./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd2-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/egcd2-ll.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 ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 01:21:16,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 01:21:16,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 01:21:16,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 01:21:16,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 01:21:16,613 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 01:21:16,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 01:21:16,616 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 01:21:16,618 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 01:21:16,621 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 01:21:16,622 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 01:21:16,623 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 01:21:16,624 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 01:21:16,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 01:21:16,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 01:21:16,627 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 01:21:16,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 01:21:16,630 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 01:21:16,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 01:21:16,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 01:21:16,635 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 01:21:16,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 01:21:16,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 01:21:16,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 01:21:16,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 01:21:16,643 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 01:21:16,643 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 01:21:16,644 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 01:21:16,645 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 01:21:16,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 01:21:16,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 01:21:16,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 01:21:16,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 01:21:16,647 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 01:21:16,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 01:21:16,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 01:21:16,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 01:21:16,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 01:21:16,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 01:21:16,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 01:21:16,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 01:21:16,652 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 01:21:16,673 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 01:21:16,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 01:21:16,674 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 01:21:16,674 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 01:21:16,675 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 01:21:16,675 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 01:21:16,676 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 01:21:16,676 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 01:21:16,676 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 01:21:16,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 01:21:16,677 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 01:21:16,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 01:21:16,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 01:21:16,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 01:21:16,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 01:21:16,677 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 01:21:16,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 01:21:16,678 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 01:21:16,678 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 01:21:16,678 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 01:21:16,678 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 01:21:16,678 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 01:21:16,678 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 01:21:16,679 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 01:21:16,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 01:21:16,679 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 01:21:16,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 01:21:16,679 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 01:21:16,679 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 01:21:16,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 01:21:16,680 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 01:21:16,680 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 01:21:16,680 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 01:21:16,680 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 01:21:16,680 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 01:21:16,680 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 [2023-02-17 01:21:16,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 01:21:16,894 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 01:21:16,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 01:21:16,901 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 01:21:16,901 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 01:21:16,902 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/egcd2-ll.c [2023-02-17 01:21:17,842 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 01:21:18,020 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 01:21:18,021 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd2-ll.c [2023-02-17 01:21:18,027 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/565e3a909/4eb3a9ab3fab43588ecad0b135eeb87e/FLAG838fb97f5 [2023-02-17 01:21:18,054 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/565e3a909/4eb3a9ab3fab43588ecad0b135eeb87e [2023-02-17 01:21:18,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 01:21:18,057 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 01:21:18,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 01:21:18,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 01:21:18,060 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 01:21:18,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 01:21:18" (1/1) ... [2023-02-17 01:21:18,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39590648 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:21:18, skipping insertion in model container [2023-02-17 01:21:18,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 01:21:18" (1/1) ... [2023-02-17 01:21:18,065 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 01:21:18,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 01:21:18,193 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/egcd2-ll.c[490,503] [2023-02-17 01:21:18,222 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 01:21:18,231 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 01:21:18,241 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/egcd2-ll.c[490,503] [2023-02-17 01:21:18,259 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 01:21:18,271 INFO L208 MainTranslator]: Completed translation [2023-02-17 01:21:18,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:21:18 WrapperNode [2023-02-17 01:21:18,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 01:21:18,272 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 01:21:18,273 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 01:21:18,273 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 01:21:18,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:21:18" (1/1) ... [2023-02-17 01:21:18,288 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:21:18" (1/1) ... [2023-02-17 01:21:18,305 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 75 [2023-02-17 01:21:18,306 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 01:21:18,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 01:21:18,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 01:21:18,307 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 01:21:18,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:21:18" (1/1) ... [2023-02-17 01:21:18,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:21:18" (1/1) ... [2023-02-17 01:21:18,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:21:18" (1/1) ... [2023-02-17 01:21:18,316 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:21:18" (1/1) ... [2023-02-17 01:21:18,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:21:18" (1/1) ... [2023-02-17 01:21:18,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:21:18" (1/1) ... [2023-02-17 01:21:18,332 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:21:18" (1/1) ... [2023-02-17 01:21:18,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:21:18" (1/1) ... [2023-02-17 01:21:18,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 01:21:18,335 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 01:21:18,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 01:21:18,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 01:21:18,336 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:21:18" (1/1) ... [2023-02-17 01:21:18,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 01:21:18,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:21:18,360 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-17 01:21:18,379 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 [2023-02-17 01:21:18,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 01:21:18,389 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-17 01:21:18,390 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-17 01:21:18,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 01:21:18,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 01:21:18,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 01:21:18,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-17 01:21:18,390 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-17 01:21:18,438 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 01:21:18,440 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 01:21:18,571 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 01:21:18,575 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 01:21:18,575 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-17 01:21:18,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 01:21:18 BoogieIcfgContainer [2023-02-17 01:21:18,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 01:21:18,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 01:21:18,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 01:21:18,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 01:21:18,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 01:21:18" (1/3) ... [2023-02-17 01:21:18,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6761618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 01:21:18, skipping insertion in model container [2023-02-17 01:21:18,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:21:18" (2/3) ... [2023-02-17 01:21:18,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6761618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 01:21:18, skipping insertion in model container [2023-02-17 01:21:18,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 01:21:18" (3/3) ... [2023-02-17 01:21:18,582 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll.c [2023-02-17 01:21:18,593 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 01:21:18,594 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 01:21:18,623 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 01:21:18,627 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;@636a396f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 01:21:18,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 01:21:18,630 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-17 01:21:18,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-17 01:21:18,635 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:21:18,636 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:21:18,636 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:21:18,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:21:18,640 INFO L85 PathProgramCache]: Analyzing trace with hash 223354930, now seen corresponding path program 1 times [2023-02-17 01:21:18,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:21:18,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925669806] [2023-02-17 01:21:18,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:21:18,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:21:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:21:18,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:21:18,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925669806] [2023-02-17 01:21:18,738 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-17 01:21:18,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266484672] [2023-02-17 01:21:18,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:21:18,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:21:18,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:21:18,741 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:21:18,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 01:21:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:21:18,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-17 01:21:18,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:21:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 01:21:18,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 01:21:18,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266484672] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 01:21:18,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 01:21:18,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 01:21:18,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395238988] [2023-02-17 01:21:18,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:21:18,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 01:21:18,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:21:18,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 01:21:18,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 01:21:18,845 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 01:21:18,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:21:18,860 INFO L93 Difference]: Finished difference Result 61 states and 100 transitions. [2023-02-17 01:21:18,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 01:21:18,862 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-02-17 01:21:18,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:21:18,866 INFO L225 Difference]: With dead ends: 61 [2023-02-17 01:21:18,866 INFO L226 Difference]: Without dead ends: 28 [2023-02-17 01:21:18,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 01:21:18,871 INFO L413 NwaCegarLoop]: 41 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, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 01:21:18,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 