./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9e9911e775b3214ba13077b05d83e9364947724e9afa3bb89f51b07ee325bd90 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 17:15:06,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 17:15:06,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 17:15:06,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 17:15:06,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 17:15:06,987 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 17:15:06,988 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 17:15:06,991 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 17:15:06,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 17:15:06,993 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 17:15:06,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 17:15:06,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 17:15:06,996 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 17:15:06,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 17:15:06,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 17:15:07,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 17:15:07,001 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 17:15:07,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 17:15:07,005 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 17:15:07,006 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 17:15:07,008 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 17:15:07,009 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 17:15:07,010 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 17:15:07,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 17:15:07,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 17:15:07,016 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 17:15:07,016 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 17:15:07,016 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 17:15:07,017 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 17:15:07,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 17:15:07,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 17:15:07,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 17:15:07,020 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 17:15:07,021 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 17:15:07,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 17:15:07,022 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 17:15:07,023 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 17:15:07,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 17:15:07,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 17:15:07,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 17:15:07,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 17:15:07,025 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 17:15:07,051 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 17:15:07,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 17:15:07,051 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 17:15:07,052 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 17:15:07,052 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 17:15:07,052 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 17:15:07,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 17:15:07,053 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 17:15:07,053 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 17:15:07,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 17:15:07,054 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 17:15:07,054 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 17:15:07,054 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 17:15:07,054 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 17:15:07,054 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 17:15:07,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 17:15:07,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 17:15:07,055 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 17:15:07,055 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 17:15:07,055 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 17:15:07,055 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 17:15:07,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 17:15:07,055 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 17:15:07,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 17:15:07,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 17:15:07,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 17:15:07,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 17:15:07,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 17:15:07,056 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 17:15:07,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 17:15:07,057 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 17:15:07,057 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 17:15:07,057 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 17:15:07,057 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 17:15:07,057 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 17:15:07,057 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e9911e775b3214ba13077b05d83e9364947724e9afa3bb89f51b07ee325bd90 [2023-02-18 17:15:07,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 17:15:07,305 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 17:15:07,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 17:15:07,308 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 17:15:07,308 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 17:15:07,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.c [2023-02-18 17:15:08,379 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 17:15:08,501 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 17:15:08,502 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.c [2023-02-18 17:15:08,506 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/041f95bfb/ecd6ea1b51404490ba58dd14481802c2/FLAGb277b0d53 [2023-02-18 17:15:08,517 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/041f95bfb/ecd6ea1b51404490ba58dd14481802c2 [2023-02-18 17:15:08,519 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 17:15:08,520 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 17:15:08,521 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 17:15:08,521 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 17:15:08,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 17:15:08,524 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 05:15:08" (1/1) ... [2023-02-18 17:15:08,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@217ad0cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:15:08, skipping insertion in model container [2023-02-18 17:15:08,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 05:15:08" (1/1) ... [2023-02-18 17:15:08,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 17:15:08,539 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 17:15:08,616 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.c[490,503] [2023-02-18 17:15:08,628 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 17:15:08,633 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 17:15:08,640 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound20.c[490,503] [2023-02-18 17:15:08,645 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 17:15:08,653 INFO L208 MainTranslator]: Completed translation [2023-02-18 17:15:08,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:15:08 WrapperNode [2023-02-18 17:15:08,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 17:15:08,654 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 17:15:08,655 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 17:15:08,655 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 17:15:08,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:15:08" (1/1) ... [2023-02-18 17:15:08,663 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:15:08" (1/1) ... [2023-02-18 17:15:08,675 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 84 [2023-02-18 17:15:08,675 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 17:15:08,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 17:15:08,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 17:15:08,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 17:15:08,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:15:08" (1/1) ... [2023-02-18 17:15:08,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:15:08" (1/1) ... [2023-02-18 17:15:08,682 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:15:08" (1/1) ... [2023-02-18 17:15:08,682 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:15:08" (1/1) ... [2023-02-18 17:15:08,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:15:08" (1/1) ... [2023-02-18 17:15:08,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:15:08" (1/1) ... [2023-02-18 17:15:08,686 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:15:08" (1/1) ... [2023-02-18 17:15:08,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:15:08" (1/1) ... [2023-02-18 17:15:08,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 17:15:08,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 17:15:08,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 17:15:08,689 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 17:15:08,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:15:08" (1/1) ... [2023-02-18 17:15:08,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 17:15:08,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:15:08,709 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-18 17:15:08,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-18 17:15:08,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 17:15:08,740 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-18 17:15:08,740 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-18 17:15:08,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 17:15:08,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 17:15:08,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 17:15:08,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 17:15:08,740 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 17:15:08,800 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 17:15:08,801 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 17:15:08,953 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 17:15:08,957 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 17:15:08,957 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-18 17:15:08,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:15:08 BoogieIcfgContainer [2023-02-18 17:15:08,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 17:15:08,960 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 17:15:08,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 17:15:08,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 17:15:08,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 05:15:08" (1/3) ... [2023-02-18 17:15:08,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df3ff99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 05:15:08, skipping insertion in model container [2023-02-18 17:15:08,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:15:08" (2/3) ... [2023-02-18 17:15:08,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df3ff99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 05:15:08, skipping insertion in model container [2023-02-18 17:15:08,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:15:08" (3/3) ... [2023-02-18 17:15:08,964 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound20.c [2023-02-18 17:15:08,975 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 17:15:08,975 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 17:15:09,003 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 17:15:09,007 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;@455a1606, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 17:15:09,007 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 17:15:09,010 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 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) [2023-02-18 17:15:09,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 17:15:09,028 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:15:09,028 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:15:09,028 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:15:09,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:15:09,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1022199732, now seen corresponding path program 1 times [2023-02-18 17:15:09,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:15:09,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438208532] [2023-02-18 17:15:09,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:09,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:15:09,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:15:09,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:15:09,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438208532] [2023-02-18 17:15:09,144 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 17:15:09,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379861487] [2023-02-18 17:15:09,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:09,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:15:09,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:15:09,153 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:15:09,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 17:15:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:15:09,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 17:15:09,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:15:09,224 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-18 17:15:09,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:15:09,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379861487] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:15:09,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:15:09,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 17:15:09,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580616235] [2023-02-18 17:15:09,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:15:09,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 17:15:09,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:15:09,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 17:15:09,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 17:15:09,261 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 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) [2023-02-18 17:15:09,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:15:09,276 INFO L93 Difference]: Finished difference Result 65 states and 104 transitions. [2023-02-18 17:15:09,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 17:15:09,278 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 [2023-02-18 17:15:09,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:15:09,282 INFO L225 Difference]: With dead ends: 65 [2023-02-18 17:15:09,282 INFO L226 Difference]: Without dead ends: 30 [2023-02-18 17:15:09,284 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 [2023-02-18 17:15:09,286 INFO L413 NwaCegarLoop]: 45 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, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:15:09,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:15:09,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-18 17:15:09,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-02-18 17:15:09,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-18 17:15:09,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2023-02-18 17:15:09,310 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 28 [2023-02-18 17:15:09,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:15:09,310 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2023-02-18 17:15:09,310 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) [2023-02-18 17:15:09,311 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2023-02-18 17:15:09,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 17:15:09,312 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:15:09,312 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] [2023-02-18 17:15:09,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 17:15:09,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-18 17:15:09,517 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:15:09,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:15:09,518 INFO L85 PathProgramCache]: Analyzing trace with hash -455220980, now seen corresponding path program 1 times [2023-02-18 17:15:09,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:15:09,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900127801] [2023-02-18 17:15:09,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:09,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:15:09,537 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:15:09,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1015046637] [2023-02-18 17:15:09,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:09,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:15:09,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:15:09,541 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:15:09,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 17:15:09,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:15:09,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 17:15:09,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:15:09,610 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 17:15:09,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:15:09,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:15:09,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900127801] [2023-02-18 17:15:09,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:15:09,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015046637] [2023-02-18 17:15:09,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015046637] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:15:09,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:15:09,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 17:15:09,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672276255] [2023-02-18 17:15:09,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:15:09,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 17:15:09,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:15:09,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 17:15:09,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 17:15:09,613 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-02-18 17:15:09,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:15:09,625 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2023-02-18 17:15:09,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 17:15:09,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 29 [2023-02-18 17:15:09,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:15:09,626 INFO L225 Difference]: With dead ends: 40 [2023-02-18 17:15:09,626 INFO L226 Difference]: Without dead ends: 32 [2023-02-18 17:15:09,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 17:15:09,628 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:15:09,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:15:09,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-18 17:15:09,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-18 17:15:09,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-18 17:15:09,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2023-02-18 17:15:09,633 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 29 [2023-02-18 17:15:09,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:15:09,634 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2023-02-18 17:15:09,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-02-18 17:15:09,634 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2023-02-18 17:15:09,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 17:15:09,635 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:15:09,635 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] [2023-02-18 17:15:09,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-18 17:15:09,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-18 17:15:09,842 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:15:09,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:15:09,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1233535180, now seen corresponding path program 1 times [2023-02-18 17:15:09,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:15:09,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416212488] [2023-02-18 17:15:09,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:09,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:15:09,852 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:15:09,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849618554] [2023-02-18 17:15:09,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:09,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:15:09,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:15:09,853 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:15:09,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 17:15:09,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:15:09,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 17:15:09,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:15:09,917 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 17:15:09,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:15:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 17:15:09,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:15:09,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416212488] [2023-02-18 17:15:09,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:15:09,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849618554] [2023-02-18 17:15:09,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849618554] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:15:09,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:15:09,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2023-02-18 17:15:09,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891763413] [2023-02-18 17:15:09,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:15:09,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 17:15:09,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:15:09,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 17:15:09,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-18 17:15:09,951 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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) [2023-02-18 17:15:10,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:15:10,006 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2023-02-18 17:15:10,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:15:10,007 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 30 [2023-02-18 17:15:10,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:15:10,008 INFO L225 Difference]: With dead ends: 49 [2023-02-18 17:15:10,008 INFO L226 Difference]: Without dead ends: 41 [2023-02-18 17:15:10,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-02-18 17:15:10,009 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 29 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:15:10,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 92 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:15:10,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-18 17:15:10,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2023-02-18 17:15:10,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-18 17:15:10,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2023-02-18 17:15:10,015 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 30 [2023-02-18 17:15:10,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:15:10,015 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2023-02-18 17:15:10,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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) [2023-02-18 17:15:10,016 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2023-02-18 17:15:10,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 17:15:10,016 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:15:10,016 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, 1, 1] [2023-02-18 17:15:10,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-18 17:15:10,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:15:10,221 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:15:10,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:15:10,223 INFO L85 PathProgramCache]: Analyzing trace with hash -73118621, now seen corresponding path program 1 times [2023-02-18 17:15:10,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:15:10,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800036281] [2023-02-18 17:15:10,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:10,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:15:10,238 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:15:10,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [973072005] [2023-02-18 17:15:10,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:10,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:15:10,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:15:10,253 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:15:10,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 17:15:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:15:10,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 17:15:10,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:15:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 17:15:10,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:15:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 17:15:10,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:15:10,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800036281] [2023-02-18 17:15:10,407 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:15:10,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973072005] [2023-02-18 17:15:10,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973072005] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 17:15:10,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:15:10,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-02-18 17:15:10,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307989304] [2023-02-18 17:15:10,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:15:10,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 17:15:10,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:15:10,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 17:15:10,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-18 17:15:10,409 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (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) [2023-02-18 17:15:10,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:15:10,439 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-02-18 17:15:10,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:15:10,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (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 32 [2023-02-18 17:15:10,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:15:10,440 INFO L225 Difference]: With dead ends: 39 [2023-02-18 17:15:10,440 INFO L226 Difference]: Without dead ends: 37 [2023-02-18 17:15:10,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-18 17:15:10,441 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 114 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 [2023-02-18 17:15:10,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 114 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:15:10,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-18 17:15:10,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-02-18 17:15:10,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 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) [2023-02-18 17:15:10,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2023-02-18 17:15:10,446 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 32 [2023-02-18 17:15:10,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:15:10,446 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2023-02-18 17:15:10,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (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) [2023-02-18 17:15:10,447 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2023-02-18 17:15:10,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 17:15:10,447 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:15:10,448 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] [2023-02-18 17:15:10,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-18 17:15:10,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:15:10,652 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:15:10,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:15:10,653 INFO L85 PathProgramCache]: Analyzing trace with hash 96561445, now seen corresponding path program 1 times [2023-02-18 17:15:10,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:15:10,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20770486] [2023-02-18 17:15:10,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:10,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:15:10,663 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:15:10,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [161135206] [2023-02-18 17:15:10,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:10,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:15:10,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:15:10,680 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:15:10,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 17:15:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:15:10,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 17:15:10,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:15:10,755 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 17:15:10,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:15:10,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:15:10,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20770486] [2023-02-18 17:15:10,756 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:15:10,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161135206] [2023-02-18 17:15:10,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161135206] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:15:10,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:15:10,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 17:15:10,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69237433] [2023-02-18 17:15:10,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:15:10,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 17:15:10,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:15:10,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 17:15:10,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 17:15:10,759 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-02-18 17:15:10,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:15:10,781 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2023-02-18 17:15:10,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 17:15:10,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 35 [2023-02-18 17:15:10,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:15:10,783 INFO L225 Difference]: With dead ends: 62 [2023-02-18 17:15:10,783 INFO L226 Difference]: Without dead ends: 39 [2023-02-18 17:15:10,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 17:15:10,785 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:15:10,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:15:10,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-02-18 17:15:10,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-02-18 17:15:10,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 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) [2023-02-18 17:15:10,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2023-02-18 17:15:10,796 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 35 [2023-02-18 17:15:10,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:15:10,797 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2023-02-18 17:15:10,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-02-18 17:15:10,798 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2023-02-18 17:15:10,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 17:15:10,799 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:15:10,799 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, 1, 1] [2023-02-18 17:15:10,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 17:15:11,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:15:11,005 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:15:11,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:15:11,009 INFO L85 PathProgramCache]: Analyzing trace with hash 433790877, now seen corresponding path program 1 times [2023-02-18 17:15:11,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:15:11,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293032809] [2023-02-18 17:15:11,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:11,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:15:11,017 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:15:11,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1721449338] [2023-02-18 17:15:11,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:11,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:15:11,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:15:11,021 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:15:11,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 17:15:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:15:11,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 17:15:11,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:15:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 17:15:11,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:15:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 17:15:11,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:15:11,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293032809] [2023-02-18 17:15:11,214 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:15:11,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721449338] [2023-02-18 17:15:11,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721449338] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 17:15:11,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:15:11,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-02-18 17:15:11,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632361102] [2023-02-18 17:15:11,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:15:11,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 17:15:11,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:15:11,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 17:15:11,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-18 17:15:11,216 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-02-18 17:15:11,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:15:11,254 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2023-02-18 17:15:11,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:15:11,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 37 [2023-02-18 17:15:11,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:15:11,256 INFO L225 Difference]: With dead ends: 53 [2023-02-18 17:15:11,256 INFO L226 Difference]: Without dead ends: 51 [2023-02-18 17:15:11,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-18 17:15:11,258 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:15:11,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 140 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:15:11,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-18 17:15:11,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2023-02-18 17:15:11,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 32 states have internal predecessors, (38), 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) [2023-02-18 17:15:11,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2023-02-18 17:15:11,272 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 37 [2023-02-18 17:15:11,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:15:11,273 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2023-02-18 17:15:11,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-02-18 17:15:11,275 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2023-02-18 17:15:11,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-18 17:15:11,280 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:15:11,280 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, 1, 1] [2023-02-18 17:15:11,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-18 17:15:11,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:15:11,487 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:15:11,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:15:11,487 INFO L85 PathProgramCache]: Analyzing trace with hash -553232285, now seen corresponding path program 1 times [2023-02-18 17:15:11,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:15:11,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108982009] [2023-02-18 17:15:11,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:11,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:15:11,495 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:15:11,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [370805419] [2023-02-18 17:15:11,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:11,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:15:11,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:15:11,497 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:15:11,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 17:15:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:15:11,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 17:15:11,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:15:11,577 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 17:15:11,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:15:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-18 17:15:11,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:15:11,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108982009] [2023-02-18 17:15:11,601 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:15:11,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370805419] [2023-02-18 17:15:11,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370805419] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 17:15:11,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:15:11,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-02-18 17:15:11,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729158816] [2023-02-18 17:15:11,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:15:11,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 17:15:11,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:15:11,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 17:15:11,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-18 17:15:11,603 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-02-18 17:15:11,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:15:11,638 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2023-02-18 17:15:11,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:15:11,638 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 42 [2023-02-18 17:15:11,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:15:11,639 INFO L225 Difference]: With dead ends: 57 [2023-02-18 17:15:11,639 INFO L226 Difference]: Without dead ends: 55 [2023-02-18 17:15:11,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-18 17:15:11,640 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 131 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 [2023-02-18 17:15:11,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 131 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:15:11,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-18 17:15:11,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2023-02-18 17:15:11,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 35 states have internal predecessors, (41), 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) [2023-02-18 17:15:11,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2023-02-18 17:15:11,646 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 42 [2023-02-18 17:15:11,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:15:11,647 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2023-02-18 17:15:11,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-02-18 17:15:11,647 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2023-02-18 17:15:11,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-18 17:15:11,648 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:15:11,648 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, 1, 1] [2023-02-18 17:15:11,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 17:15:11,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:15:11,853 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:15:11,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:15:11,853 INFO L85 PathProgramCache]: Analyzing trace with hash 2115683101, now seen corresponding path program 1 times [2023-02-18 17:15:11,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:15:11,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158680160] [2023-02-18 17:15:11,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:11,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:15:11,860 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:15:11,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586599021] [2023-02-18 17:15:11,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:11,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:15:11,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:15:11,873 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:15:11,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 17:15:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:15:11,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 17:15:11,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:15:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 17:15:11,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:15:12,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:15:12,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158680160] [2023-02-18 17:15:12,035 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:15:12,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586599021] [2023-02-18 17:15:12,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586599021] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:15:12,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:15:12,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-02-18 17:15:12,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772485675] [2023-02-18 17:15:12,036 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:15:12,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 17:15:12,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:15:12,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 17:15:12,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-18 17:15:12,037 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 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) [2023-02-18 17:15:12,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:15:12,116 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2023-02-18 17:15:12,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 17:15:12,116 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 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 47 [2023-02-18 17:15:12,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:15:12,117 INFO L225 Difference]: With dead ends: 61 [2023-02-18 17:15:12,117 INFO L226 Difference]: Without dead ends: 59 [2023-02-18 17:15:12,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-18 17:15:12,118 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 115 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 [2023-02-18 17:15:12,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 115 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:15:12,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-18 17:15:12,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2023-02-18 17:15:12,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 38 states have internal predecessors, (44), 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) [2023-02-18 17:15:12,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2023-02-18 17:15:12,129 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 47 [2023-02-18 17:15:12,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:15:12,130 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2023-02-18 17:15:12,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 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) [2023-02-18 17:15:12,130 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2023-02-18 17:15:12,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-18 17:15:12,130 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:15:12,131 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, 1, 1] [2023-02-18 17:15:12,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 17:15:12,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-18 17:15:12,336 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:15:12,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:15:12,336 INFO L85 PathProgramCache]: Analyzing trace with hash -879665460, now seen corresponding path program 1 times [2023-02-18 17:15:12,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:15:12,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536848198] [2023-02-18 17:15:12,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:12,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:15:12,343 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:15:12,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1008089213] [2023-02-18 17:15:12,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:12,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:15:12,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:15:12,345 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:15:12,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 17:15:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:15:12,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 17:15:12,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:15:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-18 17:15:12,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:15:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-18 17:15:12,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:15:12,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536848198] [2023-02-18 17:15:12,415 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:15:12,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008089213] [2023-02-18 17:15:12,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008089213] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:15:12,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:15:12,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-18 17:15:12,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46528633] [2023-02-18 17:15:12,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:15:12,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 17:15:12,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:15:12,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 17:15:12,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-18 17:15:12,417 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-02-18 17:15:12,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:15:12,506 INFO L93 Difference]: Finished difference Result 211 states and 250 transitions. [2023-02-18 17:15:12,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 17:15:12,507 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 56 [2023-02-18 17:15:12,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:15:12,509 INFO L225 Difference]: With dead ends: 211 [2023-02-18 17:15:12,509 INFO L226 Difference]: Without dead ends: 203 [2023-02-18 17:15:12,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-02-18 17:15:12,510 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 80 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:15:12,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 186 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:15:12,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-02-18 17:15:12,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 195. [2023-02-18 17:15:12,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 125 states have (on average 1.192) internal successors, (149), 129 states have internal predecessors, (149), 44 states have call successors, (44), 25 states have call predecessors, (44), 25 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-02-18 17:15:12,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 233 transitions. [2023-02-18 17:15:12,542 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 