./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem16_label30.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/eca-rers2012/Problem16_label30.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 12d23798e1ec2473ce2c19acb587b0594ab921b365483c260e8791dd4e57612e --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:55:11,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:55:11,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:55:11,351 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:55:11,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:55:11,355 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:55:11,356 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:55:11,361 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:55:11,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:55:11,365 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:55:11,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:55:11,367 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:55:11,368 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:55:11,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:55:11,375 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:55:11,376 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:55:11,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:55:11,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:55:11,382 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:55:11,384 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:55:11,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:55:11,389 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:55:11,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:55:11,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:55:11,392 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:55:11,393 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:55:11,394 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:55:11,394 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:55:11,396 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:55:11,396 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:55:11,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:55:11,397 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:55:11,398 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:55:11,399 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:55:11,399 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:55:11,399 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:55:11,400 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:55:11,400 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:55:11,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:55:11,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:55:11,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:55:11,402 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:55:11,426 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:55:11,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:55:11,427 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:55:11,427 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:55:11,428 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:55:11,428 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:55:11,429 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:55:11,429 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:55:11,429 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:55:11,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:55:11,430 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:55:11,430 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:55:11,430 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:55:11,431 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:55:11,431 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:55:11,431 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:55:11,431 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:55:11,432 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:55:11,432 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:55:11,432 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:55:11,432 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:55:11,432 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:55:11,433 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:55:11,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:55:11,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:55:11,433 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:55:11,433 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:55:11,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:55:11,434 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:55:11,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:55:11,434 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:55:11,434 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:55:11,435 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:55:11,435 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:55:11,435 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 12d23798e1ec2473ce2c19acb587b0594ab921b365483c260e8791dd4e57612e [2021-12-15 09:55:11,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:55:11,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:55:11,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:55:11,659 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:55:11,660 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:55:11,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label30.c [2021-12-15 09:55:11,733 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e92a30c7/8bd52a7e9a954cda965605c1f80fce58/FLAG26a7053ed [2021-12-15 09:55:12,268 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:55:12,269 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label30.c [2021-12-15 09:55:12,304 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e92a30c7/8bd52a7e9a954cda965605c1f80fce58/FLAG26a7053ed [2021-12-15 09:55:12,734 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e92a30c7/8bd52a7e9a954cda965605c1f80fce58 [2021-12-15 09:55:12,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:55:12,738 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:55:12,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:55:12,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:55:12,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:55:12,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:55:12" (1/1) ... [2021-12-15 09:55:12,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49055271 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:12, skipping insertion in model container [2021-12-15 09:55:12,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:55:12" (1/1) ... [2021-12-15 09:55:12,753 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:55:12,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:55:12,949 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label30.c[1812,1825] [2021-12-15 09:55:13,289 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:55:13,301 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:55:13,322 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label30.c[1812,1825] [2021-12-15 09:55:13,545 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:55:13,559 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:55:13,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:13 WrapperNode [2021-12-15 09:55:13,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:55:13,560 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:55:13,561 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:55:13,561 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:55:13,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:13" (1/1) ... [2021-12-15 09:55:13,608 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:13" (1/1) ... [2021-12-15 09:55:13,718 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1768 [2021-12-15 09:55:13,719 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:55:13,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:55:13,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:55:13,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:55:13,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:13" (1/1) ... [2021-12-15 09:55:13,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:13" (1/1) ... [2021-12-15 09:55:13,744 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:13" (1/1) ... [2021-12-15 09:55:13,744 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:13" (1/1) ... [2021-12-15 09:55:13,801 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:13" (1/1) ... [2021-12-15 09:55:13,821 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:13" (1/1) ... [2021-12-15 09:55:13,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:13" (1/1) ... [2021-12-15 