14,692 INFO L226 Difference]: Without dead ends: 72 [2023-02-18 03:58:14,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 03:58:14,693 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 03:58:14,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 445 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 03:58:14,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-02-18 03:58:14,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-02-18 03:58:14,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-02-18 03:58:14,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2023-02-18 03:58:14,712 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 120 [2023-02-18 03:58:14,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 03:58:14,713 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2023-02-18 03:58:14,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 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 03:58:14,713 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2023-02-18 03:58:14,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-02-18 03:58:14,714 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 03:58:14,714 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 03:58:14,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-18 03:58:14,921 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 03:58:14,921 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 03:58:14,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 03:58:14,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1287814847, now seen corresponding path program 13 times [2023-02-18 03:58:14,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 03:58:14,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597825894] [2023-02-18 03:58:14,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 03:58:14,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 03:58:14,929 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 03:58:14,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1266018612] [2023-02-18 03:58:14,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 03:58:14,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 03:58:14,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 03:58:14,930 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 03:58:14,931 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 03:58:15,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 03:58:15,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 81 conjunts are in the unsatisfiable core [2023-02-18 03:58:15,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 03:58:15,402 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 81 proven. 409 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2023-02-18 03:58:15,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 03:58:17,475 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (not (= (mod (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (- .cse0)) 0))) is different from false [2023-02-18 03:58:21,491 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_74| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174|))) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| 2) .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174|)) 4) 0) (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_74|) (- .cse0)) 0))))) is different from true [2023-02-18 03:58:27,509 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_74| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174|))) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| 2) .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174|)) 4) 0) (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_74|) (- .cse0)) 0)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-02-18 03:58:29,515 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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)) (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (+ (- (* .cse0 .cse0)) (* |c_ULTIMATE.start_main_~k~0#1| .cse0))) 0) (not (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |c_ULTIMATE.start_main_~k~0#1|)) is different from false [2023-02-18 03:58:31,527 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~c~0#1| 1))) (or (not (= (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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)) (= (let ((.cse0 (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)))) (+ (* .cse0 |c_ULTIMATE.start_main_~k~0#1|) (- (* .cse0 .cse0)))) 0) (< (+ 1 .cse1) |c_ULTIMATE.start_main_~k~0#1|) (not (< .cse1 |c_ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 03:58:33,542 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)))) (or (= (let ((.cse0 (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1))) (+ (* .cse0 |c_ULTIMATE.start_main_~k~0#1|) (- (* .cse0 .cse0)))) 0) (not (= (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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)) (not (< .cse1 |c_ULTIMATE.start_main_~k~0#1|)) (< (+ .cse1 1) |c_ULTIMATE.start_main_~k~0#1|))) is different from false [2023-02-18 03:58:35,564 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1))) (or (not (= (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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)) (= (let ((.cse0 (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1))) (+ (* .cse0 |c_ULTIMATE.start_main_~k~0#1|) (- (* .cse0 .cse0)))) 0) (< (+ 1 .cse1) |c_ULTIMATE.start_main_~k~0#1|) (not (< .cse1 |c_ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 03:58:37,576 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)))) (or (not (= (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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)) (< (+ .cse0 1) |c_ULTIMATE.start_main_~k~0#1|) (not (< .cse0 |c_ULTIMATE.start_main_~k~0#1|)) (= (let ((.cse1 (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1))) (+ (* .cse1 |c_ULTIMATE.start_main_~k~0#1|) (- (* .cse1 .cse1)))) 0))) is different from false [2023-02-18 03:59:16,750 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (+ (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1) 1) 1))) (or (not (= (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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)) (not (< .cse0 |c_ULTIMATE.start_main_~k~0#1|)) (< (+ .cse0 1) |c_ULTIMATE.start_main_~k~0#1|) (= (let ((.cse1 (+ (+ 1 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1)) 1))) (+ (* .cse1 |c_ULTIMATE.start_main_~k~0#1|) (- (* .cse1 .cse1)))) 0))) is different from false [2023-02-18 04:00:02,980 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (+ (+ (+ (+ (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1) 1) 1) 1) 1) 1))) (or (not (= (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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)) (not (< .cse0 |c_ULTIMATE.start_main_~k~0#1|)) (= (let ((.cse1 (+ (+ (+ (+ (+ 1 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1)) 1) 1) 1) 1))) (+ (* .cse1 |c_ULTIMATE.start_main_~k~0#1|) (- (* .cse1 .cse1)))) 0) (< (+ .cse0 1) |c_ULTIMATE.start_main_~k~0#1|))) is different from false [2023-02-18 04:00:04,995 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (+ (+ (+ (+ (+ (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1) 1) 1) 1) 1) 1) 1))) (or (not (= (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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)) (not (< .cse0 |c_ULTIMATE.start_main_~k~0#1|)) (< (+ .cse0 1) |c_ULTIMATE.start_main_~k~0#1|) (= (let ((.cse1 (+ (+ (+ (+ (+ (+ 1 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1)) 1) 1) 1) 1) 1))) (+ (* .cse1 |c_ULTIMATE.start_main_~k~0#1|) (- (* .cse1 .cse1)))) 0))) is different from false [2023-02-18 04:00:51,993 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1) 1) 1) 1) 1) 1) 1) 1) 1) 1) 1))) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (not (< .cse0 |ULTIMATE.start_main_~k~0#1|)) (= (let ((.cse1 (+ 1 (+ (+ (+ (+ (+ (+ (+ (+ (+ 1 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1)) 1) 1) 1) 1) 1) 1) 1) 1)))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse1) (- (* .cse1 .cse1)))) 0) (< (+ .cse0 1) |ULTIMATE.start_main_~k~0#1|))))) is different from false [2023-02-18 04:00:51,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:00:51,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597825894] [2023-02-18 04:00:51,998 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:00:51,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266018612] [2023-02-18 04:00:51,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266018612] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:00:51,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:00:51,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-02-18 04:00:51,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147442558] [2023-02-18 04:00:51,998 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 04:00:51,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 04:00:51,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:00:51,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 04:00:51,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=933, Unknown=27, NotChecked=900, Total=2070 [2023-02-18 04:00:51,999 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 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 04:00:52,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:00:52,731 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2023-02-18 04:00:52,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 04:00:52,731 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 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 127 [2023-02-18 04:00:52,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:00:52,732 INFO L225 Difference]: With dead ends: 80 [2023-02-18 04:00:52,732 INFO L226 Difference]: Without dead ends: 75 [2023-02-18 04:00:52,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 12 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 150.7s TimeCoverageRelationStatistics Valid=229, Invalid=1124, Unknown=27, NotChecked=972, Total=2352 [2023-02-18 04:00:52,733 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 04:00:52,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 488 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1235 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 04:00:52,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-18 04:00:52,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-02-18 04:00:52,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 19 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-02-18 04:00:52,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2023-02-18 04:00:52,754 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 127 [2023-02-18 04:00:52,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:00:52,754 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2023-02-18 04:00:52,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 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 04:00:52,755 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2023-02-18 04:00:52,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-02-18 04:00:52,756 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:00:52,756 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:00:52,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-18 04:00:52,957 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 04:00:52,957 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:00:52,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:00:52,958 INFO L85 PathProgramCache]: Analyzing trace with hash 146925304, now seen corresponding path program 14 times [2023-02-18 04:00:52,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:00:52,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964274713] [2023-02-18 04:00:52,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:00:52,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:00:52,967 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:00:52,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335604340] [2023-02-18 04:00:52,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 04:00:52,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:00:52,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:00:52,969 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 04:00:52,971 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 04:00:53,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 04:00:53,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:00:53,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 84 conjunts are in the unsatisfiable core [2023-02-18 04:00:53,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:00:53,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 83 proven. 463 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2023-02-18 04:00:53,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:00:55,483 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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 (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0)))) 0) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 04:00:55,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:00:55,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964274713] [2023-02-18 04:00:55,484 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:00:55,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335604340] [2023-02-18 04:00:55,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335604340] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:00:55,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:00:55,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-02-18 04:00:55,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375027493] [2023-02-18 04:00:55,485 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 04:00:55,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-18 04:00:55,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:00:55,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-18 04:00:55,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=733, Unknown=1, NotChecked=54, Total=870 [2023-02-18 04:00:55,486 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 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 04:00:56,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:00:56,194 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2023-02-18 04:00:56,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-18 04:00:56,194 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 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 134 [2023-02-18 04:00:56,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:00:56,195 INFO L225 Difference]: With dead ends: 83 [2023-02-18 04:00:56,195 INFO L226 Difference]: Without dead ends: 78 [2023-02-18 04:00:56,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=101, Invalid=894, Unknown=1, NotChecked=60, Total=1056 [2023-02-18 04:00:56,196 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 7 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 1360 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 04:00:56,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 533 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1360 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 04:00:56,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-18 04:00:56,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2023-02-18 04:00:56,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 20 states have call successors, (20), 4 states have call predecessors, (20), 3 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-18 04:00:56,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2023-02-18 04:00:56,216 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 134 [2023-02-18 04:00:56,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:00:56,217 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2023-02-18 04:00:56,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 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 04:00:56,217 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2023-02-18 04:00:56,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-02-18 04:00:56,218 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:00:56,218 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:00:56,224 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 04:00:56,424 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 04:00:56,425 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:00:56,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:00:56,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1332278625, now seen corresponding path program 15 times [2023-02-18 04:00:56,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:00:56,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724313637] [2023-02-18 04:00:56,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:00:56,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:00:56,432 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:00:56,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [209997205] [2023-02-18 04:00:56,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 04:00:56,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:00:56,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:00:56,434 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 04:00:56,437 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 04:00:56,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2023-02-18 04:00:56,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:00:56,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 88 conjunts are in the unsatisfiable core [2023-02-18 04:00:56,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:00:59,025 WARN L859 $PredicateComparison]: unable to prove that (and (= (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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_~y~0#1| (+ (+ (+ (+ (+ (+ 3 1) 1) 1) 1) 1) 1)) (= (+ (+ 0 1) 1) (+ (- 1) (+ (- 1) (+ (- 1) (+ (- 1) (+ (- 1) (+ (- 1) (+ |c_ULTIMATE.start_main_~c~0#1| (- 1)))))))))) is different from true [2023-02-18 04:01:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 64 proven. 523 refuted. 0 times theorem prover too weak. 630 trivial. 18 not checked. [2023-02-18 04:01:03,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:01:07,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:01:07,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724313637] [2023-02-18 04:01:07,329 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:01:07,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209997205] [2023-02-18 04:01:07,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209997205] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:01:07,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:01:07,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-02-18 04:01:07,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838095959] [2023-02-18 04:01:07,330 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 04:01:07,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 04:01:07,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:01:07,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 04:01:07,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=784, Unknown=5, NotChecked=56, Total=930 [2023-02-18 04:01:07,331 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 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 04:01:09,531 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 04:01:11,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 04:01:13,735 WARN L539 Checker$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 04:01:15,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 04:01:17,843 WARN L539 Checker$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 04:01:19,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 04:01:21,924 WARN L539 Checker$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 04:01:23,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 04:01:26,028 WARN L539 Checker$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 04:01:26,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:01:26,037 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2023-02-18 04:01:26,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-18 04:01:26,037 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 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 141 [2023-02-18 04:01:26,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:01:26,038 INFO L225 Difference]: With dead ends: 86 [2023-02-18 04:01:26,038 INFO L226 Difference]: Without dead ends: 81 [2023-02-18 04:01:26,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=104, Invalid=951, Unknown=5, NotChecked=62, Total=1122 [2023-02-18 04:01:26,039 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 0 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 18.6s IncrementalHoareTripleChecker+Time [2023-02-18 04:01:26,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 604 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1521 Invalid, 8 Unknown, 90 Unchecked, 18.6s Time] [2023-02-18 04:01:26,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-18 04:01:26,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-02-18 04:01:26,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 21 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-18 04:01:26,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2023-02-18 04:01:26,062 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 141 [2023-02-18 04:01:26,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:01:26,063 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2023-02-18 04:01:26,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 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 04:01:26,063 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2023-02-18 04:01:26,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-02-18 04:01:26,065 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:01:26,065 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:01:26,072 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 04:01:26,272 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 04:01:26,273 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:01:26,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:01:26,273 INFO L85 PathProgramCache]: Analyzing trace with hash 2058456792, now seen corresponding path program 16 times [2023-02-18 04:01:26,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:01:26,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107939410] [2023-02-18 04:01:26,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:01:26,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:01:26,282 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:01:26,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1394499098] [2023-02-18 04:01:26,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 04:01:26,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:01:26,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:01:26,284 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 04:01:26,287 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 04:01:26,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 04:01:26,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:01:26,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 92 conjunts are in the unsatisfiable core [2023-02-18 04:01:26,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:01:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 96 proven. 571 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2023-02-18 04:01:26,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:01:28,898 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (not (= (mod (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (- .cse0)) 0))) is different from false [2023-02-18 04:01:32,922 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_98| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252|))) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252|) .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| 2)) 4) 0) (= (+ (- .cse0) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_98|)) 0))))) is different from true [2023-02-18 04:01:38,942 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_98| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252|))) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252|) .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| 2)) 4) 0) (= (+ (- .cse0) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_98|)) 0)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-02-18 04:01:40,947 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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 (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0)))) 0) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 04:01:40,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:01:40,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107939410] [2023-02-18 04:01:40,950 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:01:40,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394499098] [2023-02-18 04:01:40,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394499098] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:01:40,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:01:40,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-02-18 04:01:40,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685727224] [2023-02-18 04:01:40,951 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 04:01:40,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 04:01:40,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:01:40,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 04:01:40,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=809, Unknown=4, NotChecked=236, Total=1122 [2023-02-18 04:01:40,953 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 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 04:01:41,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:01:41,886 INFO L93 Difference]: Finished difference Result 89 states and 107 transitions. [2023-02-18 04:01:41,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-18 04:01:41,887 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 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 148 [2023-02-18 04:01:41,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:01:41,888 INFO L225 Difference]: With dead ends: 89 [2023-02-18 04:01:41,888 INFO L226 Difference]: Without dead ends: 84 [2023-02-18 04:01:41,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 127 SyntacticMatches, 1 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 04:01:41,889 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-18 04:01:41,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 654 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1693 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-18 04:01:41,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-02-18 04:01:41,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-02-18 04:01:41,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 22 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-18 04:01:41,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2023-02-18 04:01:41,913 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 148 [2023-02-18 04:01:41,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:01:41,913 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2023-02-18 04:01:41,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 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 04:01:41,914 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2023-02-18 04:01:41,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-02-18 04:01:41,915 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:01:41,915 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:01:41,927 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 04:01:42,122 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 04:01:42,122 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:01:42,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:01:42,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1810280833, now seen corresponding path program 17 times [2023-02-18 04:01:42,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:01:42,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375305438] [2023-02-18 04:01:42,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:01:42,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:01:42,134 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:01:42,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772406249] [2023-02-18 04:01:42,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 04:01:42,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:01:42,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:01:42,136 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 04:01:42,141 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 04:04:01,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2023-02-18 04:04:01,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:04:01,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 96 conjunts are in the unsatisfiable core [2023-02-18 04:04:01,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:04:02,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 86 proven. 646 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2023-02-18 04:04:02,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:04:02,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:04:02,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375305438] [2023-02-18 04:04:02,329 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:04:02,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772406249] [2023-02-18 04:04:02,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772406249] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:04:02,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:04:02,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2023-02-18 04:04:02,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269543567] [2023-02-18 04:04:02,330 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 04:04:02,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-18 04:04:02,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:04:02,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-18 04:04:02,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2023-02-18 04:04:02,332 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-18 04:04:03,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:04:03,236 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2023-02-18 04:04:03,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-18 04:04:03,236 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 155 [2023-02-18 04:04:03,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:04:03,237 INFO L225 Difference]: With dead ends: 92 [2023-02-18 04:04:03,237 INFO L226 Difference]: Without dead ends: 87 [2023-02-18 04:04:03,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2023-02-18 04:04:03,238 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 7 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 1771 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 1771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 04:04:03,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 680 Invalid, 1771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1771 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 04:04:03,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-02-18 04:04:03,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2023-02-18 04:04:03,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 23 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-18 04:04:03,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2023-02-18 04:04:03,261 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 155 [2023-02-18 04:04:03,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:04:03,262 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2023-02-18 04:04:03,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-18 04:04:03,262 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2023-02-18 04:04:03,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-02-18 04:04:03,263 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:04:03,263 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:04:03,273 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 04:04:03,473 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 04:04:03,473 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:04:03,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:04:03,473 INFO L85 PathProgramCache]: Analyzing trace with hash 548269752, now seen corresponding path program 18 times [2023-02-18 04:04:03,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:04:03,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847407759] [2023-02-18 04:04:03,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:04:03,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:04:03,481 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:04:03,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259844766] [2023-02-18 04:04:03,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 04:04:03,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:04:03,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:04:03,484 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 04:04:03,486 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 04:04:04,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2023-02-18 04:04:04,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:04:04,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 100 conjunts are in the unsatisfiable core [2023-02-18 04:04:04,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:04:04,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 97 proven. 703 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2023-02-18 04:04:04,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:04:04,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:04:04,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847407759] [2023-02-18 04:04:04,991 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:04:04,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259844766] [2023-02-18 04:04:04,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259844766] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:04:04,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:04:04,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2023-02-18 04:04:04,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155764132] [2023-02-18 04:04:04,992 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 04:04:04,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 04:04:04,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:04:04,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 04:04:04,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 04:04:04,994 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-18 04:04:05,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:04:05,998 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2023-02-18 04:04:05,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-18 04:04:05,998 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 162 [2023-02-18 04:04:05,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:04:05,999 INFO L225 Difference]: With dead ends: 95 [2023-02-18 04:04:05,999 INFO L226 Difference]: Without dead ends: 90 [2023-02-18 04:04:06,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 04:04:06,000 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 7 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 1920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-18 04:04:06,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 733 Invalid, 1920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1920 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-18 04:04:06,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-02-18 04:04:06,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2023-02-18 04:04:06,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 24 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-02-18 04:04:06,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 110 transitions. [2023-02-18 04:04:06,025 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 110 transitions. Word has length 162 [2023-02-18 04:04:06,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:04:06,026 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 110 transitions. [2023-02-18 04:04:06,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-18 04:04:06,026 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 110 transitions. [2023-02-18 04:04:06,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-02-18 04:04:06,028 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:04:06,028 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:04:06,038 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 04:04:06,238 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 04:04:06,238 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:04:06,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:04:06,239 INFO L85 PathProgramCache]: Analyzing trace with hash -954681951, now seen corresponding path program 19 times [2023-02-18 04:04:06,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:04:06,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718598118] [2023-02-18 04:04:06,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:04:06,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:04:06,254 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:04:06,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [619967422] [2023-02-18 04:04:06,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 04:04:06,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:04:06,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:04:06,256 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 04:04:06,259 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 04:04:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:04:06,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 104 conjunts are in the unsatisfiable core [2023-02-18 04:04:06,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:04:07,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 111 proven. 760 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-02-18 04:04:07,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:04:09,225 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (not (= (mod (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (- .cse0)) 0))) is different from false [2023-02-18 04:04:13,243 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_324| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_107| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_324| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_324|))) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_324| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_324| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_324| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_324|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_324| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_324| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_324| 2) .cse0) 4) 0) (= (+ (- .cse0) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_324| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_107|)) 0))))) is different from true [2023-02-18 04:04:19,256 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_324| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_107| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_324| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_324|))) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_324| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_324| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_324| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_324|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_324| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_324| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_324| 2) .cse0) 4) 0) (= (+ (- .cse0) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_324| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_107|)) 0)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-02-18 04:04:21,261 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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 (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (- (* .cse0 .cse0)))) 0) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 04:04:21,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:04:21,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718598118] [2023-02-18 04:04:21,265 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:04:21,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619967422] [2023-02-18 04:04:21,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619967422] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:04:21,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:04:21,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2023-02-18 04:04:21,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330780919] [2023-02-18 04:04:21,265 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 04:04:21,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-18 04:04:21,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:04:21,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-18 04:04:21,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=989, Unknown=4, NotChecked=260, Total=1332 [2023-02-18 04:04:21,267 INFO L87 Difference]: Start difference. First operand 90 states and 110 transitions. Second operand has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 24 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-02-18 04:04:22,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:04:22,378 INFO L93 Difference]: Finished difference Result 98 states and 119 transitions. [2023-02-18 04:04:22,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-18 04:04:22,379 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 24 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 169 [2023-02-18 04:04:22,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:04:22,381 INFO L225 Difference]: With dead ends: 98 [2023-02-18 04:04:22,381 INFO L226 Difference]: Without dead ends: 93 [2023-02-18 04:04:22,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=98, Invalid=1174, Unknown=4, NotChecked=284, Total=1560 [2023-02-18 04:04:22,382 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 7 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 2075 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 2075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-18 04:04:22,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 788 Invalid, 2075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2075 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-18 04:04:22,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-02-18 04:04:22,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-02-18 04:04:22,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 25 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-02-18 04:04:22,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2023-02-18 04:04:22,405 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 169 [2023-02-18 04:04:22,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:04:22,406 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2023-02-18 04:04:22,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 24 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-02-18 04:04:22,406 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2023-02-18 04:04:22,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-02-18 04:04:22,407 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:04:22,407 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:04:22,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-18 04:04:22,613 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 04:04:22,613 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:04:22,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:04:22,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1441462632, now seen corresponding path program 20 times [2023-02-18 04:04:22,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:04:22,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366048730] [2023-02-18 04:04:22,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:04:22,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:04:22,624 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:04:22,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [819264331] [2023-02-18 04:04:22,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 04:04:22,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:04:22,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:04:22,626 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 04:04:22,633 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 04:04:23,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 04:04:23,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:04:23,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 109 conjunts are in the unsatisfiable core [2023-02-18 04:04:23,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:04:23,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 113 proven. 832 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2023-02-18 04:04:23,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:04:26,002 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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)) (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (+ (- (* .cse0 .cse0)) (* |c_ULTIMATE.start_main_~k~0#1| .cse0))) 0) (not (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |c_ULTIMATE.start_main_~k~0#1|)) is different from false [2023-02-18 04:04:30,033 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_133| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_351| Int)) (or (= (let ((.cse0 (+ |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_351| 1))) (+ (- (* .cse0 .cse0)) (* .cse0 |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_133|))) 0) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_351| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_351| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_351| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_351|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_351| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_351|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_351| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_351| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_351| 2)) 4) 0)))) is different from true [2023-02-18 04:04:36,045 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_133| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_351| Int)) (or (= (let ((.cse0 (+ |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_351| 1))) (+ (- (* .cse0 .cse0)) (* .cse0 |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_133|))) 0) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_351| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_351| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_351| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_351|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_351| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_351|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_351| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_351| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_351| 2)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-02-18 04:04:38,049 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~c~0#1| 1))) (or (not (= (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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)) (= (let ((.cse0 (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)))) (+ (* .cse0 |c_ULTIMATE.start_main_~k~0#1|) (- (* .cse0 .cse0)))) 0) (< (+ 1 .cse1) |c_ULTIMATE.start_main_~k~0#1|) (not (< .cse1 |c_ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 04:06:42,477 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1))) (or (not (= (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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)) (= (let ((.cse0 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1))) (+ (- (* .cse0 .cse0)) (* |c_ULTIMATE.start_main_~k~0#1| .cse0))) 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 04:08:01,432 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (+ (+ (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1) 1) 1) 1))) (or (not (= (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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)) (= (let ((.cse0 (+ (+ (+ 1 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1)) 1) 1))) (+ (- (* .cse0 .cse0)) (* .cse0 |c_ULTIMATE.start_main_~k~0#1|))) 0) (not (< .cse1 |c_ULTIMATE.start_main_~k~0#1|)) (< (+ .cse1 1) |c_ULTIMATE.start_main_~k~0#1|))) is different from false [2023-02-18 04:08:03,445 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (+ (+ (+ (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1) 1) 1) 1) 1))) (or (not (= (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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)) (= (let ((.cse0 (+ (+ (+ (+ 1 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1)) 1) 1) 1))) (+ (* .cse0 |c_ULTIMATE.start_main_~k~0#1|) (- (* .cse0 .cse0)))) 0) (not (< .cse1 |c_ULTIMATE.start_main_~k~0#1|)) (< (+ .cse1 1) |c_ULTIMATE.start_main_~k~0#1|))) is different from false [2023-02-18 04:08:05,457 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (+ (+ (+ (+ (+ (+ 1 (+ (+ 1 (+ |c_ULTIMATE.start_main_~c~0#1| 1)) 1)) 1) 1) 1) 1) 1) 1))) (or (not (= (mod (+ (* |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| |c_ULTIMATE.start_main_~y~0#1| 2) (* |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)) (not (< .cse0 |c_ULTIMATE.start_main_~k~0#1|)) (= (let ((.cse1 (+ (+ (+ (+ (+ 1 (+ (+ (+ (+ (+ 1 (+ |c_ULTIMATE.start_main_~y~0#1| 1)) 1) 1) 1) 1)) 1) 1) 1) 1))) (+ (* .cse1 |c_ULTIMATE.start_main_~k~0#1|) (- (* .cse1 .cse1)))) 0) (< (+ .cse0 1) |c_ULTIMATE.start_main_~k~0#1|))) is different from false