./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.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/egcd3-ll_valuebound5.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 1aca3c96522e618238f11f200c96e0ec490e756d4e04895bd2a51f9a4ff85af1 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 17:26:47,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 17:26:47,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 17:26:47,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 17:26:47,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 17:26:47,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 17:26:47,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 17:26:47,998 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 17:26:47,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 17:26:48,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 17:26:48,004 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 17:26:48,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 17:26:48,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 17:26:48,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 17:26:48,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 17:26:48,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 17:26:48,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 17:26:48,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 17:26:48,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 17:26:48,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 17:26:48,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 17:26:48,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 17:26:48,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 17:26:48,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 17:26:48,025 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 17:26:48,025 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 17:26:48,025 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 17:26:48,026 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 17:26:48,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 17:26:48,027 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 17:26:48,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 17:26:48,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 17:26:48,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 17:26:48,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 17:26:48,031 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 17:26:48,031 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 17:26:48,032 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 17:26:48,032 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 17:26:48,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 17:26:48,033 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 17:26:48,034 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 17:26:48,035 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 17:26:48,057 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 17:26:48,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 17:26:48,058 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 17:26:48,058 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 17:26:48,059 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 17:26:48,059 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 17:26:48,059 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 17:26:48,059 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 17:26:48,059 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 17:26:48,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 17:26:48,060 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 17:26:48,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 17:26:48,060 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 17:26:48,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 17:26:48,061 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 17:26:48,061 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 17:26:48,061 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 17:26:48,061 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 17:26:48,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 17:26:48,061 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 17:26:48,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 17:26:48,062 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 17:26:48,062 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 17:26:48,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 17:26:48,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 17:26:48,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 17:26:48,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 17:26:48,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 17:26:48,063 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 17:26:48,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 17:26:48,063 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 17:26:48,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 17:26:48,063 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 17:26:48,063 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 17:26:48,064 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 17:26:48,064 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1aca3c96522e618238f11f200c96e0ec490e756d4e04895bd2a51f9a4ff85af1 [2023-02-18 17:26:48,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 17:26:48,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 17:26:48,295 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 17:26:48,296 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 17:26:48,296 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 17:26:48,297 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c [2023-02-18 17:26:49,255 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 17:26:49,408 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 17:26:49,409 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c [2023-02-18 17:26:49,413 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f298e4ecf/919bc97a4cd448149a14c3a4069d53d6/FLAG70ae34a72 [2023-02-18 17:26:49,426 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f298e4ecf/919bc97a4cd448149a14c3a4069d53d6 [2023-02-18 17:26:49,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 17:26:49,429 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 17:26:49,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 17:26:49,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 17:26:49,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 17:26:49,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 05:26:49" (1/1) ... [2023-02-18 17:26:49,435 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cfca277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:26:49, skipping insertion in model container [2023-02-18 17:26:49,435 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 05:26:49" (1/1) ... [2023-02-18 17:26:49,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 17:26:49,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 17:26:49,586 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/egcd3-ll_valuebound5.c[490,503] [2023-02-18 17:26:49,612 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 17:26:49,618 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 17:26:49,627 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/egcd3-ll_valuebound5.c[490,503] [2023-02-18 17:26:49,632 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 17:26:49,641 INFO L208 MainTranslator]: Completed translation [2023-02-18 17:26:49,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:26:49 WrapperNode [2023-02-18 17:26:49,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 17:26:49,643 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 17:26:49,643 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 17:26:49,643 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 17:26:49,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:26:49" (1/1) ... [2023-02-18 17:26:49,653 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:26:49" (1/1) ... [2023-02-18 17:26:49,671 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2023-02-18 17:26:49,671 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 17:26:49,672 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 17:26:49,672 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 17:26:49,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 17:26:49,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:26:49" (1/1) ... [2023-02-18 17:26:49,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:26:49" (1/1) ... [2023-02-18 17:26:49,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:26:49" (1/1) ... [2023-02-18 17:26:49,688 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:26:49" (1/1) ... [2023-02-18 17:26:49,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:26:49" (1/1) ... [2023-02-18 17:26:49,696 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:26:49" (1/1) ... [2023-02-18 17:26:49,698 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:26:49" (1/1) ... [2023-02-18 17:26:49,705 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:26:49" (1/1) ... [2023-02-18 17:26:49,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 17:26:49,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 17:26:49,707 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 17:26:49,707 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 17:26:49,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:26:49" (1/1) ... [2023-02-18 17:26:49,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 17:26:49,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:26:49,741 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 17:26:49,758 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 17:26:49,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 17:26:49,772 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-18 17:26:49,772 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-18 17:26:49,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 17:26:49,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 17:26:49,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 17:26:49,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 17:26:49,773 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 17:26:49,813 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 17:26:49,814 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 17:26:49,913 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 17:26:49,917 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 17:26:49,917 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-18 17:26:49,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:26:49 BoogieIcfgContainer [2023-02-18 17:26:49,919 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 17:26:49,920 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 17:26:49,920 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 17:26:49,922 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 17:26:49,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 05:26:49" (1/3) ... [2023-02-18 17:26:49,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362678ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 05:26:49, skipping insertion in model container [2023-02-18 17:26:49,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:26:49" (2/3) ... [2023-02-18 17:26:49,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362678ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 05:26:49, skipping insertion in model container [2023-02-18 17:26:49,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:26:49" (3/3) ... [2023-02-18 17:26:49,924 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound5.c [2023-02-18 17:26:49,950 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 17:26:49,950 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 17:26:49,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 17:26:50,021 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;@51cc2812, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 17:26:50,022 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 17:26:50,025 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-18 17:26:50,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 17:26:50,031 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:26:50,031 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 17:26:50,032 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:26:50,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:26:50,040 INFO L85 PathProgramCache]: Analyzing trace with hash 872320404, now seen corresponding path program 1 times [2023-02-18 17:26:50,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:26:50,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746462066] [2023-02-18 17:26:50,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:26:50,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:26:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:26:50,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:26:50,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746462066] [2023-02-18 17:26:50,163 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 17:26:50,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129624167] [2023-02-18 17:26:50,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:26:50,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:26:50,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:26:50,205 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 17:26:50,206 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 17:26:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:26:50,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 17:26:50,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:26:50,294 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 17:26:50,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:26:50,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129624167] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:26:50,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:26:50,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 17:26:50,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278910553] [2023-02-18 17:26:50,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:26:50,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 17:26:50,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:26:50,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 17:26:50,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 17:26:50,320 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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 17:26:50,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:26:50,335 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2023-02-18 17:26:50,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 17:26:50,337 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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 29 [2023-02-18 17:26:50,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:26:50,342 INFO L225 Difference]: With dead ends: 67 [2023-02-18 17:26:50,342 INFO L226 Difference]: Without dead ends: 31 [2023-02-18 17:26:50,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 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 17:26:50,346 INFO L413 NwaCegarLoop]: 44 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, 44 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 17:26:50,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:26:50,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-18 17:26:50,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-18 17:26:50,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 17:26:50,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2023-02-18 17:26:50,376 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2023-02-18 17:26:50,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:26:50,377 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2023-02-18 17:26:50,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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 17:26:50,378 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2023-02-18 17:26:50,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 17:26:50,379 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:26:50,380 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 17:26:50,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 17:26:50,585 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 17:26:50,585 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:26:50,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:26:50,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1714405113, now seen corresponding path program 1 times [2023-02-18 17:26:50,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:26:50,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273288180] [2023-02-18 17:26:50,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:26:50,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:26:50,603 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:26:50,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614234971] [2023-02-18 17:26:50,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:26:50,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:26:50,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:26:50,605 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 17:26:50,606 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 17:26:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:26:50,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 17:26:50,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:26:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 17:26:50,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:26:50,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:26:50,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273288180] [2023-02-18 17:26:50,713 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:26:50,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614234971] [2023-02-18 17:26:50,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614234971] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:26:50,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:26:50,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 17:26:50,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672434648] [2023-02-18 17:26:50,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:26:50,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 17:26:50,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:26:50,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 17:26:50,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 17:26:50,719 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 