09:55:13,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:55:13,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:55:13,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:55:13,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:55:13,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:13" (1/1) ... [2021-12-15 09:55:13,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:55:13,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:55:13,884 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) [2021-12-15 09:55:13,900 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 [2021-12-15 09:55:13,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:55:13,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:55:13,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:55:13,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:55:13,985 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:55:13,987 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:55:15,605 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:55:15,619 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:55:15,620 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:55:15,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:55:15 BoogieIcfgContainer [2021-12-15 09:55:15,623 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:55:15,625 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:55:15,625 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:55:15,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:55:15,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:55:12" (1/3) ... [2021-12-15 09:55:15,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b4fc271 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:55:15, skipping insertion in model container [2021-12-15 09:55:15,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:55:13" (2/3) ... [2021-12-15 09:55:15,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b4fc271 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:55:15, skipping insertion in model container [2021-12-15 09:55:15,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:55:15" (3/3) ... [2021-12-15 09:55:15,632 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label30.c [2021-12-15 09:55:15,637 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:55:15,638 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:55:15,695 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:55:15,703 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 09:55:15,704 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:55:15,730 INFO L276 IsEmpty]: Start isEmpty. Operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:15,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-15 09:55:15,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:15,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:15,742 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:15,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:15,747 INFO L85 PathProgramCache]: Analyzing trace with hash -884752143, now seen corresponding path program 1 times [2021-12-15 09:55:15,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:15,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862243056] [2021-12-15 09:55:15,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:15,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:15,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:55:15,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:15,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862243056] [2021-12-15 09:55:15,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862243056] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:15,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:15,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:55:15,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139376506] [2021-12-15 09:55:15,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:15,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:15,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:15,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:15,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:15,960 INFO L87 Difference]: Start difference. First operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:17,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:17,496 INFO L93 Difference]: Finished difference Result 1122 states and 2103 transitions. [2021-12-15 09:55:17,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:17,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-15 09:55:17,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:17,511 INFO L225 Difference]: With dead ends: 1122 [2021-12-15 09:55:17,511 INFO L226 Difference]: Without dead ends: 662 [2021-12-15 09:55:17,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:17,517 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 372 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:17,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 254 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 09:55:17,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-12-15 09:55:17,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2021-12-15 09:55:17,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.518910741301059) internal successors, (1004), 661 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:17,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1004 transitions. [2021-12-15 09:55:17,582 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1004 transitions. Word has length 15 [2021-12-15 09:55:17,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:17,583 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1004 transitions. [2021-12-15 09:55:17,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:17,583 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1004 transitions. [2021-12-15 09:55:17,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-15 09:55:17,586 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:17,586 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1] [2021-12-15 09:55:17,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:55:17,587 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:17,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:17,587 INFO L85 PathProgramCache]: Analyzing trace with hash 78333238, now seen corresponding path program 1 times [2021-12-15 09:55:17,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:17,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393968794] [2021-12-15 09:55:17,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:17,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:17,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:55:17,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:17,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393968794] [2021-12-15 09:55:17,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393968794] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:17,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:17,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:55:17,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131340766] [2021-12-15 09:55:17,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:17,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:55:17,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:17,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:55:17,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:55:17,740 INFO L87 Difference]: Start difference. First operand 662 states and 1004 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:19,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:19,688 INFO L93 Difference]: Finished difference Result 2309 states and 3414 transitions. [2021-12-15 09:55:19,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:55:19,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-15 09:55:19,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:19,695 INFO L225 Difference]: With dead ends: 2309 [2021-12-15 09:55:19,696 INFO L226 Difference]: Without dead ends: 1649 [2021-12-15 09:55:19,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:55:19,699 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 1002 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1002 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:19,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1002 Valid, 42 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 1496 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 09:55:19,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2021-12-15 09:55:19,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1649. [2021-12-15 09:55:19,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 1.4016990291262137) internal successors, (2310), 1648 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:19,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2310 transitions. [2021-12-15 09:55:19,749 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2310 transitions. Word has length 83 [2021-12-15 09:55:19,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:19,750 INFO L470 AbstractCegarLoop]: Abstraction has 1649 states and 