233 transitions. Word has length 56 [2023-02-18 17:15:12,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:15:12,542 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 233 transitions. [2023-02-18 17:15:12,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-02-18 17:15:12,542 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 233 transitions. [2023-02-18 17:15:12,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-18 17:15:12,543 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:15:12,543 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 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, 1] [2023-02-18 17:15:12,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 17:15:12,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:15:12,748 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:15:12,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:15:12,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1506412172, now seen corresponding path program 1 times [2023-02-18 17:15:12,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:15:12,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290975853] [2023-02-18 17:15:12,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:12,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:15:12,755 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:15:12,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205930665] [2023-02-18 17:15:12,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:12,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:15:12,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:15:12,773 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:15:12,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 17:15:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:15:12,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 17:15:12,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:15:12,845 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-18 17:15:12,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:15:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-18 17:15:12,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:15:12,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290975853] [2023-02-18 17:15:12,873 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:15:12,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205930665] [2023-02-18 17:15:12,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205930665] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:15:12,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:15:12,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-18 17:15:12,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062568124] [2023-02-18 17:15:12,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:15:12,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 17:15:12,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:15:12,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 17:15:12,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-18 17:15:12,875 INFO L87 Difference]: Start difference. First operand 195 states and 233 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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) [2023-02-18 17:15:13,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:15:13,021 INFO L93 Difference]: Finished difference Result 279 states and 364 transitions. [2023-02-18 17:15:13,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 17:15:13,021 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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 57 [2023-02-18 17:15:13,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:15:13,023 INFO L225 Difference]: With dead ends: 279 [2023-02-18 17:15:13,023 INFO L226 Difference]: Without dead ends: 259 [2023-02-18 17:15:13,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-02-18 17:15:13,024 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 70 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:15:13,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 334 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:15:13,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-02-18 17:15:13,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2023-02-18 17:15:13,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 152 states have (on average 1.2236842105263157) internal successors, (186), 155 states have internal predecessors, (186), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-02-18 17:15:13,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 299 transitions. [2023-02-18 17:15:13,042 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 299 transitions. Word has length 57 [2023-02-18 17:15:13,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:15:13,043 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 299 transitions. [2023-02-18 17:15:13,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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) [2023-02-18 17:15:13,043 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 299 transitions. [2023-02-18 17:15:13,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-18 17:15:13,044 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:15:13,044 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 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, 1] [2023-02-18 17:15:13,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 17:15:13,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-18 17:15:13,249 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:15:13,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:15:13,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1869160295, now seen corresponding path program 1 times [2023-02-18 17:15:13,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:15:13,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119477305] [2023-02-18 17:15:13,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:13,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:15:13,256 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:15:13,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265342112] [2023-02-18 17:15:13,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:13,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:15:13,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:15:13,257 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:15:13,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 17:15:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:15:13,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 17:15:13,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:15:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-18 17:15:13,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:15:13,325 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-18 17:15:13,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:15:13,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119477305] [2023-02-18 17:15:13,326 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:15:13,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265342112] [2023-02-18 17:15:13,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265342112] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:15:13,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:15:13,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-18 17:15:13,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047261541] [2023-02-18 17:15:13,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:15:13,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 17:15:13,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:15:13,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 17:15:13,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-18 17:15:13,328 INFO L87 Difference]: Start difference. First operand 235 states and 299 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-02-18 17:15:13,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:15:13,423 INFO L93 Difference]: Finished difference Result 344 states and 448 transitions. [2023-02-18 17:15:13,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 17:15:13,423 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 59 [2023-02-18 17:15:13,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:15:13,424 INFO L225 Difference]: With dead ends: 344 [2023-02-18 17:15:13,424 INFO L226 Difference]: Without dead ends: 248 [2023-02-18 17:15:13,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-02-18 17:15:13,426 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 74 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:15:13,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 200 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:15:13,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-02-18 17:15:13,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2023-02-18 17:15:13,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 161 states have (on average 1.173913043478261) internal successors, (189), 164 states have internal predecessors, (189), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-02-18 17:15:13,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 302 transitions. [2023-02-18 17:15:13,441 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 302 transitions. Word has length 59 [2023-02-18 17:15:13,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:15:13,446 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 302 transitions. [2023-02-18 17:15:13,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-02-18 17:15:13,447 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 302 transitions. [2023-02-18 17:15:13,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-18 17:15:13,447 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:15:13,447 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 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, 1, 1] [2023-02-18 17:15:13,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 17:15:13,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-18 17:15:13,652 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:15:13,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:15:13,652 INFO L85 PathProgramCache]: Analyzing trace with hash 991223133, now seen corresponding path program 1 times [2023-02-18 17:15:13,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:15:13,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055886018] [2023-02-18 17:15:13,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:13,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:15:13,659 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:15:13,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986787406] [2023-02-18 17:15:13,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:13,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:15:13,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:15:13,660 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:15:13,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 17:15:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:15:13,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 17:15:13,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:15:13,781 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-02-18 17:15:13,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:15:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-18 17:15:13,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:15:13,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055886018] [2023-02-18 17:15:13,828 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:15:13,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986787406] [2023-02-18 17:15:13,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986787406] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:15:13,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:15:13,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2023-02-18 17:15:13,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375558608] [2023-02-18 17:15:13,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:15:13,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 17:15:13,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:15:13,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 17:15:13,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-02-18 17:15:13,830 INFO L87 Difference]: Start difference. First operand 244 states and 302 transitions. Second operand has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 8 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2023-02-18 17:15:14,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:15:14,379 INFO L93 Difference]: Finished difference Result 330 states and 429 transitions. [2023-02-18 17:15:14,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 17:15:14,380 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 8 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 64 [2023-02-18 17:15:14,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:15:14,382 INFO L225 Difference]: With dead ends: 330 [2023-02-18 17:15:14,382 INFO L226 Difference]: Without dead ends: 324 [2023-02-18 17:15:14,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2023-02-18 17:15:14,383 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 66 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 17:15:14,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 345 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 17:15:14,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-02-18 17:15:14,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 291. [2023-02-18 17:15:14,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 194 states have (on average 1.1958762886597938) internal successors, (232), 203 states have internal predecessors, (232), 69 states have call successors, (69), 27 states have call predecessors, (69), 27 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2023-02-18 17:15:14,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 366 transitions. [2023-02-18 17:15:14,406 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 366 transitions. Word has length 64 [2023-02-18 17:15:14,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:15:14,406 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 366 transitions. [2023-02-18 17:15:14,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 8 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2023-02-18 17:15:14,407 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 366 transitions. [2023-02-18 17:15:14,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-18 17:15:14,407 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:15:14,407 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 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] [2023-02-18 17:15:14,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 17:15:14,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-18 17:15:14,614 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:15:14,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:15:14,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1694315171, now seen corresponding path program 2 times [2023-02-18 17:15:14,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:15:14,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914853175] [2023-02-18 17:15:14,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:14,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:15:14,620 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:15:14,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1641416645] [2023-02-18 17:15:14,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 17:15:14,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:15:14,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:15:14,622 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:15:14,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 17:15:14,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 17:15:14,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:15:14,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-18 17:15:14,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:15:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 26 proven. 21 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-18 17:15:14,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:15:14,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:15:14,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914853175] [2023-02-18 17:15:14,784 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:15:14,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641416645] [2023-02-18 17:15:14,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641416645] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:15:14,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:15:14,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-02-18 17:15:14,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812503943] [2023-02-18 17:15:14,785 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:15:14,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 17:15:14,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:15:14,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 17:15:14,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-02-18 17:15:14,786 INFO L87 Difference]: Start difference. First operand 291 states and 366 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-02-18 17:15:14,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:15:14,993 INFO L93 Difference]: Finished difference Result 315 states and 393 transitions. [2023-02-18 17:15:14,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 17:15:14,993 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 69 [2023-02-18 17:15:14,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:15:14,994 INFO L225 Difference]: With dead ends: 315 [2023-02-18 17:15:14,994 INFO L226 Difference]: Without dead ends: 313 [2023-02-18 17:15:14,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-02-18 17:15:14,995 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 40 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 17:15:14,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 198 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 17:15:14,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2023-02-18 17:15:15,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 310. [2023-02-18 17:15:15,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 206 states have (on average 1.1941747572815533) internal successors, (246), 215 states have internal predecessors, (246), 73 states have call successors, (73), 30 states have call predecessors, (73), 30 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2023-02-18 17:15:15,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 388 transitions. [2023-02-18 17:15:15,023 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 388 transitions. Word has length 69 [2023-02-18 17:15:15,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:15:15,024 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 388 transitions. [2023-02-18 17:15:15,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-02-18 17:15:15,024 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 388 transitions. [2023-02-18 17:15:15,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-18 17:15:15,024 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:15:15,025 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 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] [2023-02-18 17:15:15,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-18 17:15:15,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-18 17:15:15,229 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:15:15,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:15:15,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1349365539, now seen corresponding path program 3 times [2023-02-18 17:15:15,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:15:15,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597281738] [2023-02-18 17:15:15,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:15,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:15:15,236 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:15:15,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1615923589] [2023-02-18 17:15:15,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 17:15:15,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:15:15,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:15:15,237 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:15:15,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 17:15:15,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 17:15:15,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:15:15,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-18 17:15:15,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:15:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 37 proven. 16 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-18 17:15:15,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:15:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-02-18 17:15:16,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:15:16,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597281738] [2023-02-18 17:15:16,256 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:15:16,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615923589] [2023-02-18 17:15:16,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615923589] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:15:16,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:15:16,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2023-02-18 17:15:16,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316609357] [2023-02-18 17:15:16,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:15:16,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 17:15:16,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:15:16,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 17:15:16,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2023-02-18 17:15:16,258 INFO L87 Difference]: Start difference. First operand 310 states and 388 transitions. Second operand has 24 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 11 states have call predecessors, (22), 8 states have call successors, (22) [2023-02-18 17:15:23,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:15:26,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:15:28,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:15:28,448 INFO L93 Difference]: Finished difference Result 402 states and 527 transitions. [2023-02-18 17:15:28,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 17:15:28,449 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 11 states have call predecessors, (22), 8 states have call successors, (22) Word has length 74 [2023-02-18 17:15:28,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:15:28,450 INFO L225 Difference]: With dead ends: 402 [2023-02-18 17:15:28,450 INFO L226 Difference]: Without dead ends: 398 [2023-02-18 17:15:28,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=302, Invalid=1338, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 17:15:28,451 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 184 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 157 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2023-02-18 17:15:28,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 267 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 799 Invalid, 1 Unknown, 0 Unchecked, 10.4s Time] [2023-02-18 17:15:28,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2023-02-18 17:15:28,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 367. [2023-02-18 17:15:28,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 241 states have (on average 1.2157676348547717) internal successors, (293), 250 states have internal predecessors, (293), 93 states have call successors, (93), 33 states have call predecessors, (93), 32 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) [2023-02-18 17:15:28,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 475 transitions. [2023-02-18 17:15:28,513 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 475 transitions. Word has length 74 [2023-02-18 17:15:28,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:15:28,514 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 475 transitions. [2023-02-18 17:15:28,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 11 states have call predecessors, (22), 8 states have call successors, (22) [2023-02-18 17:15:28,514 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 475 transitions. [2023-02-18 