17:26:50,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:26:50,801 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2023-02-18 17:26:50,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:26:50,802 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2023-02-18 17:26:50,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:26:50,803 INFO L225 Difference]: With dead ends: 50 [2023-02-18 17:26:50,803 INFO L226 Difference]: Without dead ends: 43 [2023-02-18 17:26:50,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-18 17:26:50,804 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 32 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:26:50,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 113 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:26:50,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-18 17:26:50,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2023-02-18 17:26:50,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 17:26:50,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2023-02-18 17:26:50,811 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2023-02-18 17:26:50,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:26:50,812 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2023-02-18 17:26:50,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 17:26:50,812 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2023-02-18 17:26:50,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-18 17:26:50,813 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:26:50,813 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, 1] [2023-02-18 17:26:50,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 17:26:51,017 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 17:26:51,017 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:26:51,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:26:51,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1825736765, now seen corresponding path program 1 times [2023-02-18 17:26:51,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:26:51,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149373898] [2023-02-18 17:26:51,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:26:51,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:26:51,031 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:26:51,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688048245] [2023-02-18 17:26:51,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:26:51,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:26:51,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:26:51,035 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 17:26:51,037 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 17:26:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:26:51,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 17:26:51,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:26:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 17:26:51,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:26:51,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:26:51,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149373898] [2023-02-18 17:26:51,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:26:51,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688048245] [2023-02-18 17:26:51,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688048245] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:26:51,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:26:51,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 17:26:51,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726763215] [2023-02-18 17:26:51,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:26:51,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 17:26:51,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:26:51,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 17:26:51,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-18 17:26:51,116 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 17:26:51,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:26:51,198 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2023-02-18 17:26:51,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 17:26:51,198 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2023-02-18 17:26:51,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:26:51,202 INFO L225 Difference]: With dead ends: 49 [2023-02-18 17:26:51,202 INFO L226 Difference]: Without dead ends: 47 [2023-02-18 17:26:51,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-18 17:26:51,205 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 23 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:26:51,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 161 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:26:51,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-18 17:26:51,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2023-02-18 17:26:51,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-18 17:26:51,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-02-18 17:26:51,216 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2023-02-18 17:26:51,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:26:51,216 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-02-18 17:26:51,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 17:26:51,217 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-02-18 17:26:51,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 17:26:51,217 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:26:51,218 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 17:26:51,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 17:26:51,422 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 17:26:51,422 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:26:51,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:26:51,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1547103247, now seen corresponding path program 1 times [2023-02-18 17:26:51,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:26:51,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067803099] [2023-02-18 17:26:51,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:26:51,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:26:51,435 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:26:51,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751490637] [2023-02-18 17:26:51,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:26:51,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:26:51,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:26:51,441 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 17:26:51,458 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 17:26:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:26:51,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 17:26:51,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:26:51,556 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 17:26:51,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:26:51,611 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 17:26:51,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:26:51,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067803099] [2023-02-18 17:26:51,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:26:51,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751490637] [2023-02-18 17:26:51,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751490637] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:26:51,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:26:51,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-18 17:26:51,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15599739] [2023-02-18 17:26:51,612 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:26:51,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 17:26:51,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:26:51,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 17:26:51,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-18 17:26:51,615 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 17:26:51,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:26:51,752 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2023-02-18 17:26:51,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 17:26:51,752 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-02-18 17:26:51,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:26:51,753 INFO L225 Difference]: With dead ends: 99 [2023-02-18 17:26:51,753 INFO L226 Difference]: Without dead ends: 92 [2023-02-18 17:26:51,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-18 17:26:51,754 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 61 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:26:51,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 242 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:26:51,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-18 17:26:51,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2023-02-18 17:26:51,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-18 17:26:51,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2023-02-18 17:26:51,776 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2023-02-18 17:26:51,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:26:51,776 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2023-02-18 17:26:51,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 17:26:51,777 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2023-02-18 17:26:51,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 17:26:51,779 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:26:51,779 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, 1] [2023-02-18 17:26:51,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 17:26:51,983 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 17:26:51,983 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:26:51,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:26:51,984 INFO L85 PathProgramCache]: Analyzing trace with hash -720434099, now seen corresponding path program 1 times [2023-02-18 17:26:51,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:26:51,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883628124] [2023-02-18 17:26:51,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:26:51,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:26:51,998 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:26:52,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671890970] [2023-02-18 17:26:52,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:26:52,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:26:52,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:26:52,004 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 17:26:52,005 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 17:26:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:26:52,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 17:26:52,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:26:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 17:26:52,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:26:52,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:26:52,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883628124] [2023-02-18 17:26:52,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:26:52,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671890970] [2023-02-18 17:26:52,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671890970] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:26:52,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:26:52,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-02-18 17:26:52,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799651893] [2023-02-18 17:26:52,144 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:26:52,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 17:26:52,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:26:52,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 17:26:52,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-18 17:26:52,145 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 17:26:52,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:26:52,204 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2023-02-18 17:26:52,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 17:26:52,205 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2023-02-18 17:26:52,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:26:52,206 INFO L225 Difference]: With dead ends: 75 [2023-02-18 17:26:52,206 INFO L226 Difference]: Without dead ends: 73 [2023-02-18 17:26:52,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-18 17:26:52,207 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:26:52,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 145 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:26:52,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-02-18 17:26:52,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2023-02-18 17:26:52,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-18 17:26:52,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2023-02-18 17:26:52,214 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 38 [2023-02-18 17:26:52,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:26:52,215 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2023-02-18 17:26:52,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 17:26:52,215 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2023-02-18 17:26:52,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 17:26:52,216 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:26:52,216 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-18 17:26:52,222 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 17:26:52,420 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 17:26:52,420 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:26:52,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:26:52,421 INFO L85 PathProgramCache]: Analyzing trace with hash -376152117, now seen corresponding path program 1 times [2023-02-18 17:26:52,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:26:52,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594857661] [2023-02-18 17:26:52,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:26:52,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:26:52,430 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:26:52,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916466789] [2023-02-18 17:26:52,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:26:52,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:26:52,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:26:52,432 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 17:26:52,434 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 17:26:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:26:52,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-18 17:26:52,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:26:52,525 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 17:26:52,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:26:52,579 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 17:26:52,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:26:52,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594857661] [2023-02-18 17:26:52,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:26:52,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916466789] [2023-02-18 17:26:52,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916466789] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:26:52,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:26:52,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2023-02-18 17:26:52,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569674079] [2023-02-18 17:26:52,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:26:52,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 17:26:52,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:26:52,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 17:26:52,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-02-18 17:26:52,582 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-18 17:26:52,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:26:52,903 INFO L93 Difference]: Finished difference Result 114 states and 155 transitions. [2023-02-18 17:26:52,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 17:26:52,904 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 38 [2023-02-18 17:26:52,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:26:52,905 INFO L225 Difference]: With dead ends: 114 [2023-02-18 17:26:52,905 INFO L226 Difference]: Without dead ends: 112 [2023-02-18 17:26:52,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2023-02-18 17:26:52,906 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 96 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 17:26:52,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 312 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 17:26:52,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-18 17:26:52,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 101. [2023-02-18 17:26:52,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 71 states have internal predecessors, (88), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-02-18 17:26:52,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 137 transitions. [2023-02-18 17:26:52,919 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 137 transitions. Word has length 38 [2023-02-18 17:26:52,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:26:52,919 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 137 transitions. [2023-02-18 17:26:52,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-18 17:26:52,919 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 137 transitions. [2023-02-18 17:26:52,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 17:26:52,920 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:26:52,920 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, 1] [2023-02-18 17:26:52,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 17:26:53,125 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 17:26:53,125 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:26:53,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:26:53,125 INFO L85 PathProgramCache]: Analyzing trace with hash 279172547, now seen corresponding path program 1 times [2023-02-18 17:26:53,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:26:53,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530615506] [2023-02-18 17:26:53,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:26:53,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:26:53,134 