01:21:18,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-17 01:21:18,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-17 01:21:18,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 01:21:18,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-02-17 01:21:18,895 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 28 [2023-02-17 01:21:18,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:21:18,895 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-02-17 01:21:18,896 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 01:21:18,896 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-02-17 01:21:18,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-17 01:21:18,897 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:21:18,897 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:21:18,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 01:21:19,102 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 [2023-02-17 01:21:19,102 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:21:19,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:21:19,103 INFO L85 PathProgramCache]: Analyzing trace with hash 727709964, now seen corresponding path program 1 times [2023-02-17 01:21:19,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:21:19,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074566796] [2023-02-17 01:21:19,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:21:19,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:21:19,132 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:21:19,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926135664] [2023-02-17 01:21:19,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:21:19,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:21:19,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:21:19,145 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:21:19,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 01:21:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:21:19,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 01:21:19,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:21:19,251 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 01:21:19,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:21:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 01:21:19,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:21:19,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074566796] [2023-02-17 01:21:19,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:21:19,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926135664] [2023-02-17 01:21:19,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926135664] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:21:19,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:21:19,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2023-02-17 01:21:19,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637197072] [2023-02-17 01:21:19,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:21:19,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 01:21:19,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:21:19,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 01:21:19,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-17 01:21:19,291 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 01:21:19,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:21:19,390 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2023-02-17 01:21:19,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 01:21:19,391 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-02-17 01:21:19,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:21:19,393 INFO L225 Difference]: With dead ends: 45 [2023-02-17 01:21:19,394 INFO L226 Difference]: Without dead ends: 37 [2023-02-17 01:21:19,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-02-17 01:21:19,396 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 01:21:19,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 99 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 01:21:19,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-17 01:21:19,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2023-02-17 01:21:19,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 01:21:19,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-02-17 01:21:19,409 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 29 [2023-02-17 01:21:19,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:21:19,409 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-02-17 01:21:19,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 01:21:19,410 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-02-17 01:21:19,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-17 01:21:19,411 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:21:19,411 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:21:19,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 01:21:19,629 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 [2023-02-17 01:21:19,630 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:21:19,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:21:19,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1088429638, now seen corresponding path program 1 times [2023-02-17 01:21:19,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:21:19,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714224837] [2023-02-17 01:21:19,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:21:19,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:21:19,649 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:21:19,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653022794] [2023-02-17 01:21:19,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:21:19,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:21:19,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:21:19,671 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:21:19,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 01:21:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:21:19,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 01:21:19,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:21:19,767 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 01:21:19,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:21:19,790 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-17 01:21:19,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:21:19,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714224837] [2023-02-17 01:21:19,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:21:19,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653022794] [2023-02-17 01:21:19,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653022794] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 01:21:19,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:21:19,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-02-17 01:21:19,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965937878] [2023-02-17 01:21:19,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:21:19,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 01:21:19,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:21:19,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 01:21:19,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-17 01:21:19,792 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 01:21:19,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:21:19,826 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2023-02-17 01:21:19,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 01:21:19,826 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2023-02-17 01:21:19,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:21:19,827 INFO L225 Difference]: With dead ends: 36 [2023-02-17 01:21:19,827 INFO L226 Difference]: Without dead ends: 34 [2023-02-17 01:21:19,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-17 01:21:19,828 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 01:21:19,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 100 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 01:21:19,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-17 01:21:19,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-02-17 01:21:19,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 01:21:19,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-02-17 01:21:19,834 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 30 [2023-02-17 01:21:19,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:21:19,834 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-02-17 01:21:19,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 01:21:19,835 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-02-17 01:21:19,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-17 01:21:19,835 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:21:19,836 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:21:19,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 01:21:20,040 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 [2023-02-17 01:21:20,040 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:21:20,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:21:20,041 INFO L85 PathProgramCache]: Analyzing trace with hash 161014808, now seen corresponding path program 1 times [2023-02-17 01:21:20,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:21:20,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845848876] [2023-02-17 01:21:20,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:21:20,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:21:20,055 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:21:20,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [259588228] [2023-02-17 01:21:20,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:21:20,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:21:20,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:21:20,061 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:21:20,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 01:21:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:21:20,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-17 01:21:20,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:21:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 01:21:20,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:21:20,176 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-17 01:21:20,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:21:20,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845848876] [2023-02-17 01:21:20,177 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:21:20,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259588228] [2023-02-17 01:21:20,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259588228] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 01:21:20,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:21:20,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-02-17 01:21:20,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317040714] [2023-02-17 01:21:20,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:21:20,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 01:21:20,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:21:20,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 01:21:20,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-17 01:21:20,179 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-17 01:21:20,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:21:20,266 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2023-02-17 01:21:20,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 01:21:20,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2023-02-17 01:21:20,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:21:20,267 INFO L225 Difference]: With dead ends: 47 [2023-02-17 01:21:20,267 INFO L226 Difference]: Without dead ends: 45 [2023-02-17 01:21:20,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-17 01:21:20,268 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 01:21:20,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 124 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 01:21:20,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-02-17 01:21:20,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2023-02-17 01:21:20,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-17 01:21:20,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2023-02-17 01:21:20,276 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 35 [2023-02-17 01:21:20,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:21:20,277 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2023-02-17 01:21:20,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-17 01:21:20,277 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2023-02-17 01:21:20,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-17 01:21:20,278 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:21:20,278 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:21:20,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 01:21:20,482 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 [2023-02-17 01:21:20,483 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:21:20,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:21:20,483 INFO L85 PathProgramCache]: Analyzing trace with hash -2062939834, now seen corresponding path program 1 times [2023-02-17 01:21:20,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:21:20,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6818322] [2023-02-17 01:21:20,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:21:20,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:21:20,506 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:21:20,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180184199] [2023-02-17 01:21:20,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:21:20,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:21:20,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:21:20,508 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:21:20,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 01:21:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:21:20,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-17 01:21:20,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:21:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 01:21:20,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:21:20,677 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-17 01:21:20,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:21:20,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6818322] [2023-02-17 01:21:20,678 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:21:20,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180184199] [2023-02-17 01:21:20,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180184199] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 01:21:20,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:21:20,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 14 [2023-02-17 01:21:20,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482134229] [2023-02-17 01:21:20,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:21:20,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 