17:15:28,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-18 17:15:28,515 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:15:28,515 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 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] [2023-02-18 17:15:28,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 17:15:28,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:15:28,720 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:15:28,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:15:28,721 INFO L85 PathProgramCache]: Analyzing trace with hash -484140586, now seen corresponding path program 1 times [2023-02-18 17:15:28,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:15:28,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532375782] [2023-02-18 17:15:28,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:28,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:15:28,731 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:15:28,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [878431246] [2023-02-18 17:15:28,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:28,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:15:28,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:15:28,732 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:15:28,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 17:15:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:15:28,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-18 17:15:28,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:15:28,880 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-02-18 17:15:28,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:15:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-02-18 17:15:29,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:15:29,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532375782] [2023-02-18 17:15:29,433 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:15:29,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878431246] [2023-02-18 17:15:29,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878431246] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:15:29,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:15:29,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-02-18 17:15:29,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896485662] [2023-02-18 17:15:29,434 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:15:29,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 17:15:29,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:15:29,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 17:15:29,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-02-18 17:15:29,435 INFO L87 Difference]: Start difference. First operand 367 states and 475 transitions. Second operand has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 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) [2023-02-18 17:15:36,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:15:36,806 INFO L93 Difference]: Finished difference Result 523 states and 722 transitions. [2023-02-18 17:15:36,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-18 17:15:36,806 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 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 80 [2023-02-18 17:15:36,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:15:36,808 INFO L225 Difference]: With dead ends: 523 [2023-02-18 17:15:36,808 INFO L226 Difference]: Without dead ends: 512 [2023-02-18 17:15:36,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=375, Invalid=1605, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 17:15:36,809 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 169 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-02-18 17:15:36,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 670 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-02-18 17:15:36,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2023-02-18 17:15:36,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 478. [2023-02-18 17:15:36,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 311 states have (on average 1.2668810289389068) internal successors, (394), 321 states have internal predecessors, (394), 133 states have call successors, (133), 33 states have call predecessors, (133), 33 states have return successors, (131), 123 states have call predecessors, (131), 131 states have call successors, (131) [2023-02-18 17:15:36,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 658 transitions. [2023-02-18 17:15:36,968 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 658 transitions. Word has length 80 [2023-02-18 17:15:36,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:15:36,969 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 658 transitions. [2023-02-18 17:15:36,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 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) [2023-02-18 17:15:36,969 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 658 transitions. [2023-02-18 17:15:36,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-02-18 17:15:36,970 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:15:36,970 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 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] [2023-02-18 17:15:36,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-18 17:15:37,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-18 17:15:37,175 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:15:37,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:15:37,176 INFO L85 PathProgramCache]: Analyzing trace with hash 164622435, now seen corresponding path program 4 times [2023-02-18 17:15:37,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:15:37,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885388879] [2023-02-18 17:15:37,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:37,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:15:37,181 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:15:37,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1095734955] [2023-02-18 17:15:37,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 17:15:37,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:15:37,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:15:37,190 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:15:37,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 17:15:37,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 17:15:37,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:15:37,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 17:15:37,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:15:37,244 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-02-18 17:15:37,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:15:37,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:15:37,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885388879] [2023-02-18 17:15:37,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:15:37,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095734955] [2023-02-18 17:15:37,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095734955] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:15:37,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:15:37,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 17:15:37,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300433613] [2023-02-18 17:15:37,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:15:37,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 17:15:37,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:15:37,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 17:15:37,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 17:15:37,246 INFO L87 Difference]: Start difference. First operand 478 states and 658 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2023-02-18 17:15:37,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:15:37,430 INFO L93 Difference]: Finished difference Result 745 states and 1090 transitions. [2023-02-18 17:15:37,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:15:37,431 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 96 [2023-02-18 17:15:37,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:15:37,433 INFO L225 Difference]: With dead ends: 745 [2023-02-18 17:15:37,433 INFO L226 Difference]: Without dead ends: 513 [2023-02-18 17:15:37,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-18 17:15:37,434 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 13 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:15:37,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 163 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:15:37,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2023-02-18 17:15:37,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 470. [2023-02-18 17:15:37,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 303 states have (on average 1.2640264026402641) internal successors, (383), 311 states have internal predecessors, (383), 133 states have call successors, (133), 33 states have call predecessors, (133), 33 states have return successors, (131), 125 states have call predecessors, (131), 131 states have call successors, (131) [2023-02-18 17:15:37,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 647 transitions. [2023-02-18 17:15:37,555 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 647 transitions. Word has length 96 [2023-02-18 17:15:37,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:15:37,555 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 647 transitions. [2023-02-18 17:15:37,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2023-02-18 17:15:37,556 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 647 transitions. [2023-02-18 17:15:37,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-02-18 17:15:37,557 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:15:37,557 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:15:37,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-18 17:15:37,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-18 17:15:37,762 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:15:37,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:15:37,762 INFO L85 PathProgramCache]: Analyzing trace with hash -245423741, now seen corresponding path program 1 times [2023-02-18 17:15:37,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:15:37,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339187212] [2023-02-18 17:15:37,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:37,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:15:37,769 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:15:37,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [459427286] [2023-02-18 17:15:37,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:37,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:15:37,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:15:37,770 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:15:37,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-18 17:15:37,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:15:37,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 17:15:37,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:15:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-02-18 17:15:37,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:15:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-02-18 17:15:37,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:15:37,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339187212] [2023-02-18 17:15:37,919 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:15:37,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459427286] [2023-02-18 17:15:37,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459427286] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:15:37,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:15:37,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-02-18 17:15:37,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146407766] [2023-02-18 17:15:37,920 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:15:37,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 17:15:37,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:15:37,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 17:15:37,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-02-18 17:15:37,921 INFO L87 Difference]: Start difference. First operand 470 states and 647 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2023-02-18 17:15:38,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:15:38,493 INFO L93 Difference]: Finished difference Result 1512 states and 2112 transitions. [2023-02-18 17:15:38,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-18 17:15:38,494 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 112 [2023-02-18 17:15:38,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:15:38,499 INFO L225 Difference]: With dead ends: 1512 [2023-02-18 17:15:38,499 INFO L226 Difference]: Without dead ends: 1270 [2023-02-18 17:15:38,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=311, Invalid=559, Unknown=0, NotChecked=0, Total=870 [2023-02-18 17:15:38,501 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 201 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 17:15:38,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 363 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 17:15:38,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2023-02-18 17:15:38,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 1208. [2023-02-18 17:15:38,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 758 states have (on average 1.2097625329815302) internal successors, (917), 780 states have internal predecessors, (917), 344 states have call successors, (344), 105 states have call predecessors, (344), 105 states have return successors, (335), 322 states have call predecessors, (335), 335 states have call successors, (335) [2023-02-18 17:15:38,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1596 transitions. [2023-02-18 17:15:38,821 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1596 transitions. Word has length 112 [2023-02-18 17:15:38,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:15:38,821 INFO L495 AbstractCegarLoop]: Abstraction has 1208 states and 1596 transitions. [2023-02-18 17:15:38,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2023-02-18 17:15:38,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1596 transitions. [2023-02-18 17:15:38,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-02-18 17:15:38,823 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:15:38,823 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:15:38,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-18 17:15:39,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-18 17:15:39,028 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:15:39,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:15:39,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1897577373, now seen corresponding path program 1 times [2023-02-18 17:15:39,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:15:39,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711483086] [2023-02-18 17:15:39,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:39,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:15:39,045 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:15:39,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384454864] [2023-02-18 17:15:39,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:39,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:15:39,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:15:39,063 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:15:39,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-18 17:15:39,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:15:39,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-18 17:15:39,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:15:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-02-18 17:15:39,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:15:40,240 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-02-18 17:15:40,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:15:40,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711483086] [2023-02-18 17:15:40,240 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:15:40,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384454864] [2023-02-18 17:15:40,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384454864] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:15:40,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:15:40,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2023-02-18 17:15:40,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387768586] [2023-02-18 17:15:40,241 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:15:40,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 17:15:40,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:15:40,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 17:15:40,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2023-02-18 17:15:40,242 INFO L87 Difference]: Start difference. First operand 1208 states and 1596 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 20 states have internal predecessors, (54), 12 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2023-02-18 17:15:58,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:15:58,790 INFO L93 Difference]: Finished difference Result 1636 states and 2227 transitions. [2023-02-18 17:15:58,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-18 17:15:58,790 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 20 states have internal predecessors, (54), 12 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) Word has length 115 [2023-02-18 17:15:58,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:15:58,795 INFO L225 Difference]: With dead ends: 1636 [2023-02-18 17:15:58,795 INFO L226 Difference]: Without dead ends: 1634 [2023-02-18 17:15:58,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=752, Invalid=2908, Unknown=0, NotChecked=0, Total=3660 [2023-02-18 17:15:58,797 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 210 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 1557 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 1948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 1557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2023-02-18 17:15:58,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 962 Invalid, 1948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 1557 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2023-02-18 17:15:58,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1634 states. [2023-02-18 17:15:59,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1634 to 1538. [2023-02-18 17:15:59,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 947 states have (on average 1.2196409714889123) internal successors, (1155), 968 states have internal predecessors, (1155), 468 states have call successors, (468), 122 states have call predecessors, (468), 122 states have return successors, (459), 447 states have call predecessors, (459), 459 states have call successors, (459) [2023-02-18 17:15:59,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 2082 transitions. [2023-02-18 17:15:59,313 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 2082 transitions. Word has length 115 [2023-02-18 17:15:59,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:15:59,314 INFO L495 AbstractCegarLoop]: Abstraction has 1538 states and 2082 transitions. [2023-02-18 17:15:59,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 20 states have internal predecessors, (54), 12 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2023-02-18 17:15:59,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 2082 transitions. [2023-02-18 17:15:59,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-02-18 17:15:59,315 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:15:59,315 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:15:59,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-18 17:15:59,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-18 17:15:59,520 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:15:59,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:15:59,521 INFO L85 PathProgramCache]: Analyzing trace with hash 364386885, now seen corresponding path program 2 times [2023-02-18 17:15:59,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:15:59,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235996616] [2023-02-18 17:15:59,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:15:59,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:15:59,528 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:15:59,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957925539] [2023-02-18 17:15:59,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 17:15:59,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:15:59,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:15:59,530 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:15:59,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-18 17:15:59,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 17:15:59,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:15:59,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-18 17:15:59,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:15:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-02-18 17:15:59,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:16:00,412 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-02-18 17:16:00,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:16:00,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235996616] [2023-02-18 17:16:00,413 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:16:00,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957925539] [2023-02-18 17:16:00,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957925539] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:16:00,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:16:00,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2023-02-18 17:16:00,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278400731] [2023-02-18 17:16:00,414 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:16:00,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-18 17:16:00,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:16:00,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-18 17:16:00,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2023-02-18 17:16:00,417 INFO L87 Difference]: Start difference. First operand 1538 states and 2082 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 22 states have internal predecessors, (62), 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) [2023-02-18 17:16:10,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:16:10,366 INFO L93 Difference]: Finished difference Result 2184 states and 2993 transitions. [2023-02-18 17:16:10,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-18 17:16:10,366 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 22 states have internal predecessors, (62), 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 119 [2023-02-18 17:16:10,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:16:10,374 INFO L225 Difference]: With dead ends: 2184 [2023-02-18 17:16:10,374 INFO L226 Difference]: Without dead ends: 2182 [2023-02-18 17:16:10,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=682, Invalid=2624, Unknown=0, NotChecked=0, Total=3306 [2023-02-18 17:16:10,375 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 225 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-02-18 17:16:10,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 684 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-02-18 17:16:10,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2023-02-18 17:16:11,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 2004. [2023-02-18 17:16:11,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 1251 states have (on average 1.231814548361311) internal successors, (1541), 1271 states have internal predecessors, (1541), 597 states have call successors, (597), 155 states have call predecessors, (597), 155 states have return successors, (588), 577 states have call predecessors, (588), 588 states have call successors, (588) [2023-02-18 17:16:11,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 2726 transitions. [2023-02-18 17:16:11,134 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 2726 transitions. Word has length 119 [2023-02-18 17:16:11,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:16:11,135 INFO L495 AbstractCegarLoop]: Abstraction has 2004 states and 2726 transitions. [2023-02-18 17:16:11,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 22 states have internal predecessors, (62), 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) [2023-02-18 17:16:11,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 2726 transitions. [2023-02-18 17:16:11,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-02-18 17:16:11,137 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:16:11,137 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:16:11,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-18 17:16:11,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:16:11,343 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:16:11,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:16:11,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1493115269, now seen corresponding path program 3 times [2023-02-18 17:16:11,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:16:11,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990101555] [2023-02-18 17:16:11,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:16:11,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:16:11,350 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:16:11,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289229161] [2023-02-18 17:16:11,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 17:16:11,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:16:11,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:16:11,352 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:16:11,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-18 17:16:11,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 17:16:11,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:16:11,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-18 17:16:11,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:16:11,886 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 80 proven. 