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:26:53,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205379341] [2023-02-18 17:26:53,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:26:53,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:26:53,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:26:53,138 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 17:26:53,139 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 17:26:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:26:53,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 17:26:53,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:26:53,247 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 17:26:53,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:26:55,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:26:55,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530615506] [2023-02-18 17:26:55,296 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:26:55,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205379341] [2023-02-18 17:26:55,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205379341] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:26:55,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:26:55,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-02-18 17:26:55,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831663723] [2023-02-18 17:26:55,297 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:26:55,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 17:26:55,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:26:55,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 17:26:55,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=171, Unknown=1, NotChecked=0, Total=210 [2023-02-18 17:26:55,298 INFO L87 Difference]: Start difference. First operand 101 states and 137 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 17:26:55,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:26:55,502 INFO L93 Difference]: Finished difference Result 114 states and 154 transitions. [2023-02-18 17:26:55,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 17:26:55,502 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2023-02-18 17:26:55,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:26:55,503 INFO L225 Difference]: With dead ends: 114 [2023-02-18 17:26:55,503 INFO L226 Difference]: Without dead ends: 112 [2023-02-18 17:26:55,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=55, Invalid=250, Unknown=1, NotChecked=0, Total=306 [2023-02-18 17:26:55,504 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 34 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 17:26:55,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 156 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 17:26:55,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-18 17:26:55,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2023-02-18 17:26:55,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 76 states have internal predecessors, (94), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2023-02-18 17:26:55,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 151 transitions. [2023-02-18 17:26:55,516 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 151 transitions. Word has length 43 [2023-02-18 17:26:55,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:26:55,517 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 151 transitions. [2023-02-18 17:26:55,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 17:26:55,517 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 151 transitions. [2023-02-18 17:26:55,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 17:26:55,518 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:26:55,518 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 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] [2023-02-18 17:26:55,524 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 17:26:55,722 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 17:26:55,723 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:26:55,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:26:55,723 INFO L85 PathProgramCache]: Analyzing trace with hash -2141198011, now seen corresponding path program 1 times [2023-02-18 17:26:55,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:26:55,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011731916] [2023-02-18 17:26:55,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:26:55,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:26:55,733 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:26:55,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619801451] [2023-02-18 17:26:55,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:26:55,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:26:55,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:26:55,740 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 17:26:55,757 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 17:26:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:26:55,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-18 17:26:55,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:26:55,865 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 17:26:55,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:26:55,976 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 17:26:55,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:26:55,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011731916] [2023-02-18 17:26:55,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:26:55,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619801451] [2023-02-18 17:26:55,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619801451] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:26:55,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:26:55,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 19 [2023-02-18 17:26:55,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313754804] [2023-02-18 17:26:55,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:26:55,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 17:26:55,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:26:55,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 17:26:55,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-02-18 17:26:55,979 INFO L87 Difference]: Start difference. First operand 111 states and 151 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 17 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-18 17:26:59,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:26:59,410 INFO L93 Difference]: Finished difference Result 182 states and 255 transitions. [2023-02-18 17:26:59,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 17:26:59,411 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 17 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 43 [2023-02-18 17:26:59,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:26:59,415 INFO L225 Difference]: With dead ends: 182 [2023-02-18 17:26:59,415 INFO L226 Difference]: Without dead ends: 180 [2023-02-18 17:26:59,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=211, Invalid=911, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 17:26:59,417 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 190 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-02-18 17:26:59,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 186 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-02-18 17:26:59,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-02-18 17:26:59,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 141. [2023-02-18 17:26:59,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 98 states have (on average 1.2448979591836735) internal successors, (122), 102 states have internal predecessors, (122), 35 states have call successors, (35), 7 states have call predecessors, (35), 7 states have return successors, (34), 31 states have call predecessors, (34), 34 states have call successors, (34) [2023-02-18 17:26:59,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 191 transitions. [2023-02-18 17:26:59,459 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 191 transitions. Word has length 43 [2023-02-18 17:26:59,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:26:59,460 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 191 transitions. [2023-02-18 17:26:59,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 17 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-18 17:26:59,460 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 191 transitions. [2023-02-18 17:26:59,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 17:26:59,463 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:26:59,463 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:26:59,467 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 17:26:59,670 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 17:26:59,670 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:26:59,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:26:59,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1796916029, now seen corresponding path program 2 times [2023-02-18 17:26:59,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:26:59,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308196634] [2023-02-18 17:26:59,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:26:59,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:26:59,704 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:26:59,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743932771] [2023-02-18 17:26:59,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 17:26:59,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:26:59,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:26:59,712 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 17:26:59,718 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 17:26:59,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 17:26:59,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:26:59,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 17:26:59,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:26:59,780 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 17:26:59,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:26:59,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:26:59,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308196634] [2023-02-18 17:26:59,780 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:26:59,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743932771] [2023-02-18 17:26:59,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743932771] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:26:59,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:26:59,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 17:26:59,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636765213] [2023-02-18 17:26:59,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:26:59,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 17:26:59,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:26:59,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 17:26:59,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 17:26:59,782 INFO L87 Difference]: Start difference. First operand 141 states and 191 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 17:26:59,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:26:59,851 INFO L93 Difference]: Finished difference Result 195 states and 270 transitions. [2023-02-18 17:26:59,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:26:59,852 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 43 [2023-02-18 17:26:59,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:26:59,852 INFO L225 Difference]: With dead ends: 195 [2023-02-18 17:26:59,853 INFO L226 Difference]: Without dead ends: 132 [2023-02-18 17:26:59,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 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 17:26:59,854 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 19 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:26:59,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 139 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:26:59,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-02-18 17:26:59,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 97. [2023-02-18 17:26:59,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 64 states have (on average 1.171875) internal successors, (75), 67 states have internal predecessors, (75), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2023-02-18 17:26:59,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 124 transitions. [2023-02-18 17:26:59,873 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 124 transitions. Word has length 43 [2023-02-18 17:26:59,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:26:59,873 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 124 transitions. [2023-02-18 17:26:59,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 17:26:59,873 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 124 transitions. [2023-02-18 17:26:59,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-18 17:26:59,874 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:26:59,874 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, 1] [2023-02-18 17:26:59,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-18 17:27:00,078 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 17:27:00,079 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:27:00,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:27:00,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1189241395, now seen corresponding path program 1 times [2023-02-18 17:27:00,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:27:00,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211798515] [2023-02-18 17:27:00,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:27:00,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:27:00,086 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:27:00,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1736070768] [2023-02-18 17:27:00,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:27:00,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:27:00,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:27:00,087 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 17:27:00,099 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 17:27:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:27:00,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 17:27:00,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:27:00,145 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 17:27:00,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:27:00,158 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 17:27:00,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:27:00,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211798515] [2023-02-18 17:27:00,159 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:27:00,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736070768] [2023-02-18 17:27:00,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736070768] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 17:27:00,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:27:00,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-02-18 17:27:00,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632453040] [2023-02-18 17:27:00,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:27:00,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 17:27:00,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:27:00,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 17:27:00,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-18 17:27:00,161 INFO L87 Difference]: Start difference. First operand 97 states and 124 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-18 17:27:00,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:27:00,200 INFO L93 Difference]: Finished difference Result 103 states and 129 transitions. [2023-02-18 17:27:00,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:27:00,201 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2023-02-18 17:27:00,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:27:00,202 INFO L225 Difference]: With dead ends: 103 [2023-02-18 17:27:00,202 INFO L226 Difference]: Without dead ends: 101 [2023-02-18 17:27:00,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-18 17:27:00,203 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:27:00,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 122 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:27:00,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-18 17:27:00,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-02-18 17:27:00,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 67 states have (on average 1.164179104477612) internal successors, (78), 70 states have internal predecessors, (78), 25 states have call successors, (25), 8 states have call predecessors, (25), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2023-02-18 17:27:00,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 127 transitions. [2023-02-18 17:27:00,215 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 127 transitions. Word has length 48 [2023-02-18 17:27:00,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:27:00,216 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 127 transitions. [2023-02-18 17:27:00,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-18 17:27:00,216 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 127 transitions. [2023-02-18 17:27:00,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-18 17:27:00,217 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:27:00,217 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1] [2023-02-18 17:27:00,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-18 17:27:00,420 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 17:27:00,421 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:27:00,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:27:00,421 INFO L85 PathProgramCache]: Analyzing trace with hash 145642443, now seen corresponding path program 1 times [2023-02-18 17:27:00,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:27:00,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239733835] [2023-02-18 17:27:00,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:27:00,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:27:00,428 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:27:00,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696074697] [2023-02-18 17:27:00,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:27:00,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:27:00,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:27:00,430 