2310 transitions. [2021-12-15 09:55:19,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:19,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2310 transitions. [2021-12-15 09:55:19,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-15 09:55:19,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:19,754 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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] [2021-12-15 09:55:19,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:55:19,755 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:19,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:19,756 INFO L85 PathProgramCache]: Analyzing trace with hash -2049299503, now seen corresponding path program 1 times [2021-12-15 09:55:19,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:19,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549431423] [2021-12-15 09:55:19,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:19,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:19,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:19,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:55:19,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:19,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549431423] [2021-12-15 09:55:19,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549431423] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:19,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:19,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:55:19,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604180450] [2021-12-15 09:55:19,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:19,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:55:19,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:19,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:55:19,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:55:19,999 INFO L87 Difference]: Start difference. First operand 1649 states and 2310 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:21,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:21,396 INFO L93 Difference]: Finished difference Result 2981 states and 4291 transitions. [2021-12-15 09:55:21,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 09:55:21,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-12-15 09:55:21,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:21,403 INFO L225 Difference]: With dead ends: 2981 [2021-12-15 09:55:21,403 INFO L226 Difference]: Without dead ends: 1663 [2021-12-15 09:55:21,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:55:21,406 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 409 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:21,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 371 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 09:55:21,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2021-12-15 09:55:21,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1649. [2021-12-15 09:55:21,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 1.3980582524271845) internal successors, (2304), 1648 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:21,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2304 transitions. [2021-12-15 09:55:21,448 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2304 transitions. Word has length 146 [2021-12-15 09:55:21,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:21,451 INFO L470 AbstractCegarLoop]: Abstraction has 1649 states and 2304 transitions. [2021-12-15 09:55:21,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:21,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2304 transitions. [2021-12-15 09:55:21,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-12-15 09:55:21,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:21,458 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:21,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:55:21,458 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:21,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:21,459 INFO L85 PathProgramCache]: Analyzing trace with hash 105090845, now seen corresponding path program 1 times [2021-12-15 09:55:21,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:21,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653583750] [2021-12-15 09:55:21,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:21,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:21,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-15 09:55:21,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:21,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653583750] [2021-12-15 09:55:21,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653583750] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:21,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:21,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:55:21,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122654278] [2021-12-15 09:55:21,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:21,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:21,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:21,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:21,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:21,541 INFO L87 Difference]: Start difference. First operand 1649 states and 2304 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:22,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:22,625 INFO L93 Difference]: Finished difference Result 4283 states and 6237 transitions. [2021-12-15 09:55:22,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:22,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2021-12-15 09:55:22,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:22,636 INFO L225 Difference]: With dead ends: 4283 [2021-12-15 09:55:22,636 INFO L226 Difference]: Without dead ends: 2965 [2021-12-15 09:55:22,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:22,650 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 359 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:22,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 155 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 09:55:22,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2021-12-15 09:55:22,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2307. [2021-12-15 09:55:22,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 2306 states have (on average 1.349956634865568) internal successors, (3113), 2306 states have internal predecessors, (3113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:22,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 3113 transitions. [2021-12-15 09:55:22,690 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 3113 transitions. Word has length 181 [2021-12-15 09:55:22,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:22,691 INFO L470 AbstractCegarLoop]: Abstraction has 2307 states and 3113 transitions. [2021-12-15 09:55:22,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:22,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 3113 transitions. [2021-12-15 09:55:22,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-12-15 09:55:22,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:22,694 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:22,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:55:22,694 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:22,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:22,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1746481106, now seen corresponding path program 1 times [2021-12-15 09:55:22,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:22,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885200083] [2021-12-15 09:55:22,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:22,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:22,784 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:55:22,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:22,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885200083] [2021-12-15 09:55:22,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885200083] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:22,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:22,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:55:22,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981530120] [2021-12-15 09:55:22,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:22,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:22,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:22,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:22,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:22,787 INFO L87 Difference]: Start difference. First operand 2307 states and 3113 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:23,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:23,789 INFO L93 Difference]: Finished difference Result 5599 states and 7663 transitions. [2021-12-15 09:55:23,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:23,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 