50 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2023-02-18 17:16:11,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:16:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 83 proven. 40 refuted. 7 times theorem prover too weak. 393 trivial. 0 not checked. [2023-02-18 17:16:17,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:16:17,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990101555] [2023-02-18 17:16:17,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:16:17,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289229161] [2023-02-18 17:16:17,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289229161] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:16:17,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:16:17,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2023-02-18 17:16:17,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90002467] [2023-02-18 17:16:17,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:16:17,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-18 17:16:17,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:16:17,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-18 17:16:17,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=707, Unknown=2, NotChecked=0, Total=870 [2023-02-18 17:16:17,976 INFO L87 Difference]: Start difference. First operand 2004 states and 2726 transitions. Second operand has 30 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 28 states have internal predecessors, (69), 12 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (36), 14 states have call predecessors, (36), 11 states have call successors, (36) [2023-02-18 17:16:20,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:16:24,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:16:29,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:16:34,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:16:36,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:16:38,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:16:40,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:16:42,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:16:44,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:16:46,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:16:48,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:16:50,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:16:58,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:17:00,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:17:02,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:17:04,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:17:06,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:17:08,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:17:11,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:17:13,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:17:15,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:17:24,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:17:26,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:17:28,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:17:29,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:17:29,840 INFO L93 Difference]: Finished difference Result 2509 states and 3466 transitions. [2023-02-18 17:17:29,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-18 17:17:29,841 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 28 states have internal predecessors, (69), 12 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (36), 14 states have call predecessors, (36), 11 states have call successors, (36) Word has length 124 [2023-02-18 17:17:29,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:17:29,848 INFO L225 Difference]: With dead ends: 2509 [2023-02-18 17:17:29,848 INFO L226 Difference]: Without dead ends: 2503 [2023-02-18 17:17:29,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 215 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=557, Invalid=1984, Unknown=9, NotChecked=0, Total=2550 [2023-02-18 17:17:29,850 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 173 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 190 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.3s IncrementalHoareTripleChecker+Time [2023-02-18 17:17:29,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 368 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1078 Invalid, 20 Unknown, 0 Unchecked, 52.3s Time] [2023-02-18 17:17:29,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2023-02-18 17:17:31,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 2400. [2023-02-18 17:17:31,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 1490 states have (on average 1.234228187919463) internal successors, (1839), 1515 states have internal predecessors, (1839), 740 states have call successors, (740), 170 states have call predecessors, (740), 169 states have return successors, (732), 714 states have call predecessors, (732), 732 states have call successors, (732) [2023-02-18 17:17:31,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 3311 transitions. [2023-02-18 17:17:31,052 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 3311 transitions. Word has length 124 [2023-02-18 17:17:31,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:17:31,053 INFO L495 AbstractCegarLoop]: Abstraction has 2400 states and 3311 transitions. [2023-02-18 17:17:31,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 28 states have internal predecessors, (69), 12 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (36), 14 states have call predecessors, (36), 11 states have call successors, (36) [2023-02-18 17:17:31,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 3311 transitions. [2023-02-18 17:17:31,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-02-18 17:17:31,054 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:17:31,054 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:17:31,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-18 17:17:31,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:17:31,259 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:17:31,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:17:31,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1036292276, now seen corresponding path program 1 times [2023-02-18 17:17:31,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:17:31,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215999101] [2023-02-18 17:17:31,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:17:31,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:17:31,265 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:17:31,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512091941] [2023-02-18 17:17:31,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:17:31,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:17:31,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:17:31,267 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:17:31,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-18 17:17:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:17:31,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 17:17:31,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:17:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-18 17:17:31,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:17:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2023-02-18 17:17:31,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:17:31,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215999101] [2023-02-18 17:17:31,419 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:17:31,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512091941] [2023-02-18 17:17:31,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512091941] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:17:31,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:17:31,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-02-18 17:17:31,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604721608] [2023-02-18 17:17:31,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:17:31,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 17:17:31,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:17:31,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 17:17:31,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-02-18 17:17:31,422 INFO L87 Difference]: Start difference. First operand 2400 states and 3311 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 11 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2023-02-18 17:17:32,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:17:32,893 INFO L93 Difference]: Finished difference Result 2479 states and 3391 transitions. [2023-02-18 17:17:32,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-18 17:17:32,894 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 11 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) Word has length 129 [2023-02-18 17:17:32,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:17:32,901 INFO L225 Difference]: With dead ends: 2479 [2023-02-18 17:17:32,901 INFO L226 Difference]: Without dead ends: 2444 [2023-02-18 17:17:32,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2023-02-18 17:17:32,902 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 219 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 17:17:32,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 425 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 17:17:32,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2023-02-18 17:17:34,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 2427. [2023-02-18 17:17:34,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2427 states, 1517 states have (on average 1.2003955174686882) internal successors, (1821), 1542 states have internal predecessors, (1821), 740 states have call successors, (740), 170 states have call predecessors, (740), 169 states have return successors, (732), 714 states have call predecessors, (732), 732 states have call successors, (732) [2023-02-18 17:17:34,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 3293 transitions. [2023-02-18 17:17:34,120 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 3293 transitions. Word has length 129 [2023-02-18 17:17:34,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:17:34,120 INFO L495 AbstractCegarLoop]: Abstraction has 2427 states and 3293 transitions. [2023-02-18 17:17:34,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 11 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2023-02-18 17:17:34,121 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 3293 transitions. [2023-02-18 17:17:34,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-02-18 17:17:34,122 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:17:34,122 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:17:34,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-02-18 17:17:34,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:17:34,327 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:17:34,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:17:34,328 INFO L85 PathProgramCache]: Analyzing trace with hash -2066876172, now seen corresponding path program 2 times [2023-02-18 17:17:34,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:17:34,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878684868] [2023-02-18 17:17:34,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:17:34,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:17:34,334 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:17:34,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416222494] [2023-02-18 17:17:34,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 17:17:34,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:17:34,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:17:34,338 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:17:34,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-18 17:17:34,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 17:17:34,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:17:34,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-18 17:17:34,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:17:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 35 proven. 58 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2023-02-18 17:17:34,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:17:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2023-02-18 17:17:35,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:17:35,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878684868] [2023-02-18 17:17:35,633 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:17:35,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416222494] [2023-02-18 17:17:35,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416222494] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:17:35,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:17:35,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2023-02-18 17:17:35,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581585860] [2023-02-18 17:17:35,633 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:17:35,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-18 17:17:35,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:17:35,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-18 17:17:35,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2023-02-18 17:17:35,635 INFO L87 Difference]: Start difference. First operand 2427 states and 3293 transitions. Second operand has 28 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 12 states have call predecessors, (39), 11 states have call successors, (39) [2023-02-18 17:17:47,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:18:06,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:18:06,779 INFO L93 Difference]: Finished difference Result 2855 states and 3913 transitions. [2023-02-18 17:18:06,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-02-18 17:18:06,780 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 12 states have call predecessors, (39), 11 states have call successors, (39) Word has length 130 [2023-02-18 17:18:06,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:18:06,788 INFO L225 Difference]: With dead ends: 2855 [2023-02-18 17:18:06,788 INFO L226 Difference]: Without dead ends: 2824 [2023-02-18 17:18:06,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 230 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2028 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1270, Invalid=5702, Unknown=0, NotChecked=0, Total=6972 [2023-02-18 17:18:06,791 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 347 mSDsluCounter, 1153 mSDsCounter, 0 mSdLazyCounter, 2452 mSolverCounterSat, 533 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 2986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 533 IncrementalHoareTripleChecker+Valid, 2452 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.4s IncrementalHoareTripleChecker+Time [2023-02-18 17:18:06,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 1314 Invalid, 2986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [533 Valid, 2452 Invalid, 1 Unknown, 0 Unchecked, 22.4s Time] [2023-02-18 17:18:06,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2824 states. [2023-02-18 17:18:08,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2824 to 2573. [2023-02-18 17:18:08,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 1608 states have (on average 1.2014925373134329) internal successors, (1932), 1632 states have internal predecessors, (1932), 784 states have call successors, (784), 181 states have call predecessors, (784), 180 states have return successors, (776), 759 states have call predecessors, (776), 776 states have call successors, (776) [2023-02-18 17:18:08,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 3492 transitions. [2023-02-18 17:18:08,269 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 3492 transitions. Word has length 130 [2023-02-18 17:18:08,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:18:08,269 INFO L495 AbstractCegarLoop]: Abstraction has 2573 states and 3492 transitions. [2023-02-18 17:18:08,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 12 states have call predecessors, (39), 11 states have call successors, (39) [2023-02-18 17:18:08,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 3492 transitions. [2023-02-18 17:18:08,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-02-18 17:18:08,271 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:18:08,271 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:18:08,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-18 17:18:08,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:18:08,476 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:18:08,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:18:08,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1550955276, now seen corresponding path program 3 times [2023-02-18 17:18:08,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:18:08,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441428078] [2023-02-18 17:18:08,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:18:08,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:18:08,511 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:18:08,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407023930] [2023-02-18 17:18:08,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 17:18:08,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:18:08,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:18:08,513 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:18:08,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-18 17:18:08,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 17:18:08,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:18:08,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-18 17:18:08,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:18:08,656 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 93 proven. 32 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2023-02-18 17:18:08,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:18:11,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:18:11,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441428078] [2023-02-18 17:18:11,001 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:18:11,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407023930] [2023-02-18 17:18:11,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407023930] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:18:11,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:18:11,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-02-18 17:18:11,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085554993] [2023-02-18 17:18:11,002 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:18:11,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 17:18:11,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:18:11,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 17:18:11,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=291, Unknown=1, NotChecked=0, Total=342 [2023-02-18 17:18:11,003 INFO L87 Difference]: Start difference. First operand 2573 states and 3492 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-18 17:18:12,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:18:12,725 INFO L93 Difference]: Finished difference Result 2779 states and 3732 transitions. [2023-02-18 17:18:12,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 17:18:12,726 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 149 [2023-02-18 17:18:12,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:18:12,733 INFO L225 Difference]: With dead ends: 2779 [2023-02-18 17:18:12,733 INFO L226 Difference]: Without dead ends: 2744 [2023-02-18 17:18:12,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=83, Invalid=468, Unknown=1, NotChecked=0, Total=552 [2023-02-18 17:18:12,734 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 26 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 17:18:12,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 233 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 17:18:12,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2744 states. [2023-02-18 17:18:14,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 2680. [2023-02-18 17:18:14,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2680 states, 1677 states have (on average 1.1932021466905187) internal successors, (2001), 1697 states have internal predecessors, (2001), 807 states have call successors, (807), 195 states have call predecessors, (807), 195 states have return successors, (800), 787 states have call predecessors, (800), 800 states have call successors, (800) [2023-02-18 17:18:14,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2680 states to 2680 states and 3608 transitions. [2023-02-18 17:18:14,238 INFO L78 Accepts]: Start accepts. Automaton has 2680 states and 3608 transitions. Word has length 149 [2023-02-18 17:18:14,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:18:14,240 INFO L495 AbstractCegarLoop]: Abstraction has 2680 states and 3608 transitions. [2023-02-18 17:18:14,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-18 17:18:14,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2680 states and 3608 transitions. [2023-02-18 17:18:14,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-02-18 17:18:14,242 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:18:14,242 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:18:14,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-02-18 17:18:14,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:18:14,447 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:18:14,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:18:14,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1547189055, now seen corresponding path program 4 times [2023-02-18 17:18:14,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:18:14,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688788115] [2023-02-18 17:18:14,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:18:14,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:18:14,457 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:18:14,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983411021] [2023-02-18 17:18:14,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 17:18:14,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:18:14,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:18:14,458 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:18:14,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-18 17:18:14,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 17:18:14,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:18:14,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 88 conjunts are in the unsatisfiable core [2023-02-18 17:18:14,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:18:14,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 211 proven. 