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 17:27:00,431 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 17:27:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:27:00,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 17:27:00,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:27:00,537 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 17:27:00,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:27:02,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:27:02,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239733835] [2023-02-18 17:27:02,578 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:27:02,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696074697] [2023-02-18 17:27:02,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696074697] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:27:02,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:27:02,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-02-18 17:27:02,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678966097] [2023-02-18 17:27:02,578 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:27:02,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 17:27:02,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:27:02,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 17:27:02,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=227, Unknown=1, NotChecked=0, Total=272 [2023-02-18 17:27:02,580 INFO L87 Difference]: Start difference. First operand 101 states and 127 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 17:27:02,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:27:02,913 INFO L93 Difference]: Finished difference Result 150 states and 200 transitions. [2023-02-18 17:27:02,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 17:27:02,913 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2023-02-18 17:27:02,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:27:02,914 INFO L225 Difference]: With dead ends: 150 [2023-02-18 17:27:02,914 INFO L226 Difference]: Without dead ends: 148 [2023-02-18 17:27:02,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=92, Invalid=459, Unknown=1, NotChecked=0, Total=552 [2023-02-18 17:27:02,916 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 60 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 17:27:02,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 193 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 17:27:02,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-02-18 17:27:02,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 111. [2023-02-18 17:27:02,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 75 states have internal predecessors, (84), 29 states have call successors, (29), 9 states have call predecessors, (29), 9 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2023-02-18 17:27:02,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 141 transitions. [2023-02-18 17:27:02,932 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 141 transitions. Word has length 48 [2023-02-18 17:27:02,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:27:02,932 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 141 transitions. [2023-02-18 17:27:02,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 17:27:02,932 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 141 transitions. [2023-02-18 17:27:02,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-18 17:27:02,933 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:27:02,933 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, 1, 1, 1] [2023-02-18 17:27:02,951 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 17:27:03,137 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 17:27:03,138 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:27:03,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:27:03,138 INFO L85 PathProgramCache]: Analyzing trace with hash -828341661, now seen corresponding path program 1 times [2023-02-18 17:27:03,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:27:03,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968970992] [2023-02-18 17:27:03,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:27:03,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:27:03,145 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:27:03,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533655117] [2023-02-18 17:27:03,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:27:03,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:27:03,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:27:03,146 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 17:27:03,148 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 17:27:03,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:27:03,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-18 17:27:03,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:27:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 17:27:03,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:27:03,701 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-18 17:27:03,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:27:03,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968970992] [2023-02-18 17:27:03,703 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:27:03,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533655117] [2023-02-18 17:27:03,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533655117] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:27:03,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:27:03,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-02-18 17:27:03,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124689353] [2023-02-18 17:27:03,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:27:03,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 17:27:03,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:27:03,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 17:27:03,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-02-18 17:27:03,706 INFO L87 Difference]: Start difference. First operand 111 states and 141 transitions. Second operand has 26 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-18 17:27:11,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:27:11,468 INFO L93 Difference]: Finished difference Result 318 states and 438 transitions. [2023-02-18 17:27:11,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-18 17:27:11,469 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 60 [2023-02-18 17:27:11,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:27:11,470 INFO L225 Difference]: With dead ends: 318 [2023-02-18 17:27:11,470 INFO L226 Difference]: Without dead ends: 246 [2023-02-18 17:27:11,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=497, Invalid=2365, Unknown=0, NotChecked=0, Total=2862 [2023-02-18 17:27:11,471 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 178 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-02-18 17:27:11,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 262 Invalid, 1744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2023-02-18 17:27:11,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-02-18 17:27:11,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 197. [2023-02-18 17:27:11,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 132 states have (on average 1.1818181818181819) internal successors, (156), 134 states have internal predecessors, (156), 51 states have call successors, (51), 13 states have call predecessors, (51), 13 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2023-02-18 17:27:11,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 257 transitions. [2023-02-18 17:27:11,533 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 257 transitions. Word has length 60 [2023-02-18 17:27:11,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:27:11,534 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 257 transitions. [2023-02-18 17:27:11,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-18 17:27:11,534 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 257 transitions. [2023-02-18 17:27:11,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-18 17:27:11,535 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:27:11,535 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1] [2023-02-18 17:27:11,539 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 17:27:11,739 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 17:27:11,739 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:27:11,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:27:11,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1439093215, now seen corresponding path program 1 times [2023-02-18 17:27:11,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:27:11,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550422241] [2023-02-18 17:27:11,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:27:11,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:27:11,748 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:27:11,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789158168] [2023-02-18 17:27:11,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:27:11,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:27:11,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:27:11,750 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 17:27:11,751 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 17:27:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:27:11,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 17:27:11,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:27:12,011 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 17:27:12,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:27:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-02-18 17:27:12,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:27:12,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550422241] [2023-02-18 17:27:12,292 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:27:12,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789158168] [2023-02-18 17:27:12,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789158168] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:27:12,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:27:12,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 23 [2023-02-18 17:27:12,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856247696] [2023-02-18 17:27:12,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:27:12,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 17:27:12,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:27:12,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 17:27:12,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2023-02-18 17:27:12,294 INFO L87 Difference]: Start difference. First operand 197 states and 257 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 19 states have internal predecessors, (61), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-18 17:27:25,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:27:25,651 INFO L93 Difference]: Finished difference Result 310 states and 427 transitions. [2023-02-18 17:27:25,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-18 17:27:25,652 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 19 states have internal predecessors, (61), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 68 [2023-02-18 17:27:25,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:27:25,654 INFO L225 Difference]: With dead ends: 310 [2023-02-18 17:27:25,654 INFO L226 Difference]: Without dead ends: 308 [2023-02-18 17:27:25,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=424, Invalid=2126, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 17:27:25,655 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 153 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:27:25,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 308 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2023-02-18 17:27:25,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2023-02-18 17:27:25,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 205. [2023-02-18 17:27:25,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 138 states have (on average 1.173913043478261) internal successors, (162), 140 states have internal predecessors, (162), 51 states have call successors, (51), 15 states have call predecessors, (51), 15 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2023-02-18 17:27:25,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 263 transitions. [2023-02-18 17:27:25,726 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 263 transitions. Word has length 68 [2023-02-18 17:27:25,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:27:25,726 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 263 transitions. [2023-02-18 17:27:25,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 19 states have internal predecessors, (61), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-18 17:27:25,726 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 263 transitions. [2023-02-18 17:27:25,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-18 17:27:25,727 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:27:25,727 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 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, 1, 1] [2023-02-18 17:27:25,733 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 17:27:25,934 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 17:27:25,934 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:27:25,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:27:25,935 INFO L85 PathProgramCache]: Analyzing trace with hash 798002477, now seen corresponding path program 2 times [2023-02-18 17:27:25,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:27:25,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073342088] [2023-02-18 17:27:25,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:27:25,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:27:25,952 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:27:25,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291888831] [2023-02-18 17:27:25,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 17:27:25,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:27:25,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:27:25,960 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 17:27:25,962 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 17:27:26,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 17:27:26,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:27:26,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 17:27:26,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:27:26,011 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-18 17:27:26,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:27:26,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:27:26,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073342088] [2023-02-18 17:27:26,012 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:27:26,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291888831] [2023-02-18 17:27:26,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291888831] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:27:26,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:27:26,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 17:27:26,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495312483] [2023-02-18 17:27:26,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:27:26,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 17:27:26,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:27:26,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 17:27:26,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 17:27:26,014 INFO L87 Difference]: Start difference. First operand 205 states and 263 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-02-18 17:27:26,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:27:26,127 INFO L93 Difference]: Finished difference Result 358 states and 472 transitions. [2023-02-18 17:27:26,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:27:26,127 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 73 [2023-02-18 17:27:26,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:27:26,128 INFO L225 Difference]: With dead ends: 358 [2023-02-18 17:27:26,129 INFO L226 Difference]: Without dead ends: 244 [2023-02-18 17:27:26,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-18 17:27:26,129 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:27:26,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 123 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:27:26,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-02-18 17:27:26,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 235. [2023-02-18 17:27:26,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 152 states have (on average 1.1644736842105263) internal successors, (177), 154 states have internal predecessors, (177), 67 states have call successors, (67), 15 states have call predecessors, (67), 15 states have return successors, (66), 65 states have call predecessors, (66), 66 states have call successors, (66) [2023-02-18 17:27:26,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 310 transitions. [2023-02-18 17:27:26,208 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 310 transitions. Word has length 73 [2023-02-18 17:27:26,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:27:26,209 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 310 transitions. [2023-02-18 17:27:26,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-02-18 17:27:26,209 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 310 transitions. [2023-02-18 17:27:26,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-18 17:27:26,211 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:27:26,211 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 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, 1, 1] [2023-02-18 17:27:26,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-18 17:27:26,415 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 17:27:26,415 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:27:26,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:27:26,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1419603609, now seen corresponding path program 3 times [2023-02-18 17:27:26,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:27:26,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894560516] [2023-02-18 17:27:26,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:27:26,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:27:26,422 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:27:26,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1931380451] [2023-02-18 