./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound50.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 0bcbcb4a55258889434b8bf703da9ec6fb29d07a2fbacad968a5ab15e005b314 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 06:54:12,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 06:54:12,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 06:54:12,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 06:54:12,109 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 06:54:12,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 06:54:12,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 06:54:12,113 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 06:54:12,114 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 06:54:12,115 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 06:54:12,116 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 06:54:12,117 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 06:54:12,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 06:54:12,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 06:54:12,119 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 06:54:12,120 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 06:54:12,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 06:54:12,122 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 06:54:12,123 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 06:54:12,125 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 06:54:12,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 06:54:12,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 06:54:12,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 06:54:12,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 06:54:12,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 06:54:12,142 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 06:54:12,142 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 06:54:12,143 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 06:54:12,144 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 06:54:12,146 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 06:54:12,147 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 06:54:12,148 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 06:54:12,149 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 06:54:12,150 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 06:54:12,151 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 06:54:12,151 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 06:54:12,151 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 06:54:12,152 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 06:54:12,152 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 06:54:12,153 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 06:54:12,154 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 06:54:12,155 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 06:54:12,183 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 06:54:12,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 06:54:12,187 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 06:54:12,187 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 06:54:12,188 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 06:54:12,188 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 06:54:12,189 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 06:54:12,189 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 06:54:12,189 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 06:54:12,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 06:54:12,190 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 06:54:12,190 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 06:54:12,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 06:54:12,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 06:54:12,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 06:54:12,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 06:54:12,191 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 06:54:12,192 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 06:54:12,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 06:54:12,192 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 06:54:12,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 06:54:12,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 06:54:12,193 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 06:54:12,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 06:54:12,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 06:54:12,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 06:54:12,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 06:54:12,194 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 06:54:12,194 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 06:54:12,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 06:54:12,194 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 06:54:12,194 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 06:54:12,195 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 06:54:12,195 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 06:54:12,195 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 06:54:12,195 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bcbcb4a55258889434b8bf703da9ec6fb29d07a2fbacad968a5ab15e005b314 [2023-02-17 06:54:12,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 06:54:12,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 06:54:12,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 06:54:12,429 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 06:54:12,430 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 06:54:12,431 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound50.c [2023-02-17 06:54:13,594 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 06:54:13,782 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 06:54:13,783 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound50.c [2023-02-17 06:54:13,789 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c0608e9d/c31a3605bd394da0b834d9eebcb6bee9/FLAG45ed1791b [2023-02-17 06:54:13,807 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c0608e9d/c31a3605bd394da0b834d9eebcb6bee9 [2023-02-17 06:54:13,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 06:54:13,811 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 06:54:13,816 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 06:54:13,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 06:54:13,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 06:54:13,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 06:54:13" (1/1) ... [2023-02-17 06:54:13,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a1a5154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:54:13, skipping insertion in model container [2023-02-17 06:54:13,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 06:54:13" (1/1) ... [2023-02-17 06:54:13,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 06:54:13,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 06:54:13,974 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/cohencu-ll_valuebound50.c[588,601] [2023-02-17 06:54:14,009 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 06:54:14,021 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 06:54:14,033 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/cohencu-ll_valuebound50.c[588,601] [2023-02-17 06:54:14,059 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 06:54:14,073 INFO L208 MainTranslator]: Completed translation [2023-02-17 06:54:14,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:54:14 WrapperNode [2023-02-17 06:54:14,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 06:54:14,075 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 06:54:14,075 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 06:54:14,076 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 06:54:14,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:54:14" (1/1) ... [2023-02-17 06:54:14,095 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:54:14" (1/1) ... [2023-02-17 06:54:14,117 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2023-02-17 06:54:14,118 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 06:54:14,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 06:54:14,118 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 06:54:14,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 06:54:14,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:54:14" (1/1) ... [2023-02-17 06:54:14,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:54:14" (1/1) ... [2023-02-17 06:54:14,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:54:14" (1/1) ... [2023-02-17 06:54:14,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:54:14" (1/1) ... [2023-02-17 06:54:14,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:54:14" (1/1) ... [2023-02-17 06:54:14,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:54:14" (1/1) ... [2023-02-17 06:54:14,148 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:54:14" (1/1) ... [2023-02-17 06:54:14,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:54:14" (1/1) ... [2023-02-17 06:54:14,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 06:54:14,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 06:54:14,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 06:54:14,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 06:54:14,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:54:14" (1/1) ... [2023-02-17 06:54:14,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 06:54:14,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 06:54:14,186 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) [2023-02-17 06:54:14,210 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 [2023-02-17 06:54:14,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 06:54:14,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 06:54:14,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 06:54:14,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 06:54:14,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-17 06:54:14,222 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-17 06:54:14,273 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 06:54:14,274 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 06:54:14,443 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 06:54:14,448 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 06:54:14,448 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-17 06:54:14,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 06:54:14 BoogieIcfgContainer [2023-02-17 06:54:14,450 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 06:54:14,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 06:54:14,452 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 06:54:14,455 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 06:54:14,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 06:54:13" (1/3) ... [2023-02-17 06:54:14,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e5c7068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 06:54:14, skipping insertion in model container [2023-02-17 06:54:14,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:54:14" (2/3) ... [2023-02-17 