./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound10.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 1c9e40c4fcbf0a2270c810eae17f30e2b9a539f72a78b9b7061997095813940b --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 12:33:11,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 12:33:11,736 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 12:33:11,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 12:33:11,755 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 12:33:11,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 12:33:11,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 12:33:11,758 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 12:33:11,759 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 12:33:11,759 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 12:33:11,760 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 12:33:11,760 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 12:33:11,761 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 12:33:11,761 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 12:33:11,762 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 12:33:11,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 12:33:11,763 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 12:33:11,764 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 12:33:11,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 12:33:11,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 12:33:11,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 12:33:11,768 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 12:33:11,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 12:33:11,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 12:33:11,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 12:33:11,772 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 12:33:11,772 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 12:33:11,772 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 12:33:11,773 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 12:33:11,773 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 12:33:11,774 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 12:33:11,774 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 12:33:11,775 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 12:33:11,775 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 12:33:11,776 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 12:33:11,776 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 12:33:11,777 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 12:33:11,777 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 12:33:11,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 12:33:11,778 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 12:33:11,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 12:33:11,781 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 12:33:11,817 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 12:33:11,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 12:33:11,818 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 12:33:11,818 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 12:33:11,818 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 12:33:11,819 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 12:33:11,820 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 12:33:11,820 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 12:33:11,820 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 12:33:11,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 12:33:11,821 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 12:33:11,821 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 12:33:11,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 12:33:11,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 12:33:11,821 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 12:33:11,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 12:33:11,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 12:33:11,822 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 12:33:11,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 12:33:11,823 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 12:33:11,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 12:33:11,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 12:33:11,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 12:33:11,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 12:33:11,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 12:33:11,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 12:33:11,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 12:33:11,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 12:33:11,824 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 12:33:11,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 12:33:11,825 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 12:33:11,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 12:33:11,825 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 12:33:11,825 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 12:33:11,825 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 12:33:11,825 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c9e40c4fcbf0a2270c810eae17f30e2b9a539f72a78b9b7061997095813940b [2023-02-15 12:33:11,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 12:33:11,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 12:33:11,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 12:33:11,999 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 12:33:12,000 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 12:33:12,000 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound10.c [2023-02-15 12:33:12,937 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 12:33:13,110 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 12:33:13,110 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound10.c [2023-02-15 12:33:13,115 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef257d345/177a43bad7db46a49c8d70c517dbcc32/FLAG633c8ee02 [2023-02-15 12:33:13,129 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef257d345/177a43bad7db46a49c8d70c517dbcc32 [2023-02-15 12:33:13,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 12:33:13,132 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 12:33:13,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 12:33:13,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 12:33:13,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 12:33:13,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:33:13" (1/1) ... [2023-02-15 12:33:13,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ed476a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:33:13, skipping insertion in model container [2023-02-15 12:33:13,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:33:13" (1/1) ... [2023-02-15 12:33:13,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 12:33:13,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 12:33:13,253 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/ps6-ll_valuebound10.c[458,471] [2023-02-15 12:33:13,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 12:33:13,285 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 12:33:13,296 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/ps6-ll_valuebound10.c[458,471] [2023-02-15 12:33:13,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 12:33:13,313 INFO L208 MainTranslator]: Completed translation [2023-02-15 12:33:13,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:33:13 WrapperNode [2023-02-15 12:33:13,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 12:33:13,315 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 12:33:13,315 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 12:33:13,315 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 12:33:13,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:33:13" (1/1) ... [2023-02-15 12:33:13,324 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:33:13" (1/1) ... [2023-02-15 12:33:13,338 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2023-02-15 12:33:13,339 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 12:33:13,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 12:33:13,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 12:33:13,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 12:33:13,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:33:13" (1/1) ... [2023-02-15 12:33:13,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:33:13" (1/1) ... [2023-02-15 12:33:13,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:33:13" (1/1) ... [2023-02-15 12:33:13,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:33:13" (1/1) ... [2023-02-15 12:33:13,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:33:13" (1/1) ... [2023-02-15 12:33:13,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:33:13" (1/1) ... [2023-02-15 12:33:13,351 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:33:13" (1/1) ... [2023-02-15 12:33:13,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:33:13" (1/1) ... [2023-02-15 12:33:13,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 12:33:13,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 12:33:13,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 12:33:13,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 12:33:13,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:33:13" (1/1) ... [2023-02-15 12:33:13,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 12:33:13,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:33:13,375 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 12:33:13,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 12:33:13,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 12:33:13,407 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-15 12:33:13,407 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-15 12:33:13,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 12:33:13,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 12:33:13,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 12:33:13,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 12:33:13,410 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 12:33:13,450 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 12:33:13,451 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 12:33:13,536 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 12:33:13,548 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 12:33:13,548 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-15 12:33:13,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:33:13 BoogieIcfgContainer [2023-02-15 12:33:13,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 12:33:13,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 12:33:13,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 