17:27:26,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 17:27:26,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:27:26,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:27:26,424 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 17:27:26,426 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 17:27:26,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-18 17:27:26,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:27:26,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 17:27:26,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:27:26,470 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-18 17:27:26,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:27:26,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:27:26,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894560516] [2023-02-18 17:27:26,471 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:27:26,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931380451] [2023-02-18 17:27:26,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931380451] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:27:26,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:27:26,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 17:27:26,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800168232] [2023-02-18 17:27:26,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:27:26,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 17:27:26,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:27:26,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 17:27:26,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-18 17:27:26,472 INFO L87 Difference]: Start difference. First operand 235 states and 310 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-02-18 17:27:26,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:27:26,619 INFO L93 Difference]: Finished difference Result 266 states and 358 transitions. [2023-02-18 17:27:26,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 17:27:26,620 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 73 [2023-02-18 17:27:26,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:27:26,621 INFO L225 Difference]: With dead ends: 266 [2023-02-18 17:27:26,621 INFO L226 Difference]: Without dead ends: 264 [2023-02-18 17:27:26,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-18 17:27:26,622 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:27:26,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 151 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:27:26,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2023-02-18 17:27:26,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 260. [2023-02-18 17:27:26,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 162 states have (on average 1.1790123456790123) internal successors, (191), 163 states have internal predecessors, (191), 81 states have call successors, (81), 16 states have call predecessors, (81), 16 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-02-18 17:27:26,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 352 transitions. [2023-02-18 17:27:26,715 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 352 transitions. Word has length 73 [2023-02-18 17:27:26,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:27:26,716 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 352 transitions. [2023-02-18 17:27:26,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-02-18 17:27:26,716 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 352 transitions. [2023-02-18 17:27:26,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-18 17:27:26,716 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:27:26,717 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 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, 1] [2023-02-18 17:27:26,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-18 17:27:26,920 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 17:27:26,921 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:27:26,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:27:26,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1622368081, now seen corresponding path program 4 times [2023-02-18 17:27:26,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:27:26,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258220724] [2023-02-18 17:27:26,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:27:26,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:27:26,927 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:27:26,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [217599931] [2023-02-18 17:27:26,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 17:27:26,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:27:26,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:27:26,928 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 17:27:26,930 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 17:27:26,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 17:27:26,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:27:26,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-18 17:27:26,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:27:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 31 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-18 17:27:27,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:27:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-18 17:27:27,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:27:27,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258220724] [2023-02-18 17:27:27,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:27:27,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217599931] [2023-02-18 17:27:27,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217599931] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:27:27,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:27:27,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2023-02-18 17:27:27,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562580873] [2023-02-18 17:27:27,701 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:27:27,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-18 17:27:27,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:27:27,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-18 17:27:27,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2023-02-18 17:27:27,702 INFO L87 Difference]: Start difference. First operand 260 states and 352 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 25 states have internal predecessors, (60), 7 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2023-02-18 17:27:29,893 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 17:27:37,466 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 17:27:49,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:27:49,337 INFO L93 Difference]: Finished difference Result 399 states and 546 transitions. [2023-02-18 17:27:49,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-18 17:27:49,338 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 25 states have internal predecessors, (60), 7 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 73 [2023-02-18 17:27:49,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:27:49,339 INFO L225 Difference]: With dead ends: 399 [2023-02-18 17:27:49,339 INFO L226 Difference]: Without dead ends: 397 [2023-02-18 17:27:49,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=571, Invalid=2399, Unknown=0, NotChecked=0, Total=2970 [2023-02-18 17:27:49,341 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 232 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 280 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 1913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.7s IncrementalHoareTripleChecker+Time [2023-02-18 17:27:49,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 543 Invalid, 1913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 1631 Invalid, 2 Unknown, 0 Unchecked, 17.7s Time] [2023-02-18 17:27:49,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2023-02-18 17:27:49,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 340. [2023-02-18 17:27:49,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 210 states have (on average 1.1857142857142857) internal successors, (249), 211 states have internal predecessors, (249), 109 states have call successors, (109), 20 states have call predecessors, (109), 20 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2023-02-18 17:27:49,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 466 transitions. [2023-02-18 17:27:49,510 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 466 transitions. Word has length 73 [2023-02-18 17:27:49,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:27:49,510 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 466 transitions. [2023-02-18 17:27:49,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 25 states have internal predecessors, (60), 7 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2023-02-18 17:27:49,510 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 466 transitions. [2023-02-18 17:27:49,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-18 17:27:49,511 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:27:49,511 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 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, 1] [2023-02-18 17:27:49,517 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 17:27:49,715 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 17:27:49,716 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:27:49,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:27:49,716 INFO L85 PathProgramCache]: Analyzing trace with hash 160585404, now seen corresponding path program 1 times [2023-02-18 17:27:49,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:27:49,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240899246] [2023-02-18 17:27:49,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:27:49,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:27:49,730 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:27:49,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70455932] [2023-02-18 17:27:49,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:27:49,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:27:49,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:27:49,736 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 17:27:49,739 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 17:27:49,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:27:49,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 85 conjunts are in the unsatisfiable core [2023-02-18 17:27:49,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:27:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 36 proven. 32 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-02-18 17:27:50,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:27:54,303 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-02-18 17:27:54,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:27:54,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240899246] [2023-02-18 17:27:54,303 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:27:54,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70455932] [2023-02-18 17:27:54,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70455932] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:27:54,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:27:54,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 34 [2023-02-18 17:27:54,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040388172] [2023-02-18 17:27:54,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:27:54,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 17:27:54,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:27:54,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 17:27:54,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=957, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 17:27:54,305 INFO L87 Difference]: Start difference. First operand 340 states and 466 transitions. Second operand has 34 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 10 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2023-02-18 17:28:03,353 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 17:28:20,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:28:20,366 INFO L93 Difference]: Finished difference Result 543 states and 763 transitions. [2023-02-18 17:28:20,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-02-18 17:28:20,367 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 10 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 87 [2023-02-18 17:28:20,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:28:20,369 INFO L225 Difference]: With dead ends: 543 [2023-02-18 17:28:20,369 INFO L226 Difference]: Without dead ends: 535 [2023-02-18 17:28:20,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 136 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2319 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=1479, Invalid=6893, Unknown=0, NotChecked=0, Total=8372 [2023-02-18 17:28:20,371 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 358 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 2532 mSolverCounterSat, 578 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 3111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 578 IncrementalHoareTripleChecker+Valid, 2532 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2023-02-18 17:28:20,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 440 Invalid, 3111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 2532 Invalid, 1 Unknown, 0 Unchecked, 15.9s Time] [2023-02-18 17:28:20,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2023-02-18 17:28:20,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 497. [2023-02-18 17:28:20,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 307 states have (on average 1.205211726384365) internal successors, (370), 308 states have internal predecessors, (370), 165 states have call successors, (165), 24 states have call predecessors, (165), 24 states have return successors, (164), 164 states have call predecessors, (164), 164 states have call successors, (164) [2023-02-18 17:28:20,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 699 transitions. [2023-02-18 17:28:20,778 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 699 transitions. Word has length 87 [2023-02-18 17:28:20,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:28:20,779 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 699 transitions. [2023-02-18 17:28:20,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 10 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2023-02-18 17:28:20,779 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 699 transitions. [2023-02-18 17:28:20,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-02-18 17:28:20,780 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:28:20,780 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 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 17:28:20,784 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 17:28:20,984 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 17:28:20,985 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:28:20,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:28:20,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1330396859, now seen corresponding path program 2 times [2023-02-18 17:28:20,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:28:20,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484405702] [2023-02-18 17:28:20,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:28:20,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:28:20,996 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:28:20,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1847147419] [2023-02-18 17:28:20,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 17:28:20,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:28:20,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:28:20,998 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 17:28:21,032 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 17:28:21,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 17:28:21,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:28:21,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 17:28:21,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:28:21,090 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-02-18 17:28:21,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:28:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-02-18 17:28:21,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:28:21,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484405702] [2023-02-18 17:28:21,140 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:28:21,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847147419] [2023-02-18 17:28:21,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847147419] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:28:21,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:28:21,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2023-02-18 17:28:21,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420932865] [2023-02-18 17:28:21,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:28:21,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 17:28:21,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:28:21,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 17:28:21,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-18 17:28:21,143 INFO L87 Difference]: Start difference. First operand 497 states and 699 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-18 17:28:22,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:28:22,008 INFO L93 Difference]: Finished difference Result 612 states and 863 transitions. [2023-02-18 17:28:22,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 17:28:22,009 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 95 [2023-02-18 17:28:22,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:28:22,011 INFO L225 Difference]: With dead ends: 612 [2023-02-18 17:28:22,011 INFO L226 Difference]: Without dead ends: 605 [2023-02-18 17:28:22,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 179 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2023-02-18 17:28:22,012 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 77 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 17:28:22,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 394 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 17:28:22,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2023-02-18 17:28:22,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 460. [2023-02-18 17:28:22,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 278 states have (on average 1.2122302158273381) internal successors, (337), 279 states have internal predecessors, (337), 157 states have call successors, (157), 24 states have call predecessors, (157), 24 states have return successors, (156), 156 states have call predecessors, (156), 156 states have call successors, (156) [2023-02-18 17:28:22,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 650 transitions. [2023-02-18 17:28:22,395 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 650 transitions. Word has length 95 [2023-02-18 17:28:22,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:28:22,396 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 650 transitions. [2023-02-18 17:28:22,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-18 17:28:22,396 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 650 transitions. [2023-02-18 17:28:22,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-02-18 17:28:22,399 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:28:22,399 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 17:28:22,403 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 17:28:22,603 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 17:28:22,603 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:28:22,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:28:22,604 INFO L85 PathProgramCache]: Analyzing trace with hash 2024025072, now seen corresponding path program 2 times [2023-02-18 17:28:22,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:28:22,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893284501] [2023-02-18 17:28:22,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:28:22,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:28:22,610 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:28:22,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1231103842] [2023-02-18 17:28:22,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 17:28:22,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:28:22,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:28:22,612 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 17:28:22,615 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 17:28:22,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 17:28:22,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:28:22,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-18 17:28:22,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:28:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 53 proven. 