06:54:14,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e5c7068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 06:54:14, skipping insertion in model container [2023-02-17 06:54:14,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 06:54:14" (3/3) ... [2023-02-17 06:54:14,457 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound50.c [2023-02-17 06:54:14,472 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 06:54:14,472 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 06:54:14,510 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 06:54:14,516 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;@63342567, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 06:54:14,516 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 06:54:14,520 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-17 06:54:14,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 06:54:14,529 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 06:54:14,530 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 06:54:14,531 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 06:54:14,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 06:54:14,537 INFO L85 PathProgramCache]: Analyzing trace with hash -588951690, now seen corresponding path program 1 times [2023-02-17 06:54:14,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 06:54:14,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616278882] [2023-02-17 06:54:14,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:54:14,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 06:54:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 06:54:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 06:54:14,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 06:54:14,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616278882] [2023-02-17 06:54:14,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616278882] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 06:54:14,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 06:54:14,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 06:54:14,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743224485] [2023-02-17 06:54:14,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 06:54:14,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 06:54:14,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 06:54:14,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 06:54:14,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 06:54:14,776 INFO L87 Difference]: Start difference. First operand has 27 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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) [2023-02-17 06:54:14,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 06:54:14,805 INFO L93 Difference]: Finished difference Result 51 states and 89 transitions. [2023-02-17 06:54:14,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 06:54:14,808 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 [2023-02-17 06:54:14,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 06:54:14,814 INFO L225 Difference]: With dead ends: 51 [2023-02-17 06:54:14,814 INFO L226 Difference]: Without dead ends: 23 [2023-02-17 06:54:14,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 06:54:14,822 INFO L413 NwaCegarLoop]: 37 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, 37 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 [2023-02-17 06:54:14,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 06:54:14,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-17 06:54:14,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-02-17 06:54:14,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-17 06:54:14,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2023-02-17 06:54:14,860 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 9 [2023-02-17 06:54:14,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 06:54:14,861 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2023-02-17 06:54:14,861 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) [2023-02-17 06:54:14,861 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2023-02-17 06:54:14,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 06:54:14,862 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 06:54:14,862 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 06:54:14,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 06:54:14,863 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 06:54:14,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 06:54:14,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1187604804, now seen corresponding path program 1 times [2023-02-17 06:54:14,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 06:54:14,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025581621] [2023-02-17 06:54:14,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:54:14,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 06:54:14,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 06:54:15,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 06:54:15,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 06:54:15,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025581621] [2023-02-17 06:54:15,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025581621] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 06:54:15,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 06:54:15,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 06:54:15,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001624622] [2023-02-17 06:54:15,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 06:54:15,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 06:54:15,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 06:54:15,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 06:54:15,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 06:54:15,054 INFO L87 Difference]: Start difference. First operand 23 states and 33 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) [2023-02-17 06:54:15,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 06:54:15,187 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2023-02-17 06:54:15,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 06:54:15,188 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 [2023-02-17 06:54:15,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 06:54:15,189 INFO L225 Difference]: With dead ends: 29 [2023-02-17 06:54:15,189 INFO L226 Difference]: Without dead ends: 27 [2023-02-17 06:54:15,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 06:54:15,190 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 06:54:15,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 63 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 06:54:15,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-17 06:54:15,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-02-17 06:54:15,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 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) [2023-02-17 06:54:15,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2023-02-17 06:54:15,204 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 9 [2023-02-17 06:54:15,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 06:54:15,204 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2023-02-17 06:54:15,204 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) [2023-02-17 06:54:15,204 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2023-02-17 06:54:15,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-17 06:54:15,205 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 06:54:15,205 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 06:54:15,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 06:54:15,206 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 06:54:15,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 06:54:15,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1137950087, now seen corresponding path program 1 times [2023-02-17 06:54:15,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 06:54:15,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725155041] [2023-02-17 06:54:15,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:54:15,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 06:54:15,219 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 06:54:15,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069398458] [2023-02-17 06:54:15,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:54:15,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:54:15,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 06:54:15,223 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) [2023-02-17 06:54:15,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 06:54:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 06:54:15,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 06:54:15,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 06:54:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 06:54:15,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 06:54:15,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 06:54:15,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 06:54:15,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725155041] [2023-02-17 06:54:15,458 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 06:54:15,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069398458] [2023-02-17 06:54:15,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069398458] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 06:54:15,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 06:54:15,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-17 06:54:15,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144780827] [2023-02-17 06:54:15,459 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 06:54:15,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 06:54:15,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 06:54:15,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 06:54:15,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-17 06:54:15,462 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 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) [2023-02-17 06:54:15,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 06:54:15,862 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2023-02-17 06:54:15,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 06:54:15,863 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 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 14 [2023-02-17 06:54:15,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 06:54:15,866 INFO L225 Difference]: With dead ends: 52 [2023-02-17 06:54:15,866 INFO L226 Difference]: Without dead ends: 50 [2023-02-17 06:54:15,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-17 06:54:15,867 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 06:54:15,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 60 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 06:54:15,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-17 06:54:15,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2023-02-17 06:54:15,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 21 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-17 