01:21:20,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:21:20,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 01:21:20,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-02-17 01:21:20,681 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-17 01:21:20,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:21:20,720 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2023-02-17 01:21:20,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 01:21:20,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2023-02-17 01:21:20,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:21:20,723 INFO L225 Difference]: With dead ends: 51 [2023-02-17 01:21:20,723 INFO L226 Difference]: Without dead ends: 49 [2023-02-17 01:21:20,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-02-17 01:21:20,725 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 01:21:20,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 115 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 01:21:20,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-17 01:21:20,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2023-02-17 01:21:20,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-17 01:21:20,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2023-02-17 01:21:20,741 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 40 [2023-02-17 01:21:20,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:21:20,742 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2023-02-17 01:21:20,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-17 01:21:20,743 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2023-02-17 01:21:20,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-17 01:21:20,743 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:21:20,743 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:21:20,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-17 01:21:20,948 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 [2023-02-17 01:21:20,948 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:21:20,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:21:20,953 INFO L85 PathProgramCache]: Analyzing trace with hash -98301800, now seen corresponding path program 1 times [2023-02-17 01:21:20,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:21:20,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089223681] [2023-02-17 01:21:20,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:21:20,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:21:20,960 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:21:20,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [107098443] [2023-02-17 01:21:20,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:21:20,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:21:20,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:21:20,986 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:21:20,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 01:21:21,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:21:21,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 01:21:21,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:21:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-17 01:21:21,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:21:21,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:21:21,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089223681] [2023-02-17 01:21:21,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:21:21,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107098443] [2023-02-17 01:21:21,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107098443] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:21:21,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:21:21,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-02-17 01:21:21,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959717951] [2023-02-17 01:21:21,134 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 01:21:21,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 01:21:21,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:21:21,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 01:21:21,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-17 01:21:21,135 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-17 01:21:21,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:21:21,224 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2023-02-17 01:21:21,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 01:21:21,225 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2023-02-17 01:21:21,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:21:21,226 INFO L225 Difference]: With dead ends: 55 [2023-02-17 01:21:21,226 INFO L226 Difference]: Without dead ends: 53 [2023-02-17 01:21:21,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-17 01:21:21,227 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 12 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 01:21:21,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 95 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 01:21:21,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-17 01:21:21,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2023-02-17 01:21:21,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-17 01:21:21,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2023-02-17 01:21:21,243 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 45 [2023-02-17 01:21:21,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:21:21,244 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2023-02-17 01:21:21,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-17 01:21:21,244 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2023-02-17 01:21:21,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-17 01:21:21,250 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:21:21,250 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:21:21,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-17 01:21:21,455 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 [2023-02-17 01:21:21,455 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:21:21,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:21:21,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1721617041, now seen corresponding path program 1 times [2023-02-17 01:21:21,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:21:21,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877775767] [2023-02-17 01:21:21,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:21:21,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:21:21,467 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:21:21,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1415795826] [2023-02-17 01:21:21,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:21:21,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:21:21,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:21:21,480 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:21:21,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 01:21:21,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:21:21,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 01:21:21,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:21:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-17 01:21:21,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:21:21,589 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-17 01:21:21,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:21:21,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877775767] [2023-02-17 01:21:21,590 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:21:21,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415795826] [2023-02-17 01:21:21,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415795826] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:21:21,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:21:21,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-17 01:21:21,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310557320] [2023-02-17 01:21:21,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:21:21,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 01:21:21,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:21:21,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 01:21:21,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-17 01:21:21,592 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-17 01:21:21,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:21:21,731 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2023-02-17 01:21:21,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 01:21:21,732 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2023-02-17 01:21:21,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:21:21,733 INFO L225 Difference]: With dead ends: 99 [2023-02-17 01:21:21,733 INFO L226 Difference]: Without dead ends: 91 [2023-02-17 01:21:21,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-17 01:21:21,733 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 36 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 01:21:21,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 180 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 01:21:21,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-17 01:21:21,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2023-02-17 01:21:21,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 30 states have call successors, (30), 6 states have call predecessors, (30), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2023-02-17 01:21:21,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 113 transitions. [2023-02-17 01:21:21,745 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 113 transitions. Word has length 54 [2023-02-17 01:21:21,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:21:21,745 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 113 transitions. [2023-02-17 01:21:21,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-17 01:21:21,745 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 113 transitions. [2023-02-17 01:21:21,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-17 01:21:21,746 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:21:21,746 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:21:21,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-17 01:21:21,950 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 [2023-02-17 01:21:21,951 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:21:21,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:21:21,951 INFO L85 PathProgramCache]: Analyzing trace with hash -653850053, now seen corresponding path program 1 times [2023-02-17 01:21:21,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:21:21,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297773919] [2023-02-17 01:21:21,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:21:21,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:21:21,959 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:21:21,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907357659] [2023-02-17 01:21:21,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:21:21,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:21:21,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:21:21,960 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:21:21,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 01:21:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:21:22,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-17 01:21:22,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:21:22,064 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-02-17 01:21:22,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:21:22,107 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-17 01:21:22,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:21:22,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297773919] [2023-02-17 01:21:22,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:21:22,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907357659] [2023-02-17 01:21:22,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907357659] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:21:22,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:21:22,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2023-02-17 01:21:22,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189282296] [2023-02-17 01:21:22,109 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:21:22,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 01:21:22,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:21:22,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 01:21:22,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-02-17 01:21:22,110 INFO L87 Difference]: Start difference. First operand 82 states and 113 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-02-17 01:21:22,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:21:22,383 INFO L93 Difference]: Finished difference Result 125 states and 178 transitions. [2023-02-17 01:21:22,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 01:21:22,384 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 60 [2023-02-17 01:21:22,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:21:22,386 INFO L225 Difference]: With dead ends: 125 [2023-02-17 01:21:22,386 INFO L226 Difference]: Without dead ends: 121 [2023-02-17 01:21:22,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-02-17 01:21:22,387 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 32 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 01:21:22,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 199 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 01:21:22,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-02-17 01:21:22,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2023-02-17 01:21:22,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 49 states have (on average 1.183673469387755) internal successors, (58), 51 states have internal predecessors, (58), 32 states have call successors, (32), 7 states have call predecessors, (32), 7 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2023-02-17 01:21:22,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 121 transitions. [2023-02-17 01:21:22,411 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 121 transitions. Word has length 60 [2023-02-17 01:21:22,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:21:22,411 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 121 transitions. [2023-02-17 01:21:22,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-02-17 01:21:22,411 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 121 transitions. [2023-02-17 01:21:22,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-17 01:21:22,413 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:21:22,413 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:21:22,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-17 01:21:22,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-17 01:21:22,618 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:21:22,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:21:22,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1044201731, now seen corresponding path program 2 times [2023-02-17 