43 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-02-18 17:28:22,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:28:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 50 proven. 34 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2023-02-18 17:28:24,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:28:24,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893284501] [2023-02-18 17:28:24,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:28:24,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231103842] [2023-02-18 17:28:24,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231103842] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:28:24,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:28:24,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2023-02-18 17:28:24,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239133052] [2023-02-18 17:28:24,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:28:24,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 17:28:24,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:28:24,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 17:28:24,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 17:28:24,880 INFO L87 Difference]: Start difference. First operand 460 states and 650 transitions. Second operand has 33 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 12 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2023-02-18 17:29:07,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:29:07,391 INFO L93 Difference]: Finished difference Result 738 states and 1040 transitions. [2023-02-18 17:29:07,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-18 17:29:07,391 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 12 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) Word has length 107 [2023-02-18 17:29:07,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:29:07,393 INFO L225 Difference]: With dead ends: 738 [2023-02-18 17:29:07,393 INFO L226 Difference]: Without dead ends: 534 [2023-02-18 17:29:07,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=1318, Invalid=5162, Unknown=0, NotChecked=0, Total=6480 [2023-02-18 17:29:07,395 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 198 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 1829 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 2178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 1829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:29:07,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 331 Invalid, 2178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 1829 Invalid, 0 Unknown, 0 Unchecked, 30.1s Time] [2023-02-18 17:29:07,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2023-02-18 17:29:07,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 491. [2023-02-18 17:29:07,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 292 states have (on average 1.2157534246575343) internal successors, (355), 293 states have internal predecessors, (355), 173 states have call successors, (173), 25 states have call predecessors, (173), 25 states have return successors, (172), 172 states have call predecessors, (172), 172 states have call successors, (172) [2023-02-18 17:29:07,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 700 transitions. [2023-02-18 17:29:07,857 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 700 transitions. Word has length 107 [2023-02-18 17:29:07,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:29:07,858 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 700 transitions. [2023-02-18 17:29:07,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 12 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2023-02-18 17:29:07,858 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 700 transitions. [2023-02-18 17:29:07,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-18 17:29:07,859 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:29:07,859 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:29:07,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-18 17:29:08,063 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 17:29:08,064 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:29:08,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:29:08,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1576994048, now seen corresponding path program 1 times [2023-02-18 17:29:08,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:29:08,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120895576] [2023-02-18 17:29:08,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:29:08,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:29:08,070 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:29:08,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789264324] [2023-02-18 17:29:08,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:29:08,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:29:08,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:29:08,072 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 17:29:08,074 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 17:29:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:29:08,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-18 17:29:08,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:29:08,294 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2023-02-18 17:29:08,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:29:08,518 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2023-02-18 17:29:08,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:29:08,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120895576] [2023-02-18 17:29:08,518 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:29:08,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789264324] [2023-02-18 17:29:08,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789264324] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:29:08,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:29:08,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 27 [2023-02-18 17:29:08,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299837189] [2023-02-18 17:29:08,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:29:08,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 17:29:08,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:29:08,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 17:29:08,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2023-02-18 17:29:08,520 INFO L87 Difference]: Start difference. First operand 491 states and 700 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 24 states have internal predecessors, (62), 10 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 10 states have call predecessors, (36), 10 states have call successors, (36) [2023-02-18 17:29:16,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:29:16,455 INFO L93 Difference]: Finished difference Result 1234 states and 1900 transitions. [2023-02-18 17:29:16,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-02-18 17:29:16,456 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 24 states have internal predecessors, (62), 10 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 10 states have call predecessors, (36), 10 states have call successors, (36) Word has length 120 [2023-02-18 17:29:16,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:29:16,459 INFO L225 Difference]: With dead ends: 1234 [2023-02-18 17:29:16,460 INFO L226 Difference]: Without dead ends: 1128 [2023-02-18 17:29:16,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3897 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2207, Invalid=8923, Unknown=0, NotChecked=0, Total=11130 [2023-02-18 17:29:16,463 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 258 mSDsluCounter, 1089 mSDsCounter, 0 mSdLazyCounter, 2218 mSolverCounterSat, 855 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 3073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 855 IncrementalHoareTripleChecker+Valid, 2218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:29:16,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 1276 Invalid, 3073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [855 Valid, 2218 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-02-18 17:29:16,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2023-02-18 17:29:17,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 865. [2023-02-18 17:29:17,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 460 states have (on average 1.267391304347826) internal successors, (583), 462 states have internal predecessors, (583), 375 states have call successors, (375), 29 states have call predecessors, (375), 29 states have return successors, (374), 373 states have call predecessors, (374), 374 states have call successors, (374) [2023-02-18 17:29:17,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1332 transitions. [2023-02-18 17:29:17,500 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1332 transitions. Word has length 120 [2023-02-18 17:29:17,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:29:17,501 INFO L495 AbstractCegarLoop]: Abstraction has 865 states and 1332 transitions. [2023-02-18 17:29:17,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 24 states have internal predecessors, (62), 10 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 10 states have call predecessors, (36), 10 states have call successors, (36) [2023-02-18 17:29:17,501 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1332 transitions. [2023-02-18 17:29:17,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-18 17:29:17,502 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:29:17,503 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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 17:29:17,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-02-18 17:29:17,707 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 17:29:17,707 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:29:17,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:29:17,708 INFO L85 PathProgramCache]: Analyzing trace with hash -843376510, now seen corresponding path program 2 times [2023-02-18 17:29:17,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:29:17,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612751313] [2023-02-18 17:29:17,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:29:17,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:29:17,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:29:17,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250921300] [2023-02-18 17:29:17,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 17:29:17,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:29:17,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:29:17,715 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 17:29:17,717 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 17:29:17,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 17:29:17,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:29:17,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 17:29:17,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:29:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 89 proven. 45 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2023-02-18 17:29:17,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:29:18,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:29:18,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612751313] [2023-02-18 17:29:18,380 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:29:18,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250921300] [2023-02-18 17:29:18,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250921300] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:29:18,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:29:18,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-18 17:29:18,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875343502] [2023-02-18 17:29:18,380 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:29:18,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 17:29:18,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:29:18,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 17:29:18,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2023-02-18 17:29:18,382 INFO L87 Difference]: Start difference. First operand 865 states and 1332 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2023-02-18 17:29:20,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:29:20,297 INFO L93 Difference]: Finished difference Result 1035 states and 1569 transitions. [2023-02-18 17:29:20,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 17:29:20,298 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 120 [2023-02-18 17:29:20,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:29:20,301 INFO L225 Difference]: With dead ends: 1035 [2023-02-18 17:29:20,301 INFO L226 Difference]: Without dead ends: 880 [2023-02-18 17:29:20,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 164 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=286, Invalid=1354, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 17:29:20,303 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 96 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 17:29:20,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 434 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 17:29:20,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2023-02-18 17:29:21,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 865. [2023-02-18 17:29:21,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 460 states have (on average 1.2652173913043478) internal successors, (582), 462 states have internal predecessors, (582), 375 states have call successors, (375), 29 states have call predecessors, (375), 29 states have return successors, (374), 373 states have call predecessors, (374), 374 states have call successors, (374) [2023-02-18 17:29:21,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1331 transitions. [2023-02-18 17:29:21,286 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1331 transitions. Word has length 120 [2023-02-18 17:29:21,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:29:21,286 INFO L495 AbstractCegarLoop]: Abstraction has 865 states and 1331 transitions. [2023-02-18 17:29:21,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2023-02-18 17:29:21,286 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1331 transitions. [2023-02-18 17:29:21,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-02-18 17:29:21,288 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:29:21,288 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:29:21,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-18 17:29:21,506 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 17:29:21,506 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:29:21,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:29:21,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1948772218, now seen corresponding path program 3 times [2023-02-18 17:29:21,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:29:21,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032011853] [2023-02-18 17:29:21,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:29:21,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:29:21,513 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:29:21,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795262541] [2023-02-18 17:29:21,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 17:29:21,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:29:21,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:29:21,515 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 17:29:21,517 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 17:29:21,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-18 17:29:21,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:29:21,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 17:29:21,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:29:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 98 proven. 