12:33:13,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 12:33:13,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 12:33:13" (1/3) ... [2023-02-15 12:33:13,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a2742c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:33:13, skipping insertion in model container [2023-02-15 12:33:13,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:33:13" (2/3) ... [2023-02-15 12:33:13,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a2742c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:33:13, skipping insertion in model container [2023-02-15 12:33:13,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:33:13" (3/3) ... [2023-02-15 12:33:13,556 INFO L112 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound10.c [2023-02-15 12:33:13,568 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 12:33:13,568 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 12:33:13,605 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 12:33:13,610 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;@5e047ca0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 12:33:13,610 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 12:33:13,615 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 12:33:13,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 12:33:13,620 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:33:13,621 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:33:13,621 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:33:13,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:33:13,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1845349065, now seen corresponding path program 1 times [2023-02-15 12:33:13,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:33:13,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490332288] [2023-02-15 12:33:13,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:33:13,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:33:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:33:13,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:33:13,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490332288] [2023-02-15 12:33:13,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 12:33:13,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503816464] [2023-02-15 12:33:13,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:33:13,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:33:13,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:33:13,729 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:33:13,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 12:33:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:33:13,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 12:33:13,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:33:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 12:33:13,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 12:33:13,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503816464] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:33:13,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:33:13,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 12:33:13,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350831398] [2023-02-15 12:33:13,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:33:13,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 12:33:13,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:33:13,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 12:33:13,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 12:33:13,860 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 12:33:13,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:33:13,883 INFO L93 Difference]: Finished difference Result 45 states and 63 transitions. [2023-02-15 12:33:13,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 12:33:13,885 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-02-15 12:33:13,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:33:13,893 INFO L225 Difference]: With dead ends: 45 [2023-02-15 12:33:13,893 INFO L226 Difference]: Without dead ends: 20 [2023-02-15 12:33:13,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 12:33:13,899 INFO L413 NwaCegarLoop]: 27 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, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:33:13,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:33:13,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-15 12:33:13,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-02-15 12:33:13,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 12:33:13,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-02-15 12:33:13,924 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 18 [2023-02-15 12:33:13,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:33:13,924 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-02-15 12:33:13,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 12:33:13,925 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-02-15 12:33:13,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 12:33:13,926 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:33:13,926 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:33:13,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 12:33:14,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-15 12:33:14,131 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:33:14,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:33:14,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1506842435, now seen corresponding path program 1 times [2023-02-15 12:33:14,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:33:14,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594201477] [2023-02-15 12:33:14,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:33:14,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:33:14,143 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:33:14,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546231228] [2023-02-15 12:33:14,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:33:14,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:33:14,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:33:14,146 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:33:14,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 12:33:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:33:14,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 12:33:14,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:33:14,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 12:33:14,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 12:33:14,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:33:14,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594201477] [2023-02-15 12:33:14,273 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:33:14,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546231228] [2023-02-15 12:33:14,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546231228] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:33:14,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:33:14,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 12:33:14,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771512799] [2023-02-15 12:33:14,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:33:14,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 12:33:14,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:33:14,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 12:33:14,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:33:14,275 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 12:33:14,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:33:14,508 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-02-15 12:33:14,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 12:33:14,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-02-15 12:33:14,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:33:14,509 INFO L225 Difference]: With dead ends: 31 [2023-02-15 12:33:14,510 INFO L226 Difference]: Without dead ends: 27 [2023-02-15 12:33:14,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 12:33:14,511 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:33:14,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 69 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:33:14,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-15 12:33:14,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-02-15 12:33:14,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 12:33:14,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-02-15 12:33:14,517 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2023-02-15 12:33:14,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:33:14,517 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-02-15 12:33:14,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 12:33:14,517 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-02-15 12:33:14,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 12:33:14,518 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:33:14,518 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:33:14,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 12:33:14,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-15 12:33:14,723 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:33:14,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:33:14,723 INFO L85 PathProgramCache]: Analyzing trace with hash 903983968, now seen corresponding path program 1 times [2023-02-15 12:33:14,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:33:14,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757655695] [2023-02-15 12:33:14,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:33:14,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:33:14,741 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:33:14,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081656044] [2023-02-15 12:33:14,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:33:14,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:33:14,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:33:14,749 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:33:14,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 12:33:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:33:14,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 12:33:14,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:33:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 12:33:14,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:33:15,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 12:33:15,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:33:15,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757655695] [2023-02-15 12:33:15,029 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:33:15,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081656044] [2023-02-15 