134 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2023-02-18 17:18:14,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:18:29,574 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse3 (+ |c_ULTIMATE.start_main_~r~0#1| (- (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) (.cse5 (+ |c_ULTIMATE.start_main_~p~0#1| (- (* |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~k~0#1|))))) (let ((.cse11 (* |c_ULTIMATE.start_main_~x~0#1| .cse5)) (.cse12 (* |c_ULTIMATE.start_main_~y~0#1| .cse3))) (let ((.cse7 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse8 (* (- 2) |c_ULTIMATE.start_main_~x~0#1| .cse5)) (.cse9 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse10 (* (- 2) |c_ULTIMATE.start_main_~y~0#1| .cse3)) (.cse6 (+ .cse11 .cse12))) (or (>= |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~b~0#1|) (= 0 (let ((.cse4 (+ 1 (+ 1 0)))) (let ((.cse0 (+ |c_ULTIMATE.start_main_~q~0#1| (- (* .cse5 .cse4)))) (.cse1 (+ |c_ULTIMATE.start_main_~s~0#1| (- (* .cse3 .cse4))))) (let ((.cse2 (+ (* |c_ULTIMATE.start_main_~x~0#1| .cse0) (* |c_ULTIMATE.start_main_~y~0#1| .cse1)))) (+ (+ (+ (+ (+ (* .cse0 |c_ULTIMATE.start_main_~xy~0#1|) (* .cse1 |c_ULTIMATE.start_main_~yy~0#1|)) (- (* .cse0 |c_ULTIMATE.start_main_~x~0#1|))) (- (* .cse2 |c_ULTIMATE.start_main_~y~0#1|))) (- (* .cse1 |c_ULTIMATE.start_main_~y~0#1|))) .cse2))))) (>= (+ (+ (* (- 1) |c_ULTIMATE.start_main_~x~0#1| 0 .cse5) (* (- 1) |c_ULTIMATE.start_main_~y~0#1| 0 .cse3) .cse6 .cse7 .cse8 .cse9 .cse10) (+ (- .cse11) (- .cse12))) .cse6) (not (= 0 (+ (+ (+ (+ (+ (* .cse5 |c_ULTIMATE.start_main_~xy~0#1|) (* .cse3 |c_ULTIMATE.start_main_~yy~0#1|)) (- (* .cse5 |c_ULTIMATE.start_main_~x~0#1|))) (- (* .cse6 |c_ULTIMATE.start_main_~y~0#1|))) (- (* .cse3 |c_ULTIMATE.start_main_~y~0#1|))) .cse6))) (not (= (+ (* 2 .cse6) .cse7 .cse8 .cse9 .cse10) |c_ULTIMATE.start_main_~b~0#1|)) (not (= .cse6 |c_ULTIMATE.start_main_~c~0#1|)))))) is different from true [2023-02-18 17:18:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 220 proven. 73 refuted. 9 times theorem prover too weak. 856 trivial. 34 not checked. [2023-02-18 17:18:44,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:18:44,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688788115] [2023-02-18 17:18:44,390 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:18:44,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983411021] [2023-02-18 17:18:44,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983411021] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:18:44,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:18:44,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 34 [2023-02-18 17:18:44,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66642635] [2023-02-18 17:18:44,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:18:44,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 17:18:44,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:18:44,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 17:18:44,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=832, Unknown=12, NotChecked=62, Total=1122 [2023-02-18 17:18:44,392 INFO L87 Difference]: Start difference. First operand 2680 states and 3608 transitions. Second operand has 34 states, 32 states have (on average 2.46875) internal successors, (79), 29 states have internal predecessors, (79), 18 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (54), 19 states have call predecessors, (54), 17 states have call successors, (54) [2023-02-18 17:18:46,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:18:50,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:18:52,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:18:54,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:18:56,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:18:59,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:19:01,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:19:03,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:19:06,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:19:09,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:19:11,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:19:17,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:19:25,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:19:28,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:19:33,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:19:35,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:19:43,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:19:45,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:19:47,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:19:49,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:19:52,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:19:56,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:19:59,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:20:02,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:20:04,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:20:06,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:20:09,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:20:13,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:20:29,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:20:32,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:20:34,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:20:36,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:20:38,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:20:40,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:20:44,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.51s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:20:47,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:20:53,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:20:56,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:20:59,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:21:00,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:21:06,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:21:08,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:21:10,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:21:14,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:21:16,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:21:21,502 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse40 (+ 1 |c_ULTIMATE.start_main_~k~0#1|))) (let ((.cse28 (+ |c_ULTIMATE.start_main_~r~0#1| (- (* |c_ULTIMATE.start_main_~s~0#1| .cse40)))) (.cse27 (+ |c_ULTIMATE.start_main_~p~0#1| (- (* |c_ULTIMATE.start_main_~q~0#1| .cse40))))) (let ((.cse29 (* |c_ULTIMATE.start_main_~x~0#1| .cse27)) (.cse30 (* |c_ULTIMATE.start_main_~y~0#1| .cse28)) (.cse35 (- |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse15 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse13 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse23 (+ 1 0)) (.cse7 (+ |c_ULTIMATE.start_main_~c~0#1| .cse35)) (.cse24 (+ .cse29 .cse30))) (let ((.cse4 (= 0 (+ (+ (+ (+ (+ (* .cse27 |c_ULTIMATE.start_main_~xy~0#1|) (* .cse28 |c_ULTIMATE.start_main_~yy~0#1|)) (- (* .cse27 |c_ULTIMATE.start_main_~x~0#1|))) (- (* .cse24 |c_ULTIMATE.start_main_~y~0#1|))) (- (* .cse28 |c_ULTIMATE.start_main_~y~0#1|))) .cse24))) (.cse5 (not (= .cse24 .cse7))) (.cse20 (+ 1 .cse23)) (.cse3 (not (= |c_ULTIMATE.start_main_~b~0#1| (+ .cse15 .cse13)))) (.cse6 (not (= 0 (+ (+ (+ (+ (+ (* |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~xy~0#1|) (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (- (* |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~x~0#1|))) (- (* |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (- (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~y~0#1|))) |c_ULTIMATE.start_main_~b~0#1|)))) (.cse9 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse10 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|))) (and (let ((.cse0 (+ |c_ULTIMATE.start_main_~p~0#1| (- (* |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) (.cse1 (+ |c_ULTIMATE.start_main_~r~0#1| (- (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|))))) (let ((.cse2 (+ (* |c_ULTIMATE.start_main_~x~0#1| .cse0) (* |c_ULTIMATE.start_main_~y~0#1| .cse1)))) (or (>= |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~b~0#1|) (= 0 (+ (+ (+ (+ (+ (* .cse0 |c_ULTIMATE.start_main_~xy~0#1|) (* .cse1 |c_ULTIMATE.start_main_~yy~0#1|)) (- (* .cse0 |c_ULTIMATE.start_main_~x~0#1|))) (- (* .cse2 |c_ULTIMATE.start_main_~y~0#1|))) (- (* .cse1 |c_ULTIMATE.start_main_~y~0#1|))) .cse2)) (not (= .cse2 |c_ULTIMATE.start_main_~c~0#1|))))) (or .cse3 .cse4 .cse5 .cse6 (>= .cse7 |c_ULTIMATE.start_main_~b~0#1|)) (>= |c_ULTIMATE.start_main_~x~0#1| 1) (let ((.cse12 (+ |c_ULTIMATE.start_main_~r~0#1| (- (* |c_ULTIMATE.start_main_~s~0#1| .cse23)))) (.cse11 (+ |c_ULTIMATE.start_main_~p~0#1| (- (* |c_ULTIMATE.start_main_~q~0#1| .cse23))))) (let ((.cse21 (* |c_ULTIMATE.start_main_~x~0#1| .cse11)) (.cse22 (* |c_ULTIMATE.start_main_~y~0#1| .cse12))) (let ((.cse14 (* (- 2) |c_ULTIMATE.start_main_~x~0#1| .cse11)) (.cse16 (* (- 2) |c_ULTIMATE.start_main_~y~0#1| .cse12)) (.cse8 (+ .cse21 .cse22))) (or (>= .cse8 |c_ULTIMATE.start_main_~b~0#1|) (not (= (+ |c_ULTIMATE.start_main_~b~0#1| .cse9 (* (- 1) |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|) .cse10 (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) |c_ULTIMATE.start_main_~a~0#1|)) (not (= 0 (+ (+ (+ (+ (+ (* .cse11 |c_ULTIMATE.start_main_~xy~0#1|) (* .cse12 |c_ULTIMATE.start_main_~yy~0#1|)) (- (* .cse11 |c_ULTIMATE.start_main_~x~0#1|))) (- (* .cse8 |c_ULTIMATE.start_main_~y~0#1|))) (- (* .cse12 |c_ULTIMATE.start_main_~y~0#1|))) .cse8))) (not (= (+ (* 2 .cse8) .cse13 .cse14 .cse15 .cse16) |c_ULTIMATE.start_main_~b~0#1|)) (= 0 (let ((.cse17 (+ |c_ULTIMATE.start_main_~q~0#1| (- (* .cse11 .cse20)))) (.cse18 (+ |c_ULTIMATE.start_main_~s~0#1| (- (* .cse12 .cse20))))) (let ((.cse19 (+ (* |c_ULTIMATE.start_main_~x~0#1| .cse17) (* |c_ULTIMATE.start_main_~y~0#1| .cse18)))) (+ (+ (+ (+ (+ (* .cse17 |c_ULTIMATE.start_main_~xy~0#1|) (* .cse18 |c_ULTIMATE.start_main_~yy~0#1|)) (- (* .cse17 |c_ULTIMATE.start_main_~x~0#1|))) (- (* .cse19 |c_ULTIMATE.start_main_~y~0#1|))) (- (* .cse18 |c_ULTIMATE.start_main_~y~0#1|))) .cse19)))) (>= (+ (+ (* (- 1) |c_ULTIMATE.start_main_~x~0#1| 0 .cse11) (* (- 1) |c_ULTIMATE.start_main_~y~0#1| 0 .cse12) .cse8 .cse13 .cse14 .cse15 .cse16) (+ (- .cse21) (- .cse22))) .cse8))))) (let ((.cse25 (* (- 2) |c_ULTIMATE.start_main_~x~0#1| .cse27)) (.cse26 (* (- 2) |c_ULTIMATE.start_main_~y~0#1| .cse28))) (or (not .cse4) (not (= (+ (* 2 .cse24) .cse13 .cse25 .cse15 .cse26) |c_ULTIMATE.start_main_~b~0#1|)) (>= (+ (+ (* (- 1) |c_ULTIMATE.start_main_~x~0#1| 0 .cse27) (* (- 1) |c_ULTIMATE.start_main_~y~0#1| 0 .cse28) .cse24 .cse13 .cse25 .cse15 .cse26) (+ (- .cse29) (- .cse30))) .cse24) .cse5 (>= .cse24 |c_ULTIMATE.start_main_~b~0#1|) (= 0 (let ((.cse31 (+ |c_ULTIMATE.start_main_~q~0#1| (- (* .cse27 .cse20)))) (.cse32 (+ |c_ULTIMATE.start_main_~s~0#1| (- (* .cse28 .cse20))))) (let ((.cse33 (+ (* |c_ULTIMATE.start_main_~x~0#1| .cse31) (* |c_ULTIMATE.start_main_~y~0#1| .cse32)))) (+ (+ (+ (+ (+ (* .cse31 |c_ULTIMATE.start_main_~xy~0#1|) (* .cse32 |c_ULTIMATE.start_main_~yy~0#1|)) (- (* .cse31 |c_ULTIMATE.start_main_~x~0#1|))) (- (* .cse33 |c_ULTIMATE.start_main_~y~0#1|))) (- (* .cse32 |c_ULTIMATE.start_main_~y~0#1|))) .cse33)))))) (let ((.cse34 (+ (* (- 1) |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|) |c_ULTIMATE.start_main_~b~0#1| .cse9 (* (- 2) |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|) .cse10 (* (- 2) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)))) (or .cse3 (not (= .cse34 .cse7)) .cse6 (>= (+ .cse34 .cse35) |c_ULTIMATE.start_main_~b~0#1|) (= 0 (let ((.cse39 (+ 1 .cse40))) (let ((.cse36 (+ |c_ULTIMATE.start_main_~p~0#1| (- (* |c_ULTIMATE.start_main_~q~0#1| .cse39)))) (.cse37 (+ |c_ULTIMATE.start_main_~r~0#1| (- (* |c_ULTIMATE.start_main_~s~0#1| .cse39))))) (let ((.cse38 (+ (* |c_ULTIMATE.start_main_~x~0#1| .cse36) (* |c_ULTIMATE.start_main_~y~0#1| .cse37)))) (+ (+ (+ (+ (+ (* .cse36 |c_ULTIMATE.start_main_~xy~0#1|) (* .cse37 |c_ULTIMATE.start_main_~yy~0#1|)) (- (* .cse36 |c_ULTIMATE.start_main_~x~0#1|))) (- (* .cse38 |c_ULTIMATE.start_main_~y~0#1|))) (- (* .cse37 |c_ULTIMATE.start_main_~y~0#1|))) .cse38))))))))))))) is different from true [2023-02-18 17:21:23,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:21:25,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:21:28,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:21:32,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:21:36,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:21:39,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:21:42,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:21:42,574 INFO L93 Difference]: Finished difference Result 3190 states and 4315 transitions. [2023-02-18 17:21:42,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-18 17:21:42,575 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.46875) internal successors, (79), 29 states have internal predecessors, (79), 18 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (54), 19 states have call predecessors, (54), 17 states have call successors, (54) Word has length 170 [2023-02-18 17:21:42,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:21:42,584 INFO L225 Difference]: With dead ends: 3190 [2023-02-18 17:21:42,584 INFO L226 Difference]: Without dead ends: 3186 [2023-02-18 17:21:42,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 300 SyntacticMatches, 14 SemanticMatches, 59 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 69.9s TimeCoverageRelationStatistics Valid=852, Invalid=2557, Unknown=21, NotChecked=230, Total=3660 [2023-02-18 17:21:42,586 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 247 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 2001 mSolverCounterSat, 332 mSolverCounterUnsat, 47 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 133.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 2538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 2001 IncrementalHoareTripleChecker+Invalid, 47 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 133.9s IncrementalHoareTripleChecker+Time [2023-02-18 17:21:42,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 553 Invalid, 2538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 2001 Invalid, 47 Unknown, 158 Unchecked, 133.9s Time] [2023-02-18 17:21:42,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3186 states. [2023-02-18 17:21:45,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3186 to 3104. [2023-02-18 17:21:45,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 1939 states have (on average 1.2026817947395565) internal successors, (2332), 1964 states have internal predecessors, (2332), 939 states have call successors, (939), 226 states have call predecessors, (939), 225 states have return successors, (932), 913 states have call predecessors, (932), 932 states have call successors, (932) [2023-02-18 17:21:45,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 4203 transitions. [2023-02-18 17:21:45,491 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 4203 transitions. Word has length 170 [2023-02-18 17:21:45,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:21:45,491 INFO L495 AbstractCegarLoop]: Abstraction has 3104 states and 4203 transitions. [2023-02-18 17:21:45,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.46875) internal successors, (79), 29 states have internal predecessors, (79), 18 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (54), 19 states have call predecessors, (54), 17 states have call successors, (54) [2023-02-18 17:21:45,492 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 4203 transitions. [2023-02-18 17:21:45,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-02-18 17:21:45,494 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:21:45,494 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:21:45,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-02-18 17:21:45,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:21:45,700 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:21:45,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:21:45,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1918218936, now seen corresponding path program 4 times [2023-02-18 17:21:45,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:21:45,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959293065] [2023-02-18 17:21:45,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:45,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:21:45,709 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:21:45,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355220309] [2023-02-18 17:21:45,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 17:21:45,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:21:45,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:21:45,711 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:21:45,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-18 17:21:45,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 17:21:45,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:21:45,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 73 conjunts are in the unsatisfiable core [2023-02-18 17:21:45,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:21:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 48 proven. 124 refuted. 0 times theorem prover too weak. 1119 trivial. 0 not checked. [2023-02-18 17:21:45,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:21:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 48 proven. 115 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2023-02-18 17:21:51,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:21:51,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959293065] [2023-02-18 17:21:51,627 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:21:51,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355220309] [2023-02-18 17:21:51,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355220309] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:21:51,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:21:51,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2023-02-18 17:21:51,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053502713] [2023-02-18 17:21:51,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:21:51,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-18 17:21:51,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:21:51,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-18 17:21:51,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2023-02-18 17:21:51,629 INFO L87 Difference]: Start difference. First operand 3104 states and 4203 transitions. Second operand has 31 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 28 states have internal predecessors, (76), 18 states have call successors, (57), 3 states have call predecessors, (57), 2 states have return successors, (56), 16 states have call predecessors, (56), 16 states have call successors, (56) [2023-02-18 17:22:35,107 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 [] [2023-02-18 17:22:38,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:22:56,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:22:59,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:22:59,302 INFO L93 Difference]: Finished difference Result 3382 states and 4598 transitions. [2023-02-18 17:22:59,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-02-18 17:22:59,302 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 28 states have internal predecessors, (76), 18 states have call successors, (57), 3 states have call predecessors, (57), 2 states have return successors, (56), 16 states have call predecessors, (56), 16 states have call successors, (56) Word has length 176 [2023-02-18 17:22:59,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:22:59,321 INFO L225 Difference]: With dead ends: 3382 [2023-02-18 17:22:59,321 INFO L226 Difference]: Without dead ends: 3354 [2023-02-18 17:22:59,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 320 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1918 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=1433, Invalid=6399, Unknown=0, NotChecked=0, Total=7832 [2023-02-18 17:22:59,324 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 366 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 3361 mSolverCounterSat, 657 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 1530 SdHoareTripleChecker+Invalid, 4019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 657 IncrementalHoareTripleChecker+Valid, 3361 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:22:59,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 1530 Invalid, 4019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [657 Valid, 3361 Invalid, 1 Unknown, 0 Unchecked, 50.0s Time] [2023-02-18 17:22:59,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3354 states. [2023-02-18 17:23:02,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3354 to 3217. [2023-02-18 17:23:02,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3217 states, 2005 states have (on average 1.198503740648379) internal successors, (2403), 2027 states have internal predecessors, (2403), 982 states have call successors, (982), 230 states have call predecessors, (982), 229 states have return successors, (976), 959 states have call predecessors, (976), 976 states have call successors, (976) [2023-02-18 17:23:02,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3217 states to 3217 states and 4361 transitions. [2023-02-18 17:23:02,574 INFO L78 Accepts]: Start accepts. Automaton has 3217 states and 4361 transitions. Word has length 176 [2023-02-18 17:23:02,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:23:02,575 INFO L495 AbstractCegarLoop]: Abstraction has 3217 states and 4361 transitions. [2023-02-18 17:23:02,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 28 states have internal predecessors, (76), 18 states have call successors, (57), 3 states have call predecessors, (57), 2 states have return successors, (56), 16 states have call predecessors, (56), 16 states have call successors, (56) [2023-02-18 17:23:02,575 INFO L276 IsEmpty]: Start isEmpty. Operand 3217 states and 4361 transitions. [2023-02-18 17:23:02,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-02-18 17:23:02,577 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:23:02,577 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:23:02,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-18 17:23:02,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-18 17:23:02,780 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:23:02,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:23:02,781 INFO L85 PathProgramCache]: Analyzing trace with hash 2015575860, now seen corresponding path program 5 times [2023-02-18 17:23:02,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:23:02,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909455143] [2023-02-18 17:23:02,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:23:02,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:23:02,802 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:23:02,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391436046] [2023-02-18 17:23:02,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 17:23:02,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:23:02,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:23:02,817 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:23:02,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-18 17:23:02,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-18 17:23:02,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:23:02,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-18 17:23:02,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:23:03,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 48 proven. 115 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2023-02-18 17:23:03,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:23:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 48 proven. 