54 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2023-02-18 17:29:21,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:29:22,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:29:22,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032011853] [2023-02-18 17:29:22,328 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:29:22,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795262541] [2023-02-18 17:29:22,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795262541] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:29:22,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:29:22,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-02-18 17:29:22,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258007555] [2023-02-18 17:29:22,328 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:29:22,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 17:29:22,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:29:22,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 17:29:22,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2023-02-18 17:29:22,330 INFO L87 Difference]: Start difference. First operand 865 states and 1331 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2023-02-18 17:29:25,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:29:25,025 INFO L93 Difference]: Finished difference Result 1384 states and 2138 transitions. [2023-02-18 17:29:25,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-18 17:29:25,026 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 125 [2023-02-18 17:29:25,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:29:25,030 INFO L225 Difference]: With dead ends: 1384 [2023-02-18 17:29:25,030 INFO L226 Difference]: Without dead ends: 1229 [2023-02-18 17:29:25,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 168 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=520, Invalid=1832, Unknown=0, NotChecked=0, Total=2352 [2023-02-18 17:29:25,032 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 111 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-18 17:29:25,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 461 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-18 17:29:25,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2023-02-18 17:29:26,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 976. [2023-02-18 17:29:26,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 527 states have (on average 1.2618595825426946) internal successors, (665), 529 states have internal predecessors, (665), 419 states have call successors, (419), 29 states have call predecessors, (419), 29 states have return successors, (418), 417 states have call predecessors, (418), 418 states have call successors, (418) [2023-02-18 17:29:26,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1502 transitions. [2023-02-18 17:29:26,164 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1502 transitions. Word has length 125 [2023-02-18 17:29:26,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:29:26,164 INFO L495 AbstractCegarLoop]: Abstraction has 976 states and 1502 transitions. [2023-02-18 17:29:26,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2023-02-18 17:29:26,165 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1502 transitions. [2023-02-18 17:29:26,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-02-18 17:29:26,172 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:29:26,172 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:29:26,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-02-18 17:29:26,378 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 17:29:26,378 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:29:26,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:29:26,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1192369783, now seen corresponding path program 3 times [2023-02-18 17:29:26,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:29:26,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661749140] [2023-02-18 17:29:26,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:29:26,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:29:26,386 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:29:26,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [543620568] [2023-02-18 17:29:26,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 17:29:26,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:29:26,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:29:26,388 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 17:29:26,409 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 17:29:26,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-18 17:29:26,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:29:26,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 84 conjunts are in the unsatisfiable core [2023-02-18 17:29:26,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:29:26,878 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 94 proven. 42 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2023-02-18 17:29:26,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:29:29,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:29:29,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661749140] [2023-02-18 17:29:29,970 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:29:29,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543620568] [2023-02-18 17:29:29,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543620568] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:29:29,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:29:29,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-02-18 17:29:29,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382052514] [2023-02-18 17:29:29,971 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:29:29,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 17:29:29,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:29:29,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 17:29:29,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 17:29:29,973 INFO L87 Difference]: Start difference. First operand 976 states and 1502 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2023-02-18 17:29:33,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:29:33,633 INFO L93 Difference]: Finished difference Result 1181 states and 1807 transitions. [2023-02-18 17:29:33,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 17:29:33,634 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 134 [2023-02-18 17:29:33,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:29:33,638 INFO L225 Difference]: With dead ends: 1181 [2023-02-18 17:29:33,638 INFO L226 Difference]: Without dead ends: 1174 [2023-02-18 17:29:33,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 152 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=263, Invalid=1543, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 17:29:33,639 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 86 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:29:33,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 299 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-02-18 17:29:33,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2023-02-18 17:29:35,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 1130. [2023-02-18 17:29:35,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 611 states have (on average 1.2618657937806874) internal successors, (771), 613 states have internal predecessors, (771), 483 states have call successors, (483), 35 states have call predecessors, (483), 35 states have return successors, (482), 481 states have call predecessors, (482), 482 states have call successors, (482) [2023-02-18 17:29:35,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 1736 transitions. [2023-02-18 17:29:35,028 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 1736 transitions. Word has length 134 [2023-02-18 17:29:35,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:29:35,028 INFO L495 AbstractCegarLoop]: Abstraction has 1130 states and 1736 transitions. [2023-02-18 17:29:35,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2023-02-18 17:29:35,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 1736 transitions. [2023-02-18 17:29:35,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-02-18 17:29:35,030 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:29:35,030 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:29:35,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-18 17:29:35,235 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 17:29:35,235 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:29:35,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:29:35,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1841111375, now seen corresponding path program 4 times [2023-02-18 17:29:35,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:29:35,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589698525] [2023-02-18 17:29:35,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:29:35,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:29:35,245 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:29:35,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [489368942] [2023-02-18 17:29:35,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 17:29:35,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:29:35,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:29:35,247 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 17:29:35,250 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 17:29:35,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 17:29:35,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:29:35,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 91 conjunts are in the unsatisfiable core [2023-02-18 17:29:35,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:29:35,600 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 76 proven. 66 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2023-02-18 17:29:35,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:29:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 70 proven. 63 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2023-02-18 17:29:41,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:29:41,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589698525] [2023-02-18 17:29:41,859 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:29:41,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489368942] [2023-02-18 17:29:41,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489368942] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:29:41,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:29:41,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19] total 39 [2023-02-18 17:29:41,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303339353] [2023-02-18 17:29:41,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:29:41,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-18 17:29:41,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:29:41,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-18 17:29:41,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 17:29:41,862 INFO L87 Difference]: Start difference. First operand 1130 states and 1736 transitions. Second operand has 39 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 states have internal predecessors, (76), 14 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 12 states have call predecessors, (38), 12 states have call successors, (38) [2023-02-18 17:29:57,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:30:02,639 WARN L539 Checker$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 17:30:04,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:30:06,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:30:08,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:30:16,600 WARN L539 Checker$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 17:30:21,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:30:26,373 WARN L539 Checker$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 17:30:28,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:30:31,814 WARN L539 Checker$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 17:30:33,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:30:35,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:30:37,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:30:39,463 WARN L539 Checker$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 17:30:50,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:30:55,354 WARN L539 Checker$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 17:31:00,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:31:02,825 WARN L539 Checker$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 17:31:04,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:31:18,577 WARN L539 Checker$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 17:31:26,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:31:31,468 WARN L539 Checker$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 17:31:36,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:31:42,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:31:43,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:31:56,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:32:00,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:32:05,449 WARN L539 Checker$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 17:32:06,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:32:08,895 WARN L539 Checker$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 17:32:18,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:32:21,114 WARN L539 Checker$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 17:32:34,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:32:34,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:32:34,744 INFO L93 Difference]: Finished difference Result 1392 states and 2106 transitions. [2023-02-18 17:32:34,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-02-18 17:32:34,745 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 states have internal predecessors, (76), 14 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 12 states have call predecessors, (38), 12 states have call successors, (38) Word has length 134 [2023-02-18 17:32:34,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:32:34,750 INFO L225 Difference]: With dead ends: 1392 [2023-02-18 17:32:34,750 INFO L226 Difference]: Without dead ends: 1388 [2023-02-18 17:32:34,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 227 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5573 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=2991, Invalid=15098, Unknown=1, NotChecked=0, Total=18090 [2023-02-18 17:32:34,754 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 368 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 4162 mSolverCounterSat, 941 mSolverCounterUnsat, 24 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 135.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 5127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 941 IncrementalHoareTripleChecker+Valid, 4162 IncrementalHoareTripleChecker+Invalid, 24 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 136.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:32:34,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 657 Invalid, 5127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [941 Valid, 4162 Invalid, 24 Unknown, 0 Unchecked, 136.0s Time] [2023-02-18 17:32:34,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2023-02-18 17:32:37,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1294. [2023-02-18 17:32:37,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 698 states have (on average 1.2636103151862463) internal successors, (882), 700 states have internal predecessors, (882), 551 states have call successors, (551), 44 states have call predecessors, (551), 44 states have return successors, (550), 549 states have call predecessors, (550), 550 states have call successors, (550) [2023-02-18 17:32:37,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 1983 transitions. [2023-02-18 17:32:37,206 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 1983 transitions. Word has length 134 [2023-02-18 17:32:37,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:32:37,206 INFO L495 AbstractCegarLoop]: Abstraction has 1294 states and 1983 transitions. [2023-02-18 17:32:37,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 states have internal predecessors, (76), 14 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 12 states have call predecessors, (38), 12 states have call successors, (38) [2023-02-18 17:32:37,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 1983 transitions. [2023-02-18 17:32:37,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-02-18 17:32:37,209 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:32:37,209 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:32:37,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-18 17:32:37,414 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 17:32:37,415 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:32:37,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:32:37,415 INFO L85 PathProgramCache]: Analyzing trace with hash -969870237, now seen corresponding path program 4 times [2023-02-18 17:32:37,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:32:37,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472000513] [2023-02-18 17:32:37,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:32:37,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:32:37,421 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:32:37,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281308447] [2023-02-18 17:32:37,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 17:32:37,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:32:37,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:32:37,429 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 17:32:37,451 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 17:32:37,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 17:32:37,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:32:37,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 17:32:37,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:32:37,675 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 116 proven. 