06:54:15,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 65 transitions. [2023-02-17 06:54:15,900 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 65 transitions. Word has length 14 [2023-02-17 06:54:15,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 06:54:15,901 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 65 transitions. [2023-02-17 06:54:15,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 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) [2023-02-17 06:54:15,901 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 65 transitions. [2023-02-17 06:54:15,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-17 06:54:15,902 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 06:54:15,902 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 06:54:15,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-17 06:54:16,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:54:16,109 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 06:54:16,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 06:54:16,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1500531996, now seen corresponding path program 1 times [2023-02-17 06:54:16,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 06:54:16,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224449148] [2023-02-17 06:54:16,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:54:16,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 06:54:16,132 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 06:54:16,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1875043432] [2023-02-17 06:54:16,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:54:16,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:54:16,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 06:54:16,144 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) [2023-02-17 06:54:16,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 06:54:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 06:54:16,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 06:54:16,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 06:54:16,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 06:54:16,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 06:54:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 06:54:16,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 06:54:16,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224449148] [2023-02-17 06:54:16,344 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 06:54:16,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875043432] [2023-02-17 06:54:16,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875043432] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 06:54:16,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 06:54:16,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-17 06:54:16,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366722400] [2023-02-17 06:54:16,349 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 06:54:16,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 06:54:16,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 06:54:16,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 06:54:16,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-17 06:54:16,351 INFO L87 Difference]: Start difference. First operand 47 states and 65 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 06:54:16,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 06:54:16,586 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2023-02-17 06:54:16,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 06:54:16,587 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 19 [2023-02-17 06:54:16,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 06:54:16,588 INFO L225 Difference]: With dead ends: 54 [2023-02-17 06:54:16,588 INFO L226 Difference]: Without dead ends: 52 [2023-02-17 06:54:16,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-17 06:54:16,589 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 06:54:16,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 47 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 06:54:16,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-17 06:54:16,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-02-17 06:54:16,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-17 06:54:16,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2023-02-17 06:54:16,611 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 19 [2023-02-17 06:54:16,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 06:54:16,612 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2023-02-17 06:54:16,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 06:54:16,612 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2023-02-17 06:54:16,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 06:54:16,613 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 06:54:16,613 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 06:54:16,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 06:54:16,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-02-17 06:54:16,820 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 06:54:16,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 06:54:16,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1926539111, now seen corresponding path program 1 times [2023-02-17 06:54:16,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 06:54:16,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918173187] [2023-02-17 06:54:16,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:54:16,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 06:54:16,831 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 06:54:16,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1079224074] [2023-02-17 06:54:16,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:54:16,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:54:16,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 06:54:16,848 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) [2023-02-17 06:54:16,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 06:54:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 06:54:16,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 06:54:16,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 06:54:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 06:54:16,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 06:54:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 06:54:17,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 06:54:17,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918173187] [2023-02-17 06:54:17,058 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 06:54:17,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079224074] [2023-02-17 06:54:17,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079224074] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 06:54:17,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 06:54:17,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-17 06:54:17,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880926661] [2023-02-17 06:54:17,059 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 06:54:17,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 06:54:17,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 06:54:17,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 06:54:17,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-17 06:54:17,061 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-17 06:54:17,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 06:54:17,851 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2023-02-17 06:54:17,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 06:54:17,852 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) Word has length 24 [2023-02-17 06:54:17,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 06:54:17,853 INFO L225 Difference]: With dead ends: 67 [2023-02-17 06:54:17,853 INFO L226 Difference]: Without dead ends: 58 [2023-02-17 06:54:17,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-17 06:54:17,855 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-17 06:54:17,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 60 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-17 06:54:17,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-17 06:54:17,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-02-17 06:54:17,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 31 states have (on average 1.064516129032258) internal successors, (33), 33 states have internal predecessors, (33), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-02-17 06:54:17,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2023-02-17 06:54:17,875 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 24 [2023-02-17 06:54:17,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 06:54:17,876 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2023-02-17 06:54:17,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-17 06:54:17,876 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2023-02-17 06:54:17,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-17 06:54:17,877 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 06:54:17,877 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 06:54:17,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 06:54:18,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:54:18,086 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 06:54:18,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 06:54:18,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1495173479, now seen corresponding path program 1 times [2023-02-17 06:54:18,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 06:54:18,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259817693] [2023-02-17 06:54:18,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:54:18,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 06:54:18,102 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 06:54:18,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872382793] [2023-02-17 06:54:18,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:54:18,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:54:18,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 06:54:18,105 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) [2023-02-17 06:54:18,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 06:54:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 06:54:18,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-17 06:54:18,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 06:54:18,196 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-17 06:54:18,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 06:54:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-17 06:54:18,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 06:54:18,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259817693] [2023-02-17 06:54:18,293 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 06:54:18,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872382793] [2023-02-17 06:54:18,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872382793] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 06:54:18,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 