115 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2023-02-18 17:23:07,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:23:07,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909455143] [2023-02-18 17:23:07,795 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:23:07,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391436046] [2023-02-18 17:23:07,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391436046] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:23:07,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:23:07,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2023-02-18 17:23:07,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479266612] [2023-02-18 17:23:07,796 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:23:07,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-18 17:23:07,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:23:07,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-18 17:23:07,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2023-02-18 17:23:07,798 INFO L87 Difference]: Start difference. First operand 3217 states and 4361 transitions. Second operand has 28 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 17 states have call successors, (56), 3 states have call predecessors, (56), 1 states have return successors, (54), 15 states have call predecessors, (54), 15 states have call successors, (54) [2023-02-18 17:23:35,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:23:37,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:23:52,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:23:56,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:24:02,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:24:06,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:24:06,672 INFO L93 Difference]: Finished difference Result 3547 states and 4796 transitions. [2023-02-18 17:24:06,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-18 17:24:06,673 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 17 states have call successors, (56), 3 states have call predecessors, (56), 1 states have return successors, (54), 15 states have call predecessors, (54), 15 states have call successors, (54) Word has length 176 [2023-02-18 17:24:06,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:24:06,702 INFO L225 Difference]: With dead ends: 3547 [2023-02-18 17:24:06,702 INFO L226 Difference]: Without dead ends: 3519 [2023-02-18 17:24:06,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=1009, Invalid=4691, Unknown=0, NotChecked=0, Total=5700 [2023-02-18 17:24:06,704 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 236 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 2286 mSolverCounterSat, 563 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 2852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 563 IncrementalHoareTripleChecker+Valid, 2286 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.7s IncrementalHoareTripleChecker+Time [2023-02-18 17:24:06,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 957 Invalid, 2852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [563 Valid, 2286 Invalid, 3 Unknown, 0 Unchecked, 48.7s Time] [2023-02-18 17:24:06,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3519 states. [2023-02-18 17:24:10,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3519 to 3391. [2023-02-18 17:24:10,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3391 states, 2114 states have (on average 1.1925260170293284) internal successors, (2521), 2137 states have internal predecessors, (2521), 1029 states have call successors, (1029), 247 states have call predecessors, (1029), 247 states have return successors, (1024), 1006 states have call predecessors, (1024), 1024 states have call successors, (1024) [2023-02-18 17:24:10,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3391 states to 3391 states and 4574 transitions. [2023-02-18 17:24:10,239 INFO L78 Accepts]: Start accepts. Automaton has 3391 states and 4574 transitions. Word has length 176 [2023-02-18 17:24:10,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:24:10,239 INFO L495 AbstractCegarLoop]: Abstraction has 3391 states and 4574 transitions. [2023-02-18 17:24:10,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 17 states have call successors, (56), 3 states have call predecessors, (56), 1 states have return successors, (54), 15 states have call predecessors, (54), 15 states have call successors, (54) [2023-02-18 17:24:10,240 INFO L276 IsEmpty]: Start isEmpty. Operand 3391 states and 4574 transitions. [2023-02-18 17:24:10,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-02-18 17:24:10,242 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:24:10,242 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:24:10,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-02-18 17:24:10,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-18 17:24:10,450 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:24:10,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:24:10,451 INFO L85 PathProgramCache]: Analyzing trace with hash -622817087, now seen corresponding path program 5 times [2023-02-18 17:24:10,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:24:10,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732353301] [2023-02-18 17:24:10,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:24:10,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:24:10,457 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:24:10,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [523622551] [2023-02-18 17:24:10,457 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 17:24:10,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:24:10,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:24:10,458 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:24:10,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-18 17:24:10,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-02-18 17:24:10,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:24:10,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 86 conjunts are in the unsatisfiable core [2023-02-18 17:24:10,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:24:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1532 backedges. 92 proven. 260 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2023-02-18 17:24:11,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:24:11,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:24:11,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732353301] [2023-02-18 17:24:11,629 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:24:11,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523622551] [2023-02-18 17:24:11,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523622551] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:24:11,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:24:11,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-18 17:24:11,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992942314] [2023-02-18 17:24:11,630 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:24:11,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 17:24:11,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:24:11,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 17:24:11,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2023-02-18 17:24:11,631 INFO L87 Difference]: Start difference. First operand 3391 states and 4574 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 17 states have internal predecessors, (50), 11 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 11 states have call predecessors, (30), 11 states have call successors, (30) [2023-02-18 17:24:16,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:24:16,852 INFO L93 Difference]: Finished difference Result 3453 states and 4630 transitions. [2023-02-18 17:24:16,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 17:24:16,853 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 17 states have internal predecessors, (50), 11 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 11 states have call predecessors, (30), 11 states have call successors, (30) Word has length 192 [2023-02-18 17:24:16,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:24:16,859 INFO L225 Difference]: With dead ends: 3453 [2023-02-18 17:24:16,859 INFO L226 Difference]: Without dead ends: 3451 [2023-02-18 17:24:16,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 255 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=209, Invalid=1351, Unknown=0, NotChecked=0, Total=1560 [2023-02-18 17:24:16,860 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 52 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 1617 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-18 17:24:16,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 679 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1617 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-18 17:24:16,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3451 states. [2023-02-18 17:24:20,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3451 to 3448. [2023-02-18 17:24:20,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3448 states, 2155 states have (on average 1.1897911832946635) internal successors, (2564), 2178 states have internal predecessors, (2564), 1033 states have call successors, (1033), 259 states have call predecessors, (1033), 259 states have return successors, (1028), 1010 states have call predecessors, (1028), 1028 states have call successors, (1028) [2023-02-18 17:24:20,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3448 states to 3448 states and 4625 transitions. [2023-02-18 17:24:20,393 INFO L78 Accepts]: Start accepts. Automaton has 3448 states and 4625 transitions. Word has length 192 [2023-02-18 17:24:20,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:24:20,394 INFO L495 AbstractCegarLoop]: Abstraction has 3448 states and 4625 transitions. [2023-02-18 17:24:20,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 17 states have internal predecessors, (50), 11 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 11 states have call predecessors, (30), 11 states have call successors, (30) [2023-02-18 17:24:20,394 INFO L276 IsEmpty]: Start isEmpty. Operand 3448 states and 4625 transitions. [2023-02-18 17:24:20,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-02-18 17:24:20,396 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:24:20,397 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:24:20,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-02-18 17:24:20,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-18 17:24:20,624 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:24:20,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:24:20,625 INFO L85 PathProgramCache]: Analyzing trace with hash 2095996656, now seen corresponding path program 6 times [2023-02-18 17:24:20,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:24:20,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93705744] [2023-02-18 17:24:20,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:24:20,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:24:20,632 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:24:20,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042545386] [2023-02-18 17:24:20,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 17:24:20,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:24:20,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:24:20,649 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:24:20,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-18 17:24:21,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-18 17:24:21,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:24:21,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-18 17:24:21,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:24:23,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 191 proven. 267 refuted. 0 times theorem prover too weak. 1302 trivial. 0 not checked. [2023-02-18 17:24:23,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:24:31,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:24:31,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93705744] [2023-02-18 17:24:31,309 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:24:31,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042545386] [2023-02-18 17:24:31,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042545386] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:24:31,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:24:31,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-02-18 17:24:31,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946379337] [2023-02-18 17:24:31,310 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:24:31,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 17:24:31,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:24:31,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 17:24:31,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=717, Unknown=2, NotChecked=0, Total=812 [2023-02-18 17:24:31,311 INFO L87 Difference]: Start difference. First operand 3448 states and 4625 transitions. Second operand has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 19 states have internal predecessors, (54), 12 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 10 states have call predecessors, (32), 11 states have call successors, (32) [2023-02-18 17:24:45,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:24:45,554 INFO L93 Difference]: Finished difference Result 4469 states and 6253 transitions. [2023-02-18 17:24:45,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-18 17:24:45,554 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 19 states have internal predecessors, (54), 12 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 10 states have call predecessors, (32), 11 states have call successors, (32) Word has length 203 [2023-02-18 17:24:45,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:24:45,563 INFO L225 Difference]: With dead ends: 4469 [2023-02-18 17:24:45,563 INFO L226 Difference]: Without dead ends: 4460 [2023-02-18 17:24:45,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=219, Invalid=1759, Unknown=2, NotChecked=0, Total=1980 [2023-02-18 17:24:45,564 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 94 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 2093 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 2151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 2093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-02-18 17:24:45,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 831 Invalid, 2151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 2093 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2023-02-18 17:24:45,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2023-02-18 17:24:50,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 4233. [2023-02-18 17:24:50,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4233 states, 2622 states have (on average 1.2280701754385965) internal successors, (3220), 2649 states have internal predecessors, (3220), 1333 states have call successors, (1333), 277 states have call predecessors, (1333), 277 states have return successors, (1328), 1306 states have call predecessors, (1328), 1328 states have call successors, (1328) [2023-02-18 17:24:50,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4233 states to 4233 states and 5881 transitions. [2023-02-18 17:24:50,051 INFO L78 Accepts]: Start accepts. Automaton has 4233 states and 5881 transitions. Word has length 203 [2023-02-18 17:24:50,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:24:50,051 INFO L495 AbstractCegarLoop]: Abstraction has 4233 states and 5881 transitions. [2023-02-18 17:24:50,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 19 states have internal predecessors, (54), 12 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 10 states have call predecessors, (32), 11 states have call successors, (32) [2023-02-18 17:24:50,052 INFO L276 IsEmpty]: Start isEmpty. Operand 4233 states and 5881 transitions. [2023-02-18 17:24:50,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-02-18 17:24:50,055 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:24:50,056 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:24:50,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-18 17:24:50,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-18 17:24:50,262 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:24:50,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:24:50,263 INFO L85 PathProgramCache]: Analyzing trace with hash -148049855, now seen corresponding path program 6 times [2023-02-18 17:24:50,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:24:50,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191615327] [2023-02-18 17:24:50,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:24:50,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:24:50,275 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:24:50,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068934807] [2023-02-18 17:24:50,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 17:24:50,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:24:50,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:24:50,277 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:24:50,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-18 17:24:50,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-18 17:24:50,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:24:50,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 83 conjunts are in the unsatisfiable core [2023-02-18 17:24:50,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:24:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 172 proven. 236 refuted. 0 times theorem prover too weak. 1608 trivial. 0 not checked. [2023-02-18 17:24:51,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:24:56,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:24:56,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191615327] [2023-02-18 17:24:56,549 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:24:56,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068934807] [2023-02-18 17:24:56,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068934807] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:24:56,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:24:56,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-02-18 17:24:56,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931872697] [2023-02-18 17:24:56,549 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:24:56,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 17:24:56,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:24:56,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 17:24:56,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=797, Unknown=1, NotChecked=0, Total=930 [2023-02-18 17:24:56,551 INFO L87 Difference]: Start difference. First operand 4233 states and 5881 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 19 states have internal predecessors, (47), 10 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) [2023-02-18 17:25:03,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:25:03,078 INFO L93 Difference]: Finished difference Result 4444 states and 6147 transitions. [2023-02-18 17:25:03,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 17:25:03,078 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 19 states have internal predecessors, (47), 10 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) Word has length 211 [2023-02-18 17:25:03,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:25:03,086 INFO L225 Difference]: With dead ends: 4444 [2023-02-18 17:25:03,086 INFO L226 Difference]: Without dead ends: 4442 [2023-02-18 17:25:03,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=205, Invalid=1276, Unknown=1, NotChecked=0, Total=1482 [2023-02-18 17:25:03,088 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 55 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-18 17:25:03,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 481 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-18 17:25:03,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4442 states. [2023-02-18 17:25:07,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4442 to 4379. [2023-02-18 17:25:07,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4379 states, 2717 states have (on average 1.2248803827751196) internal successors, (3328), 2744 states have internal predecessors, (3328), 1369 states have call successors, (1369), 292 states have call predecessors, (1369), 292 states have return successors, (1364), 1342 states have call predecessors, (1364), 1364 states have call successors, (1364) [2023-02-18 17:25:07,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4379 states to 4379 states and 6061 transitions. [2023-02-18 17:25:07,738 INFO L78 Accepts]: Start accepts. Automaton has 4379 states and 6061 transitions. Word has length 211 [2023-02-18 17:25:07,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:25:07,739 INFO L495 AbstractCegarLoop]: Abstraction has 4379 states and 6061 transitions. [2023-02-18 17:25:07,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 19 states have internal predecessors, (47), 10 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) [2023-02-18 17:25:07,739 INFO L276 IsEmpty]: Start isEmpty. Operand 4379 states and 6061 transitions. [2023-02-18 17:25:07,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-02-18 17:25:07,742 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:25:07,742 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:25:07,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-18 17:25:07,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-18 17:25:07,943 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:25:07,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:25:07,943 INFO L85 PathProgramCache]: Analyzing trace with hash -676122043, now seen corresponding path program 7 times [2023-02-18 17:25:07,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:25:07,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692798732] [2023-02-18 17:25:07,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:25:07,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:25:07,949 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:25:07,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952495160] [2023-02-18 17:25:07,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 17:25:07,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:25:07,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:25:07,953 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:25:07,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-18 17:25:08,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:25:08,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 80 conjunts are in the unsatisfiable core [2023-02-18 17:25:08,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:25:08,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 137 proven. 211 refuted. 0 times theorem prover too weak. 1668 trivial. 0 not checked. [2023-02-18 17:25:08,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:25:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 155 proven. 184 refuted. 0 times theorem prover too weak. 1677 trivial. 