01:21:22,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:21:22,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102134922] [2023-02-17 01:21:22,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:21:22,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:21:22,628 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:21:22,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [376811956] [2023-02-17 01:21:22,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 01:21:22,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:21:22,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:21:22,630 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:21:22,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 01:21:22,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 01:21:22,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:21:22,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-17 01:21:22,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:21:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-17 01:21:23,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:21:25,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:21:25,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102134922] [2023-02-17 01:21:25,282 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:21:25,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376811956] [2023-02-17 01:21:25,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376811956] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:21:25,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:21:25,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-17 01:21:25,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410111318] [2023-02-17 01:21:25,283 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 01:21:25,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 01:21:25,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:21:25,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 01:21:25,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=317, Unknown=1, NotChecked=0, Total=380 [2023-02-17 01:21:25,284 INFO L87 Difference]: Start difference. First operand 89 states and 121 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-02-17 01:21:27,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 01:21:29,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 01:21:30,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 01:21:31,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:21:31,524 INFO L93 Difference]: Finished difference Result 121 states and 160 transitions. [2023-02-17 01:21:31,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 01:21:31,524 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 65 [2023-02-17 01:21:31,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:21:31,525 INFO L225 Difference]: With dead ends: 121 [2023-02-17 01:21:31,525 INFO L226 Difference]: Without dead ends: 119 [2023-02-17 01:21:31,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=101, Invalid=498, Unknown=1, NotChecked=0, Total=600 [2023-02-17 01:21:31,526 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 38 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 17 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-02-17 01:21:31,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 112 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 389 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time] [2023-02-17 01:21:31,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-17 01:21:31,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2023-02-17 01:21:31,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 67 states have internal predecessors, (76), 40 states have call successors, (40), 10 states have call predecessors, (40), 10 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2023-02-17 01:21:31,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 155 transitions. [2023-02-17 01:21:31,542 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 155 transitions. Word has length 65 [2023-02-17 01:21:31,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:21:31,543 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 155 transitions. [2023-02-17 01:21:31,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-02-17 01:21:31,543 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 155 transitions. [2023-02-17 01:21:31,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-17 01:21:31,544 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:21:31,544 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:21:31,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-17 01:21:31,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:21:31,750 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:21:31,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:21:31,750 INFO L85 PathProgramCache]: Analyzing trace with hash 635379451, now seen corresponding path program 3 times [2023-02-17 01:21:31,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:21:31,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565232638] [2023-02-17 01:21:31,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:21:31,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:21:31,777 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:21:31,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013179618] [2023-02-17 01:21:31,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 01:21:31,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:21:31,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:21:31,781 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:21:31,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 01:21:31,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-17 01:21:31,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:21:31,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-17 01:21:31,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:21:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 40 proven. 8 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-02-17 01:21:31,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:21:32,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:21:32,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565232638] [2023-02-17 01:21:32,095 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:21:32,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013179618] [2023-02-17 01:21:32,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013179618] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:21:32,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:21:32,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-02-17 01:21:32,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809481510] [2023-02-17 01:21:32,097 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 01:21:32,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 01:21:32,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:21:32,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 01:21:32,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-17 01:21:32,099 INFO L87 Difference]: Start difference. First operand 116 states and 155 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-02-17 01:21:33,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:21:33,102 INFO L93 Difference]: Finished difference Result 125 states and 163 transitions. [2023-02-17 01:21:33,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 01:21:33,102 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 70 [2023-02-17 01:21:33,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:21:33,103 INFO L225 Difference]: With dead ends: 125 [2023-02-17 01:21:33,103 INFO L226 Difference]: Without dead ends: 123 [2023-02-17 01:21:33,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-02-17 01:21:33,104 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 26 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-17 01:21:33,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 136 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-17 01:21:33,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-02-17 01:21:33,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2023-02-17 01:21:33,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 68 states have (on average 1.161764705882353) internal successors, (79), 70 states have internal predecessors, (79), 40 states have call successors, (40), 11 states have call predecessors, (40), 11 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2023-02-17 01:21:33,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 158 transitions. [2023-02-17 01:21:33,120 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 158 transitions. Word has length 70 [2023-02-17 01:21:33,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:21:33,122 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 158 transitions. [2023-02-17 01:21:33,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-02-17 01:21:33,123 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 158 transitions. [2023-02-17 01:21:33,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-17 01:21:33,123 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:21:33,123 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:21:33,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-17 01:21:33,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-17 01:21:33,328 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:21:33,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:21:33,329 INFO L85 PathProgramCache]: Analyzing trace with hash -375209714, now seen corresponding path program 1 times [2023-02-17 01:21:33,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:21:33,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607082737] [2023-02-17 01:21:33,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:21:33,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:21:33,344 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:21:33,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [908599641] [2023-02-17 01:21:33,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:21:33,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:21:33,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:21:33,348 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:21:33,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 01:21:33,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:21:33,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-17 01:21:33,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:21:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-02-17 01:21:33,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:21:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-02-17 01:21:34,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:21:34,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607082737] [2023-02-17 01:21:34,003 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:21:34,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908599641] [2023-02-17 01:21:34,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908599641] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:21:34,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:21:34,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-02-17 01:21:34,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636863235] [2023-02-17 01:21:34,004 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:21:34,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 01:21:34,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:21:34,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 01:21:34,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-02-17 01:21:34,005 INFO L87 Difference]: Start difference. First operand 120 states and 158 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-02-17 01:21:42,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:21:42,047 INFO L93 Difference]: Finished difference Result 205 states and 290 transitions. [2023-02-17 01:21:42,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-17 01:21:42,047 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 76 [2023-02-17 01:21:42,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:21:42,049 INFO L225 Difference]: With dead ends: 205 [2023-02-17 01:21:42,049 INFO L226 Difference]: Without dead ends: 201 [2023-02-17 01:21:42,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2023-02-17 01:21:42,052 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 93 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-02-17 01:21:42,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 410 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2023-02-17 01:21:42,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-02-17 01:21:42,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 197. [2023-02-17 01:21:42,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 105 states have (on average 1.2) internal successors, (126), 106 states have internal predecessors, (126), 77 states have call successors, (77), 14 states have call predecessors, (77), 14 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2023-02-17 01:21:42,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 279 transitions. [2023-02-17 01:21:42,107 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 279 transitions. Word has length 76 [2023-02-17 01:21:42,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:21:42,108 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 279 transitions. [2023-02-17 01:21:42,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-02-17 01:21:42,108 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 279 transitions. [2023-02-17 01:21:42,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-02-17 01:21:42,109 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:21:42,110 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:21:42,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-17 01:21:42,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-17 01:21:42,315 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:21:42,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:21:42,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1119373286, now seen corresponding path program 4 times [2023-02-17 01:21:42,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:21:42,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562018731] [2023-02-17 01:21:42,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:21:42,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:21:42,329 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:21:42,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [439643736] [2023-02-17 01:21:42,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 01:21:42,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:21:42,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:21:42,332 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:21:42,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-17 01:21:42,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 01:21:42,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:21:42,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 01:21:42,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:21:42,395 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-02-17 01:21:42,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 