06:54:18,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2023-02-17 06:54:18,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898319585] [2023-02-17 06:54:18,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 06:54:18,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 06:54:18,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 06:54:18,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 06:54:18,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-02-17 06:54:18,298 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2023-02-17 06:54:21,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.99s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:54:21,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 06:54:21,759 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2023-02-17 06:54:21,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 06:54:21,759 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) Word has length 46 [2023-02-17 06:54:21,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 06:54:21,761 INFO L225 Difference]: With dead ends: 82 [2023-02-17 06:54:21,761 INFO L226 Difference]: Without dead ends: 80 [2023-02-17 06:54:21,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-02-17 06:54:21,762 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 22 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 73 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-02-17 06:54:21,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 62 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 281 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2023-02-17 06:54:21,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-17 06:54:21,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2023-02-17 06:54:21,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 45 states have internal predecessors, (45), 26 states have call successors, (26), 10 states have call predecessors, (26), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2023-02-17 06:54:21,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2023-02-17 06:54:21,796 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 46 [2023-02-17 06:54:21,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 06:54:21,797 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2023-02-17 06:54:21,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2023-02-17 06:54:21,797 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2023-02-17 06:54:21,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-17 06:54:21,800 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 06:54:21,800 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 06:54:21,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 06:54:22,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:54:22,007 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 06:54:22,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 06:54:22,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1498221753, now seen corresponding path program 2 times [2023-02-17 06:54:22,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 06:54:22,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051893897] [2023-02-17 06:54:22,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:54:22,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 06:54:22,017 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 06:54:22,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [210904275] [2023-02-17 06:54:22,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 06:54:22,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:54:22,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 06:54:22,019 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) [2023-02-17 06:54:22,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 06:54:22,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 06:54:22,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 06:54:22,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-17 06:54:22,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 06:54:22,144 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-17 06:54:22,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 06:54:22,224 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 19 proven. 25 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-02-17 06:54:22,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 06:54:22,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051893897] [2023-02-17 06:54:22,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 06:54:22,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210904275] [2023-02-17 06:54:22,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210904275] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 06:54:22,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 06:54:22,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2023-02-17 06:54:22,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385187279] [2023-02-17 06:54:22,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 06:54:22,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 06:54:22,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 06:54:22,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 06:54:22,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-02-17 06:54:22,228 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-17 06:54:22,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 06:54:22,920 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2023-02-17 06:54:22,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 06:54:22,920 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 5 states have call successors, (15) Word has length 56 [2023-02-17 06:54:22,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 06:54:22,922 INFO L225 Difference]: With dead ends: 86 [2023-02-17 06:54:22,922 INFO L226 Difference]: Without dead ends: 81 [2023-02-17 06:54:22,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-02-17 06:54:22,923 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 19 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-17 06:54:22,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 74 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-17 06:54:22,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-17 06:54:22,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-02-17 06:54:22,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 48 states have internal predecessors, (48), 24 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-17 06:54:22,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2023-02-17 06:54:22,941 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 56 [2023-02-17 06:54:22,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 06:54:22,942 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2023-02-17 06:54:22,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-17 06:54:22,943 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2023-02-17 06:54:22,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-17 06:54:22,944 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 06:54:22,944 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 06:54:22,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 06:54:23,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:54:23,151 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 06:54:23,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 06:54:23,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1061977627, now seen corresponding path program 1 times [2023-02-17 06:54:23,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 06:54:23,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507563952] [2023-02-17 06:54:23,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:54:23,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 06:54:23,160 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 06:54:23,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1923307636] [2023-02-17 06:54:23,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:54:23,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:54:23,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 06:54:23,163 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) [2023-02-17 06:54:23,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 06:54:23,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 06:54:23,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-17 06:54:23,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 06:54:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-02-17 06:54:23,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 06:54:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-02-17 06:54:23,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 06:54:23,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507563952] [2023-02-17 06:54:23,459 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 06:54:23,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923307636] [2023-02-17 06:54:23,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923307636] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 06:54:23,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 06:54:23,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2023-02-17 06:54:23,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749107487] [2023-02-17 06:54:23,460 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 06:54:23,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 06:54:23,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 06:54:23,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 06:54:23,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-02-17 06:54:23,463 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-02-17 06:54:23,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 06:54:23,989 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2023-02-17 06:54:23,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 06:54:23,990 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 67 [2023-02-17 06:54:23,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 06:54:23,991 INFO L225 Difference]: With dead ends: 95 [2023-02-17 06:54:23,991 INFO L226 Difference]: Without dead ends: 93 [2023-02-17 06:54:23,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2023-02-17 06:54:23,992 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 30 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 06:54:23,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 157 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 06:54:23,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-02-17 06:54:24,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2023-02-17 06:54:24,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 52 states have internal predecessors, (53), 29 states have call successors, (29), 12 states have call predecessors, (29), 12 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2023-02-17 06:54:24,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2023-02-17 06:54:24,032 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 67 [2023-02-17 06:54:24,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 06:54:24,032 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2023-02-17 06:54:24,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-02-17 