198 [2021-12-15 09:55:23,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:23,799 INFO L225 Difference]: With dead ends: 5599 [2021-12-15 09:55:23,799 INFO L226 Difference]: Without dead ends: 2965 [2021-12-15 09:55:23,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:23,803 INFO L933 BasicCegarLoop]: 534 mSDtfsCounter, 286 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:23,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 540 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 09:55:23,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2021-12-15 09:55:23,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2965. [2021-12-15 09:55:23,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2964 states have (on average 1.1032388663967612) internal successors, (3270), 2964 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:23,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 3270 transitions. [2021-12-15 09:55:23,854 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 3270 transitions. Word has length 198 [2021-12-15 09:55:23,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:23,855 INFO L470 AbstractCegarLoop]: Abstraction has 2965 states and 3270 transitions. [2021-12-15 09:55:23,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:23,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 3270 transitions. [2021-12-15 09:55:23,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-12-15 09:55:23,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:23,858 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:23,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:55:23,859 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:23,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:23,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1740333483, now seen corresponding path program 1 times [2021-12-15 09:55:23,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:23,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676818615] [2021-12-15 09:55:23,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:23,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:23,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:55:23,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:23,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676818615] [2021-12-15 09:55:23,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676818615] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:23,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:23,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:55:23,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763121791] [2021-12-15 09:55:23,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:23,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:23,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:23,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:23,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:23,959 INFO L87 Difference]: Start difference. First operand 2965 states and 3270 transitions. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:24,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:24,685 INFO L93 Difference]: Finished difference Result 6586 states and 7325 transitions. [2021-12-15 09:55:24,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:24,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 250 [2021-12-15 09:55:24,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:24,699 INFO L225 Difference]: With dead ends: 6586 [2021-12-15 09:55:24,699 INFO L226 Difference]: Without dead ends: 3952 [2021-12-15 09:55:24,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:24,704 INFO L933 BasicCegarLoop]: 411 mSDtfsCounter, 321 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:24,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 417 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:55:24,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2021-12-15 09:55:24,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 3952. [2021-12-15 09:55:24,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3952 states, 3951 states have (on average 1.0665654264743103) internal successors, (4214), 3951 states have internal predecessors, (4214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:24,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 4214 transitions. [2021-12-15 09:55:24,777 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 4214 transitions. Word has length 250 [2021-12-15 09:55:24,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:24,778 INFO L470 AbstractCegarLoop]: Abstraction has 3952 states and 4214 transitions. [2021-12-15 09:55:24,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:24,779 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 4214 transitions. [2021-12-15 09:55:24,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2021-12-15 09:55:24,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:24,783 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:24,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:55:24,783 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:24,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:24,784 INFO L85 PathProgramCache]: Analyzing trace with hash 73698292, now seen corresponding path program 1 times [2021-12-15 09:55:24,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:24,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957190106] [2021-12-15 09:55:24,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:24,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:24,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-15 09:55:24,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:24,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957190106] [2021-12-15 09:55:24,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957190106] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:55:24,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691508581] [2021-12-15 09:55:24,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:24,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:55:24,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:55:24,964 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) [2021-12-15 09:55:24,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:55:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:25,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:55:25,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:55:25,861 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-15 09:55:25,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:55:25,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691508581] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:25,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:55:25,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 09:55:25,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205856695] [2021-12-15 09:55:25,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:25,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:25,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:25,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:25,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:55:25,865 INFO L87 Difference]: Start difference. First operand 3952 states and 4214 transitions. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 2 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:26,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:26,700 INFO L93 Difference]: Finished difference Result 4941 states and 5254 transitions. [2021-12-15 09:55:26,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:26,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 2 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 354 [2021-12-15 09:55:26,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:26,716 INFO L225 Difference]: With dead ends: 4941 [2021-12-15 09:55:26,717 INFO L226 Difference]: Without dead ends: 4939 [2021-12-15 09:55:26,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:55:26,720 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 108 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:26,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 75 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:55:26,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4939 states. [2021-12-15 09:55:26,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4939 to 4281. [2021-12-15 09:55:26,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4281 states, 4280 states have (on average 1.069392523364486) internal successors, (4577), 4280 states have internal predecessors, (4577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:26,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4281 states to 4281 states and 4577 transitions. [2021-12-15 09:55:26,791 INFO L78 Accepts]: Start accepts. Automaton has 4281 states and 4577 transitions. Word has length 354 [2021-12-15 09:55:26,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:26,792 INFO L470 AbstractCegarLoop]: Abstraction has 4281 states and 4577 transitions. [2021-12-15 09:55:26,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 2 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:26,793 INFO L276 IsEmpty]: Start isEmpty. Operand 4281 states and 4577 transitions. [2021-12-15 09:55:26,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2021-12-15 09:55:26,810 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:26,811 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:26,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 09:55:27,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:55:27,028 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:27,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:27,028 INFO L85 PathProgramCache]: Analyzing trace with hash 171467218, now seen corresponding path program 1 times [2021-12-15 09:55:27,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:27,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052452120] [2021-12-15 09:55:27,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:27,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:27,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 765 proven. 