01:21:42,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:21:42,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562018731] [2023-02-17 01:21:42,396 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:21:42,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439643736] [2023-02-17 01:21:42,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439643736] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 01:21:42,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 01:21:42,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 01:21:42,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166653769] [2023-02-17 01:21:42,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:21:42,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 01:21:42,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:21:42,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 01:21:42,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 01:21:42,397 INFO L87 Difference]: Start difference. First operand 197 states and 279 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-02-17 01:21:42,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:21:42,468 INFO L93 Difference]: Finished difference Result 250 states and 351 transitions. [2023-02-17 01:21:42,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 01:21:42,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 90 [2023-02-17 01:21:42,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:21:42,470 INFO L225 Difference]: With dead ends: 250 [2023-02-17 01:21:42,470 INFO L226 Difference]: Without dead ends: 178 [2023-02-17 01:21:42,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-17 01:21:42,473 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 01:21:42,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 125 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 01:21:42,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-02-17 01:21:42,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 164. [2023-02-17 01:21:42,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 89 states have internal predecessors, (101), 61 states have call successors, (61), 14 states have call predecessors, (61), 14 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-02-17 01:21:42,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 222 transitions. [2023-02-17 01:21:42,510 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 222 transitions. Word has length 90 [2023-02-17 01:21:42,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:21:42,511 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 222 transitions. [2023-02-17 01:21:42,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-02-17 01:21:42,511 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 222 transitions. [2023-02-17 01:21:42,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-17 01:21:42,512 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:21:42,512 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:21:42,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-17 01:21:42,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-17 01:21:42,717 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:21:42,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:21:42,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1261079706, now seen corresponding path program 1 times [2023-02-17 01:21:42,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:21:42,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232653633] [2023-02-17 01:21:42,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:21:42,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:21:42,724 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:21:42,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703075530] [2023-02-17 01:21:42,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:21:42,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:21:42,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:21:42,726 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:21:42,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-17 01:21:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:21:42,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-17 01:21:42,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:21:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 51 proven. 28 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2023-02-17 01:21:42,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:21:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2023-02-17 01:21:43,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:21:43,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232653633] [2023-02-17 01:21:43,585 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:21:43,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703075530] [2023-02-17 01:21:43,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703075530] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:21:43,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:21:43,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2023-02-17 01:21:43,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614617256] [2023-02-17 01:21:43,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:21:43,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-17 01:21:43,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:21:43,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-17 01:21:43,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-02-17 01:21:43,588 INFO L87 Difference]: Start difference. First operand 164 states and 222 transitions. Second operand has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-17 01:21:49,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:21:58,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:22:01,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:22:03,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:22:12,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:22:12,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:22:12,727 INFO L93 Difference]: Finished difference Result 206 states and 282 transitions. [2023-02-17 01:22:12,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-17 01:22:12,727 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) Word has length 92 [2023-02-17 01:22:12,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:22:12,729 INFO L225 Difference]: With dead ends: 206 [2023-02-17 01:22:12,729 INFO L226 Difference]: Without dead ends: 204 [2023-02-17 01:22:12,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=334, Invalid=1226, Unknown=0, NotChecked=0, Total=1560 [2023-02-17 01:22:12,730 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 91 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 110 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.6s IncrementalHoareTripleChecker+Time [2023-02-17 01:22:12,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 177 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1095 Invalid, 5 Unknown, 0 Unchecked, 20.6s Time] [2023-02-17 01:22:12,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-02-17 01:22:12,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 194. [2023-02-17 01:22:12,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 105 states have (on average 1.1428571428571428) internal successors, (120), 107 states have internal predecessors, (120), 73 states have call successors, (73), 15 states have call predecessors, (73), 15 states have return successors, (72), 71 states have call predecessors, (72), 72 states have call successors, (72) [2023-02-17 01:22:12,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 265 transitions. [2023-02-17 01:22:12,787 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 265 transitions. Word has length 92 [2023-02-17 01:22:12,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:22:12,788 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 265 transitions. [2023-02-17 01:22:12,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-17 01:22:12,788 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 265 transitions. [2023-02-17 01:22:12,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-02-17 01:22:12,789 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:22:12,789 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:22:12,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-17 01:22:12,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-17 01:22:12,995 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:22:12,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:22:12,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1880436805, now seen corresponding path program 2 times [2023-02-17 01:22:12,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:22:12,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489144406] [2023-02-17 01:22:12,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:22:12,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:22:13,012 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:22:13,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050106651] [2023-02-17 01:22:13,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 01:22:13,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:22:13,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:22:13,025 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:22:13,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-17 01:22:13,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 01:22:13,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:22:13,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-17 01:22:13,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:22:13,185 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-02-17 01:22:13,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:22:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-02-17 01:22:13,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:22:13,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489144406] [2023-02-17 01:22:13,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:22:13,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050106651] [2023-02-17 01:22:13,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050106651] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:22:13,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:22:13,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-02-17 01:22:13,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508797117] [2023-02-17 01:22:13,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:22:13,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 01:22:13,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:22:13,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 01:22:13,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-02-17 01:22:13,616 INFO L87 Difference]: Start difference. First operand 194 states and 265 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) [2023-02-17 01:22:26,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:22:26,329 INFO L93 Difference]: Finished difference Result 300 states and 427 transitions. [2023-02-17 01:22:26,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-17 01:22:26,330 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) Word has length 109 [2023-02-17 01:22:26,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:22:26,332 INFO L225 Difference]: With dead ends: 300 [2023-02-17 01:22:26,332 INFO L226 Difference]: Without dead ends: 298 [2023-02-17 01:22:26,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=417, Invalid=1745, Unknown=0, NotChecked=0, Total=2162 [2023-02-17 01:22:26,333 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 88 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2023-02-17 01:22:26,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 469 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2023-02-17 01:22:26,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-02-17 01:22:26,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 263. [2023-02-17 01:22:26,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 139 states have (on average 1.1654676258992807) internal successors, (162), 141 states have internal predecessors, (162), 105 states have call successors, (105), 18 states have call predecessors, (105), 18 states have return successors, (104), 103 states have call predecessors, (104), 104 states have call successors, (104) [2023-02-17 01:22:26,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 371 transitions. [2023-02-17 01:22:26,458 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 371 transitions. Word has length 109 [2023-02-17 01:22:26,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:22:26,459 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 371 transitions. [2023-02-17 01:22:26,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) [2023-02-17 01:22:26,459 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 371 transitions. [2023-02-17 01:22:26,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-02-17 01:22:26,460 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:22:26,460 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:22:26,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-17 01:22:26,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:22:26,666 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:22:26,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:22:26,666 INFO L85 PathProgramCache]: Analyzing trace with hash 468383399, now seen corresponding path program 3 times [2023-02-17 01:22:26,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:22:26,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105994425] [2023-02-17 01:22:26,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:22:26,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:22:26,679 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:22:26,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771159493] [2023-02-17 01:22:26,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 01:22:26,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:22:26,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:22:26,684 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:22:26,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-17 01:22:26,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-17 01:22:26,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:22:26,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-17 01:22:26,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:22:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 37 proven. 