06:54:24,033 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2023-02-17 06:54:24,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-17 06:54:24,034 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 06:54:24,034 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 06:54:24,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 06:54:24,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:54:24,241 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 06:54:24,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 06:54:24,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1246911088, now seen corresponding path program 1 times [2023-02-17 06:54:24,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 06:54:24,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835881805] [2023-02-17 06:54:24,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:54:24,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 06:54:24,258 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 06:54:24,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801532756] [2023-02-17 06:54:24,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:54:24,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:54:24,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 06:54:24,260 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) [2023-02-17 06:54:24,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 06:54:24,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 06:54:24,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-17 06:54:24,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 06:54:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-02-17 06:54:24,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 06:54:24,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 06:54:24,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835881805] [2023-02-17 06:54:24,453 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 06:54:24,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801532756] [2023-02-17 06:54:24,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801532756] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 06:54:24,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 06:54:24,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-02-17 06:54:24,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372677143] [2023-02-17 06:54:24,454 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 06:54:24,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 06:54:24,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 06:54:24,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 06:54:24,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-02-17 06:54:24,456 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-17 06:54:24,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 06:54:24,664 INFO L93 Difference]: Finished difference Result 97 states and 114 transitions. [2023-02-17 06:54:24,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 06:54:24,665 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 72 [2023-02-17 06:54:24,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 06:54:24,670 INFO L225 Difference]: With dead ends: 97 [2023-02-17 06:54:24,670 INFO L226 Difference]: Without dead ends: 88 [2023-02-17 06:54:24,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-02-17 06:54:24,673 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 20 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 06:54:24,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 107 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 06:54:24,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-17 06:54:24,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-02-17 06:54:24,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 51 states have internal predecessors, (52), 26 states have call successors, (26), 12 states have call predecessors, (26), 12 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2023-02-17 06:54:24,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 103 transitions. [2023-02-17 06:54:24,705 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 103 transitions. Word has length 72 [2023-02-17 06:54:24,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 06:54:24,705 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 103 transitions. [2023-02-17 06:54:24,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-17 06:54:24,706 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 103 transitions. [2023-02-17 06:54:24,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-02-17 06:54:24,710 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 06:54:24,711 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-17 06:54:24,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 06:54:24,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:54:24,922 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 06:54:24,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 06:54:24,923 INFO L85 PathProgramCache]: Analyzing trace with hash -322800313, now seen corresponding path program 3 times [2023-02-17 06:54:24,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 06:54:24,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884497406] [2023-02-17 06:54:24,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:54:24,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 06:54:24,930 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 06:54:24,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272611314] [2023-02-17 06:54:24,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 06:54:24,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:54:24,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 06:54:24,932 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) [2023-02-17 06:54:24,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 06:54:24,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-17 06:54:24,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 06:54:24,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-17 06:54:24,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 06:54:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 55 proven. 24 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-17 06:54:25,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 06:54:25,319 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 55 proven. 24 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-17 06:54:25,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 06:54:25,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884497406] [2023-02-17 06:54:25,320 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 06:54:25,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272611314] [2023-02-17 06:54:25,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272611314] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 06:54:25,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 06:54:25,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-02-17 06:54:25,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892810986] [2023-02-17 06:54:25,321 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 06:54:25,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 06:54:25,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 06:54:25,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 06:54:25,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-02-17 06:54:25,323 INFO L87 Difference]: Start difference. First operand 88 states and 103 transitions. Second operand has 16 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) [2023-02-17 06:54:28,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:54:28,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 06:54:28,616 INFO L93 Difference]: Finished difference Result 110 states and 123 transitions. [2023-02-17 06:54:28,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 06:54:28,616 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) Word has length 78 [2023-02-17 06:54:28,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 06:54:28,619 INFO L225 Difference]: With dead ends: 110 [2023-02-17 06:54:28,620 INFO L226 Difference]: Without dead ends: 107 [2023-02-17 06:54:28,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-02-17 06:54:28,621 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 19 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 54 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-02-17 06:54:28,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 99 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 484 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2023-02-17 06:54:28,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-17 06:54:28,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2023-02-17 06:54:28,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 63 states have internal predecessors, (64), 27 states have call successors, (27), 16 states have call predecessors, (27), 16 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-02-17 06:54:28,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2023-02-17 06:54:28,662 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 78 [2023-02-17 06:54:28,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 06:54:28,663 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2023-02-17 06:54:28,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) [2023-02-17 06:54:28,663 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2023-02-17 06:54:28,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-02-17 06:54:28,666 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 06:54:28,667 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 06:54:28,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 06:54:28,873 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,SelfDestructingSolverStorable9 [2023-02-17 06:54:28,873 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 06:54:28,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 06:54:28,874 INFO L85 PathProgramCache]: Analyzing trace with hash -674604307, now seen corresponding path program 2 times [2023-02-17 06:54:28,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 06:54:28,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634159685] [2023-02-17 06:54:28,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:54:28,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 06:54:28,885 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 06:54:28,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395078175] [2023-02-17 06:54:28,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 06:54:28,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:54:28,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 06:54:28,887 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) [2023-02-17 06:54:28,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 06:54:28,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 06:54:28,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 06:54:28,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-17 06:54:28,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 06:54:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 78 proven. 