./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 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-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-?-26d01a9 [2023-02-18 02:11:00,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 02:11:00,015 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 02:11:00,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 02:11:00,045 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 02:11:00,047 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 02:11:00,049 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 02:11:00,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 02:11:00,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 02:11:00,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 02:11:00,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 02:11:00,060 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 02:11:00,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 02:11:00,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 02:11:00,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 02:11:00,064 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 02:11:00,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 02:11:00,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 02:11:00,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 02:11:00,072 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 02:11:00,073 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 02:11:00,073 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 02:11:00,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 02:11:00,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 02:11:00,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 02:11:00,078 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 02:11:00,078 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 02:11:00,079 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 02:11:00,080 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 02:11:00,080 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 02:11:00,080 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 02:11:00,081 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 02:11:00,082 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 02:11:00,083 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 02:11:00,084 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 02:11:00,084 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 02:11:00,085 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 02:11:00,085 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 02:11:00,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 02:11:00,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 02:11:00,087 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 02:11:00,087 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 02:11:00,114 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 02:11:00,114 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 02:11:00,114 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 02:11:00,114 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 02:11:00,115 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 02:11:00,115 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 02:11:00,116 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 02:11:00,116 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 02:11:00,116 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 02:11:00,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 02:11:00,117 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 02:11:00,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 02:11:00,117 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 02:11:00,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 02:11:00,117 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 02:11:00,118 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 02:11:00,118 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 02:11:00,118 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 02:11:00,118 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 02:11:00,118 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 02:11:00,118 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 02:11:00,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 02:11:00,119 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 02:11:00,119 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 02:11:00,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 02:11:00,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 02:11:00,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 02:11:00,119 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 02:11:00,120 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 02:11:00,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 02:11:00,120 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 02:11:00,120 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 02:11:00,121 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 02:11:00,121 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 02:11:00,121 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 02:11:00,121 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1aca3c96522e618238f11f200c96e0ec490e756d4e04895bd2a51f9a4ff85af1 [2023-02-18 02:11:00,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 02:11:00,353 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 02:11:00,355 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 02:11:00,356 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 02:11:00,356 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 02:11:00,357 INFO L432 ainManager$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 02:11:01,266 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 02:11:01,454 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 02:11:01,454 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c [2023-02-18 02:11:01,460 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/268daac0a/fa4b3aa7c5ed40159c731de7c8ab7ec7/FLAGcb51ef411 [2023-02-18 02:11:01,471 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/268daac0a/fa4b3aa7c5ed40159c731de7c8ab7ec7 [2023-02-18 02:11:01,473 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 02:11:01,474 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 02:11:01,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 02:11:01,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 02:11:01,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 02:11:01,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 02:11:01" (1/1) ... [2023-02-18 02:11:01,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e479bd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:11:01, skipping insertion in model container [2023-02-18 02:11:01,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 02:11:01" (1/1) ... [2023-02-18 02:11:01,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 02:11:01,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 02:11:01,576 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 02:11:01,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 02:11:01,593 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 02:11:01,600 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 02:11:01,617 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 02:11:01,631 INFO L208 MainTranslator]: Completed translation [2023-02-18 02:11:01,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:11:01 WrapperNode [2023-02-18 02:11:01,631 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 02:11:01,632 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 02:11:01,632 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 02:11:01,632 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 02:11:01,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:11:01" (1/1) ... [2023-02-18 02:11:01,641 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:11:01" (1/1) ... [2023-02-18 02:11:01,657 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2023-02-18 02:11:01,657 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 02:11:01,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 02:11:01,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 02:11:01,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 02:11:01,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:11:01" (1/1) ... [2023-02-18 02:11:01,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:11:01" (1/1) ... [2023-02-18 02:11:01,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:11:01" (1/1) ... [2023-02-18 02:11:01,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:11:01" (1/1) ... [2023-02-18 02:11:01,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:11:01" (1/1) ... [2023-02-18 02:11:01,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:11:01" (1/1) ... [2023-02-18 02:11:01,688 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:11:01" (1/1) ... [2023-02-18 02:11:01,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:11:01" (1/1) ... [2023-02-18 02:11:01,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 02:11:01,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 02:11:01,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 02:11:01,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 02:11:01,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:11:01" (1/1) ... [2023-02-18 02:11:01,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 02:11:01,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:11:01,717 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 02:11:01,720 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 02:11:01,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 02:11:01,742 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-18 02:11:01,742 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-18 02:11:01,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 02:11:01,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 02:11:01,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 02:11:01,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 02:11:01,743 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 02:11:01,787 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 02:11:01,789 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 02:11:01,958 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 02:11:01,962 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 02:11:01,963 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-18 02:11:01,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 02:11:01 BoogieIcfgContainer [2023-02-18 02:11:01,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 02:11:01,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 02:11:01,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 02:11:01,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 02:11:02,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 02:11:01" (1/3) ... [2023-02-18 02:11:02,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa30b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 02:11:02, skipping insertion in model container [2023-02-18 02:11:02,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:11:01" (2/3) ... [2023-02-18 02:11:02,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa30b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 02:11:02, skipping insertion in model container [2023-02-18 02:11:02,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 02:11:01" (3/3) ... [2023-02-18 02:11:02,003 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound5.c [2023-02-18 02:11:02,015 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 02:11:02,016 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 02:11:02,064 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 02:11:02,071 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;@32c7fde8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 02:11:02,072 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 02:11:02,075 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 02:11:02,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 02:11:02,082 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:11:02,083 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 02:11:02,084 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:11:02,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:11:02,089 INFO L85 PathProgramCache]: Analyzing trace with hash 872320404, now seen corresponding path program 1 times [2023-02-18 02:11:02,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:11:02,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810677010] [2023-02-18 02:11:02,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:02,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:11:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:11:02,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:11:02,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810677010] [2023-02-18 02:11:02,181 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 02:11:02,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555954529] [2023-02-18 02:11:02,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:02,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:11:02,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:11:02,186 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 02:11:02,189 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 02:11:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:11:02,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 02:11:02,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:11:02,265 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 02:11:02,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 02:11:02,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555954529] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:11:02,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:11:02,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 02:11:02,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689098060] [2023-02-18 02:11:02,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:11:02,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 02:11:02,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:11:02,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 02:11:02,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 02:11:02,289 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 02:11:02,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:11:02,308 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2023-02-18 02:11:02,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 02:11:02,310 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 02:11:02,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:11:02,315 INFO L225 Difference]: With dead ends: 67 [2023-02-18 02:11:02,317 INFO L226 Difference]: Without dead ends: 31 [2023-02-18 02:11:02,319 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 02:11:02,322 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 02:11:02,324 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 02:11:02,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-18 02:11:02,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-18 02:11:02,361 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 02:11:02,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2023-02-18 02:11:02,363 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2023-02-18 02:11:02,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:11:02,363 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2023-02-18 02:11:02,364 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 02:11:02,364 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2023-02-18 02:11:02,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 02:11:02,365 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:11:02,365 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 02:11:02,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 02:11:02,566 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 02:11:02,566 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:11:02,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:11:02,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1714405113, now seen corresponding path program 1 times [2023-02-18 02:11:02,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:11:02,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092264063] [2023-02-18 02:11:02,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:02,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:11:02,587 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:11:02,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1198718064] [2023-02-18 02:11:02,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:02,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:11:02,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:11:02,606 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 02:11:02,607 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 02:11:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:11:02,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 