37 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-02-17 01:22:26,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:22:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-02-17 01:22:27,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:22:27,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105994425] [2023-02-17 01:22:27,590 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:22:27,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771159493] [2023-02-17 01:22:27,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771159493] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:22:27,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:22:27,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2023-02-17 01:22:27,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892897735] [2023-02-17 01:22:27,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:22:27,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-17 01:22:27,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:22:27,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-17 01:22:27,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2023-02-17 01:22:27,592 INFO L87 Difference]: Start difference. First operand 263 states and 371 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 23 states have internal predecessors, (49), 12 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2023-02-17 01:22:38,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:22:38,200 INFO L93 Difference]: Finished difference Result 397 states and 572 transitions. [2023-02-17 01:22:38,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-17 01:22:38,201 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 23 states have internal predecessors, (49), 12 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) Word has length 112 [2023-02-17 01:22:38,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:22:38,207 INFO L225 Difference]: With dead ends: 397 [2023-02-17 01:22:38,207 INFO L226 Difference]: Without dead ends: 395 [2023-02-17 01:22:38,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=418, Invalid=1744, Unknown=0, NotChecked=0, Total=2162 [2023-02-17 01:22:38,209 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 103 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2023-02-17 01:22:38,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 345 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2023-02-17 01:22:38,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2023-02-17 01:22:38,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 369. [2023-02-17 01:22:38,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 192 states have (on average 1.171875) internal successors, (225), 195 states have internal predecessors, (225), 153 states have call successors, (153), 23 states have call predecessors, (153), 23 states have return successors, (152), 150 states have call predecessors, (152), 152 states have call successors, (152) [2023-02-17 01:22:38,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 530 transitions. [2023-02-17 01:22:38,423 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 530 transitions. Word has length 112 [2023-02-17 01:22:38,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:22:38,423 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 530 transitions. [2023-02-17 01:22:38,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 23 states have internal predecessors, (49), 12 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2023-02-17 01:22:38,424 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 530 transitions. [2023-02-17 01:22:38,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-17 01:22:38,425 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:22:38,425 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:22:38,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-17 01:22:38,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-17 01:22:38,630 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:22:38,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:22:38,631 INFO L85 PathProgramCache]: Analyzing trace with hash 898620650, now seen corresponding path program 2 times [2023-02-17 01:22:38,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:22:38,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388518048] [2023-02-17 01:22:38,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:22:38,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:22:38,646 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:22:38,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731049133] [2023-02-17 01:22:38,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 01:22:38,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:22:38,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:22:38,649 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:22:38,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-17 01:22:38,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 01:22:38,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:22:38,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 76 conjunts are in the unsatisfiable core [2023-02-17 01:22:38,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:22:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 117 proven. 51 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2023-02-17 01:22:38,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:22:39,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:22:39,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388518048] [2023-02-17 01:22:39,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:22:39,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731049133] [2023-02-17 01:22:39,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731049133] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:22:39,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:22:39,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-17 01:22:39,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805779696] [2023-02-17 01:22:39,791 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 01:22:39,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-17 01:22:39,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:22:39,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-17 01:22:39,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2023-02-17 01:22:39,792 INFO L87 Difference]: Start difference. First operand 369 states and 530 transitions. Second operand has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-17 01:22:41,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:22:41,140 INFO L93 Difference]: Finished difference Result 408 states and 574 transitions. [2023-02-17 01:22:41,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-17 01:22:41,141 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) Word has length 123 [2023-02-17 01:22:41,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:22:41,144 INFO L225 Difference]: With dead ends: 408 [2023-02-17 01:22:41,144 INFO L226 Difference]: Without dead ends: 401 [2023-02-17 01:22:41,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2023-02-17 01:22:41,145 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 53 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-17 01:22:41,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 242 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-17 01:22:41,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2023-02-17 01:22:41,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 397. [2023-02-17 01:22:41,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 208 states have (on average 1.1634615384615385) internal successors, (242), 211 states have internal predecessors, (242), 161 states have call successors, (161), 27 states have call predecessors, (161), 27 states have return successors, (160), 158 states have call predecessors, (160), 160 states have call successors, (160) [2023-02-17 01:22:41,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 563 transitions. [2023-02-17 01:22:41,352 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 563 transitions. Word has length 123 [2023-02-17 01:22:41,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:22:41,352 INFO L495 AbstractCegarLoop]: Abstraction has 397 states and 563 transitions. [2023-02-17 01:22:41,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-17 01:22:41,353 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 563 transitions. [2023-02-17 01:22:41,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-02-17 01:22:41,356 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:22:41,356 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:22:41,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-17 01:22:41,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-17 01:22:41,561 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:22:41,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:22:41,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1501327478, now seen corresponding path program 4 times [2023-02-17 01:22:41,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:22:41,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942767327] [2023-02-17 01:22:41,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:22:41,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:22:41,568 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:22:41,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427431787] [2023-02-17 01:22:41,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 01:22:41,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:22:41,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:22:41,570 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:22:41,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-17 01:22:41,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 01:22:41,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:22:41,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-17 01:22:41,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:22:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 91 proven. 73 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2023-02-17 01:22:41,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:22:46,575 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 91 proven. 64 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2023-02-17 01:22:46,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:22:46,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942767327] [2023-02-17 01:22:46,576 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:22:46,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427431787] [2023-02-17 01:22:46,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427431787] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:22:46,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:22:46,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 30 [2023-02-17 01:22:46,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154095729] [2023-02-17 01:22:46,576 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:22:46,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-17 01:22:46,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:22:46,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-17 01:22:46,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=705, Unknown=1, NotChecked=0, Total=870 [2023-02-17 01:22:46,578 INFO L87 Difference]: Start difference. First operand 397 states and 563 transitions. Second operand has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 27 states have internal predecessors, (57), 15 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (46), 15 states have call predecessors, (46), 14 states have call successors, (46) [2023-02-17 01:22:54,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:22:56,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:22:59,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:23:01,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:23:02,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:23:05,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:23:06,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:23:08,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:23:10,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:23:13,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:23:16,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:23:17,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:23:19,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:23:31,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:23:32,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:23:34,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:23:36,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:23:49,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:23:51,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:23:58,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:24:00,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:24:03,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:24:12,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:24:14,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:24:15,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:24:15,196 INFO L93 Difference]: Finished difference Result 479 states and 686 transitions. [2023-02-17 01:24:15,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-17 01:24:15,196 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 27 states have internal predecessors, (57), 15 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (46), 15 states have call predecessors, (46), 14 states have call successors, (46) Word has length 139 [2023-02-17 01:24:15,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:24:15,199 INFO L225 Difference]: With dead ends: 479 [2023-02-17 01:24:15,199 INFO L226 Difference]: Without dead ends: 477 [2023-02-17 01:24:15,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 247 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 35.7s TimeCoverageRelationStatistics Valid=743, Invalid=2550, Unknown=13, NotChecked=0, Total=3306 [2023-02-17 01:24:15,200 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 107 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 1848 mSolverCounterSat, 209 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 2076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1848 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.9s IncrementalHoareTripleChecker+Time [2023-02-17 01:24:15,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 303 Invalid, 2076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1848 Invalid, 19 Unknown, 0 Unchecked, 56.9s Time] [2023-02-17 01:24:15,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2023-02-17 01:24:15,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 455. [2023-02-17 01:24:15,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 236 states have (on average 1.1652542372881356) internal successors, (275), 240 states have internal predecessors, (275), 189 states have call successors, (189), 29 states have call predecessors, (189), 29 states have return successors, (188), 185 states have call predecessors, (188), 188 states have call successors, (188) [2023-02-17 01:24:15,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 652 transitions. [2023-02-17 01:24:15,491 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 652 transitions. Word has length 139 [2023-02-17 01:24:15,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:24:15,491 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 652 transitions. [2023-02-17 01:24:15,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 27 states have internal predecessors, (57), 15 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (46), 15 states have call predecessors, (46), 14 states have call successors, (46) [2023-02-17 01:24:15,492 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 652 transitions. [2023-02-17 01:24:15,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-02-17 01:24:15,493 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:24:15,493 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:24:15,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-17 01:24:15,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-17 01:24:15,699 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:24:15,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:24:15,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1673937813, now seen corresponding path program 3 times [2023-02-17 01:24:15,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:24:15,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225404144] [2023-02-17 01:24:15,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:24:15,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:24:15,705 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:24:15,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1795727218] [2023-02-17 01:24:15,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 01:24:15,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:24:15,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:24:15,707 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:24:15,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-17 01:24:16,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-17 01:24:16,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:24:16,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-17 01:24:16,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:24:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 98 proven. 