25 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2023-02-17 06:54:29,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 06:54:29,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 06:54:29,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634159685] [2023-02-17 06:54:29,387 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 06:54:29,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395078175] [2023-02-17 06:54:29,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395078175] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 06:54:29,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 06:54:29,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-02-17 06:54:29,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332984574] [2023-02-17 06:54:29,388 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 06:54:29,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 06:54:29,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 06:54:29,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 06:54:29,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-02-17 06:54:29,390 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2023-02-17 06:54:29,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 06:54:29,760 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2023-02-17 06:54:29,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 06:54:29,760 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 99 [2023-02-17 06:54:29,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 06:54:29,761 INFO L225 Difference]: With dead ends: 111 [2023-02-17 06:54:29,761 INFO L226 Difference]: Without dead ends: 98 [2023-02-17 06:54:29,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-02-17 06:54:29,762 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 06:54:29,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 86 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 06:54:29,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-02-17 06:54:29,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2023-02-17 06:54:29,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 59 states have internal predecessors, (60), 24 states have call successors, (24), 15 states have call predecessors, (24), 15 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-02-17 06:54:29,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2023-02-17 06:54:29,788 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 99 [2023-02-17 06:54:29,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 06:54:29,788 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2023-02-17 06:54:29,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2023-02-17 06:54:29,788 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2023-02-17 06:54:29,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-02-17 06:54:29,789 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 06:54:29,790 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 06:54:29,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-17 06:54:29,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:54:29,999 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 06:54:29,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 06:54:29,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1837317061, now seen corresponding path program 2 times [2023-02-17 06:54:29,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 06:54:30,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550089182] [2023-02-17 06:54:30,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:54:30,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 06:54:30,009 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 06:54:30,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470468152] [2023-02-17 06:54:30,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 06:54:30,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:54:30,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 06:54:30,011 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) [2023-02-17 06:54:30,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 06:54:30,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 06:54:30,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 06:54:30,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-17 06:54:30,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 06:54:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 101 proven. 43 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2023-02-17 06:54:30,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 06:54:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 122 proven. 1 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2023-02-17 06:54:30,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 06:54:30,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550089182] [2023-02-17 06:54:30,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 06:54:30,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470468152] [2023-02-17 06:54:30,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470468152] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 06:54:30,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 06:54:30,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2023-02-17 06:54:30,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340659869] [2023-02-17 06:54:30,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 06:54:30,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-17 06:54:30,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 06:54:30,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-17 06:54:30,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-02-17 06:54:30,942 INFO L87 Difference]: Start difference. First operand 98 states and 107 transitions. Second operand has 17 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2023-02-17 06:54:33,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 06:54:33,294 INFO L93 Difference]: Finished difference Result 123 states and 138 transitions. [2023-02-17 06:54:33,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 06:54:33,295 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 121 [2023-02-17 06:54:33,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 06:54:33,296 INFO L225 Difference]: With dead ends: 123 [2023-02-17 06:54:33,296 INFO L226 Difference]: Without dead ends: 121 [2023-02-17 06:54:33,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 223 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-02-17 06:54:33,297 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-02-17 06:54:33,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 108 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-02-17 06:54:33,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-02-17 06:54:33,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2023-02-17 06:54:33,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 71 states have internal predecessors, (72), 30 states have call successors, (30), 18 states have call predecessors, (30), 18 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2023-02-17 06:54:33,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 131 transitions. [2023-02-17 06:54:33,336 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 131 transitions. Word has length 121 [2023-02-17 06:54:33,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 06:54:33,337 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 131 transitions. [2023-02-17 06:54:33,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2023-02-17 06:54:33,337 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 131 transitions. [2023-02-17 06:54:33,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-02-17 06:54:33,338 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 06:54:33,338 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 06:54:33,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-17 06:54:33,548 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,SelfDestructingSolverStorable11 [2023-02-17 06:54:33,549 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 06:54:33,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 06:54:33,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1974193296, now seen corresponding path program 3 times [2023-02-17 06:54:33,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 06:54:33,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149943773] [2023-02-17 06:54:33,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:54:33,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 06:54:33,566 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 06:54:33,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896333276] [2023-02-17 06:54:33,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 06:54:33,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:54:33,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 06:54:33,569 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) [2023-02-17 06:54:33,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 06:54:34,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-17 06:54:34,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 06:54:34,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-17 06:54:34,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 06:54:34,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 181 proven. 69 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-02-17 06:54:34,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 06:54:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 148 proven. 39 refuted. 0 times theorem prover too weak. 823 trivial. 0 not checked. [2023-02-17 06:54:37,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 06:54:37,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149943773] [2023-02-17 06:54:37,683 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 06:54:37,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896333276] [2023-02-17 06:54:37,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896333276] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 06:54:37,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 06:54:37,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2023-02-17 06:54:37,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301607420] [2023-02-17 06:54:37,684 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 06:54:37,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 06:54:37,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 06:54:37,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 06:54:37,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-02-17 06:54:37,686 INFO L87 Difference]: Start difference. First operand 118 states and 131 transitions. Second operand has 18 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (31), 8 states have call predecessors, (31), 9 states have call successors, (31) [2023-02-17 06:54:42,361 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 [] [2023-02-17 06:54:44,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:54:45,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:54:47,937 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 [] [2023-02-17 06:54:49,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 06:54:49,326 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2023-02-17 06:54:49,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 