205 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-12-15 09:55:27,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:27,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052452120] [2021-12-15 09:55:27,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052452120] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:55:27,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652716416] [2021-12-15 09:55:27,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:27,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:55:27,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:55:27,372 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) [2021-12-15 09:55:27,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 09:55:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:27,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:55:27,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:55:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 765 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2021-12-15 09:55:28,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:55:28,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652716416] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:28,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:55:28,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-15 09:55:28,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386407211] [2021-12-15 09:55:28,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:28,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:28,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:28,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:28,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:55:28,856 INFO L87 Difference]: Start difference. First operand 4281 states and 4577 transitions. Second operand has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 2 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:29,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:29,644 INFO L93 Difference]: Finished difference Result 9218 states and 9859 transitions. [2021-12-15 09:55:29,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:29,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 2 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 785 [2021-12-15 09:55:29,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:29,659 INFO L225 Difference]: With dead ends: 9218 [2021-12-15 09:55:29,659 INFO L226 Difference]: Without dead ends: 5268 [2021-12-15 09:55:29,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 784 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:55:29,664 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 118 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:29,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 31 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:55:29,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2021-12-15 09:55:29,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 5268. [2021-12-15 09:55:29,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5268 states, 5267 states have (on average 1.0506929941142966) internal successors, (5534), 5267 states have internal predecessors, (5534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:29,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5268 states to 5268 states and 5534 transitions. [2021-12-15 09:55:29,735 INFO L78 Accepts]: Start accepts. Automaton has 5268 states and 5534 transitions. Word has length 785 [2021-12-15 09:55:29,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:29,736 INFO L470 AbstractCegarLoop]: Abstraction has 5268 states and 5534 transitions. [2021-12-15 09:55:29,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 2 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:29,737 INFO L276 IsEmpty]: Start isEmpty. Operand 5268 states and 5534 transitions. [2021-12-15 09:55:29,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 911 [2021-12-15 09:55:29,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:29,763 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:29,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 09:55:29,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-15 09:55:29,980 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:29,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:29,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1315946905, now seen corresponding path program 1 times [2021-12-15 09:55:29,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:29,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137379821] [2021-12-15 09:55:29,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:29,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:30,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 1316 proven. 0 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2021-12-15 09:55:30,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:30,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137379821] [2021-12-15 09:55:30,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137379821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:30,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:30,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:55:30,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179073843] [2021-12-15 09:55:30,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:30,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:30,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:30,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:30,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:30,242 INFO L87 Difference]: Start difference. First operand 5268 states and 5534 transitions. Second operand has 3 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:31,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:31,050 INFO L93 Difference]: Finished difference Result 11850 states and 12519 transitions. [2021-12-15 09:55:31,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:31,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 910 [2021-12-15 09:55:31,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:31,071 INFO L225 Difference]: With dead ends: 11850 [2021-12-15 09:55:31,071 INFO L226 Difference]: Without dead ends: 6913 [2021-12-15 09:55:31,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:31,078 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 223 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:31,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 36 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:55:31,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6913 states. [2021-12-15 09:55:31,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6913 to 6913. [2021-12-15 09:55:31,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6913 states, 6912 states have (on average 1.0533854166666667) internal successors, (7281), 6912 states have internal predecessors, (7281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:31,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6913 states to 6913 states and 7281 transitions. [2021-12-15 09:55:31,172 INFO L78 Accepts]: Start accepts. Automaton has 6913 states and 7281 transitions. Word has length 910 [2021-12-15 09:55:31,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:31,173 INFO L470 AbstractCegarLoop]: Abstraction has 6913 states and 7281 transitions. [2021-12-15 09:55:31,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:31,174 INFO L276 IsEmpty]: Start isEmpty. Operand 6913 states and 7281 transitions. [2021-12-15 09:55:31,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1016 [2021-12-15 09:55:31,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:31,188 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:31,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:55:31,189 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:31,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:31,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1870019088, now seen corresponding path program 1 times [2021-12-15 09:55:31,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:31,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272188933] [2021-12-15 09:55:31,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:31,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:31,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1729 backedges. 