12:33:15,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081656044] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 12:33:15,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 12:33:15,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-02-15 12:33:15,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533012654] [2023-02-15 12:33:15,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:33:15,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 12:33:15,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:33:15,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 12:33:15,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-02-15 12:33:15,032 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 12:33:15,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:33:15,066 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2023-02-15 12:33:15,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 12:33:15,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2023-02-15 12:33:15,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:33:15,067 INFO L225 Difference]: With dead ends: 33 [2023-02-15 12:33:15,067 INFO L226 Difference]: Without dead ends: 29 [2023-02-15 12:33:15,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-15 12:33:15,069 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:33:15,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 58 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:33:15,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-15 12:33:15,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-15 12:33:15,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 12:33:15,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-02-15 12:33:15,076 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2023-02-15 12:33:15,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:33:15,076 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-02-15 12:33:15,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 12:33:15,076 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-02-15 12:33:15,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 12:33:15,077 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:33:15,077 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:33:15,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-15 12:33:15,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:33:15,282 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:33:15,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:33:15,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1648043046, now seen corresponding path program 1 times [2023-02-15 12:33:15,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:33:15,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434781557] [2023-02-15 12:33:15,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:33:15,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:33:15,293 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:33:15,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668389810] [2023-02-15 12:33:15,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:33:15,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:33:15,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:33:15,295 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:33:15,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 12:33:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:33:15,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 12:33:15,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:33:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 12:33:15,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:33:21,506 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) .cse0) (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 7) .cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))))) is different from false [2023-02-15 12:33:47,573 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|))) (or (= (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) .cse0) (= (mod (+ (* 6 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 10 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) .cse0 (* 7 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)) 12) 0)))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2023-02-15 12:34:05,621 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|))) (or (= (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) .cse0) (= (mod (+ (* 6 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 10 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) .cse0 (* 7 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)) 12) 0)))) (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-02-15 12:34:30,477 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 7) .cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))))) is different from false [2023-02-15 12:34:32,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:34:32,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434781557] [2023-02-15 12:34:32,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:34:32,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668389810] [2023-02-15 12:34:32,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668389810] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:34:32,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 12:34:32,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-02-15 12:34:32,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935271805] [2023-02-15 12:34:32,509 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 12:34:32,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 12:34:32,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:34:32,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 12:34:32,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=106, Unknown=5, NotChecked=92, Total=240 [2023-02-15 12:34:32,511 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-15 12:34:32,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:34:32,596 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2023-02-15 12:34:32,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 12:34:32,596 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 36 [2023-02-15 12:34:32,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:34:32,597 INFO L225 Difference]: With dead ends: 38 [2023-02-15 12:34:32,597 INFO L226 Difference]: Without dead ends: 32 [2023-02-15 12:34:32,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=56, Invalid=165, Unknown=5, NotChecked=116, Total=342 [2023-02-15 12:34:32,598 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:34:32,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 92 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:34:32,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-15 12:34:32,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-15 12:34:32,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 12:34:32,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2023-02-15 12:34:32,603 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 36 [2023-02-15 12:34:32,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:34:32,604 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2023-02-15 12:34:32,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-15 12:34:32,604 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2023-02-15 12:34:32,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 12:34:32,606 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:34:32,606 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:34:32,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 12:34:32,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:34:32,807 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:34:32,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:34:32,807 INFO L85 PathProgramCache]: Analyzing trace with hash -426505545, now seen corresponding path program 2 times [2023-02-15 12:34:32,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:34:32,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77330868] [2023-02-15 12:34:32,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:34:32,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:34:32,815 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:34:32,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276421575] [2023-02-15 12:34:32,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:34:32,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:34:32,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:34:32,820 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:34:32,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 12:34:32,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:34:32,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:34:32,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 12:34:32,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:34:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 12:34:32,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:34:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 12:34:33,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:34:33,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77330868] [2023-02-15 12:34:33,145 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:34:33,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276421575] [2023-02-15 12:34:33,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276421575] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:34:33,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:34:33,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2023-02-15 12:34:33,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040139257] [2023-02-15 12:34:33,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:34:33,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 12:34:33,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:34:33,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 12:34:33,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2023-02-15 12:34:33,149 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 17 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2023-02-15 12:34:33,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:34:33,486 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2023-02-15 12:34:33,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 12:34:33,487 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) Word has length 43 [2023-02-15 12:34:33,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:34:33,487 INFO L225 Difference]: With dead ends: 51 [2023-02-15 12:34:33,487 INFO L226 Difference]: Without dead ends: 43 [2023-02-15 12:34:33,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2023-02-15 12:34:33,488 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 20 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:34:33,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 