37 refuted. 0 times theorem prover too weak. 751 trivial. 0 not checked. [2023-02-17 01:24:16,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:24:19,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:24:19,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225404144] [2023-02-17 01:24:19,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:24:19,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795727218] [2023-02-17 01:24:19,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795727218] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:24:19,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:24:19,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-17 01:24:19,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073999982] [2023-02-17 01:24:19,172 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 01:24:19,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 01:24:19,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:24:19,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 01:24:19,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=430, Unknown=1, NotChecked=0, Total=506 [2023-02-17 01:24:19,173 INFO L87 Difference]: Start difference. First operand 455 states and 652 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-17 01:24:19,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:24:19,982 INFO L93 Difference]: Finished difference Result 465 states and 661 transitions. [2023-02-17 01:24:19,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 01:24:19,983 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 5 states have call successors, (12) Word has length 142 [2023-02-17 01:24:19,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:24:19,984 INFO L225 Difference]: With dead ends: 465 [2023-02-17 01:24:19,985 INFO L226 Difference]: Without dead ends: 458 [2023-02-17 01:24:19,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=128, Invalid=683, Unknown=1, NotChecked=0, Total=812 [2023-02-17 01:24:19,985 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 35 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 01:24:19,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 127 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 01:24:19,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2023-02-17 01:24:20,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 440. [2023-02-17 01:24:20,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 229 states have (on average 1.1572052401746724) internal successors, (265), 233 states have internal predecessors, (265), 181 states have call successors, (181), 29 states have call predecessors, (181), 29 states have return successors, (180), 177 states have call predecessors, (180), 180 states have call successors, (180) [2023-02-17 01:24:20,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 626 transitions. [2023-02-17 01:24:20,267 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 626 transitions. Word has length 142 [2023-02-17 01:24:20,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:24:20,268 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 626 transitions. [2023-02-17 01:24:20,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-17 01:24:20,268 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 626 transitions. [2023-02-17 01:24:20,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-02-17 01:24:20,269 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:24:20,269 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:24:20,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-17 01:24:20,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-17 01:24:20,489 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:24:20,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:24:20,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1994246729, now seen corresponding path program 4 times [2023-02-17 01:24:20,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:24:20,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546816953] [2023-02-17 01:24:20,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:24:20,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:24:20,495 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:24:20,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1538560756] [2023-02-17 01:24:20,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 01:24:20,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:24:20,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:24:20,501 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:24:20,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-17 01:24:20,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 01:24:20,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:24:20,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 73 conjunts are in the unsatisfiable core [2023-02-17 01:24:20,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:24:20,772 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 93 proven. 80 refuted. 0 times theorem prover too weak. 718 trivial. 0 not checked. [2023-02-17 01:24:20,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:24:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 93 proven. 71 refuted. 0 times theorem prover too weak. 727 trivial. 0 not checked. [2023-02-17 01:24:21,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:24:21,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546816953] [2023-02-17 01:24:21,740 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:24:21,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538560756] [2023-02-17 01:24:21,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538560756] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:24:21,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:24:21,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2023-02-17 01:24:21,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275856567] [2023-02-17 01:24:21,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:24:21,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-17 01:24:21,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:24:21,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-17 01:24:21,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2023-02-17 01:24:21,742 INFO L87 Difference]: Start difference. First operand 440 states and 626 transitions. Second operand has 33 states, 31 states have (on average 1.903225806451613) internal successors, (59), 29 states have internal predecessors, (59), 18 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (48), 16 states have call predecessors, (48), 16 states have call successors, (48) [2023-02-17 01:24:49,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:24:49,298 INFO L93 Difference]: Finished difference Result 603 states and 886 transitions. [2023-02-17 01:24:49,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-17 01:24:49,299 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.903225806451613) internal successors, (59), 29 states have internal predecessors, (59), 18 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (48), 16 states have call predecessors, (48), 16 states have call successors, (48) Word has length 145 [2023-02-17 01:24:49,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:24:49,302 INFO L225 Difference]: With dead ends: 603 [2023-02-17 01:24:49,302 INFO L226 Difference]: Without dead ends: 595 [2023-02-17 01:24:49,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1567 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1056, Invalid=5750, Unknown=0, NotChecked=0, Total=6806 [2023-02-17 01:24:49,304 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 237 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 2587 mSolverCounterSat, 590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 3177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 2587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.2s IncrementalHoareTripleChecker+Time [2023-02-17 01:24:49,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 402 Invalid, 3177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [590 Valid, 2587 Invalid, 0 Unknown, 0 Unchecked, 21.2s Time] [2023-02-17 01:24:49,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2023-02-17 01:24:49,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 542. [2023-02-17 01:24:49,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 272 states have (on average 1.1764705882352942) internal successors, (320), 276 states have internal predecessors, (320), 237 states have call successors, (237), 32 states have call predecessors, (237), 32 states have return successors, (236), 233 states have call predecessors, (236), 236 states have call successors, (236) [2023-02-17 01:24:49,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 793 transitions. [2023-02-17 01:24:49,760 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 793 transitions. Word has length 145 [2023-02-17 01:24:49,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:24:49,760 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 793 transitions. [2023-02-17 01:24:49,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.903225806451613) internal successors, (59), 29 states have internal predecessors, (59), 18 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (48), 16 states have call predecessors, (48), 16 states have call successors, (48) [2023-02-17 01:24:49,761 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 793 transitions. [2023-02-17 01:24:49,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-02-17 01:24:49,762 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:24:49,762 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:24:49,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-17 01:24:49,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:24:49,967 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:24:49,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:24:49,968 INFO L85 PathProgramCache]: Analyzing trace with hash 891434155, now seen corresponding path program 5 times [2023-02-17 01:24:49,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:24:49,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972526657] [2023-02-17 01:24:49,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:24:49,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:24:49,975 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:24:49,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [273250187] [2023-02-17 01:24:49,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 01:24:49,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:24:49,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:24:49,977 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:24:50,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-17 01:24:50,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-02-17 01:24:50,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:24:50,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-17 01:24:50,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:24:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2023-02-17 01:24:50,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:24:51,928 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2023-02-17 01:24:51,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:24:51,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972526657] [2023-02-17 01:24:51,929 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:24:51,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273250187] [2023-02-17 01:24:51,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273250187] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:24:51,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:24:51,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2023-02-17 01:24:51,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571780551] [2023-02-17 01:24:51,930 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:24:51,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-17 01:24:51,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:24:51,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-17 01:24:51,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2023-02-17 01:24:51,931 INFO L87 Difference]: Start difference. First operand 542 states and 793 transitions. Second operand has 27 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 15 states have call successors, (48), 3 states have call predecessors, (48), 1 states have return successors, (46), 13 states have call predecessors, (46), 13 states have call successors, (46) [2023-02-17 01:25:08,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:25:18,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:25:21,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:25:21,124 INFO L93 Difference]: Finished difference Result 786 states and 1183 transitions. [2023-02-17 01:25:21,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-02-17 01:25:21,125 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 15 states have call successors, (48), 3 states have call predecessors, (48), 1 states have return successors, (46), 13 states have call predecessors, (46), 13 states have call successors, (46) Word has length 145 [2023-02-17 01:25:21,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:25:21,146 INFO L225 Difference]: With dead ends: 786 [2023-02-17 01:25:21,146 INFO L226 Difference]: Without dead ends: 778 [2023-02-17 01:25:21,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1117, Invalid=4889, Unknown=0, NotChecked=0, Total=6006 [2023-02-17 01:25:21,149 