65 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2023-02-18 17:32:37,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:32:38,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:32:38,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472000513] [2023-02-18 17:32:38,175 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:32:38,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281308447] [2023-02-18 17:32:38,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281308447] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:32:38,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:32:38,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-02-18 17:32:38,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117972054] [2023-02-18 17:32:38,175 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:32:38,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 17:32:38,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:32:38,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 17:32:38,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2023-02-18 17:32:38,177 INFO L87 Difference]: Start difference. First operand 1294 states and 1983 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) [2023-02-18 17:32:42,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:32:42,296 INFO L93 Difference]: Finished difference Result 1676 states and 2584 transitions. [2023-02-18 17:32:42,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-18 17:32:42,296 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) Word has length 142 [2023-02-18 17:32:42,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:32:42,306 INFO L225 Difference]: With dead ends: 1676 [2023-02-18 17:32:42,306 INFO L226 Difference]: Without dead ends: 1525 [2023-02-18 17:32:42,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 185 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=360, Invalid=1802, Unknown=0, NotChecked=0, Total=2162 [2023-02-18 17:32:42,308 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 121 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 17:32:42,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 528 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 17:32:42,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2023-02-18 17:32:44,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1317. [2023-02-18 17:32:44,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 713 states have (on average 1.2608695652173914) internal successors, (899), 715 states have internal predecessors, (899), 559 states have call successors, (559), 44 states have call predecessors, (559), 44 states have return successors, (558), 557 states have call predecessors, (558), 558 states have call successors, (558) [2023-02-18 17:32:44,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 2016 transitions. [2023-02-18 17:32:44,835 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 2016 transitions. Word has length 142 [2023-02-18 17:32:44,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:32:44,835 INFO L495 AbstractCegarLoop]: Abstraction has 1317 states and 2016 transitions. [2023-02-18 17:32:44,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) [2023-02-18 17:32:44,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 2016 transitions. [2023-02-18 17:32:44,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-02-18 17:32:44,838 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:32:44,839 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:32:44,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-02-18 17:32:45,043 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 17:32:45,043 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:32:45,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:32:45,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1917326542, now seen corresponding path program 5 times [2023-02-18 17:32:45,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:32:45,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564050182] [2023-02-18 17:32:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:32:45,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:32:45,050 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:32:45,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150574244] [2023-02-18 17:32:45,052 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 17:32:45,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:32:45,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:32:45,053 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 17:32:45,055 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 17:32:45,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-18 17:32:45,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:32:45,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 124 conjunts are in the unsatisfiable core [2023-02-18 17:32:45,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:32:45,554 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 41 proven. 201 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-02-18 17:32:45,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:32:48,929 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 80 proven. 116 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2023-02-18 17:32:48,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:32:48,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564050182] [2023-02-18 17:32:48,929 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:32:48,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150574244] [2023-02-18 17:32:48,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150574244] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:32:48,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:32:48,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18] total 41 [2023-02-18 17:32:48,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971615311] [2023-02-18 17:32:48,930 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:32:48,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-18 17:32:48,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:32:48,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-18 17:32:48,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1398, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 17:32:48,932 INFO L87 Difference]: Start difference. First operand 1317 states and 2016 transitions. Second operand has 41 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 14 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (39), 11 states have call predecessors, (39), 12 states have call successors, (39) [2023-02-18 17:32:55,721 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 17:33:00,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:33:02,702 WARN L539 Checker$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 17:33:05,422 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 17:33:36,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:33:36,037 INFO L93 Difference]: Finished difference Result 1841 states and 2813 transitions. [2023-02-18 17:33:36,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-02-18 17:33:36,037 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 14 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (39), 11 states have call predecessors, (39), 12 states have call successors, (39) Word has length 142 [2023-02-18 17:33:36,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:33:36,043 INFO L225 Difference]: With dead ends: 1841 [2023-02-18 17:33:36,043 INFO L226 Difference]: Without dead ends: 1609 [2023-02-18 17:33:36,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 276 SyntacticMatches, 5 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4508 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=2534, Invalid=12471, Unknown=1, NotChecked=0, Total=15006 [2023-02-18 17:33:36,046 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 406 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 3356 mSolverCounterSat, 787 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 4147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 787 IncrementalHoareTripleChecker+Valid, 3356 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.7s IncrementalHoareTripleChecker+Time [2023-02-18 17:33:36,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 522 Invalid, 4147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [787 Valid, 3356 Invalid, 4 Unknown, 0 Unchecked, 27.7s Time] [2023-02-18 17:33:36,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2023-02-18 17:33:39,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1436. [2023-02-18 17:33:39,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 777 states have (on average 1.2664092664092663) internal successors, (984), 780 states have internal predecessors, (984), 609 states have call successors, (609), 49 states have call predecessors, (609), 49 states have return successors, (608), 606 states have call predecessors, (608), 608 states have call successors, (608) [2023-02-18 17:33:39,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 2201 transitions. [2023-02-18 17:33:39,279 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 2201 transitions. Word has length 142 [2023-02-18 17:33:39,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:33:39,279 INFO L495 AbstractCegarLoop]: Abstraction has 1436 states and 2201 transitions. [2023-02-18 17:33:39,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 14 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (39), 11 states have call predecessors, (39), 12 states have call successors, (39) [2023-02-18 17:33:39,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 2201 transitions. [2023-02-18 17:33:39,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-02-18 17:33:39,282 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:33:39,282 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:33:39,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-18 17:33:39,487 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 17:33:39,487 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:33:39,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:33:39,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1075315432, now seen corresponding path program 6 times [2023-02-18 17:33:39,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:33:39,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958092995] [2023-02-18 17:33:39,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:33:39,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:33:39,494 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:33:39,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438671596] [2023-02-18 17:33:39,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 17:33:39,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:33:39,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:33:39,495 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 17:33:39,497 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 17:33:39,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-18 17:33:39,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:33:39,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 116 conjunts are in the unsatisfiable core [2023-02-18 17:33:39,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:33:40,317 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 65 proven. 175 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2023-02-18 17:33:40,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:33:47,831 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 120 proven. 69 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2023-02-18 17:33:47,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:33:47,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958092995] [2023-02-18 17:33:47,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:33:47,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438671596] [2023-02-18 17:33:47,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438671596] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:33:47,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:33:47,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 16] total 40 [2023-02-18 17:33:47,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684387706] [2023-02-18 17:33:47,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:33:47,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-18 17:33:47,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:33:47,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-18 17:33:47,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1328, Unknown=0, NotChecked=0, Total=1560 [2023-02-18 17:33:47,834 INFO L87 Difference]: Start difference. First operand 1436 states and 2201 transitions. Second operand has 40 states, 37 states have (on average 2.324324324324324) internal successors, (86), 36 states have internal predecessors, (86), 15 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (39), 13 states have call predecessors, (39), 13 states have call successors, (39) [2023-02-18 17:34:08,778 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 17:34:10,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 17:34:16,545 WARN L539 Checker$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 17:34:18,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:34:36,761 WARN L539 Checker$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 17:34:39,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 17:34:44,590 WARN L539 Checker$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 17:34:54,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 17:34:58,710 WARN L539 Checker$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 17:35:02,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 17:35:10,768 WARN L539 Checker$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 17:35:15,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:35:22,238 WARN L539 Checker$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 17:35:25,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:35:29,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 17:35:31,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 17:35:57,287 WARN L539 Checker$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 17:35:57,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:35:57,659 INFO L93 Difference]: Finished difference Result 1989 states and 3050 transitions. [2023-02-18 17:35:57,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-02-18 17:35:57,660 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 2.324324324324324) internal successors, (86), 36 states have internal predecessors, (86), 15 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (39), 13 states have call predecessors, (39), 13 states have call successors, (39) Word has length 142 [2023-02-18 17:35:57,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:35:57,670 INFO L225 Difference]: With dead ends: 1989 [2023-02-18 17:35:57,670 INFO L226 Difference]: Without dead ends: 1974 [2023-02-18 17:35:57,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 256 SyntacticMatches, 6 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5302 ImplicationChecksByTransitivity, 52.9s TimeCoverageRelationStatistics Valid=2681, Invalid=13569, Unknown=6, NotChecked=0, Total=16256 [2023-02-18 17:35:57,672 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 525 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 3710 mSolverCounterSat, 850 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 79.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 4575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 850 IncrementalHoareTripleChecker+Valid, 3710 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 79.8s IncrementalHoareTripleChecker+Time [2023-02-18 17:35:57,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 641 Invalid, 4575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [850 Valid, 3710 Invalid, 15 Unknown, 0 Unchecked, 79.8s Time] [2023-02-18 17:35:57,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1974 states. [2023-02-18 17:36:01,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1974 to 1470. [2023-02-18 17:36:01,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 791 states have (on average 1.2579013906447534) internal successors, (995), 795 states have internal predecessors, (995), 624 states have call successors, (624), 54 states have call predecessors, (624), 54 states have return successors, (623), 620 states have call predecessors, (623), 623 states have call successors, (623) [2023-02-18 17:36:01,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 2242 transitions. [2023-02-18 17:36:01,079 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 2242 transitions. Word has length 142 [2023-02-18 17:36:01,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:36:01,079 INFO L495 AbstractCegarLoop]: Abstraction has 1470 states and 2242 transitions. [2023-02-18 17:36:01,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 2.324324324324324) internal successors, (86), 36 states have internal predecessors, (86), 15 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (39), 13 states have call predecessors, (39), 13 states have call successors, (39) [2023-02-18 17:36:01,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 2242 transitions. [2023-02-18 17:36:01,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-02-18 17:36:01,082 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:36:01,082 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 6, 5, 5, 5, 5, 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, 1] [2023-02-18 17:36:01,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-18 17:36:01,301 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 17:36:01,301 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:36:01,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:36:01,302 INFO L85 PathProgramCache]: Analyzing trace with hash -2005711590, now seen corresponding path program 5 times [2023-02-18 17:36:01,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:36:01,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675748485] [2023-02-18 17:36:01,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:36:01,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:36:01,310 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:36:01,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709197801] [2023-02-18 17:36:01,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 17:36:01,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:36:01,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:36:01,326 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 17:36:01,327 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 17:36:01,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-18 17:36:01,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:36:01,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 17:36:01,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:36:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 127 proven. 64 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2023-02-18 17:36:01,589 INFO L328 TraceCheckSpWp]: Computing backward predicates...