06:54:49,327 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (31), 8 states have call predecessors, (31), 9 states have call successors, (31) Word has length 126 [2023-02-17 06:54:49,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 06:54:49,328 INFO L225 Difference]: With dead ends: 124 [2023-02-17 06:54:49,328 INFO L226 Difference]: Without dead ends: 120 [2023-02-17 06:54:49,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 228 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2023-02-17 06:54:49,329 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 61 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2023-02-17 06:54:49,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 57 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 223 Invalid, 2 Unknown, 0 Unchecked, 10.2s Time] [2023-02-17 06:54:49,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-02-17 06:54:49,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2023-02-17 06:54:49,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 71 states have (on average 1.028169014084507) internal successors, (73), 72 states have internal predecessors, (73), 30 states have call successors, (30), 19 states have call predecessors, (30), 18 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2023-02-17 06:54:49,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2023-02-17 06:54:49,365 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 126 [2023-02-17 06:54:49,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 06:54:49,366 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2023-02-17 06:54:49,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (31), 8 states have call predecessors, (31), 9 states have call successors, (31) [2023-02-17 06:54:49,366 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2023-02-17 06:54:49,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-02-17 06:54:49,367 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 06:54:49,368 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 06:54:49,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-17 06:54:49,579 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,SelfDestructingSolverStorable12 [2023-02-17 06:54:49,579 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 06:54:49,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 06:54:49,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1520954085, now seen corresponding path program 1 times [2023-02-17 06:54:49,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 06:54:49,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128100106] [2023-02-17 06:54:49,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:54:49,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 06:54:49,589 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 06:54:49,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113015056] [2023-02-17 06:54:49,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:54:49,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:54:49,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 06:54:49,591 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) [2023-02-17 06:54:49,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-17 06:54:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 06:54:49,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-17 06:54:49,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 06:54:50,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 103 proven. 165 refuted. 0 times theorem prover too weak. 832 trivial. 0 not checked. [2023-02-17 06:54:50,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 06:54:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 103 proven. 165 refuted. 0 times theorem prover too weak. 832 trivial. 0 not checked. [2023-02-17 06:54:58,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 06:54:58,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128100106] [2023-02-17 06:54:58,334 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 06:54:58,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113015056] [2023-02-17 06:54:58,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113015056] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 06:54:58,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 06:54:58,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-02-17 06:54:58,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477321135] [2023-02-17 06:54:58,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 06:54:58,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 06:54:58,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 06:54:58,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 06:54:58,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=329, Unknown=3, NotChecked=0, Total=420 [2023-02-17 06:54:58,336 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 21 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 12 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (46), 11 states have call predecessors, (46), 12 states have call successors, (46) [2023-02-17 06:55:01,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:55:04,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:55:07,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.62s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:55:09,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:55:11,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:55:13,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:55:15,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:55:20,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:55:22,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:55:24,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:55:26,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:55:37,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:55:39,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:55:42,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.66s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:55:44,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:55:46,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:55:48,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:55:52,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:55:53,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:55:56,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.40s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:55:58,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:56:00,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:56:02,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:56:04,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:56:06,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:56:09,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:56:11,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.35s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:56:13,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:56:15,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:56:18,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:56:20,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:56:21,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 06:56:21,189 INFO L93 Difference]: Finished difference Result 167 states and 205 transitions. [2023-02-17 06:56:21,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-17 06:56:21,189 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 12 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (46), 11 states have call predecessors, (46), 12 states have call successors, (46) Word has length 131 [2023-02-17 06:56:21,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 06:56:21,191 INFO L225 Difference]: With dead ends: 167 [2023-02-17 06:56:21,191 INFO L226 Difference]: Without dead ends: 151 [2023-02-17 06:56:21,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 237 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=192, Invalid=674, Unknown=4, NotChecked=0, Total=870 [2023-02-17 06:56:21,192 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 38 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 85 mSolverCounterUnsat, 29 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 29 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.0s IncrementalHoareTripleChecker+Time [2023-02-17 06:56:21,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 136 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1016 Invalid, 29 Unknown, 0 Unchecked, 75.0s Time] [2023-02-17 06:56:21,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-02-17 06:56:21,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2023-02-17 06:56:21,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 49 states have call successors, (49), 20 states have call predecessors, (49), 19 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2023-02-17 06:56:21,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 180 transitions. [2023-02-17 06:56:21,261 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 180 transitions. Word has length 131 [2023-02-17 06:56:21,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 06:56:21,261 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 180 transitions. [2023-02-17 06:56:21,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 12 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (46), 11 states have call predecessors, (46), 12 states have call successors, (46) [2023-02-17 06:56:21,262 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 180 transitions. [2023-02-17 06:56:21,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-02-17 06:56:21,264 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 06:56:21,265 INFO L195 NwaCegarLoop]: trace histogram [49, 48, 48, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 06:56:21,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-17 06:56:21,470 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,SelfDestructingSolverStorable13 [2023-02-17 06:56:21,471 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 06:56:21,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 06:56:21,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1512061602, now seen corresponding path program 2 times [2023-02-17 06:56:21,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 06:56:21,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654305535] [2023-02-17 06:56:21,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:56:21,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 06:56:21,486 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 06:56:21,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372099024] [2023-02-17 06:56:21,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 06:56:21,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:56:21,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 06:56:21,488 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) [2023-02-17 06:56:21,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-17 06:56:21,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 06:56:21,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 06:56:21,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 95 conjunts are in the unsatisfiable core [2023-02-17 06:56:21,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 06:56:22,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4860 backedges. 