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 165 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 2061 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 2486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 2061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.4s IncrementalHoareTripleChecker+Time [2023-02-17 01:25:21,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 592 Invalid, 2486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 2061 Invalid, 0 Unknown, 0 Unchecked, 22.4s Time] [2023-02-17 01:25:21,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2023-02-17 01:25:21,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 694. [2023-02-17 01:25:21,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 340 states have (on average 1.1852941176470588) internal successors, (403), 343 states have internal predecessors, (403), 317 states have call successors, (317), 36 states have call predecessors, (317), 36 states have return successors, (316), 314 states have call predecessors, (316), 316 states have call successors, (316) [2023-02-17 01:25:21,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1036 transitions. [2023-02-17 01:25:21,809 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1036 transitions. Word has length 145 [2023-02-17 01:25:21,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:25:21,810 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 1036 transitions. [2023-02-17 01:25:21,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 15 states have call successors, (48), 3 states have call predecessors, (48), 1 states have return successors, (46), 13 states have call predecessors, (46), 13 states have call successors, (46) [2023-02-17 01:25:21,811 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1036 transitions. [2023-02-17 01:25:21,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-02-17 01:25:21,813 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:25:21,813 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:25:21,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-17 01:25:22,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:25:22,018 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:25:22,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:25:22,019 INFO L85 PathProgramCache]: Analyzing trace with hash 194788219, now seen corresponding path program 5 times [2023-02-17 01:25:22,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:25:22,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789235331] [2023-02-17 01:25:22,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:25:22,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:25:22,039 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:25:22,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1686224517] [2023-02-17 01:25:22,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 01:25:22,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:25:22,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:25:22,042 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:25:22,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-17 01:25:27,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-17 01:25:27,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:25:27,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 71 conjunts are in the unsatisfiable core [2023-02-17 01:25:27,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:25:30,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 118 proven. 334 refuted. 0 times theorem prover too weak. 730 trivial. 0 not checked. [2023-02-17 01:25:30,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:25:30,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:25:30,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789235331] [2023-02-17 01:25:30,662 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:25:30,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686224517] [2023-02-17 01:25:30,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686224517] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:25:30,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:25:30,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-02-17 01:25:30,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2595058] [2023-02-17 01:25:30,662 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 01:25:30,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-17 01:25:30,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:25:30,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-17 01:25:30,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2023-02-17 01:25:30,663 INFO L87 Difference]: Start difference. First operand 694 states and 1036 transitions. Second operand has 23 states, 20 states have (on average 1.85) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 13 states have call predecessors, (27), 10 states have call successors, (27) [2023-02-17 01:25:42,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:25:42,343 INFO L93 Difference]: Finished difference Result 760 states and 1133 transitions. [2023-02-17 01:25:42,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-17 01:25:42,344 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.85) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 13 states have call predecessors, (27), 10 states have call successors, (27) Word has length 164 [2023-02-17 01:25:42,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:25:42,365 INFO L225 Difference]: With dead ends: 760 [2023-02-17 01:25:42,365 INFO L226 Difference]: Without dead ends: 758 [2023-02-17 01:25:42,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=153, Invalid=1407, Unknown=0, NotChecked=0, Total=1560 [2023-02-17 01:25:42,367 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 42 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 1848 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 1879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2023-02-17 01:25:42,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 433 Invalid, 1879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1848 Invalid, 0 Unknown, 0 Unchecked, 10.3s Time] [2023-02-17 01:25:42,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2023-02-17 01:25:43,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 739. [2023-02-17 01:25:43,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 362 states have (on average 1.1850828729281768) internal successors, (429), 365 states have internal predecessors, (429), 337 states have call successors, (337), 39 states have call predecessors, (337), 39 states have return successors, (336), 334 states have call predecessors, (336), 336 states have call successors, (336) [2023-02-17 01:25:43,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1102 transitions. [2023-02-17 01:25:43,080 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1102 transitions. Word has length 164 [2023-02-17 01:25:43,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:25:43,080 INFO L495 AbstractCegarLoop]: Abstraction has 739 states and 1102 transitions. [2023-02-17 01:25:43,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.85) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 13 states have call predecessors, (27), 10 states have call successors, (27) [2023-02-17 01:25:43,081 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1102 transitions. [2023-02-17 01:25:43,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-02-17 01:25:43,082 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:25:43,082 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 7, 7, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:25:43,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-17 01:25:43,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:25:43,290 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:25:43,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:25:43,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1844747192, now seen corresponding path program 6 times [2023-02-17 01:25:43,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:25:43,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291862600] [2023-02-17 01:25:43,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:25:43,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:25:43,297 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:25:43,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056665425] [2023-02-17 01:25:43,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 01:25:43,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:25:43,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:25:43,313 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:25:43,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-17 01:25:43,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-17 01:25:43,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:25:43,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 88 conjunts are in the unsatisfiable core [2023-02-17 01:25:43,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:25:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 188 proven. 138 refuted. 0 times theorem prover too weak. 1171 trivial. 0 not checked. [2023-02-17 01:25:43,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:25:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 184 proven. 133 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2023-02-17 01:25:45,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:25:45,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291862600] [2023-02-17 01:25:45,592 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:25:45,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056665425] [2023-02-17 01:25:45,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056665425] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:25:45,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:25:45,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 35 [2023-02-17 01:25:45,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813243341] [2023-02-17 01:25:45,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:25:45,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-17 01:25:45,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:25:45,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-17 01:25:45,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2023-02-17 01:25:45,594 INFO L87 Difference]: Start difference. First operand 739 states and 1102 transitions. Second operand has 35 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 30 states have internal predecessors, (65), 21 states have call successors, (60), 3 states have call predecessors, (60), 3 states have return successors, (58), 19 states have call predecessors, (58), 19 states have call successors, (58) [2023-02-17 01:25:54,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:25:54,904 INFO L93 Difference]: Finished difference Result 789 states and 1173 transitions. [2023-02-17 01:25:54,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-17 01:25:54,906 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 30 states have internal predecessors, (65), 21 states have call successors, (60), 3 states have call predecessors, (60), 3 states have return successors, (58), 19 states have call predecessors, (58), 19 states have call successors, (58) Word has length 178 [2023-02-17 01:25:54,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:25:54,909 INFO L225 Difference]: With dead ends: 789 [2023-02-17 01:25:54,909 INFO L226 Difference]: Without dead ends: 787 [2023-02-17 01:25:54,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 320 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=573, Invalid=2183, Unknown=0, NotChecked=0, Total=2756 [2023-02-17 01:25:54,911 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 71 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 1804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-02-17 01:25:54,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 325 Invalid, 1804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-02-17 01:25:54,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2023-02-17 01:25:55,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 784. [2023-02-17 01:25:55,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 384 states have (on average 1.1848958333333333) internal successors, (455), 387 states have internal predecessors, (455), 357 states have call successors, (357), 42 states have call predecessors, (357), 42 states have return successors, (356), 354 states have call predecessors, (356), 356 states have call successors, (356) [2023-02-17 01:25:55,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1168 transitions. [2023-02-17 01:25:55,801 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1168 transitions. Word has length 178 [2023-02-17 01:25:55,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:25:55,802 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1168 transitions. [2023-02-17 01:25:55,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 30 states have internal predecessors, (65), 21 states have call successors, (60), 3 states have call predecessors, (60), 3 states have return successors, (58), 19 states have call predecessors, (58), 19 states have call successors, (58) [2023-02-17 01:25:55,802 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1168 transitions. [2023-02-17 01:25:55,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-02-17 01:25:55,804 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:25:55,804 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:25:55,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-17 01:25:56,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:25:56,009 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:25:56,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:25:56,010 INFO L85 PathProgramCache]: Analyzing trace with hash -933690801, now seen corresponding path program 6 times [2023-02-17 01:25:56,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:25:56,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133641050] [2023-02-17 01:25:56,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:25:56,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:25:56,023 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:25:56,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141267120] [2023-02-17 01:25:56,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 01:25:56,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:25:56,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:25:56,025 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:25:56,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-17 01:25:56,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-17 01:25:56,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:25:56,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 81 conjunts are in the unsatisfiable core [2023-02-17 01:25:56,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:25:56,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1733 backedges. 139 proven. 130 refuted. 0 times theorem prover too weak. 1464 trivial. 0 not checked. [2023-02-17 01:25:56,972 INFO L328 TraceCheckSpWp]: Computing backward predicates...