02:11:02,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:11:02,716 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 02:11:02,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 02:11:02,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:11:02,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092264063] [2023-02-18 02:11:02,717 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:11:02,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198718064] [2023-02-18 02:11:02,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198718064] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:11:02,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:11:02,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 02:11:02,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351499435] [2023-02-18 02:11:02,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:11:02,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 02:11:02,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:11:02,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 02:11:02,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 02:11:02,719 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 02:11:02,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:11:02,844 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2023-02-18 02:11:02,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 02:11:02,845 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 02:11:02,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:11:02,846 INFO L225 Difference]: With dead ends: 50 [2023-02-18 02:11:02,847 INFO L226 Difference]: Without dead ends: 43 [2023-02-18 02:11:02,847 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 02:11:02,848 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 32 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 02:11:02,849 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 02:11:02,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-18 02:11:02,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2023-02-18 02:11:02,869 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 02:11:02,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2023-02-18 02:11:02,870 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2023-02-18 02:11:02,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:11:02,870 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2023-02-18 02:11:02,870 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 02:11:02,870 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2023-02-18 02:11:02,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-18 02:11:02,871 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:11:02,871 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 02:11:02,887 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 02:11:03,085 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 02:11:03,085 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:11:03,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:11:03,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1825736765, now seen corresponding path program 1 times [2023-02-18 02:11:03,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:11:03,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511889091] [2023-02-18 02:11:03,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:03,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:11:03,097 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:11:03,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [957385931] [2023-02-18 02:11:03,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:03,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:11:03,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:11:03,103 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 02:11:03,104 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 02:11:03,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:11:03,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 02:11:03,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:11:03,194 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 02:11:03,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 02:11:03,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:11:03,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511889091] [2023-02-18 02:11:03,195 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:11:03,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957385931] [2023-02-18 02:11:03,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957385931] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:11:03,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:11:03,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 02:11:03,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189365012] [2023-02-18 02:11:03,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:11:03,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 02:11:03,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:11:03,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 02:11:03,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-18 02:11:03,197 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 02:11:03,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:11:03,286 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2023-02-18 02:11:03,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 02:11:03,286 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 02:11:03,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:11:03,287 INFO L225 Difference]: With dead ends: 49 [2023-02-18 02:11:03,287 INFO L226 Difference]: Without dead ends: 47 [2023-02-18 02:11:03,288 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 02:11:03,288 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 02:11:03,289 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 02:11:03,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-18 02:11:03,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2023-02-18 02:11:03,304 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 02:11:03,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-02-18 02:11:03,307 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2023-02-18 02:11:03,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:11:03,308 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-02-18 02:11:03,308 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 02:11:03,308 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-02-18 02:11:03,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 02:11:03,310 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:11:03,310 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 02:11:03,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-18 02:11:03,510 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 02:11:03,511 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:11:03,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:11:03,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1547103247, now seen corresponding path program 1 times [2023-02-18 02:11:03,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:11:03,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309773063] [2023-02-18 02:11:03,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:03,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:11:03,537 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:11:03,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [672794313] [2023-02-18 02:11:03,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:03,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:11:03,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:11:03,540 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 02:11:03,542 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 02:11:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:11:03,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 02:11:03,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:11:03,612 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 02:11:03,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:11:03,669 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 02:11:03,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:11:03,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309773063] [2023-02-18 02:11:03,670 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:11:03,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672794313] [2023-02-18 02:11:03,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672794313] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:11:03,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:11:03,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-18 02:11:03,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191131791] [2023-02-18 02:11:03,670 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:11:03,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 02:11:03,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:11:03,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 02:11:03,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-18 02:11:03,673 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 02:11:03,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:11:03,832 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2023-02-18 02:11:03,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 02:11:03,832 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 02:11:03,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:11:03,839 INFO L225 Difference]: With dead ends: 99 [2023-02-18 02:11:03,839 INFO L226 Difference]: Without dead ends: 92 [2023-02-18 02:11:03,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-18 02:11:03,842 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 02:11:03,843 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 02:11:03,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-18 02:11:03,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2023-02-18 02:11:03,858 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 02:11:03,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2023-02-18 02:11:03,866 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2023-02-18 02:11:03,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:11:03,866 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2023-02-18 02:11:03,866 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 02:11:03,867 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2023-02-18 02:11:03,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 02:11:03,869 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:11:03,869 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 02:11:03,879 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 02:11:04,073 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 02:11:04,074 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:11:04,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:11:04,074 INFO L85 PathProgramCache]: Analyzing trace with hash -720434099, now seen corresponding path program 1 times [2023-02-18 02:11:04,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:11:04,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288822155] [2023-02-18 02:11:04,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:04,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:11:04,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:11:04,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2136221303] [2023-02-18 02:11:04,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:04,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:11:04,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:11:04,087 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 02:11:04,088 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 02:11:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:11:04,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 02:11:04,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:11:04,150 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 02:11:04,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:11:04,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:11:04,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288822155] [2023-02-18 02:11:04,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:11:04,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136221303] [2023-02-18 02:11:04,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136221303] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 02:11:04,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 02:11:04,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-02-18 02:11:04,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887217858] [2023-02-18 02:11:04,198 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 02:11:04,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 02:11:04,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:11:04,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 02:11:04,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-18 02:11:04,199 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 02:11:04,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:11:04,261 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2023-02-18 02:11:04,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 02:11:04,261 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 02:11:04,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:11:04,262 INFO L225 Difference]: With dead ends: 75 [2023-02-18 02:11:04,262 INFO L226 Difference]: Without dead ends: 73 [2023-02-18 02:11:04,263 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 02:11:04,263 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 02:11:04,263 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 02:11:04,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-02-18 02:11:04,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2023-02-18 02:11:04,269 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 02:11:04,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2023-02-18 02:11:04,270 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 38 [2023-02-18 02:11:04,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:11:04,271 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2023-02-18 02:11:04,271 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 02:11:04,271 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2023-02-18 02:11:04,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 02:11:04,271 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:11:04,271 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 02:11:04,280 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 02:11:04,473 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 02:11:04,473 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:11:04,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:11:04,474 INFO L85 PathProgramCache]: Analyzing trace with hash -376152117, now seen corresponding path program 1 times [2023-02-18 02:11:04,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:11:04,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970954329] [2023-02-18 02:11:04,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:04,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:11:04,483 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:11:04,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388277256] [2023-02-18 02:11:04,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:04,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:11:04,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:11:04,501 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 02:11:04,506 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 02:11:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:11:04,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-18 02:11:04,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:11:04,599 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 02:11:04,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:11:04,694 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 02:11:04,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:11:04,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970954329] [2023-02-18 02:11:04,695 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:11:04,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388277256] [2023-02-18 02:11:04,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388277256] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:11:04,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:11:04,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2023-02-18 02:11:04,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381824363] [2023-02-18 02:11:04,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:11:04,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 02:11:04,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:11:04,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 02:11:04,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-18 02:11:04,699 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-18 