0 not checked. [2023-02-18 17:25:09,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:25:09,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692798732] [2023-02-18 17:25:09,868 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:25:09,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952495160] [2023-02-18 17:25:09,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952495160] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:25:09,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:25:09,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 34 [2023-02-18 17:25:09,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571035744] [2023-02-18 17:25:09,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:25:09,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 17:25:09,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:25:09,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 17:25:09,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=927, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 17:25:09,871 INFO L87 Difference]: Start difference. First operand 4379 states and 6061 transitions. Second operand has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 31 states have internal predecessors, (91), 21 states have call successors, (69), 3 states have call predecessors, (69), 3 states have return successors, (68), 21 states have call predecessors, (68), 21 states have call successors, (68) [2023-02-18 17:25:15,828 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 [] [2023-02-18 17:25:42,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:25:42,883 INFO L93 Difference]: Finished difference Result 4831 states and 6762 transitions. [2023-02-18 17:25:42,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-18 17:25:42,883 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 31 states have internal predecessors, (91), 21 states have call successors, (69), 3 states have call predecessors, (69), 3 states have return successors, (68), 21 states have call predecessors, (68), 21 states have call successors, (68) Word has length 211 [2023-02-18 17:25:42,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:25:42,906 INFO L225 Difference]: With dead ends: 4831 [2023-02-18 17:25:42,906 INFO L226 Difference]: Without dead ends: 4829 [2023-02-18 17:25:42,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 386 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=993, Invalid=4119, Unknown=0, NotChecked=0, Total=5112 [2023-02-18 17:25:42,908 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 247 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 2706 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 3122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 2706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:25:42,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 750 Invalid, 3122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 2706 Invalid, 0 Unknown, 0 Unchecked, 23.1s Time] [2023-02-18 17:25:42,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4829 states. [2023-02-18 17:25:48,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4829 to 4773. [2023-02-18 17:25:48,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4773 states, 2937 states have (on average 1.2383384405856317) internal successors, (3637), 2969 states have internal predecessors, (3637), 1528 states have call successors, (1528), 307 states have call predecessors, (1528), 307 states have return successors, (1523), 1496 states have call predecessors, (1523), 1523 states have call successors, (1523) [2023-02-18 17:25:48,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4773 states to 4773 states and 6688 transitions. [2023-02-18 17:25:48,670 INFO L78 Accepts]: Start accepts. Automaton has 4773 states and 6688 transitions. Word has length 211 [2023-02-18 17:25:48,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:25:48,671 INFO L495 AbstractCegarLoop]: Abstraction has 4773 states and 6688 transitions. [2023-02-18 17:25:48,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 31 states have internal predecessors, (91), 21 states have call successors, (69), 3 states have call predecessors, (69), 3 states have return successors, (68), 21 states have call predecessors, (68), 21 states have call successors, (68) [2023-02-18 17:25:48,671 INFO L276 IsEmpty]: Start isEmpty. Operand 4773 states and 6688 transitions. [2023-02-18 17:25:48,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2023-02-18 17:25:48,674 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:25:48,674 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:25:48,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-18 17:25:48,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:25:48,880 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:25:48,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:25:48,880 INFO L85 PathProgramCache]: Analyzing trace with hash 2020255523, now seen corresponding path program 8 times [2023-02-18 17:25:48,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:25:48,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528006129] [2023-02-18 17:25:48,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:25:48,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:25:48,889 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:25:48,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193136277] [2023-02-18 17:25:48,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 17:25:48,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:25:48,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:25:48,891 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:25:48,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-18 17:25:49,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 17:25:49,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:25:49,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 103 conjunts are in the unsatisfiable core [2023-02-18 17:25:49,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:25:49,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 211 proven. 229 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2023-02-18 17:25:49,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:25:50,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 314 proven. 37 refuted. 0 times theorem prover too weak. 1676 trivial. 0 not checked. [2023-02-18 17:25:50,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:25:50,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528006129] [2023-02-18 17:25:50,289 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:25:50,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193136277] [2023-02-18 17:25:50,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193136277] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:25:50,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:25:50,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 11] total 31 [2023-02-18 17:25:50,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548071949] [2023-02-18 17:25:50,290 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:25:50,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-18 17:25:50,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:25:50,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-18 17:25:50,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2023-02-18 17:25:50,291 INFO L87 Difference]: Start difference. First operand 4773 states and 6688 transitions. Second operand has 31 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 26 states have internal predecessors, (82), 16 states have call successors, (52), 3 states have call predecessors, (52), 3 states have return successors, (51), 17 states have call predecessors, (51), 16 states have call successors, (51) [2023-02-18 17:26:06,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:26:06,988 INFO L93 Difference]: Finished difference Result 4885 states and 6803 transitions. [2023-02-18 17:26:06,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-18 17:26:06,989 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 26 states have internal predecessors, (82), 16 states have call successors, (52), 3 states have call predecessors, (52), 3 states have return successors, (51), 17 states have call predecessors, (51), 16 states have call successors, (51) Word has length 215 [2023-02-18 17:26:06,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:26:06,997 INFO L225 Difference]: With dead ends: 4885 [2023-02-18 17:26:06,998 INFO L226 Difference]: Without dead ends: 4883 [2023-02-18 17:26:06,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 405 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=652, Invalid=2888, Unknown=0, NotChecked=0, Total=3540 [2023-02-18 17:26:06,999 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 143 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 2131 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 2412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 2131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-02-18 17:26:06,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 728 Invalid, 2412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 2131 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2023-02-18 17:26:07,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4883 states. [2023-02-18 17:26:12,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4883 to 4841. [2023-02-18 17:26:12,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4841 states, 2988 states have (on average 1.2342704149933066) internal successors, (3688), 3020 states have internal predecessors, (3688), 1528 states have call successors, (1528), 324 states have call predecessors, (1528), 324 states have return successors, (1523), 1496 states have call predecessors, (1523), 1523 states have call successors, (1523) [2023-02-18 17:26:12,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4841 states to 4841 states and 6739 transitions. [2023-02-18 17:26:12,873 INFO L78 Accepts]: Start accepts. Automaton has 4841 states and 6739 transitions. Word has length 215 [2023-02-18 17:26:12,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:26:12,873 INFO L495 AbstractCegarLoop]: Abstraction has 4841 states and 6739 transitions. [2023-02-18 17:26:12,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 26 states have internal predecessors, (82), 16 states have call successors, (52), 3 states have call predecessors, (52), 3 states have return successors, (51), 17 states have call predecessors, (51), 16 states have call successors, (51) [2023-02-18 17:26:12,874 INFO L276 IsEmpty]: Start isEmpty. Operand 4841 states and 6739 transitions. [2023-02-18 17:26:12,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2023-02-18 17:26:12,877 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:26:12,877 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:26:12,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-18 17:26:13,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:26:13,083 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:26:13,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:26:13,083 INFO L85 PathProgramCache]: Analyzing trace with hash -566966661, now seen corresponding path program 9 times [2023-02-18 17:26:13,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:26:13,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228668857] [2023-02-18 17:26:13,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:26:13,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:26:13,101 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:26:13,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1810847249] [2023-02-18 17:26:13,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 17:26:13,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:26:13,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:26:13,121 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:26:13,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-18 17:26:13,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 17:26:13,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:26:13,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-18 17:26:13,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:26:17,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 255 proven. 150 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2023-02-18 17:26:17,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:26:28,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:26:28,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228668857] [2023-02-18 17:26:28,455 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:26:28,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810847249] [2023-02-18 17:26:28,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810847249] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:26:28,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:26:28,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-18 17:26:28,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195354156] [2023-02-18 17:26:28,455 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:26:28,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 17:26:28,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:26:28,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 17:26:28,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=609, Unknown=5, NotChecked=0, Total=756 [2023-02-18 17:26:28,456 INFO L87 Difference]: Start difference. First operand 4841 states and 6739 transitions. Second operand has 20 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2023-02-18 17:26:34,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 17:26:36,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 17:26:43,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 17:26:47,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 17:26:54,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:26:54,033 INFO L93 Difference]: Finished difference Result 5272 states and 7341 transitions. [2023-02-18 17:26:54,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 17:26:54,033 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 216 [2023-02-18 17:26:54,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:26:54,043 INFO L225 Difference]: With dead ends: 5272 [2023-02-18 17:26:54,043 INFO L226 Difference]: Without dead ends: 5266 [2023-02-18 17:26:54,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=187, Invalid=863, Unknown=6, NotChecked=0, Total=1056 [2023-02-18 17:26:54,046 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 63 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 20 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:26:54,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 340 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 761 Invalid, 4 Unknown, 0 Unchecked, 16.0s Time] [2023-02-18 17:26:54,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5266 states. [2023-02-18 17:27:00,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5266 to 5060. [2023-02-18 17:27:00,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5060 states, 3133 states have (on average 1.2304500478774338) internal successors, (3855), 3169 states have internal predecessors, (3855), 1579 states have call successors, (1579), 348 states have call predecessors, (1579), 347 states have return successors, (1575), 1542 states have call predecessors, (1575), 1575 states have call successors, (1575) [2023-02-18 17:27:00,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5060 states to 5060 states and 7009 transitions. [2023-02-18 17:27:00,349 INFO L78 Accepts]: Start accepts. Automaton has 5060 states and 7009 transitions. Word has length 216 [2023-02-18 17:27:00,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:27:00,349 INFO L495 AbstractCegarLoop]: Abstraction has 5060 states and 7009 transitions. [2023-02-18 17:27:00,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2023-02-18 17:27:00,349 INFO L276 IsEmpty]: Start isEmpty. Operand 5060 states and 7009 transitions. [2023-02-18 17:27:00,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-02-18 17:27:00,353 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:27:00,353 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:27:00,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-02-18 17:27:00,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:27:00,558 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:27:00,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:27:00,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1736962956, now seen corresponding path program 7 times [2023-02-18 17:27:00,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:27:00,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803550743] [2023-02-18 17:27:00,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:27:00,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:27:00,565 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:27:00,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1693882646] [2023-02-18 17:27:00,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 17:27:00,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:27:00,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:27:00,567 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:27:00,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-18 17:27:00,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:27:00,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 81 conjunts are in the unsatisfiable core [2023-02-18 17:27:00,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:27:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 64 proven. 215 refuted. 0 times theorem prover too weak. 1999 trivial. 0 not checked. [2023-02-18 17:27:00,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:27:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 64 proven. 206 refuted. 0 times theorem prover too weak. 2008 trivial. 0 not checked. [2023-02-18 17:27:02,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:27:02,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803550743] [2023-02-18 17:27:02,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:27:02,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693882646] [2023-02-18 17:27:02,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693882646] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:27:02,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:27:02,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2023-02-18 17:27:02,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696998041] [2023-02-18 17:27:02,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:27:02,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-18 17:27:02,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:27:02,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-18 17:27:02,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2023-02-18 17:27:02,645 INFO L87 Difference]: Start difference. First operand 5060 states and 7009 transitions. Second operand has 35 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 32 states have internal predecessors, (88), 22 states have call successors, (73), 3 states have call predecessors, (73), 2 states have return successors, (72), 20 states have call predecessors, (72), 20 states have call successors, (72) [2023-02-18 17:27:35,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:28:22,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:28:29,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:28:32,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:28:36,470 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 [] [2023-02-18 17:28:43,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:28:43,604 INFO L93 Difference]: Finished difference Result 5951 states and 8489 transitions. [2023-02-18 17:28:43,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-02-18 17:28:43,605 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 32 states have internal predecessors, (88), 22 states have call successors, (73), 3 states have call predecessors, (73), 2 states have return successors, (72), 20 states have call predecessors, (72), 20 states have call successors, (72) Word has length 222 [2023-02-18 17:28:43,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:28:43,641 INFO L225 Difference]: With dead ends: 5951 [2023-02-18 17:28:43,642 INFO L226 Difference]: Without dead ends: 5935 [2023-02-18 17:28:43,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3720 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=2284, Invalid=10598, Unknown=0, NotChecked=0, Total=12882 [2023-02-18 17:28:43,644 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 569 mSDsluCounter, 1862 mSDsCounter, 0 mSdLazyCounter, 5082 mSolverCounterSat, 828 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 2135 SdHoareTripleChecker+Invalid, 5911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 828 IncrementalHoareTripleChecker+Valid, 5082 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.2s IncrementalHoareTripleChecker+Time [2023-02-18 17:28:43,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 2135 Invalid, 5911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [828 Valid, 5082 Invalid, 1 Unknown, 0 Unchecked, 67.2s Time] [2023-02-18 17:28:43,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5935 states. [2023-02-18 17:28:51,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5935 to 5440. [2023-02-18 17:28:51,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5440 states, 3314 states have (on average 1.244115872057936) internal successors, (4123), 3350 states have internal predecessors, (4123), 1775 states have call successors, (1775), 351 states have call predecessors, (1775), 350 states have return successors, (1771), 1738 states have call predecessors, (1771), 1771 states have call successors, (1771) [2023-02-18 17:28:51,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5440 states to 5440 states and 7669 transitions. [2023-02-18 17:28:51,231 INFO L78 Accepts]: Start accepts. Automaton has 5440 states and 7669 transitions. Word has length 222 [2023-02-18 17:28:51,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:28:51,232 INFO L495 AbstractCegarLoop]: Abstraction has 5440 states and 7669 transitions. [2023-02-18 17:28:51,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 32 states have internal predecessors, (88), 22 states have call successors, (73), 3 states have call predecessors, (73), 2 states have return successors, (72), 20 states have call predecessors, (72), 20 states have call successors, (72) [2023-02-18 17:28:51,232 INFO L276 IsEmpty]: Start isEmpty. Operand 5440 states and 7669 transitions. [2023-02-18 17:28:51,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2023-02-18 17:28:51,235 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:28:51,235 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:28:51,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-02-18 17:28:51,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-02-18 17:28:51,440 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:28:51,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:28:51,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1296892370, now seen corresponding path program 8 times [2023-02-18 17:28:51,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:28:51,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807360753] [2023-02-18 17:28:51,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:28:51,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:28:51,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:28:51,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443517588] [2023-02-18 17:28:51,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 17:28:51,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:28:51,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:28:51,451 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:28:51,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-18 17:28:51,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 17:28:51,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:28:51,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 95 conjunts are in the unsatisfiable core [2023-02-18 17:28:51,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:28:51,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2289 backedges. 67 proven. 223 refuted. 0 times theorem prover too weak. 1999 trivial. 0 not checked. [2023-02-18 17:28:51,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:29:01,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2289 backedges. 64 proven. 217 refuted. 0 times theorem prover too weak. 2008 trivial. 0 not checked. [2023-02-18 17:29:01,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:29:01,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807360753] [2023-02-18 17:29:01,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:29:01,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443517588] [2023-02-18 17:29:01,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443517588] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:29:01,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:29:01,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2023-02-18 17:29:01,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096933758] [2023-02-18 17:29:01,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:29:01,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-18 17:29:01,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:29:01,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-18 17:29:01,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 17:29:01,018 INFO L87 Difference]: Start difference. First operand 5440 states and 7669 transitions. Second operand has 37 states, 35 states have (on average 2.742857142857143) internal successors, (96), 34 states have internal predecessors, (96), 21 states have call successors, (72), 3 states have call predecessors, (72), 2 states have return successors, (71), 20 states have call predecessors, (71), 19 states have call successors, (71)