184 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:34:33,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-15 12:34:33,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2023-02-15 12:34:33,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 12:34:33,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2023-02-15 12:34:33,498 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 43 [2023-02-15 12:34:33,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:34:33,498 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2023-02-15 12:34:33,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2023-02-15 12:34:33,499 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2023-02-15 12:34:33,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-15 12:34:33,499 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:34:33,500 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:34:33,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 12:34:33,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:34:33,709 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:34:33,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:34:33,709 INFO L85 PathProgramCache]: Analyzing trace with hash 66449050, now seen corresponding path program 3 times [2023-02-15 12:34:33,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:34:33,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193145195] [2023-02-15 12:34:33,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:34:33,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:34:33,722 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:34:33,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [555339632] [2023-02-15 12:34:33,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 12:34:33,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:34:33,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:34:33,724 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:34:33,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 12:34:33,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-15 12:34:33,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:34:33,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-15 12:34:33,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:34:34,064 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 55 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-02-15 12:34:34,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:34:34,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:34:34,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193145195] [2023-02-15 12:34:34,200 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:34:34,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555339632] [2023-02-15 12:34:34,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555339632] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:34:34,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 12:34:34,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-02-15 12:34:34,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674811720] [2023-02-15 12:34:34,200 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 12:34:34,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 12:34:34,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:34:34,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 12:34:34,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-02-15 12:34:34,201 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-02-15 12:34:34,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:34:34,396 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2023-02-15 12:34:34,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 12:34:34,397 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 64 [2023-02-15 12:34:34,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:34:34,397 INFO L225 Difference]: With dead ends: 50 [2023-02-15 12:34:34,397 INFO L226 Difference]: Without dead ends: 44 [2023-02-15 12:34:34,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-02-15 12:34:34,398 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:34:34,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 205 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:34:34,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-15 12:34:34,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-02-15 12:34:34,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 12:34:34,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2023-02-15 12:34:34,411 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 64 [2023-02-15 12:34:34,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:34:34,412 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2023-02-15 12:34:34,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-02-15 12:34:34,412 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2023-02-15 12:34:34,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-15 12:34:34,417 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:34:34,420 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:34:34,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 12:34:34,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:34:34,630 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:34:34,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:34:34,630 INFO L85 PathProgramCache]: Analyzing trace with hash 357326839, now seen corresponding path program 4 times [2023-02-15 12:34:34,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:34:34,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287952170] [2023-02-15 12:34:34,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:34:34,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:34:34,638 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:34:34,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [985894367] [2023-02-15 12:34:34,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 12:34:34,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:34:34,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:34:34,639 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:34:34,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 12:34:34,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 12:34:34,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:34:34,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-15 12:34:34,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:34:34,900 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 66 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-02-15 12:34:34,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:34:35,235 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 63 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-02-15 12:34:35,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:34:35,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287952170] [2023-02-15 12:34:35,236 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:34:35,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985894367] [2023-02-15 12:34:35,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985894367] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:34:35,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:34:35,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2023-02-15 12:34:35,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627054250] [2023-02-15 12:34:35,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:34:35,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 12:34:35,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:34:35,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 12:34:35,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2023-02-15 12:34:35,239 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 25 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 18 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2023-02-15 12:34:36,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:34:36,295 INFO L93 Difference]: Finished difference Result 75 states and 97 transitions. [2023-02-15 12:34:36,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 12:34:36,296 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 18 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 71 [2023-02-15 12:34:36,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:34:36,297 INFO L225 Difference]: With dead ends: 75 [2023-02-15 12:34:36,297 INFO L226 Difference]: Without dead ends: 67 [2023-02-15 12:34:36,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=335, Invalid=1387, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 12:34:36,298 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 49 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 12:34:36,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 355 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 12:34:36,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-15 12:34:36,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2023-02-15 12:34:36,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-02-15 12:34:36,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2023-02-15 12:34:36,313 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 71 [2023-02-15 12:34:36,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:34:36,314 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2023-02-15 12:34:36,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 18 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2023-02-15 12:34:36,314 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2023-02-15 12:34:36,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-15 12:34:36,316 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:34:36,316 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 14, 14, 14, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:34:36,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 12:34:36,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:34:36,523 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:34:36,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:34:36,524 INFO L85 PathProgramCache]: Analyzing trace with hash 2004694042, now seen corresponding path program 5 times [2023-02-15 12:34:36,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:34:36,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067794749] [2023-02-15 12:34:36,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:34:36,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:34:36,544 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:34:36,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298206414] [2023-02-15 12:34:36,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 12:34:36,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:34:36,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:34:36,547 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:34:36,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process