02:11:04,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:11:04,859 INFO L93 Difference]: Finished difference Result 107 states and 143 transitions. [2023-02-18 02:11:04,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 02:11:04,860 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 38 [2023-02-18 02:11:04,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:11:04,861 INFO L225 Difference]: With dead ends: 107 [2023-02-18 02:11:04,861 INFO L226 Difference]: Without dead ends: 105 [2023-02-18 02:11:04,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-02-18 02:11:04,862 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 43 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 02:11:04,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 259 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 02:11:04,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-02-18 02:11:04,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2023-02-18 02:11:04,883 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 02:11:04,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 137 transitions. [2023-02-18 02:11:04,885 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 137 transitions. Word has length 38 [2023-02-18 02:11:04,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:11:04,886 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 137 transitions. [2023-02-18 02:11:04,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-18 02:11:04,887 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 137 transitions. [2023-02-18 02:11:04,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 02:11:04,888 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:11:04,888 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 02:11:04,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-18 02:11:05,093 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 02:11:05,093 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:11:05,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:11:05,093 INFO L85 PathProgramCache]: Analyzing trace with hash 279172547, now seen corresponding path program 1 times [2023-02-18 02:11:05,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:11:05,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537221838] [2023-02-18 02:11:05,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:05,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:11:05,103 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:11:05,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674086476] [2023-02-18 02:11:05,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:05,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:11:05,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:11:05,104 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 02:11:05,120 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 02:11:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:11:05,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 02:11:05,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:11:05,249 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 02:11:05,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:11:07,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:11:07,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537221838] [2023-02-18 02:11:07,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:11:07,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674086476] [2023-02-18 02:11:07,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674086476] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 02:11:07,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 02:11:07,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-02-18 02:11:07,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42261745] [2023-02-18 02:11:07,298 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 02:11:07,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 02:11:07,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:11:07,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 02:11:07,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=171, Unknown=1, NotChecked=0, Total=210 [2023-02-18 02:11:07,299 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 02:11:07,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:11:07,522 INFO L93 Difference]: Finished difference Result 114 states and 154 transitions. [2023-02-18 02:11:07,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 02:11:07,523 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 02:11:07,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:11:07,523 INFO L225 Difference]: With dead ends: 114 [2023-02-18 02:11:07,523 INFO L226 Difference]: Without dead ends: 112 [2023-02-18 02:11:07,524 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 02:11:07,524 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 36 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 02:11:07,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 133 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 02:11:07,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-18 02:11:07,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2023-02-18 02:11:07,532 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 02:11:07,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 151 transitions. [2023-02-18 02:11:07,532 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 151 transitions. Word has length 43 [2023-02-18 02:11:07,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:11:07,533 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 151 transitions. [2023-02-18 02:11:07,533 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 02:11:07,533 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 151 transitions. [2023-02-18 02:11:07,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 02:11:07,534 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:11:07,534 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 02:11:07,555 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 02:11:07,745 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 02:11:07,745 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:11:07,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:11:07,745 INFO L85 PathProgramCache]: Analyzing trace with hash -2141198011, now seen corresponding path program 1 times [2023-02-18 02:11:07,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:11:07,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407263153] [2023-02-18 02:11:07,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:07,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:11:07,753 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:11:07,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621269361] [2023-02-18 02:11:07,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:07,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:11:07,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:11:07,754 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 02:11:07,756 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 02:11:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:11:07,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-18 02:11:07,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:11:07,867 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 02:11:07,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:11:07,983 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 02:11:07,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:11:07,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407263153] [2023-02-18 02:11:07,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:11:07,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621269361] [2023-02-18 02:11:07,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621269361] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:11:07,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:11:07,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 19 [2023-02-18 02:11:07,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244926078] [2023-02-18 02:11:07,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:11:07,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 02:11:07,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:11:07,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 02:11:07,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-02-18 02:11:07,985 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 02:11:10,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:11:10,330 INFO L93 Difference]: Finished difference Result 182 states and 255 transitions. [2023-02-18 02:11:10,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 02:11:10,330 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 02:11:10,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:11:10,332 INFO L225 Difference]: With dead ends: 182 [2023-02-18 02:11:10,332 INFO L226 Difference]: Without dead ends: 180 [2023-02-18 02:11:10,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=911, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 02:11:10,333 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 155 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-02-18 02:11:10,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 201 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-02-18 02:11:10,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-02-18 02:11:10,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 141. [2023-02-18 02:11:10,353 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 02:11:10,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 191 transitions. [2023-02-18 02:11:10,354 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 191 transitions. Word has length 43 [2023-02-18 02:11:10,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:11:10,354 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 191 transitions. [2023-02-18 02:11:10,354 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 02:11:10,354 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 191 transitions. [2023-02-18 02:11:10,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 02:11:10,355 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:11:10,355 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 02:11:10,363 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 02:11:10,563 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 02:11:10,564 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:11:10,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:11:10,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1796916029, now seen corresponding path program 2 times [2023-02-18 02:11:10,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:11:10,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349114771] [2023-02-18 02:11:10,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:10,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:11:10,578 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:11:10,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1270200924] [2023-02-18 02:11:10,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 02:11:10,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:11:10,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:11:10,581 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 02:11:10,584 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 02:11:10,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 02:11:10,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:11:10,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 02:11:10,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:11:10,628 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 02:11:10,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 02:11:10,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:11:10,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349114771] [2023-02-18 02:11:10,628 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:11:10,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270200924] [2023-02-18 02:11:10,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270200924] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:11:10,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:11:10,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 02:11:10,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287901149] [2023-02-18 02:11:10,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:11:10,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 02:11:10,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:11:10,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 02:11:10,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 02:11:10,630 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 02:11:10,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:11:10,696 INFO L93 Difference]: Finished difference Result 195 states and 270 transitions. [2023-02-18 02:11:10,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 02:11:10,696 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 02:11:10,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:11:10,697 INFO L225 Difference]: With dead ends: 195 [2023-02-18 02:11:10,697 INFO L226 Difference]: Without dead ends: 132 [2023-02-18 02:11:10,698 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 02:11:10,698 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 02:11:10,699 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 02:11:10,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-02-18 02:11:10,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 97. [2023-02-18 02:11:10,716 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 02:11:10,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 124 transitions. [2023-02-18 02:11:10,717 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 124 transitions. Word has length 43 [2023-02-18 02:11:10,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:11:10,717 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 124 transitions. [2023-02-18 02:11:10,717 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 02:11:10,717 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 124 transitions. [2023-02-18 02:11:10,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-18 02:11:10,720 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:11:10,720 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 02:11:10,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 02:11:10,924 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 02:11:10,924 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:11:10,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:11:10,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1189241395, now seen corresponding path program 1 times [2023-02-18 02:11:10,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:11:10,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317275390] [2023-02-18 02:11:10,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:10,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:11:10,931 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:11:10,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1631935388] [2023-02-18 02:11:10,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:10,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:11:10,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:11:10,933 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 02:11:10,940 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 02:11:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:11:10,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 02:11:10,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:11:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-18 02:11:11,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:11:11,019 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 02:11:11,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:11:11,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317275390] [2023-02-18 02:11:11,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:11:11,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631935388] [2023-02-18 02:11:11,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631935388] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 02:11:11,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 02:11:11,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-02-18 02:11:11,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867089444] [2023-02-18 02:11:11,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:11:11,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 02:11:11,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:11:11,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 02:11:11,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-02-18 02:11:11,022 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 02:11:11,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:11:11,065 INFO L93 Difference]: Finished difference Result 103 states and 129 transitions. [2023-02-18 02:11:11,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 02:11:11,065 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 02:11:11,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:11:11,066 INFO L225 Difference]: With dead ends: 103 [2023-02-18 02:11:11,066 INFO L226 Difference]: Without dead ends: 101 [2023-02-18 02:11:11,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-02-18 02:11:11,067 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 02:11:11,067 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 02:11:11,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-18 02:11:11,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-02-18 02:11:11,081 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 02:11:11,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 127 transitions. [2023-02-18 02:11:11,082 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 127 transitions. Word has length 48 [2023-02-18 02:11:11,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:11:11,082 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 127 transitions. [2023-02-18 02:11:11,082 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 02:11:11,082 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 127 transitions. [2023-02-18 02:11:11,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-18 02:11:11,083 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:11:11,084 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 02:11:11,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 02:11:11,288 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 02:11:11,288 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:11:11,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:11:11,289 INFO L85 PathProgramCache]: Analyzing trace with hash 145642443, now seen corresponding path program 1 times [2023-02-18 02:11:11,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:11:11,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209312518] [2023-02-18 02:11:11,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:11,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:11:11,295 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:11:11,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009879211] [2023-02-18 02:11:11,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:11,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:11:11,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:11:11,296 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 02:11:11,298 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 02:11:11,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:11:11,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 02:11:11,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:11:11,410 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 02:11:11,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:11:11,459 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 02:11:11,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:11:11,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209312518] [2023-02-18 02:11:11,460 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:11:11,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009879211] [2023-02-18 02:11:11,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009879211] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 02:11:11,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 02:11:11,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 16 [2023-02-18 02:11:11,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397625601] [2023-02-18 02:11:11,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:11:11,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 02:11:11,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:11:11,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 02:11:11,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-02-18 02:11:11,462 INFO L87 Difference]: Start difference. First operand 101 states and 127 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 02:11:11,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:11:11,506 INFO L93 Difference]: Finished difference Result 122 states and 157 transitions. [2023-02-18 02:11:11,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 02:11:11,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2023-02-18 02:11:11,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:11:11,507 INFO L225 Difference]: With dead ends: 122 [2023-02-18 02:11:11,507 INFO L226 Difference]: Without dead ends: 120 [2023-02-18 02:11:11,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-02-18 02:11:11,508 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 02:11:11,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 124 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 02:11:11,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-02-18 02:11:11,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2023-02-18 02:11:11,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 77 states have internal predecessors, (87), 33 states have call successors, (33), 9 states have call predecessors, (33), 9 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2023-02-18 02:11:11,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 152 transitions. [2023-02-18 02:11:11,533 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 152 transitions. Word has length 48 [2023-02-18 02:11:11,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:11:11,534 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 152 transitions. [2023-02-18 02:11:11,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 02:11:11,534 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 152 transitions. [2023-02-18 02:11:11,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-18 02:11:11,534 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:11:11,534 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 02:11:11,541 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 02:11:11,739 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 02:11:11,739 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:11:11,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:11:11,739 INFO L85 PathProgramCache]: Analyzing trace with hash -828341661, now seen corresponding path program 1 times [2023-02-18 02:11:11,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:11:11,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823364709] [2023-02-18 02:11:11,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:11,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:11:11,758 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:11:11,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444521879] [2023-02-18 02:11:11,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:11,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:11:11,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:11:11,759 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 02:11:11,761 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 02:11:11,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:11:11,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-18 02:11:11,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:11:11,909 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 02:11:11,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:11:12,434 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 02:11:12,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:11:12,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823364709] [2023-02-18 02:11:12,434 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:11:12,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444521879] [2023-02-18 02:11:12,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444521879] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:11:12,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:11:12,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-02-18 02:11:12,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193357907] [2023-02-18 02:11:12,435 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:11:12,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 02:11:12,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:11:12,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 02:11:12,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-02-18 02:11:12,436 INFO L87 Difference]: Start difference. First operand 117 states and 152 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 02:11:20,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:11:20,793 INFO L93 Difference]: Finished difference Result 337 states and 468 transitions. [2023-02-18 02:11:20,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-18 02:11:20,794 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 02:11:20,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:11:20,795 INFO L225 Difference]: With dead ends: 337 [2023-02-18 02:11:20,795 INFO L226 Difference]: Without dead ends: 249 [2023-02-18 02:11:20,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=497, Invalid=2365, Unknown=0, NotChecked=0, Total=2862 [2023-02-18 02:11:20,796 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 182 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-02-18 02:11:20,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 272 Invalid, 1743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1446 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-02-18 02:11:20,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-02-18 02:11:20,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 206. [2023-02-18 02:11:20,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 135 states have (on average 1.1851851851851851) internal successors, (160), 138 states have internal predecessors, (160), 57 states have call successors, (57), 13 states have call predecessors, (57), 13 states have return successors, (56), 54 states have call predecessors, (56), 56 states have call successors, (56) [2023-02-18 02:11:20,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 273 transitions. [2023-02-18 02:11:20,862 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 273 transitions. Word has length 60 [2023-02-18 02:11:20,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:11:20,862 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 273 transitions. [2023-02-18 02:11:20,862 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 02:11:20,862 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 273 transitions. [2023-02-18 02:11:20,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-18 02:11:20,863 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:11:20,863 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 02:11:20,869 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 02:11:21,068 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 02:11:21,068 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:11:21,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:11:21,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1439093215, now seen corresponding path program 1 times [2023-02-18 02:11:21,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:11:21,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730241678] [2023-02-18 02:11:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:21,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:11:21,082 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:11:21,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362840934] [2023-02-18 02:11:21,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:21,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:11:21,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:11:21,083 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 02:11:21,085 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 02:11:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:11:21,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 02:11:21,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:11:21,428 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 02:11:21,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:11:21,801 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 02:11:21,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:11:21,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730241678] [2023-02-18 02:11:21,802 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:11:21,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362840934] [2023-02-18 02:11:21,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362840934] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:11:21,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:11:21,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 23 [2023-02-18 02:11:21,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613121928] [2023-02-18 02:11:21,803 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:11:21,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 02:11:21,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:11:21,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 02:11:21,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2023-02-18 02:11:21,804 INFO L87 Difference]: Start difference. First operand 206 states and 273 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 02:11:35,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:11:35,384 INFO L93 Difference]: Finished difference Result 328 states and 460 transitions. [2023-02-18 02:11:35,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-18 02:11:35,384 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 02:11:35,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:11:35,386 INFO L225 Difference]: With dead ends: 328 [2023-02-18 02:11:35,386 INFO L226 Difference]: Without dead ends: 326 [2023-02-18 02:11:35,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=424, Invalid=2126, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 02:11:35,387 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 144 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-02-18 02:11:35,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 429 Invalid, 1790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-02-18 02:11:35,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2023-02-18 02:11:35,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 214. [2023-02-18 02:11:35,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 141 states have (on average 1.177304964539007) internal successors, (166), 144 states have internal predecessors, (166), 57 states have call successors, (57), 15 states have call predecessors, (57), 15 states have return successors, (56), 54 states have call predecessors, (56), 56 states have call successors, (56) [2023-02-18 02:11:35,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 279 transitions. [2023-02-18 02:11:35,454 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 279 transitions. Word has length 68 [2023-02-18 02:11:35,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:11:35,454 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 279 transitions. [2023-02-18 02:11:35,454 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 02:11:35,454 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 279 transitions. [2023-02-18 02:11:35,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-18 02:11:35,455 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:11:35,455 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 02:11:35,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 02:11:35,660 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 02:11:35,660 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:11:35,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:11:35,661 INFO L85 PathProgramCache]: Analyzing trace with hash 798002477, now seen corresponding path program 2 times [2023-02-18 02:11:35,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:11:35,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688481835] [2023-02-18 02:11:35,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:35,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:11:35,675 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:11:35,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1145421151] [2023-02-18 02:11:35,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 02:11:35,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:11:35,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:11:35,682 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 02:11:35,683 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 02:11:35,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 02:11:35,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:11:35,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 02:11:35,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:11:35,734 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 02:11:35,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 02:11:35,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:11:35,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688481835] [2023-02-18 02:11:35,735 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:11:35,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145421151] [2023-02-18 02:11:35,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145421151] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:11:35,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:11:35,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 02:11:35,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317970334] [2023-02-18 02:11:35,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:11:35,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 02:11:35,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:11:35,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 02:11:35,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 02:11:35,737 INFO L87 Difference]: Start difference. First operand 214 states and 279 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (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 02:11:35,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:11:35,846 INFO L93 Difference]: Finished difference Result 386 states and 519 transitions. [2023-02-18 02:11:35,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 02:11:35,847 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 02:11:35,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:11:35,848 INFO L225 Difference]: With dead ends: 386 [2023-02-18 02:11:35,848 INFO L226 Difference]: Without dead ends: 256 [2023-02-18 02:11:35,849 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 02:11:35,849 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 02:11:35,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 97 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 02:11:35,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-02-18 02:11:35,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 247. [2023-02-18 02:11:35,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 156 states have (on average 1.1730769230769231) internal successors, (183), 158 states have internal predecessors, (183), 75 states have call successors, (75), 15 states have call predecessors, (75), 15 states have return successors, (74), 73 states have call predecessors, (74), 74 states have call successors, (74) [2023-02-18 02:11:35,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 332 transitions. [2023-02-18 02:11:35,931 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 332 transitions. Word has length 73 [2023-02-18 02:11:35,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:11:35,931 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 332 transitions. [2023-02-18 02:11:35,932 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 02:11:35,932 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 332 transitions. [2023-02-18 02:11:35,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-18 02:11:35,932 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:11:35,932 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 02:11:35,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 02:11:36,137 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 02:11:36,137 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:11:36,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:11:36,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1622368081, now seen corresponding path program 3 times [2023-02-18 02:11:36,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:11:36,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530559351] [2023-02-18 02:11:36,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:36,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:11:36,143 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:11:36,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579993537] [2023-02-18 02:11:36,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 02:11:36,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:11:36,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:11:36,150 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 02:11:36,150 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 02:11:36,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 02:11:36,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:11:36,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-18 02:11:36,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:11:36,293 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-18 02:11:36,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:11:37,054 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 02:11:37,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:11:37,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530559351] [2023-02-18 02:11:37,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:11:37,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579993537] [2023-02-18 02:11:37,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579993537] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:11:37,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:11:37,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2023-02-18 02:11:37,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301247670] [2023-02-18 02:11:37,055 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:11:37,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-18 02:11:37,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:11:37,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-18 02:11:37,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2023-02-18 02:11:37,056 INFO L87 Difference]: Start difference. First operand 247 states and 332 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-18 02:11:47,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:11:47,997 INFO L93 Difference]: Finished difference Result 382 states and 520 transitions. [2023-02-18 02:11:47,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-18 02:11:47,998 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 73 [2023-02-18 02:11:47,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:11:48,000 INFO L225 Difference]: With dead ends: 382 [2023-02-18 02:11:48,000 INFO L226 Difference]: Without dead ends: 380 [2023-02-18 02:11:48,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=499, Invalid=2153, Unknown=0, NotChecked=0, Total=2652 [2023-02-18 02:11:48,002 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 206 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 1360 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 1360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2023-02-18 02:11:48,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 390 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 1360 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2023-02-18 02:11:48,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-02-18 02:11:48,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 315. [2023-02-18 02:11:48,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 198 states have (on average 1.1767676767676767) internal successors, (233), 199 states have internal predecessors, (233), 97 states have call successors, (97), 19 states have call predecessors, (97), 19 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2023-02-18 02:11:48,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 426 transitions. [2023-02-18 02:11:48,141 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 426 transitions. Word has length 73 [2023-02-18 02:11:48,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:11:48,141 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 426 transitions. [2023-02-18 02:11:48,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-18 02:11:48,141 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 426 transitions. [2023-02-18 02:11:48,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-18 02:11:48,143 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:11:48,143 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 02:11:48,150 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 02:11:48,350 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 02:11:48,350 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:11:48,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:11:48,351 INFO L85 PathProgramCache]: Analyzing trace with hash 160585404, now seen corresponding path program 1 times [2023-02-18 02:11:48,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:11:48,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144723420] [2023-02-18 02:11:48,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:48,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:11:48,360 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:11:48,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [319638572] [2023-02-18 02:11:48,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:11:48,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:11:48,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:11:48,361 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 02:11:48,362 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 02:11:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:11:48,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 82 conjunts are in the unsatisfiable core [2023-02-18 02:11:48,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:11:48,612 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-02-18 02:11:48,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:11:52,406 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 02:11:52,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:11:52,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144723420] [2023-02-18 02:11:52,407 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:11:52,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319638572] [2023-02-18 02:11:52,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319638572] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:11:52,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:11:52,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2023-02-18 02:11:52,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295368330] [2023-02-18 02:11:52,407 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:11:52,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 02:11:52,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:11:52,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 02:11:52,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 02:11:52,408 INFO L87 Difference]: Start difference. First operand 315 states and 426 transitions. Second operand has 33 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-02-18 02:12:02,842 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 02:12:10,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:12:13,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:12:22,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:12:22,993 INFO L93 Difference]: Finished difference Result 502 states and 696 transitions. [2023-02-18 02:12:22,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-02-18 02:12:22,997 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 87 [2023-02-18 02:12:22,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:12:22,999 INFO L225 Difference]: With dead ends: 502 [2023-02-18 02:12:23,000 INFO L226 Difference]: Without dead ends: 494 [2023-02-18 02:12:23,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 138 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2365 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1499, Invalid=6873, Unknown=0, NotChecked=0, Total=8372 [2023-02-18 02:12:23,002 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 322 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 581 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 3181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 581 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.9s IncrementalHoareTripleChecker+Time [2023-02-18 02:12:23,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 436 Invalid, 3181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [581 Valid, 2598 Invalid, 2 Unknown, 0 Unchecked, 24.9s Time] [2023-02-18 02:12:23,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2023-02-18 02:12:23,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 463. [2023-02-18 02:12:23,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 290 states have (on average 1.196551724137931) internal successors, (347), 291 states have internal predecessors, (347), 149 states have call successors, (149), 23 states have call predecessors, (149), 23 states have return successors, (148), 148 states have call predecessors, (148), 148 states have call successors, (148) [2023-02-18 02:12:23,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 644 transitions. [2023-02-18 02:12:23,359 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 644 transitions. Word has length 87 [2023-02-18 02:12:23,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:12:23,359 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 644 transitions. [2023-02-18 02:12:23,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-02-18 02:12:23,360 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 644 transitions. [2023-02-18 02:12:23,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-02-18 02:12:23,360 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:12:23,361 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 02:12:23,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-18 02:12:23,565 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 02:12:23,565 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:12:23,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:12:23,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1330396859, now seen corresponding path program 2 times [2023-02-18 02:12:23,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:12:23,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079225381] [2023-02-18 02:12:23,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:12:23,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:12:23,579 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:12:23,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2122972120] [2023-02-18 02:12:23,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 02:12:23,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:12:23,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:12:23,580 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 02:12:23,583 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 02:12:23,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 02:12:23,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:12:23,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 02:12:23,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:12:23,668 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 02:12:23,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:12:23,702 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 02:12:23,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:12:23,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079225381] [2023-02-18 02:12:23,702 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:12:23,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122972120] [2023-02-18 02:12:23,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122972120] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:12:23,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:12:23,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2023-02-18 02:12:23,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401423771] [2023-02-18 02:12:23,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:12:23,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 02:12:23,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:12:23,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 02:12:23,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-18 02:12:23,704 INFO L87 Difference]: Start difference. First operand 463 states and 644 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 02:12:24,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:12:24,520 INFO L93 Difference]: Finished difference Result 555 states and 769 transitions. [2023-02-18 02:12:24,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 02:12:24,521 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 02:12:24,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:12:24,523 INFO L225 Difference]: With dead ends: 555 [2023-02-18 02:12:24,523 INFO L226 Difference]: Without dead ends: 548 [2023-02-18 02:12:24,523 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 02:12:24,524 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 81 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 02:12:24,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 360 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 02:12:24,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2023-02-18 02:12:24,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 426. [2023-02-18 02:12:24,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 261 states have (on average 1.2030651340996168) internal successors, (314), 262 states have internal predecessors, (314), 141 states have call successors, (141), 23 states have call predecessors, (141), 23 states have return successors, (140), 140 states have call predecessors, (140), 140 states have call successors, (140) [2023-02-18 02:12:24,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 595 transitions. [2023-02-18 02:12:24,862 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 595 transitions. Word has length 95 [2023-02-18 02:12:24,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:12:24,862 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 595 transitions. [2023-02-18 02:12:24,862 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 02:12:24,862 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 595 transitions. [2023-02-18 02:12:24,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-02-18 02:12:24,868 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:12:24,868 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 02:12:24,874 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 02:12:25,070 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 02:12:25,070 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:12:25,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:12:25,070 INFO L85 PathProgramCache]: Analyzing trace with hash 2024025072, now seen corresponding path program 2 times [2023-02-18 02:12:25,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:12:25,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023619507] [2023-02-18 02:12:25,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:12:25,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:12:25,076 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:12:25,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680298285] [2023-02-18 02:12:25,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 02:12:25,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:12:25,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:12:25,077 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 02:12:25,079 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 02:12:25,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 02:12:25,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:12:25,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-18 02:12:25,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:12:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 59 proven. 34 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-02-18 02:12:25,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:12:26,600 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 02:12:26,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:12:26,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023619507] [2023-02-18 02:12:26,600 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:12:26,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680298285] [2023-02-18 02:12:26,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680298285] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:12:26,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:12:26,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2023-02-18 02:12:26,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890759137] [2023-02-18 02:12:26,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:12:26,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-18 02:12:26,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:12:26,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-18 02:12:26,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2023-02-18 02:12:26,602 INFO L87 Difference]: Start difference. First operand 426 states and 595 transitions. Second operand has 32 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 10 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) [2023-02-18 02:13:02,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:13:02,254 INFO L93 Difference]: Finished difference Result 798 states and 1127 transitions. [2023-02-18 02:13:02,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-02-18 02:13:02,254 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 10 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) Word has length 107 [2023-02-18 02:13:02,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:13:02,257 INFO L225 Difference]: With dead ends: 798 [2023-02-18 02:13:02,257 INFO L226 Difference]: Without dead ends: 635 [2023-02-18 02:13:02,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2459 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=1604, Invalid=7138, Unknown=0, NotChecked=0, Total=8742 [2023-02-18 02:13:02,259 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 251 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 2273 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 2867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 2273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.2s IncrementalHoareTripleChecker+Time [2023-02-18 02:13:02,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 379 Invalid, 2867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 2273 Invalid, 0 Unknown, 0 Unchecked, 22.2s Time] [2023-02-18 02:13:02,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2023-02-18 02:13:02,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 577. [2023-02-18 02:13:02,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 348 states have (on average 1.206896551724138) internal successors, (420), 349 states have internal predecessors, (420), 201 states have call successors, (201), 27 states have call predecessors, (201), 27 states have return successors, (200), 200 states have call predecessors, (200), 200 states have call successors, (200) [2023-02-18 02:13:02,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 821 transitions. [2023-02-18 02:13:02,862 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 821 transitions. Word has length 107 [2023-02-18 02:13:02,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:13:02,862 INFO L495 AbstractCegarLoop]: Abstraction has 577 states and 821 transitions. [2023-02-18 02:13:02,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 10 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) [2023-02-18 02:13:02,863 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 821 transitions. [2023-02-18 02:13:02,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-18 02:13:02,865 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:13:02,865 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 02:13:02,874 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 02:13:03,070 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 02:13:03,070 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:13:03,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:13:03,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1576994048, now seen corresponding path program 1 times [2023-02-18 02:13:03,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:13:03,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899626307] [2023-02-18 02:13:03,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:13:03,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:13:03,076 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:13:03,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [940270891] [2023-02-18 02:13:03,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:13:03,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:13:03,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:13:03,080 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 02:13:03,084 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 02:13:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:13:03,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-18 02:13:03,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:13:03,277 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 02:13:03,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:13:03,602 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 02:13:03,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:13:03,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899626307] [2023-02-18 02:13:03,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:13:03,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940270891] [2023-02-18 02:13:03,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940270891] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:13:03,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:13:03,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 27 [2023-02-18 02:13:03,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276333633] [2023-02-18 02:13:03,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:13:03,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 02:13:03,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:13:03,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 02:13:03,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2023-02-18 02:13:03,603 INFO L87 Difference]: Start difference. First operand 577 states and 821 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 02:13:11,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:13:11,060 INFO L93 Difference]: Finished difference Result 1217 states and 1839 transitions. [2023-02-18 02:13:11,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-02-18 02:13:11,060 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 02:13:11,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:13:11,064 INFO L225 Difference]: With dead ends: 1217 [2023-02-18 02:13:11,064 INFO L226 Difference]: Without dead ends: 1130 [2023-02-18 02:13:11,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3890 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2207, Invalid=8923, Unknown=0, NotChecked=0, Total=11130 [2023-02-18 02:13:11,067 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 252 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 2304 mSolverCounterSat, 700 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1149 SdHoareTripleChecker+Invalid, 3004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 700 IncrementalHoareTripleChecker+Valid, 2304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-02-18 02:13:11,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 1149 Invalid, 3004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [700 Valid, 2304 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-02-18 02:13:11,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2023-02-18 02:13:12,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 931. [2023-02-18 02:13:12,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 509 states have (on average 1.2514734774066798) internal successors, (637), 510 states have internal predecessors, (637), 389 states have call successors, (389), 32 states have call predecessors, (389), 32 states have return successors, (388), 388 states have call predecessors, (388), 388 states have call successors, (388) [2023-02-18 02:13:12,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1414 transitions. [2023-02-18 02:13:12,156 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1414 transitions. Word has length 120 [2023-02-18 02:13:12,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:13:12,157 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 1414 transitions. [2023-02-18 02:13:12,157 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 02:13:12,157 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1414 transitions. [2023-02-18 02:13:12,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-18 02:13:12,158 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:13:12,158 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 02:13:12,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-18 02:13:12,363 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 02:13:12,363 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:13:12,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:13:12,364 INFO L85 PathProgramCache]: Analyzing trace with hash -843376510, now seen corresponding path program 2 times [2023-02-18 02:13:12,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:13:12,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372849769] [2023-02-18 02:13:12,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:13:12,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:13:12,371 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:13:12,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187629030] [2023-02-18 02:13:12,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 02:13:12,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:13:12,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:13:12,385 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 02:13:12,421 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 02:13:12,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 02:13:12,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:13:12,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 02:13:12,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:13:12,611 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 02:13:12,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:13:13,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:13:13,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372849769] [2023-02-18 02:13:13,088 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:13:13,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187629030] [2023-02-18 02:13:13,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187629030] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 02:13:13,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 02:13:13,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-18 02:13:13,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97418752] [2023-02-18 02:13:13,089 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 02:13:13,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 02:13:13,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:13:13,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 02:13:13,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2023-02-18 02:13:13,090 INFO L87 Difference]: Start difference. First operand 931 states and 1414 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 02:13:15,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:13:15,090 INFO L93 Difference]: Finished difference Result 1100 states and 1650 transitions. [2023-02-18 02:13:15,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 02:13:15,091 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 02:13:15,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:13:15,095 INFO L225 Difference]: With dead ends: 1100 [2023-02-18 02:13:15,095 INFO L226 Difference]: Without dead ends: 945 [2023-02-18 02:13:15,096 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 02:13:15,096 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 95 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 02:13:15,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 461 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 02:13:15,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2023-02-18 02:13:16,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 931. [2023-02-18 02:13:16,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 509 states have (on average 1.2495088408644401) internal successors, (636), 510 states have internal predecessors, (636), 389 states have call successors, (389), 32 states have call predecessors, (389), 32 states have return successors, (388), 388 states have call predecessors, (388), 388 states have call successors, (388) [2023-02-18 02:13:16,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1413 transitions. [2023-02-18 02:13:16,171 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1413 transitions. Word has length 120 [2023-02-18 02:13:16,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:13:16,171 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 1413 transitions. [2023-02-18 02:13:16,171 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 02:13:16,171 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1413 transitions. [2023-02-18 02:13:16,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-02-18 02:13:16,177 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:13:16,178 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 02:13:16,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-18 02:13:16,381 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 02:13:16,382 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:13:16,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:13:16,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1948772218, now seen corresponding path program 3 times [2023-02-18 02:13:16,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:13:16,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096420916] [2023-02-18 02:13:16,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:13:16,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:13:16,388 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:13:16,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1701544838] [2023-02-18 02:13:16,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 02:13:16,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:13:16,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:13:16,392 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 02:13:16,392 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 02:13:16,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-18 02:13:16,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:13:16,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 02:13:16,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:13:16,647 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 02:13:16,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:13:17,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:13:17,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096420916] [2023-02-18 02:13:17,117 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:13:17,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701544838] [2023-02-18 02:13:17,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701544838] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 02:13:17,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 02:13:17,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-02-18 02:13:17,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322277554] [2023-02-18 02:13:17,118 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 02:13:17,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 02:13:17,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:13:17,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 02:13:17,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2023-02-18 02:13:17,120 INFO L87 Difference]: Start difference. First operand 931 states and 1413 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 02:13:19,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:13:19,722 INFO L93 Difference]: Finished difference Result 1349 states and 2041 transitions. [2023-02-18 02:13:19,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-18 02:13:19,723 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 02:13:19,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:13:19,726 INFO L225 Difference]: With dead ends: 1349 [2023-02-18 02:13:19,726 INFO L226 Difference]: Without dead ends: 1194 [2023-02-18 02:13:19,727 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 02:13:19,728 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 109 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-18 02:13:19,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 493 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-18 02:13:19,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2023-02-18 02:13:20,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1033. [2023-02-18 02:13:20,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 571 states have (on average 1.2469352014010509) internal successors, (712), 572 states have internal predecessors, (712), 429 states have call successors, (429), 32 states have call predecessors, (429), 32 states have return successors, (428), 428 states have call predecessors, (428), 428 states have call successors, (428) [2023-02-18 02:13:20,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1569 transitions. [2023-02-18 02:13:20,934 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1569 transitions. Word has length 125 [2023-02-18 02:13:20,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:13:20,934 INFO L495 AbstractCegarLoop]: Abstraction has 1033 states and 1569 transitions. [2023-02-18 02:13:20,934 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 02:13:20,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1569 transitions. [2023-02-18 02:13:20,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-02-18 02:13:20,936 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:13:20,936 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 02:13:20,943 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 02:13:21,142 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 02:13:21,142 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:13:21,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:13:21,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1192369783, now seen corresponding path program 3 times [2023-02-18 02:13:21,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:13:21,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343373468] [2023-02-18 02:13:21,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:13:21,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:13:21,157 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:13:21,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516348364] [2023-02-18 02:13:21,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 02:13:21,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:13:21,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:13:21,159 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 02:13:21,161 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 02:13:21,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-18 02:13:21,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:13:21,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 95 conjunts are in the unsatisfiable core [2023-02-18 02:13:21,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:13:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 114 proven. 64 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2023-02-18 02:13:22,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:13:26,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:13:26,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343373468] [2023-02-18 02:13:26,844 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:13:26,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516348364] [2023-02-18 02:13:26,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516348364] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 02:13:26,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 02:13:26,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-02-18 02:13:26,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394339744] [2023-02-18 02:13:26,844 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 02:13:26,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 02:13:26,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:13:26,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 02:13:26,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1299, Unknown=1, NotChecked=0, Total=1560 [2023-02-18 02:13:26,846 INFO L87 Difference]: Start difference. First operand 1033 states and 1569 transitions. Second operand has 26 states, 25 states have (on average 1.76) internal successors, (44), 22 states have internal predecessors, (44), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2023-02-18 02:13:29,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:13:29,653 INFO L93 Difference]: Finished difference Result 1288 states and 1912 transitions. [2023-02-18 02:13:29,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 02:13:29,655 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.76) internal successors, (44), 22 states have internal predecessors, (44), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 134 [2023-02-18 02:13:29,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:13:29,658 INFO L225 Difference]: With dead ends: 1288 [2023-02-18 02:13:29,658 INFO L226 Difference]: Without dead ends: 966 [2023-02-18 02:13:29,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 146 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=344, Invalid=1817, Unknown=1, NotChecked=0, Total=2162 [2023-02-18 02:13:29,660 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 83 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-18 02:13:29,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 270 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-18 02:13:29,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2023-02-18 02:13:30,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 953. [2023-02-18 02:13:30,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 534 states have (on average 1.2322097378277153) internal successors, (658), 535 states have internal predecessors, (658), 385 states have call successors, (385), 33 states have call predecessors, (385), 33 states have return successors, (384), 384 states have call predecessors, (384), 384 states have call successors, (384) [2023-02-18 02:13:30,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1427 transitions. [2023-02-18 02:13:30,771 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1427 transitions. Word has length 134 [2023-02-18 02:13:30,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:13:30,771 INFO L495 AbstractCegarLoop]: Abstraction has 953 states and 1427 transitions. [2023-02-18 02:13:30,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.76) internal successors, (44), 22 states have internal predecessors, (44), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2023-02-18 02:13:30,772 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1427 transitions. [2023-02-18 02:13:30,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-02-18 02:13:30,773 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:13:30,773 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 02:13:30,780 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 02:13:30,978 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 02:13:30,978 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:13:30,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:13:30,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1841111375, now seen corresponding path program 4 times [2023-02-18 02:13:30,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:13:30,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211048559] [2023-02-18 02:13:30,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:13:30,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:13:30,985 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:13:30,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964405272] [2023-02-18 02:13:30,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 02:13:30,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:13:30,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:13:30,987 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 02:13:30,988 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 02:13:31,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 02:13:31,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:13:31,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 91 conjunts are in the unsatisfiable core [2023-02-18 02:13:31,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:13:31,326 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 02:13:31,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:13:38,214 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 02:13:38,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:13:38,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211048559] [2023-02-18 02:13:38,214 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:13:38,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964405272] [2023-02-18 02:13:38,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964405272] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:13:38,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:13:38,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19] total 39 [2023-02-18 02:13:38,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910966845] [2023-02-18 02:13:38,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:13:38,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-18 02:13:38,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:13:38,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-18 02:13:38,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 02:13:38,216 INFO L87 Difference]: Start difference. First operand 953 states and 1427 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 02:13:54,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:13:56,956 WARN L539 Checker$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 02:13:58,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:14:16,594 WARN L539 Checker$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 02:14:18,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:14:20,605 WARN L539 Checker$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 02:14:22,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:14:32,135 WARN L539 Checker$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 02:14:42,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:14:43,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:15:03,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:15:09,004 WARN L539 Checker$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 02:15:31,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:15:44,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:15:56,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:15:59,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:15:59,343 INFO L93 Difference]: Finished difference Result 1192 states and 1761 transitions. [2023-02-18 02:15:59,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-02-18 02:15:59,344 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 02:15:59,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:15:59,348 INFO L225 Difference]: With dead ends: 1192 [2023-02-18 02:15:59,349 INFO L226 Difference]: Without dead ends: 1188 [2023-02-18 02:15:59,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 228 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4713 ImplicationChecksByTransitivity, 46.5s TimeCoverageRelationStatistics Valid=2764, Invalid=13235, Unknown=3, NotChecked=0, Total=16002 [2023-02-18 02:15:59,352 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 336 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 3779 mSolverCounterSat, 998 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 98.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 4787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 998 IncrementalHoareTripleChecker+Valid, 3779 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 99.2s IncrementalHoareTripleChecker+Time [2023-02-18 02:15:59,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 638 Invalid, 4787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [998 Valid, 3779 Invalid, 10 Unknown, 0 Unchecked, 99.2s Time] [2023-02-18 02:15:59,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2023-02-18 02:16:01,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1114. [2023-02-18 02:16:01,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 622 states have (on average 1.2379421221864952) internal successors, (770), 623 states have internal predecessors, (770), 449 states have call successors, (449), 42 states have call predecessors, (449), 42 states have return successors, (448), 448 states have call predecessors, (448), 448 states have call successors, (448) [2023-02-18 02:16:01,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1667 transitions. [2023-02-18 02:16:01,267 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1667 transitions. Word has length 134 [2023-02-18 02:16:01,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:16:01,267 INFO L495 AbstractCegarLoop]: Abstraction has 1114 states and 1667 transitions. [2023-02-18 02:16:01,267 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 02:16:01,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1667 transitions. [2023-02-18 02:16:01,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-02-18 02:16:01,269 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:16:01,270 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 02:16:01,274 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 02:16:01,474 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 02:16:01,475 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:16:01,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:16:01,475 INFO L85 PathProgramCache]: Analyzing trace with hash -969870237, now seen corresponding path program 4 times [2023-02-18 02:16:01,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:16:01,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294145930] [2023-02-18 02:16:01,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:16:01,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:16:01,481 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:16:01,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585656271] [2023-02-18 02:16:01,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 02:16:01,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:16:01,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:16:01,482 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 02:16:01,487 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 02:16:01,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 02:16:01,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:16:01,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 02:16:01,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:16:01,703 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 02:16:01,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:16:02,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:16:02,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294145930] [2023-02-18 02:16:02,195 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:16:02,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585656271] [2023-02-18 02:16:02,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585656271] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 02:16:02,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 02:16:02,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-02-18 02:16:02,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329592115] [2023-02-18 02:16:02,195 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 02:16:02,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 02:16:02,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:16:02,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 02:16:02,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2023-02-18 02:16:02,196 INFO L87 Difference]: Start difference. First operand 1114 states and 1667 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 02:16:05,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:16:05,817 INFO L93 Difference]: Finished difference Result 1493 states and 2265 transitions. [2023-02-18 02:16:05,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-18 02:16:05,817 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 02:16:05,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:16:05,821 INFO L225 Difference]: With dead ends: 1493 [2023-02-18 02:16:05,821 INFO L226 Difference]: Without dead ends: 1342 [2023-02-18 02:16:05,822 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 02:16:05,823 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 128 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-18 02:16:05,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 553 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-18 02:16:05,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2023-02-18 02:16:07,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1134. [2023-02-18 02:16:07,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 634 states have (on average 1.2365930599369086) internal successors, (784), 635 states have internal predecessors, (784), 457 states have call successors, (457), 42 states have call predecessors, (457), 42 states have return successors, (456), 456 states have call predecessors, (456), 456 states have call successors, (456) [2023-02-18 02:16:07,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 1697 transitions. [2023-02-18 02:16:07,784 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 1697 transitions. Word has length 142 [2023-02-18 02:16:07,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:16:07,784 INFO L495 AbstractCegarLoop]: Abstraction has 1134 states and 1697 transitions. [2023-02-18 02:16:07,784 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 02:16:07,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 1697 transitions. [2023-02-18 02:16:07,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-02-18 02:16:07,786 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:16:07,786 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 02:16:07,791 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 02:16:07,991 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 02:16:07,991 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:16:07,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:16:07,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1917326542, now seen corresponding path program 5 times [2023-02-18 02:16:07,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:16:07,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92133443] [2023-02-18 02:16:07,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:16:07,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:16:07,997 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:16:07,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1188552432] [2023-02-18 02:16:07,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 02:16:07,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:16:07,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:16:07,998 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 02:16:08,000 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 02:16:08,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-18 02:16:08,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:16:08,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 124 conjunts are in the unsatisfiable core [2023-02-18 02:16:08,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:16:08,795 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 02:16:08,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:16:11,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:16:11,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92133443] [2023-02-18 02:16:11,963 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:16:11,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188552432] [2023-02-18 02:16:11,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188552432] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 02:16:11,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 02:16:11,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2023-02-18 02:16:11,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264527007] [2023-02-18 02:16:11,963 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 02:16:11,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 02:16:11,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:16:11,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 02:16:11,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1679, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 02:16:11,965 INFO L87 Difference]: Start difference. First operand 1134 states and 1697 transitions. Second operand has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 25 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) [2023-02-18 02:16:16,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:16:16,103 INFO L93 Difference]: Finished difference Result 1413 states and 2099 transitions. [2023-02-18 02:16:16,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-18 02:16:16,104 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 25 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) Word has length 142 [2023-02-18 02:16:16,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:16:16,108 INFO L225 Difference]: With dead ends: 1413 [2023-02-18 02:16:16,108 INFO L226 Difference]: Without dead ends: 1241 [2023-02-18 02:16:16,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=556, Invalid=3104, Unknown=0, NotChecked=0, Total=3660 [2023-02-18 02:16:16,109 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 94 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 2008 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 2116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-18 02:16:16,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 436 Invalid, 2116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2008 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-18 02:16:16,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2023-02-18 02:16:18,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1231. [2023-02-18 02:16:18,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 686 states have (on average 1.2361516034985423) internal successors, (848), 687 states have internal predecessors, (848), 497 states have call successors, (497), 47 states have call predecessors, (497), 47 states have return successors, (496), 496 states have call predecessors, (496), 496 states have call successors, (496) [2023-02-18 02:16:18,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1841 transitions. [2023-02-18 02:16:18,254 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1841 transitions. Word has length 142 [2023-02-18 02:16:18,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:16:18,254 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 1841 transitions. [2023-02-18 02:16:18,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 25 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) [2023-02-18 02:16:18,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1841 transitions. [2023-02-18 02:16:18,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-02-18 02:16:18,256 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:16:18,257 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 02:16:18,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-18 02:16:18,461 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 02:16:18,461 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:16:18,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:16:18,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1075315432, now seen corresponding path program 6 times [2023-02-18 02:16:18,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:16:18,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940571469] [2023-02-18 02:16:18,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:16:18,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:16:18,467 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:16:18,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311563539] [2023-02-18 02:16:18,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 02:16:18,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:16:18,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:16:18,469 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 02:16:18,470 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 02:16:18,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-18 02:16:18,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:16:18,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 113 conjunts are in the unsatisfiable core [2023-02-18 02:16:18,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:16:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 69 proven. 138 refuted. 0 times theorem prover too weak. 413 trivial. 0 not checked. [2023-02-18 02:16:19,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:16:23,323 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 02:16:23,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:16:23,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940571469] [2023-02-18 02:16:23,324 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:16:23,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311563539] [2023-02-18 02:16:23,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311563539] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:16:23,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:16:23,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 17] total 42 [2023-02-18 02:16:23,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382926505] [2023-02-18 02:16:23,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:16:23,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-18 02:16:23,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:16:23,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-18 02:16:23,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1460, Unknown=0, NotChecked=0, Total=1722 [2023-02-18 02:16:23,326 INFO L87 Difference]: Start difference. First operand 1231 states and 1841 transitions. Second operand has 42 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 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 02:16:31,659 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 02:16:44,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:16:48,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 02:16:49,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 02:16:57,834 WARN L539 Checker$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 02:17:01,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 02:17:05,721 WARN L539 Checker$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 02:17:12,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:17:20,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 02:17:29,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 02:17:31,222 WARN L539 Checker$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 02:17:34,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 02:17:43,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 02:17:52,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 02:17:54,266 WARN L539 Checker$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 02:17:59,769 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 02:18:07,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:18:07,278 INFO L93 Difference]: Finished difference Result 1543 states and 2269 transitions. [2023-02-18 02:18:07,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-02-18 02:18:07,278 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 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 02:18:07,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:18:07,283 INFO L225 Difference]: With dead ends: 1543 [2023-02-18 02:18:07,283 INFO L226 Difference]: Without dead ends: 1528 [2023-02-18 02:18:07,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 254 SyntacticMatches, 3 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4217 ImplicationChecksByTransitivity, 44.2s TimeCoverageRelationStatistics Valid=2198, Invalid=11840, Unknown=4, NotChecked=0, Total=14042 [2023-02-18 02:18:07,285 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 430 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 2904 mSolverCounterSat, 637 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 3552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 637 IncrementalHoareTripleChecker+Valid, 2904 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.7s IncrementalHoareTripleChecker+Time [2023-02-18 02:18:07,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 523 Invalid, 3552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [637 Valid, 2904 Invalid, 11 Unknown, 0 Unchecked, 60.7s Time] [2023-02-18 02:18:07,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2023-02-18 02:18:09,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1340. [2023-02-18 02:18:09,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 740 states have (on average 1.2351351351351352) internal successors, (914), 742 states have internal predecessors, (914), 544 states have call successors, (544), 55 states have call predecessors, (544), 55 states have return successors, (543), 542 states have call predecessors, (543), 543 states have call successors, (543) [2023-02-18 02:18:09,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 2001 transitions. [2023-02-18 02:18:09,955 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 2001 transitions. Word has length 142 [2023-02-18 02:18:09,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:18:09,956 INFO L495 AbstractCegarLoop]: Abstraction has 1340 states and 2001 transitions. [2023-02-18 02:18:09,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 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 02:18:09,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 2001 transitions. [2023-02-18 02:18:09,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-02-18 02:18:09,958 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:18:09,958 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 02:18:09,963 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 02:18:10,163 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 02:18:10,167 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:18:10,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:18:10,167 INFO L85 PathProgramCache]: Analyzing trace with hash -2005711590, now seen corresponding path program 5 times [2023-02-18 02:18:10,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:18:10,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440281304] [2023-02-18 02:18:10,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:18:10,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:18:10,173 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:18:10,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1693856010] [2023-02-18 02:18:10,173 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 02:18:10,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:18:10,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:18:10,175 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 02:18:10,177 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 02:18:10,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-18 02:18:10,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 02:18:10,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 02:18:10,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:18:10,355 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 02:18:10,355 INFO L328 TraceCheckSpWp]: Computing backward predicates...