364 proven. 260 refuted. 0 times theorem prover too weak. 4236 trivial. 0 not checked. [2023-02-17 06:56:22,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 06:56:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4860 backedges. 364 proven. 260 refuted. 0 times theorem prover too weak. 4236 trivial. 0 not checked. [2023-02-17 06:56:43,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 06:56:43,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654305535] [2023-02-17 06:56:43,656 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 06:56:43,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372099024] [2023-02-17 06:56:43,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372099024] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 06:56:43,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 06:56:43,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2023-02-17 06:56:43,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569524862] [2023-02-17 06:56:43,657 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 06:56:43,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-17 06:56:43,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 06:56:43,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-17 06:56:43,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=815, Unknown=7, NotChecked=0, Total=1056 [2023-02-17 06:56:43,660 INFO L87 Difference]: Start difference. First operand 151 states and 180 transitions. Second operand has 33 states, 27 states have (on average 2.074074074074074) internal successors, (56), 28 states have internal predecessors, (56), 24 states have call successors, (98), 3 states have call predecessors, (98), 2 states have return successors, (96), 22 states have call predecessors, (96), 24 states have call successors, (96) [2023-02-17 06:56:49,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:56:52,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:56:54,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:56:56,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:57:00,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.51s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:57:02,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:57:05,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 06:57:07,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:57:10,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:57:14,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.57s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:57:16,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:57:18,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:57:21,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:57:23,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:57:26,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:57:29,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:57:30,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:57:32,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:57:33,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:57:36,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:57:41,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:57:42,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:57:45,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.47s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:57:49,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:57:52,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:57:57,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:57:59,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:58:04,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:58:08,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 06:58:08,395 INFO L93 Difference]: Finished difference Result 261 states and 348 transitions. [2023-02-17 06:58:08,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-17 06:58:08,396 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 27 states have (on average 2.074074074074074) internal successors, (56), 28 states have internal predecessors, (56), 24 states have call successors, (98), 3 states have call predecessors, (98), 2 states have return successors, (96), 22 states have call predecessors, (96), 24 states have call successors, (96) Word has length 266 [2023-02-17 06:58:08,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 06:58:08,398 INFO L225 Difference]: With dead ends: 261 [2023-02-17 06:58:08,398 INFO L226 Difference]: Without dead ends: 241 [2023-02-17 06:58:08,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 495 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=599, Invalid=1649, Unknown=8, NotChecked=0, Total=2256 [2023-02-17 06:58:08,399 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 52 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 2640 mSolverCounterSat, 193 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 2852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 2640 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 79.3s IncrementalHoareTripleChecker+Time [2023-02-17 06:58:08,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 287 Invalid, 2852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 2640 Invalid, 19 Unknown, 0 Unchecked, 79.3s Time] [2023-02-17 06:58:08,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-02-17 06:58:08,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2023-02-17 06:58:08,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 117 states have (on average 1.0085470085470085) internal successors, (118), 117 states have internal predecessors, (118), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2023-02-17 06:58:08,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 315 transitions. [2023-02-17 06:58:08,610 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 315 transitions. Word has length 266 [2023-02-17 06:58:08,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 06:58:08,611 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 315 transitions. [2023-02-17 06:58:08,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 27 states have (on average 2.074074074074074) internal successors, (56), 28 states have internal predecessors, (56), 24 states have call successors, (98), 3 states have call predecessors, (98), 2 states have return successors, (96), 22 states have call predecessors, (96), 24 states have call successors, (96) [2023-02-17 06:58:08,611 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 315 transitions. [2023-02-17 06:58:08,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2023-02-17 06:58:08,619 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 06:58:08,619 INFO L195 NwaCegarLoop]: trace histogram [99, 98, 98, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 06:58:08,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-17 06:58:08,825 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,SelfDestructingSolverStorable14 [2023-02-17 06:58:08,825 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 06:58:08,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 06:58:08,826 INFO L85 PathProgramCache]: Analyzing trace with hash -48749890, now seen corresponding path program 3 times [2023-02-17 06:58:08,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 06:58:08,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557873755] [2023-02-17 06:58:08,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:58:08,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 06:58:08,841 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 06:58:08,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2067099259] [2023-02-17 06:58:08,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 06:58:08,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:58:08,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 06:58:08,843 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) [2023-02-17 06:58:08,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-17 06:58:08,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-17 06:58:08,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 06:58:08,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-17 06:58:08,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 06:58:15,822 INFO L134 CoverageAnalysis]: Checked inductivity of 20405 backedges. 1423 proven. 61 refuted. 0 times theorem prover too weak. 18921 trivial. 0 not checked. [2023-02-17 06:58:15,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 06:58:38,680 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse5 (* |c_ULTIMATE.start_main_~z~0#1| |c_ULTIMATE.start_main_~z~0#1|))) (let ((.cse1 (div (+ .cse5 (* (- 6) |c_ULTIMATE.start_main_~z~0#1|)) 12))) (let ((.cse0 (* .cse1 |c_ULTIMATE.start_main_~z~0#1|)) (.cse2 (* 3 |c_ULTIMATE.start_main_~z~0#1|)) (.cse7 (+ .cse1 1))) (let ((.cse3 (+ (+ (div (+ .cse0 (* (- 12) .cse1) .cse2) 18) (- 1)) .cse7)) (.cse4 (+ 6 (* 6 (+ 1 |c_ULTIMATE.start_main_~n~0#1|))))) (or (not (= (mod (+ .cse0 (* 6 .cse1) .cse2) 18) 0)) (not (= 0 (+ (+ (* (* 6 |c_ULTIMATE.start_main_~a~0#1|) .cse3) (- (* .cse3 .cse4))) (* 12 .cse3)))) (not (= (mod (+ .cse5 (* 6 |c_ULTIMATE.start_main_~z~0#1|)) 12) 0)) (= 0 (+ (+ (let ((.cse6 (+ .cse7 |c_ULTIMATE.start_main_~z~0#1|))) (+ (+ (+ (* (* 2 .cse6) .cse6) (- (* (* 3 .cse3) .cse4))) (- (* 18 .cse3))) (- (* 10 .cse6)))) (* 3 .cse4)) (- 10))) (not (= .cse4 (+ 6 |c_ULTIMATE.start_main_~z~0#1|)))))))) is different from true [2023-02-17 06:58:38,738 INFO L134 CoverageAnalysis]: Checked inductivity of 20405 backedges. 1501 proven. 63 refuted. 0 times theorem prover too weak. 18836 trivial. 5 not checked. [2023-02-17 06:58:38,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 06:58:38,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557873755] [2023-02-17 06:58:38,739 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 06:58:38,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067099259] [2023-02-17 06:58:38,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067099259] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 06:58:38,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 06:58:38,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2023-02-17 06:58:38,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416627674] [2023-02-17 06:58:38,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 06:58:38,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-17 06:58:38,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 06:58:38,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-17 06:58:38,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=269, Unknown=10, NotChecked=34, Total=380 [2023-02-17 06:58:38,742 INFO L87 Difference]: Start difference. First operand 241 states and 315 transitions. Second operand has 20 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 11 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (33), 11 states have call predecessors, (33), 11 states have call successors, (33) [2023-02-17 06:58:41,100 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 [] [2023-02-17 06:58:43,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 06:58:47,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []