./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.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 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 10:22:49,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 10:22:49,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 10:22:49,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 10:22:49,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 10:22:49,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 10:22:49,748 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 10:22:49,750 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 10:22:49,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 10:22:49,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 10:22:49,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 10:22:49,757 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 10:22:49,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 10:22:49,759 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 10:22:49,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 10:22:49,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 10:22:49,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 10:22:49,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 10:22:49,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 10:22:49,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 10:22:49,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 10:22:49,768 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 10:22:49,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 10:22:49,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 10:22:49,775 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 10:22:49,775 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 10:22:49,775 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 10:22:49,776 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 10:22:49,776 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 10:22:49,777 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 10:22:49,778 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 10:22:49,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 10:22:49,779 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 10:22:49,780 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 10:22:49,780 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 10:22:49,780 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 10:22:49,781 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 10:22:49,781 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 10:22:49,781 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 10:22:49,782 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 10:22:49,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 10:22:49,783 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 10:22:49,803 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 10:22:49,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 10:22:49,804 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 10:22:49,804 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 10:22:49,805 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 10:22:49,805 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 10:22:49,805 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 10:22:49,806 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 10:22:49,806 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 10:22:49,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 10:22:49,806 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 10:22:49,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 10:22:49,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 10:22:49,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 10:22:49,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 10:22:49,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 10:22:49,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 10:22:49,807 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 10:22:49,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 10:22:49,808 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 10:22:49,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 10:22:49,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 10:22:49,808 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 10:22:49,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 10:22:49,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 10:22:49,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 10:22:49,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 10:22:49,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 10:22:49,809 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 10:22:49,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 10:22:49,809 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 10:22:49,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 10:22:49,810 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 10:22:49,810 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 10:22:49,810 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 10:22:49,810 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 [2023-02-15 10:22:50,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 10:22:50,042 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 10:22:50,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 10:22:50,044 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 10:22:50,044 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 10:22:50,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2023-02-15 10:22:50,993 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 10:22:51,132 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 10:22:51,133 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2023-02-15 10:22:51,138 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87827051b/0e84e14220d04bd7a877c0e448d86106/FLAG322c1d882 [2023-02-15 10:22:51,151 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87827051b/0e84e14220d04bd7a877c0e448d86106 [2023-02-15 10:22:51,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 10:22:51,154 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 10:22:51,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 10:22:51,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 10:22:51,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 10:22:51,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:22:51" (1/1) ... [2023-02-15 10:22:51,160 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a62925c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:51, skipping insertion in model container [2023-02-15 10:22:51,160 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:22:51" (1/1) ... [2023-02-15 10:22:51,165 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 10:22:51,186 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 10:22:51,275 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/bitvector/soft_float_3a.c.cil.c[728,741] [2023-02-15 10:22:51,310 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 10:22:51,316 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 10:22:51,323 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/bitvector/soft_float_3a.c.cil.c[728,741] [2023-02-15 10:22:51,343 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 10:22:51,352 INFO L208 MainTranslator]: Completed translation [2023-02-15 10:22:51,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:51 WrapperNode [2023-02-15 10:22:51,352 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 10:22:51,353 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 10:22:51,353 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 10:22:51,353 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 10:22:51,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:51" (1/1) ... [2023-02-15 10:22:51,363 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:51" (1/1) ... [2023-02-15 10:22:51,378 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 166 [2023-02-15 10:22:51,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 10:22:51,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 10:22:51,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 10:22:51,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 10:22:51,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:51" (1/1) ... [2023-02-15 10:22:51,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:51" (1/1) ... [2023-02-15 10:22:51,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:51" (1/1) ... [2023-02-15 10:22:51,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:51" (1/1) ... [2023-02-15 10:22:51,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:51" (1/1) ... [2023-02-15 10:22:51,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:51" (1/1) ... [2023-02-15 10:22:51,422 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:51" (1/1) ... [2023-02-15 10:22:51,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:51" (1/1) ... [2023-02-15 10:22:51,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 10:22:51,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 10:22:51,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 10:22:51,438 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 10:22:51,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:51" (1/1) ... [2023-02-15 10:22:51,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 10:22:51,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:22:51,460 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 10:22:51,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 10:22:51,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 10:22:51,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 10:22:51,555 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-02-15 10:22:51,555 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-02-15 10:22:51,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 10:22:51,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 10:22:51,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 10:22:51,556 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 10:22:51,628 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 10:22:51,630 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 10:22:51,929 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 10:22:51,935 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 10:22:51,935 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 10:22:51,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:22:51 BoogieIcfgContainer [2023-02-15 10:22:51,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 10:22:51,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 10:22:51,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 10:22:51,945 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 10:22:51,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 10:22:51" (1/3) ... [2023-02-15 10:22:51,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10939f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:22:51, skipping insertion in model container [2023-02-15 10:22:51,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:51" (2/3) ... [2023-02-15 10:22:51,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10939f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:22:51, skipping insertion in model container [2023-02-15 10:22:51,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:22:51" (3/3) ... [2023-02-15 10:22:51,948 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2023-02-15 10:22:51,962 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 10:22:51,962 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 10:22:52,006 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 10:22:52,011 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;@29cf070e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 10:22:52,011 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 10:22:52,014 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 65 states have (on average 1.6153846153846154) internal successors, (105), 67 states have internal predecessors, (105), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 10:22:52,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 10:22:52,022 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:52,022 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2023-02-15 10:22:52,023 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:52,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:52,027 INFO L85 PathProgramCache]: Analyzing trace with hash -674615112, now seen corresponding path program 1 times [2023-02-15 10:22:52,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:52,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544677396] [2023-02-15 10:22:52,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:52,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:52,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:52,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:52,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:52,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:52,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:22:52,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:52,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 10:22:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-15 10:22:52,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:52,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544677396] [2023-02-15 10:22:52,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544677396] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:22:52,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:22:52,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 10:22:52,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31958098] [2023-02-15 10:22:52,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:52,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 10:22:52,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:52,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 10:22:52,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 10:22:52,374 INFO L87 Difference]: Start difference. First operand has 74 states, 65 states have (on average 1.6153846153846154) internal successors, (105), 67 states have internal predecessors, (105), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2023-02-15 10:22:52,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:52,413 INFO L93 Difference]: Finished difference Result 150 states and 236 transitions. [2023-02-15 10:22:52,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 10:22:52,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 41 [2023-02-15 10:22:52,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:52,422 INFO L225 Difference]: With dead ends: 150 [2023-02-15 10:22:52,422 INFO L226 Difference]: Without dead ends: 68 [2023-02-15 10:22:52,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 10:22:52,427 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 4 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:52,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 210 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:22:52,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-15 10:22:52,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-02-15 10:22:52,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 61 states have internal predecessors, (91), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 10:22:52,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 100 transitions. [2023-02-15 10:22:52,457 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 100 transitions. Word has length 41 [2023-02-15 10:22:52,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:52,458 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 100 transitions. [2023-02-15 10:22:52,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2023-02-15 10:22:52,459 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 100 transitions. [2023-02-15 10:22:52,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 10:22:52,460 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:52,461 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2023-02-15 10:22:52,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 10:22:52,462 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:52,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:52,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1043963262, now seen corresponding path program 1 times [2023-02-15 10:22:52,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:52,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918617465] [2023-02-15 10:22:52,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:52,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:52,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:52,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:52,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:52,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:52,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:52,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:22:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:52,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 10:22:52,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:52,596 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-15 10:22:52,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:52,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918617465] [2023-02-15 10:22:52,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918617465] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:22:52,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:22:52,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 10:22:52,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372341287] [2023-02-15 10:22:52,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:52,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 10:22:52,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:52,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 10:22:52,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 10:22:52,601 INFO L87 Difference]: Start difference. First operand 68 states and 100 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2023-02-15 10:22:52,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:52,632 INFO L93 Difference]: Finished difference Result 78 states and 111 transitions. [2023-02-15 10:22:52,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 10:22:52,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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 [2023-02-15 10:22:52,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:52,634 INFO L225 Difference]: With dead ends: 78 [2023-02-15 10:22:52,634 INFO L226 Difference]: Without dead ends: 68 [2023-02-15 10:22:52,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 10:22:52,635 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 1 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:52,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 292 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:22:52,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-15 10:22:52,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-02-15 10:22:52,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 1.4754098360655739) internal successors, (90), 61 states have internal predecessors, (90), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 10:22:52,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 99 transitions. [2023-02-15 10:22:52,656 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 99 transitions. Word has length 43 [2023-02-15 10:22:52,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:52,656 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 99 transitions. [2023-02-15 10:22:52,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2023-02-15 10:22:52,657 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 99 transitions. [2023-02-15 10:22:52,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 10:22:52,661 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:52,661 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2023-02-15 10:22:52,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 10:22:52,661 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:52,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:52,662 INFO L85 PathProgramCache]: Analyzing trace with hash 234616636, now seen corresponding path program 1 times [2023-02-15 10:22:52,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:52,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243683787] [2023-02-15 10:22:52,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:52,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:52,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:52,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:52,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:22:52,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:52,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 10:22:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 10:22:52,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:52,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243683787] [2023-02-15 10:22:52,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243683787] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:22:52,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955716719] [2023-02-15 10:22:52,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:52,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:52,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:22:52,837 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:22:52,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 10:22:52,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:52,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 10:22:52,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:22:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 10:22:53,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:22:53,139 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 10:22:53,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955716719] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 10:22:53,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:22:53,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 8] total 14 [2023-02-15 10:22:53,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196175524] [2023-02-15 10:22:53,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:53,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 10:22:53,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:53,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 10:22:53,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-02-15 10:22:53,141 INFO L87 Difference]: Start difference. First operand 68 states and 99 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2023-02-15 10:22:53,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:53,193 INFO L93 Difference]: Finished difference Result 139 states and 204 transitions. [2023-02-15 10:22:53,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 10:22:53,194 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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 43 [2023-02-15 10:22:53,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:53,199 INFO L225 Difference]: With dead ends: 139 [2023-02-15 10:22:53,199 INFO L226 Difference]: Without dead ends: 100 [2023-02-15 10:22:53,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-02-15 10:22:53,203 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 41 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:53,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 454 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:22:53,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-15 10:22:53,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 74. [2023-02-15 10:22:53,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 66 states have (on average 1.4393939393939394) internal successors, (95), 66 states have internal predecessors, (95), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-15 10:22:53,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 108 transitions. [2023-02-15 10:22:53,220 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 108 transitions. Word has length 43 [2023-02-15 10:22:53,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:53,220 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 108 transitions. [2023-02-15 10:22:53,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2023-02-15 10:22:53,221 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 108 transitions. [2023-02-15 10:22:53,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 10:22:53,223 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:53,223 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2023-02-15 10:22:53,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 10:22:53,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:53,424 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:53,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:53,425 INFO L85 PathProgramCache]: Analyzing trace with hash -352189378, now seen corresponding path program 1 times [2023-02-15 10:22:53,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:53,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249536872] [2023-02-15 10:22:53,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:53,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:53,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:53,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:53,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:22:53,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:53,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 10:22:53,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:53,533 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 10:22:53,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:53,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249536872] [2023-02-15 10:22:53,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249536872] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:22:53,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987824807] [2023-02-15 10:22:53,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:53,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:53,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:22:53,543 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:22:53,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 10:22:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:53,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 10:22:53,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:22:53,698 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 10:22:53,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:22:53,784 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 10:22:53,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987824807] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:22:53,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:22:53,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 6] total 14 [2023-02-15 10:22:53,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123548252] [2023-02-15 10:22:53,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:22:53,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 10:22:53,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:53,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 10:22:53,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-02-15 10:22:53,794 INFO L87 Difference]: Start difference. First operand 74 states and 108 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-15 10:22:53,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:53,988 INFO L93 Difference]: Finished difference Result 215 states and 325 transitions. [2023-02-15 10:22:53,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 10:22:53,989 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 43 [2023-02-15 10:22:53,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:53,990 INFO L225 Difference]: With dead ends: 215 [2023-02-15 10:22:53,990 INFO L226 Difference]: Without dead ends: 144 [2023-02-15 10:22:53,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2023-02-15 10:22:53,991 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 164 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:53,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 737 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:22:53,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-02-15 10:22:54,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 127. [2023-02-15 10:22:54,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 116 states have (on average 1.4310344827586208) internal successors, (166), 115 states have internal predecessors, (166), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (15), 8 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-15 10:22:54,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 187 transitions. [2023-02-15 10:22:54,009 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 187 transitions. Word has length 43 [2023-02-15 10:22:54,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:54,010 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 187 transitions. [2023-02-15 10:22:54,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-15 10:22:54,010 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 187 transitions. [2023-02-15 10:22:54,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 10:22:54,011 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:54,011 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:54,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 10:22:54,216 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,SelfDestructingSolverStorable3 [2023-02-15 10:22:54,216 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:54,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:54,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1940694518, now seen corresponding path program 1 times [2023-02-15 10:22:54,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:54,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299577879] [2023-02-15 10:22:54,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:54,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:54,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:54,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:54,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:54,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-15 10:22:54,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:54,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-15 10:22:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 10:22:54,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:54,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299577879] [2023-02-15 10:22:54,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299577879] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:22:54,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725940130] [2023-02-15 10:22:54,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:54,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:54,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:22:54,274 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:22:54,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 10:22:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:54,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 10:22:54,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:22:54,336 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 10:22:54,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 10:22:54,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725940130] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:22:54,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 10:22:54,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-02-15 10:22:54,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028195840] [2023-02-15 10:22:54,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:54,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 10:22:54,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:54,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 10:22:54,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 10:22:54,339 INFO L87 Difference]: Start difference. First operand 127 states and 187 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 10:22:54,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:54,372 INFO L93 Difference]: Finished difference Result 256 states and 379 transitions. [2023-02-15 10:22:54,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 10:22:54,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2023-02-15 10:22:54,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:54,373 INFO L225 Difference]: With dead ends: 256 [2023-02-15 10:22:54,374 INFO L226 Difference]: Without dead ends: 136 [2023-02-15 10:22:54,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-15 10:22:54,375 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 20 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:54,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 252 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:22:54,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-15 10:22:54,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2023-02-15 10:22:54,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 120 states have (on average 1.425) internal successors, (171), 120 states have internal predecessors, (171), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-15 10:22:54,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 195 transitions. [2023-02-15 10:22:54,382 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 195 transitions. Word has length 48 [2023-02-15 10:22:54,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:54,382 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 195 transitions. [2023-02-15 10:22:54,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 10:22:54,382 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 195 transitions. [2023-02-15 10:22:54,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 10:22:54,383 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:54,383 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1] [2023-02-15 10:22:54,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 10:22:54,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:54,588 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:54,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:54,588 INFO L85 PathProgramCache]: Analyzing trace with hash -740139086, now seen corresponding path program 1 times [2023-02-15 10:22:54,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:54,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428920077] [2023-02-15 10:22:54,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:54,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:54,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:54,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:54,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:54,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:54,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:54,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 10:22:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:54,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 10:22:54,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:54,669 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 10:22:54,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:54,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428920077] [2023-02-15 10:22:54,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428920077] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:22:54,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44744296] [2023-02-15 10:22:54,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:54,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:54,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:22:54,671 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:22:54,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 10:22:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:54,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 10:22:54,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:22:54,740 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 10:22:54,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:22:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 10:22:54,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44744296] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:22:54,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:22:54,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-02-15 10:22:54,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249767922] [2023-02-15 10:22:54,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:22:54,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 10:22:54,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:54,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 10:22:54,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-15 10:22:54,796 INFO L87 Difference]: Start difference. First operand 132 states and 195 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 10:22:54,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:54,909 INFO L93 Difference]: Finished difference Result 330 states and 506 transitions. [2023-02-15 10:22:54,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 10:22:54,910 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2023-02-15 10:22:54,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:54,911 INFO L225 Difference]: With dead ends: 330 [2023-02-15 10:22:54,911 INFO L226 Difference]: Without dead ends: 205 [2023-02-15 10:22:54,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2023-02-15 10:22:54,912 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 170 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:54,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 447 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:22:54,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-02-15 10:22:54,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 146. [2023-02-15 10:22:54,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 134 states have (on average 1.455223880597015) internal successors, (195), 134 states have internal predecessors, (195), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-15 10:22:54,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 219 transitions. [2023-02-15 10:22:54,938 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 219 transitions. Word has length 51 [2023-02-15 10:22:54,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:54,938 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 219 transitions. [2023-02-15 10:22:54,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 10:22:54,938 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 219 transitions. [2023-02-15 10:22:54,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 10:22:54,939 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:54,939 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:54,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 10:22:55,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:55,140 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:55,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:55,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1188656450, now seen corresponding path program 1 times [2023-02-15 10:22:55,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:55,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920784037] [2023-02-15 10:22:55,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:55,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:55,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:55,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:55,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:55,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-15 10:22:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:55,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-15 10:22:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 10:22:55,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:55,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920784037] [2023-02-15 10:22:55,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920784037] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:22:55,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807204471] [2023-02-15 10:22:55,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:55,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:55,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:22:55,241 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:22:55,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 10:22:55,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:55,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 10:22:55,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:22:55,331 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 10:22:55,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:22:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-15 10:22:55,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807204471] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 10:22:55,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:22:55,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 7] total 13 [2023-02-15 10:22:55,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73969780] [2023-02-15 10:22:55,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:55,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 10:22:55,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:55,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 10:22:55,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-02-15 10:22:55,383 INFO L87 Difference]: Start difference. First operand 146 states and 219 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2023-02-15 10:22:55,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:55,424 INFO L93 Difference]: Finished difference Result 169 states and 243 transitions. [2023-02-15 10:22:55,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 10:22:55,424 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 53 [2023-02-15 10:22:55,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:55,425 INFO L225 Difference]: With dead ends: 169 [2023-02-15 10:22:55,425 INFO L226 Difference]: Without dead ends: 163 [2023-02-15 10:22:55,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-02-15 10:22:55,426 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 22 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:55,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 373 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:22:55,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-02-15 10:22:55,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2023-02-15 10:22:55,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 149 states have (on average 1.4161073825503356) internal successors, (211), 149 states have internal predecessors, (211), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-15 10:22:55,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 235 transitions. [2023-02-15 10:22:55,432 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 235 transitions. Word has length 53 [2023-02-15 10:22:55,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:55,432 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 235 transitions. [2023-02-15 10:22:55,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2023-02-15 10:22:55,432 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 235 transitions. [2023-02-15 10:22:55,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 10:22:55,432 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:55,433 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:55,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 10:22:55,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:55,637 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:55,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:55,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1245914752, now seen corresponding path program 1 times [2023-02-15 10:22:55,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:55,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485834533] [2023-02-15 10:22:55,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:55,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:55,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:55,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:55,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-15 10:22:55,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:55,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-15 10:22:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-15 10:22:55,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:55,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485834533] [2023-02-15 10:22:55,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485834533] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:22:55,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:22:55,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 10:22:55,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066712349] [2023-02-15 10:22:55,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:55,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 10:22:55,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:55,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 10:22:55,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 10:22:55,704 INFO L87 Difference]: Start difference. First operand 161 states and 235 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2023-02-15 10:22:55,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:55,724 INFO L93 Difference]: Finished difference Result 167 states and 240 transitions. [2023-02-15 10:22:55,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 10:22:55,725 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 53 [2023-02-15 10:22:55,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:55,728 INFO L225 Difference]: With dead ends: 167 [2023-02-15 10:22:55,728 INFO L226 Difference]: Without dead ends: 150 [2023-02-15 10:22:55,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-15 10:22:55,729 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 2 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:55,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 475 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:22:55,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-02-15 10:22:55,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2023-02-15 10:22:55,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 138 states have (on average 1.4202898550724639) internal successors, (196), 139 states have internal predecessors, (196), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-15 10:22:55,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 217 transitions. [2023-02-15 10:22:55,735 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 217 transitions. Word has length 53 [2023-02-15 10:22:55,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:55,735 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 217 transitions. [2023-02-15 10:22:55,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2023-02-15 10:22:55,736 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 217 transitions. [2023-02-15 10:22:55,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 10:22:55,736 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:55,736 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:55,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-15 10:22:55,737 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:55,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:55,738 INFO L85 PathProgramCache]: Analyzing trace with hash 660451629, now seen corresponding path program 1 times [2023-02-15 10:22:55,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:55,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316549534] [2023-02-15 10:22:55,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:55,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:55,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:55,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:55,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:55,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-15 10:22:55,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:55,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 10:22:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 10:22:55,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:55,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316549534] [2023-02-15 10:22:55,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316549534] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:22:55,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973001493] [2023-02-15 10:22:55,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:55,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:55,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:22:55,831 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:22:55,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 10:22:55,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:55,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 10:22:55,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:22:55,905 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 10:22:55,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 10:22:55,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973001493] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:22:55,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 10:22:55,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-02-15 10:22:55,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298608726] [2023-02-15 10:22:55,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:55,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 10:22:55,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:55,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 10:22:55,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-15 10:22:55,907 INFO L87 Difference]: Start difference. First operand 150 states and 217 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 10:22:55,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:55,977 INFO L93 Difference]: Finished difference Result 321 states and 469 transitions. [2023-02-15 10:22:55,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 10:22:55,977 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2023-02-15 10:22:55,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:55,978 INFO L225 Difference]: With dead ends: 321 [2023-02-15 10:22:55,978 INFO L226 Difference]: Without dead ends: 178 [2023-02-15 10:22:55,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-15 10:22:55,979 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 29 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:55,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 322 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:22:55,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-02-15 10:22:55,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 150. [2023-02-15 10:22:55,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 138 states have (on average 1.4202898550724639) internal successors, (196), 139 states have internal predecessors, (196), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-15 10:22:55,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 217 transitions. [2023-02-15 10:22:55,985 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 217 transitions. Word has length 55 [2023-02-15 10:22:55,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:55,986 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 217 transitions. [2023-02-15 10:22:55,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 10:22:55,986 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 217 transitions. [2023-02-15 10:22:55,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-15 10:22:55,986 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:55,987 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:55,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 10:22:56,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:56,192 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:56,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:56,192 INFO L85 PathProgramCache]: Analyzing trace with hash 340970481, now seen corresponding path program 1 times [2023-02-15 10:22:56,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:56,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779746878] [2023-02-15 10:22:56,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:56,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:56,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:56,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:56,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:56,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 10:22:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:56,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-15 10:22:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 10:22:56,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:56,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779746878] [2023-02-15 10:22:56,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779746878] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:22:56,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890474328] [2023-02-15 10:22:56,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:56,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:56,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:22:56,344 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:22:56,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 10:22:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:56,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 10:22:56,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:22:56,459 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 10:22:56,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:22:56,518 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 10:22:56,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890474328] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:22:56,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:22:56,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-02-15 10:22:56,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375237481] [2023-02-15 10:22:56,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:22:56,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 10:22:56,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:56,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 10:22:56,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2023-02-15 10:22:56,520 INFO L87 Difference]: Start difference. First operand 150 states and 217 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 10:22:56,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:56,870 INFO L93 Difference]: Finished difference Result 343 states and 506 transitions. [2023-02-15 10:22:56,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 10:22:56,870 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2023-02-15 10:22:56,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:56,871 INFO L225 Difference]: With dead ends: 343 [2023-02-15 10:22:56,871 INFO L226 Difference]: Without dead ends: 200 [2023-02-15 10:22:56,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2023-02-15 10:22:56,872 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 148 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:56,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 500 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:22:56,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-02-15 10:22:56,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 149. [2023-02-15 10:22:56,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 137 states have (on average 1.416058394160584) internal successors, (194), 138 states have internal predecessors, (194), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-15 10:22:56,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 215 transitions. [2023-02-15 10:22:56,878 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 215 transitions. Word has length 58 [2023-02-15 10:22:56,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:56,878 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 215 transitions. [2023-02-15 10:22:56,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 10:22:56,878 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 215 transitions. [2023-02-15 10:22:56,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-15 10:22:56,879 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:56,879 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, 1, 1] [2023-02-15 10:22:56,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-15 10:22:57,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:57,084 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:57,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:57,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1788145183, now seen corresponding path program 1 times [2023-02-15 10:22:57,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:57,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506458303] [2023-02-15 10:22:57,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:57,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:57,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:57,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:57,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:57,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-15 10:22:57,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:57,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 10:22:57,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 10:22:57,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:57,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506458303] [2023-02-15 10:22:57,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506458303] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:22:57,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783251725] [2023-02-15 10:22:57,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:57,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:57,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:22:57,174 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:22:57,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 10:22:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:57,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 10:22:57,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:22:57,279 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 10:22:57,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:22:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 10:22:57,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783251725] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:22:57,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:22:57,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-02-15 10:22:57,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992238511] [2023-02-15 10:22:57,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:22:57,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 10:22:57,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:57,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 10:22:57,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2023-02-15 10:22:57,402 INFO L87 Difference]: Start difference. First operand 149 states and 215 transitions. Second operand has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 10:22:57,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:57,610 INFO L93 Difference]: Finished difference Result 448 states and 678 transitions. [2023-02-15 10:22:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 10:22:57,610 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2023-02-15 10:22:57,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:57,612 INFO L225 Difference]: With dead ends: 448 [2023-02-15 10:22:57,612 INFO L226 Difference]: Without dead ends: 306 [2023-02-15 10:22:57,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=294, Invalid=462, Unknown=0, NotChecked=0, Total=756 [2023-02-15 10:22:57,613 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 545 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:57,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 596 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:22:57,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-02-15 10:22:57,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 168. [2023-02-15 10:22:57,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 156 states have (on average 1.4487179487179487) internal successors, (226), 157 states have internal predecessors, (226), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-15 10:22:57,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 247 transitions. [2023-02-15 10:22:57,626 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 247 transitions. Word has length 62 [2023-02-15 10:22:57,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:57,627 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 247 transitions. [2023-02-15 10:22:57,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 10:22:57,627 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 247 transitions. [2023-02-15 10:22:57,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-15 10:22:57,628 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:57,628 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 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, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:57,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 10:22:57,833 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,SelfDestructingSolverStorable10 [2023-02-15 10:22:57,833 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:57,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:57,834 INFO L85 PathProgramCache]: Analyzing trace with hash -71739151, now seen corresponding path program 2 times [2023-02-15 10:22:57,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:57,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696452973] [2023-02-15 10:22:57,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:57,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:57,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:57,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:58,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-02-15 10:22:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:58,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-15 10:22:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:58,059 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 10:22:58,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:58,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696452973] [2023-02-15 10:22:58,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696452973] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:22:58,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070964378] [2023-02-15 10:22:58,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 10:22:58,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:58,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:22:58,060 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) [2023-02-15 10:22:58,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 10:22:58,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 10:22:58,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:22:58,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 10:22:58,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:22:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 10:22:58,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:22:58,417 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 10:22:58,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070964378] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:22:58,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:22:58,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-02-15 10:22:58,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213692875] [2023-02-15 10:22:58,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:22:58,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 10:22:58,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:58,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 10:22:58,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=409, Unknown=0, NotChecked=0, Total=600 [2023-02-15 10:22:58,419 INFO L87 Difference]: Start difference. First operand 168 states and 247 transitions. Second operand has 25 states, 25 states have (on average 4.44) internal successors, (111), 25 states have internal predecessors, (111), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 10:23:08,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:23:08,668 INFO L93 Difference]: Finished difference Result 421 states and 630 transitions. [2023-02-15 10:23:08,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 10:23:08,668 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.44) internal successors, (111), 25 states have internal predecessors, (111), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2023-02-15 10:23:08,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:23:08,670 INFO L225 Difference]: With dead ends: 421 [2023-02-15 10:23:08,670 INFO L226 Difference]: Without dead ends: 260 [2023-02-15 10:23:08,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=503, Invalid=902, Unknown=1, NotChecked=0, Total=1406 [2023-02-15 10:23:08,671 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 283 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 10:23:08,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 1042 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 10:23:08,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-02-15 10:23:08,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 173. [2023-02-15 10:23:08,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 161 states have (on average 1.453416149068323) internal successors, (234), 162 states have internal predecessors, (234), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-15 10:23:08,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 255 transitions. [2023-02-15 10:23:08,679 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 255 transitions. Word has length 70 [2023-02-15 10:23:08,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:23:08,679 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 255 transitions. [2023-02-15 10:23:08,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.44) internal successors, (111), 25 states have internal predecessors, (111), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 10:23:08,680 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 255 transitions. [2023-02-15 10:23:08,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-15 10:23:08,680 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:23:08,680 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 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, 1, 1] [2023-02-15 10:23:08,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 10:23:08,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:23:08,906 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:23:08,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:23:08,906 INFO L85 PathProgramCache]: Analyzing trace with hash 270194017, now seen corresponding path program 2 times [2023-02-15 10:23:08,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:23:08,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052661486] [2023-02-15 10:23:08,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:08,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:23:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:08,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:23:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:08,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:23:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:09,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-02-15 10:23:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:09,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-02-15 10:23:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:09,120 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 10:23:09,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:23:09,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052661486] [2023-02-15 10:23:09,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052661486] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:23:09,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975383304] [2023-02-15 10:23:09,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 10:23:09,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:23:09,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:23:09,125 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) [2023-02-15 10:23:09,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 10:23:09,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 10:23:09,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:23:09,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 10:23:09,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:23:09,301 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 10:23:09,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:23:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 10:23:09,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975383304] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:23:09,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:23:09,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2023-02-15 10:23:09,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893020775] [2023-02-15 10:23:09,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:23:09,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-15 10:23:09,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:23:09,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-15 10:23:09,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=916, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 10:23:09,626 INFO L87 Difference]: Start difference. First operand 173 states and 255 transitions. Second operand has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 10:23:10,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:23:10,017 INFO L93 Difference]: Finished difference Result 658 states and 1022 transitions. [2023-02-15 10:23:10,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-15 10:23:10,018 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2023-02-15 10:23:10,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:23:10,020 INFO L225 Difference]: With dead ends: 658 [2023-02-15 10:23:10,020 INFO L226 Difference]: Without dead ends: 492 [2023-02-15 10:23:10,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1020, Invalid=1632, Unknown=0, NotChecked=0, Total=2652 [2023-02-15 10:23:10,022 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 831 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 10:23:10,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 845 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 10:23:10,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2023-02-15 10:23:10,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 204. [2023-02-15 10:23:10,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 192 states have (on average 1.4895833333333333) internal successors, (286), 193 states have internal predecessors, (286), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-15 10:23:10,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 307 transitions. [2023-02-15 10:23:10,036 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 307 transitions. Word has length 80 [2023-02-15 10:23:10,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:23:10,036 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 307 transitions. [2023-02-15 10:23:10,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 10:23:10,036 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 307 transitions. [2023-02-15 10:23:10,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-02-15 10:23:10,037 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:23:10,037 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 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, 1, 1, 1, 1, 1, 1] [2023-02-15 10:23:10,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-15 10:23:10,245 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,SelfDestructingSolverStorable12 [2023-02-15 10:23:10,245 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:23:10,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:23:10,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1417933553, now seen corresponding path program 3 times [2023-02-15 10:23:10,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:23:10,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193866214] [2023-02-15 10:23:10,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:10,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:23:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:10,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:23:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:10,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:23:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:10,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-02-15 10:23:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:10,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2023-02-15 10:23:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:10,684 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 4 proven. 282 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 10:23:10,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:23:10,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193866214] [2023-02-15 10:23:10,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193866214] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:23:10,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718051524] [2023-02-15 10:23:10,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 10:23:10,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:23:10,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:23:10,686 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) [2023-02-15 10:23:10,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 10:23:11,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2023-02-15 10:23:11,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:23:11,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 61 conjunts are in the unsatisfiable core [2023-02-15 10:23:11,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:23:12,546 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 10 proven. 282 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 10:23:12,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:23:14,115 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 10 proven. 282 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 10:23:14,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718051524] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:23:14,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:23:14,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28, 29] total 71 [2023-02-15 10:23:14,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299021315] [2023-02-15 10:23:14,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:23:14,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-02-15 10:23:14,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:23:14,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-02-15 10:23:14,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=4496, Unknown=0, NotChecked=0, Total=4970 [2023-02-15 10:23:14,119 INFO L87 Difference]: Start difference. First operand 204 states and 307 transitions. Second operand has 71 states, 71 states have (on average 2.859154929577465) internal successors, (203), 67 states have internal predecessors, (203), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-15 10:23:24,087 WARN L233 SmtUtils]: Spent 5.09s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:23:43,320 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 115 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:23:53,362 WARN L233 SmtUtils]: Spent 5.26s on a formula simplification that was a NOOP. DAG size: 105 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:24:49,938 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 103 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:25:02,727 WARN L233 SmtUtils]: Spent 7.35s on a formula simplification that was a NOOP. DAG size: 111 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:26:17,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:26:17,015 INFO L93 Difference]: Finished difference Result 1331 states and 2487 transitions. [2023-02-15 10:26:17,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 294 states. [2023-02-15 10:26:17,016 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.859154929577465) internal successors, (203), 67 states have internal predecessors, (203), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) Word has length 94 [2023-02-15 10:26:17,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:26:17,021 INFO L225 Difference]: With dead ends: 1331 [2023-02-15 10:26:17,021 INFO L226 Difference]: Without dead ends: 1127 [2023-02-15 10:26:17,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 356 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49663 ImplicationChecksByTransitivity, 172.1s TimeCoverageRelationStatistics Valid=20293, Invalid=107513, Unknown=0, NotChecked=0, Total=127806 [2023-02-15 10:26:17,038 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 6863 mSDsluCounter, 7964 mSDsCounter, 0 mSdLazyCounter, 12168 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6962 SdHoareTripleChecker+Valid, 8200 SdHoareTripleChecker+Invalid, 12729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 12168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2023-02-15 10:26:17,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6962 Valid, 8200 Invalid, 12729 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [561 Valid, 12168 Invalid, 0 Unknown, 0 Unchecked, 11.9s Time] [2023-02-15 10:26:17,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2023-02-15 10:26:17,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 239. [2023-02-15 10:26:17,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 224 states have (on average 1.5044642857142858) internal successors, (337), 226 states have internal predecessors, (337), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 9 states have call predecessors, (28), 7 states have call successors, (28) [2023-02-15 10:26:17,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 373 transitions. [2023-02-15 10:26:17,134 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 373 transitions. Word has length 94 [2023-02-15 10:26:17,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:26:17,134 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 373 transitions. [2023-02-15 10:26:17,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.859154929577465) internal successors, (203), 67 states have internal predecessors, (203), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-15 10:26:17,134 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 373 transitions. [2023-02-15 10:26:17,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-02-15 10:26:17,135 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:26:17,135 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 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, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:26:17,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-15 10:26:17,340 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,SelfDestructingSolverStorable13 [2023-02-15 10:26:17,341 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:26:17,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:26:17,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1636741129, now seen corresponding path program 1 times [2023-02-15 10:26:17,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:26:17,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084551240] [2023-02-15 10:26:17,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:26:17,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:26:17,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:26:17,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:26:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:26:17,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:26:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:26:17,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-02-15 10:26:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:26:17,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-02-15 10:26:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:26:17,711 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 4 proven. 324 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 10:26:17,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:26:17,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084551240] [2023-02-15 10:26:17,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084551240] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:26:17,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504881015] [2023-02-15 10:26:17,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:26:17,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:26:17,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:26:17,713 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) [2023-02-15 10:26:17,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 10:26:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:26:17,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 10:26:17,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:26:17,801 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2023-02-15 10:26:17,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 10:26:17,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504881015] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:26:17,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 10:26:17,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [19] total 21 [2023-02-15 10:26:17,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779262054] [2023-02-15 10:26:17,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:26:17,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 10:26:17,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:26:17,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 10:26:17,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-02-15 10:26:17,803 INFO L87 Difference]: Start difference. First operand 239 states and 373 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 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) [2023-02-15 10:26:17,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:26:17,863 INFO L93 Difference]: Finished difference Result 491 states and 790 transitions. [2023-02-15 10:26:17,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 10:26:17,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 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 98 [2023-02-15 10:26:17,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:26:17,865 INFO L225 Difference]: With dead ends: 491 [2023-02-15 10:26:17,865 INFO L226 Difference]: Without dead ends: 259 [2023-02-15 10:26:17,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-02-15 10:26:17,867 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 4 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:26:17,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 277 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:26:17,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-02-15 10:26:17,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 245. [2023-02-15 10:26:17,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 230 states have (on average 1.491304347826087) internal successors, (343), 232 states have internal predecessors, (343), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 9 states have call predecessors, (28), 7 states have call successors, (28) [2023-02-15 10:26:17,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 379 transitions. [2023-02-15 10:26:17,886 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 379 transitions. Word has length 98 [2023-02-15 10:26:17,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:26:17,886 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 379 transitions. [2023-02-15 10:26:17,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 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) [2023-02-15 10:26:17,887 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 379 transitions. [2023-02-15 10:26:17,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-02-15 10:26:17,888 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:26:17,888 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:26:17,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-15 10:26:18,092 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,SelfDestructingSolverStorable14 [2023-02-15 10:26:18,092 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:26:18,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:26:18,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1245904171, now seen corresponding path program 1 times [2023-02-15 10:26:18,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:26:18,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658023604] [2023-02-15 10:26:18,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:26:18,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:26:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:26:18,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:26:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:26:18,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:26:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:26:18,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-02-15 10:26:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:26:18,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-02-15 10:26:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:26:18,517 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 4 proven. 324 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 10:26:18,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:26:18,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658023604] [2023-02-15 10:26:18,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658023604] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:26:18,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503290591] [2023-02-15 10:26:18,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:26:18,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:26:18,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:26:18,519 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) [2023-02-15 10:26:18,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 10:26:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:26:18,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 10:26:18,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:26:18,991 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 25 proven. 315 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 10:26:18,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:26:19,524 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 4 proven. 324 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 10:26:19,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503290591] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:26:19,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:26:19,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 52 [2023-02-15 10:26:19,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45358513] [2023-02-15 10:26:19,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:26:19,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-15 10:26:19,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:26:19,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-15 10:26:19,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2023-02-15 10:26:19,527 INFO L87 Difference]: Start difference. First operand 245 states and 379 transitions. Second operand has 52 states, 52 states have (on average 3.769230769230769) internal successors, (196), 52 states have internal predecessors, (196), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 10:26:50,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:26:50,976 INFO L93 Difference]: Finished difference Result 657 states and 1044 transitions. [2023-02-15 10:26:50,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-15 10:26:50,977 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.769230769230769) internal successors, (196), 52 states have internal predecessors, (196), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 99 [2023-02-15 10:26:50,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:26:50,979 INFO L225 Difference]: With dead ends: 657 [2023-02-15 10:26:50,979 INFO L226 Difference]: Without dead ends: 419 [2023-02-15 10:26:50,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=1690, Invalid=4006, Unknown=4, NotChecked=0, Total=5700 [2023-02-15 10:26:50,981 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 745 mSDsluCounter, 2404 mSDsCounter, 0 mSdLazyCounter, 3489 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 2565 SdHoareTripleChecker+Invalid, 3543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 3489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-15 10:26:50,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [745 Valid, 2565 Invalid, 3543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 3489 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-15 10:26:50,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2023-02-15 10:26:50,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 240. [2023-02-15 10:26:51,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 225 states have (on average 1.4844444444444445) internal successors, (334), 227 states have internal predecessors, (334), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 9 states have call predecessors, (28), 7 states have call successors, (28) [2023-02-15 10:26:51,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 370 transitions. [2023-02-15 10:26:51,001 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 370 transitions. Word has length 99 [2023-02-15 10:26:51,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:26:51,001 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 370 transitions. [2023-02-15 10:26:51,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.769230769230769) internal successors, (196), 52 states have internal predecessors, (196), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 10:26:51,001 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 370 transitions. [2023-02-15 10:26:51,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-02-15 10:26:51,002 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:26:51,002 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 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, 1, 1] [2023-02-15 10:26:51,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-15 10:26:51,207 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,SelfDestructingSolverStorable15 [2023-02-15 10:26:51,207 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:26:51,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:26:51,208 INFO L85 PathProgramCache]: Analyzing trace with hash 870628449, now seen corresponding path program 3 times [2023-02-15 10:26:51,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:26:51,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126045525] [2023-02-15 10:26:51,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:26:51,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:26:51,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:26:51,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:26:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:26:51,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:26:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:26:51,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-02-15 10:26:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:26:51,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-02-15 10:26:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:26:51,797 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 10:26:51,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:26:51,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126045525] [2023-02-15 10:26:51,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126045525] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:26:51,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706247565] [2023-02-15 10:26:51,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 10:26:51,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:26:51,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:26:51,799 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) [2023-02-15 10:26:51,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 10:26:52,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2023-02-15 10:26:52,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:26:52,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-15 10:26:52,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:26:52,460 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 10:26:52,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:26:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 10:26:53,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706247565] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:26:53,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:26:53,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 74 [2023-02-15 10:26:53,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428058378] [2023-02-15 10:26:53,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:26:53,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-02-15 10:26:53,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:26:53,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-02-15 10:26:53,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1846, Invalid=3556, Unknown=0, NotChecked=0, Total=5402 [2023-02-15 10:26:53,393 INFO L87 Difference]: Start difference. First operand 240 states and 370 transitions. Second operand has 74 states, 74 states have (on average 3.445945945945946) internal successors, (255), 74 states have internal predecessors, (255), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 10:26:54,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:26:54,819 INFO L93 Difference]: Finished difference Result 1225 states and 2089 transitions. [2023-02-15 10:26:54,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-02-15 10:26:54,821 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.445945945945946) internal successors, (255), 74 states have internal predecessors, (255), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 116 [2023-02-15 10:26:54,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:26:54,826 INFO L225 Difference]: With dead ends: 1225 [2023-02-15 10:26:54,826 INFO L226 Difference]: Without dead ends: 992 [2023-02-15 10:26:54,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2881 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3768, Invalid=6132, Unknown=0, NotChecked=0, Total=9900 [2023-02-15 10:26:54,828 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 3105 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3105 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 10:26:54,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3105 Valid, 1224 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 10:26:54,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2023-02-15 10:26:54,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 294. [2023-02-15 10:26:54,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 279 states have (on average 1.5197132616487454) internal successors, (424), 281 states have internal predecessors, (424), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 9 states have call predecessors, (28), 7 states have call successors, (28) [2023-02-15 10:26:54,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 460 transitions. [2023-02-15 10:26:54,875 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 460 transitions. Word has length 116 [2023-02-15 10:26:54,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:26:54,875 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 460 transitions. [2023-02-15 10:26:54,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.445945945945946) internal successors, (255), 74 states have internal predecessors, (255), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 10:26:54,876 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 460 transitions. [2023-02-15 10:26:54,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-02-15 10:26:54,877 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:26:54,877 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:26:54,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-15 10:26:55,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:26:55,083 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:26:55,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:26:55,083 INFO L85 PathProgramCache]: Analyzing trace with hash -169172583, now seen corresponding path program 2 times [2023-02-15 10:26:55,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:26:55,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769072876] [2023-02-15 10:26:55,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:26:55,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:26:55,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:26:55,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:26:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:26:55,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:26:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:26:56,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-02-15 10:26:56,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:26:56,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2023-02-15 10:26:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:26:56,907 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 10 proven. 837 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 10:26:56,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:26:56,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769072876] [2023-02-15 10:26:56,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769072876] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:26:56,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032084686] [2023-02-15 10:26:56,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 10:26:56,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:26:56,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:26:56,909 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) [2023-02-15 10:26:56,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 10:26:56,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 10:26:56,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:26:56,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 130 conjunts are in the unsatisfiable core [2023-02-15 10:26:56,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:26:58,626 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 10 proven. 837 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 10:26:58,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:27:02,587 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 10 proven. 837 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 10:27:02,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032084686] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:27:02,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:27:02,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 38] total 103 [2023-02-15 10:27:02,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060287665] [2023-02-15 10:27:02,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:27:02,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2023-02-15 10:27:02,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:27:02,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2023-02-15 10:27:02,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1198, Invalid=9308, Unknown=0, NotChecked=0, Total=10506 [2023-02-15 10:27:02,591 INFO L87 Difference]: Start difference. First operand 294 states and 460 transitions. Second operand has 103 states, 103 states have (on average 2.883495145631068) internal successors, (297), 99 states have internal predecessors, (297), 4 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8)