1265 proven. 0 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2021-12-15 09:55:31,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:31,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272188933] [2021-12-15 09:55:31,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272188933] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:31,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:31,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:55:31,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9841173] [2021-12-15 09:55:31,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:31,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:31,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:31,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:31,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:31,515 INFO L87 Difference]: Start difference. First operand 6913 states and 7281 transitions. Second operand has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:32,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:32,304 INFO L93 Difference]: Finished difference Result 15140 states and 16013 transitions. [2021-12-15 09:55:32,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:32,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1015 [2021-12-15 09:55:32,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:32,321 INFO L225 Difference]: With dead ends: 15140 [2021-12-15 09:55:32,321 INFO L226 Difference]: Without dead ends: 8558 [2021-12-15 09:55:32,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:32,335 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 220 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:32,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 431 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:55:32,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8558 states. [2021-12-15 09:55:32,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8558 to 8229. [2021-12-15 09:55:32,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8229 states, 8228 states have (on average 1.0480068060281964) internal successors, (8623), 8228 states have internal predecessors, (8623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:32,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8229 states to 8229 states and 8623 transitions. [2021-12-15 09:55:32,456 INFO L78 Accepts]: Start accepts. Automaton has 8229 states and 8623 transitions. Word has length 1015 [2021-12-15 09:55:32,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:32,457 INFO L470 AbstractCegarLoop]: Abstraction has 8229 states and 8623 transitions. [2021-12-15 09:55:32,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:32,457 INFO L276 IsEmpty]: Start isEmpty. Operand 8229 states and 8623 transitions. [2021-12-15 09:55:32,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1017 [2021-12-15 09:55:32,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:32,473 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:32,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:55:32,474 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:32,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:32,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1623754145, now seen corresponding path program 1 times [2021-12-15 09:55:32,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:32,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919606890] [2021-12-15 09:55:32,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:32,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:32,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 661 proven. 737 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2021-12-15 09:55:32,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:32,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919606890] [2021-12-15 09:55:32,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919606890] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:55:32,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905087615] [2021-12-15 09:55:32,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:32,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:55:32,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:55:32,916 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) [2021-12-15 09:55:32,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 09:55:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:33,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 1216 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:55:33,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:55:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 981 proven. 0 refuted. 0 times theorem prover too weak. 753 trivial. 0 not checked. [2021-12-15 09:55:34,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:55:34,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905087615] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:34,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:55:34,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-15 09:55:34,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200129465] [2021-12-15 09:55:34,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:34,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:34,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:34,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:34,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:55:34,669 INFO L87 Difference]: Start difference. First operand 8229 states and 8623 transitions. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:35,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:35,319 INFO L93 Difference]: Finished difference Result 16127 states and 16913 transitions. [2021-12-15 09:55:35,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:35,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1016 [2021-12-15 09:55:35,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:35,334 INFO L225 Difference]: With dead ends: 16127 [2021-12-15 09:55:35,334 INFO L226 Difference]: Without dead ends: 8229 [2021-12-15 09:55:35,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1020 GetRequests, 1016 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:55:35,342 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 94 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:35,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 377 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:55:35,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8229 states. [2021-12-15 09:55:35,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8229 to 8229. [2021-12-15 09:55:35,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8229 states, 8228 states have (on average 1.0419299951385512) internal successors, (8573), 8228 states have internal predecessors, (8573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:35,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8229 states to 8229 states and 8573 transitions. [2021-12-15 09:55:35,464 INFO L78 Accepts]: Start accepts. Automaton has 8229 states and 8573 transitions. Word has length 1016 [2021-12-15 09:55:35,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:35,465 INFO L470 AbstractCegarLoop]: Abstraction has 8229 states and 8573 transitions. [2021-12-15 09:55:35,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:35,465 INFO L276 IsEmpty]: Start isEmpty. Operand 8229 states and 8573 transitions. [2021-12-15 09:55:35,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1139 [2021-12-15 09:55:35,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:35,483 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:35,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-15 09:55:35,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:55:35,699 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:35,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:35,700 INFO L85 PathProgramCache]: Analyzing trace with hash -27530908, now seen corresponding path program 1 times [2021-12-15 09:55:35,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:35,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555253761] [2021-12-15 09:55:35,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:35,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:35,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2539 backedges. 1747 proven. 0 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2021-12-15 09:55:36,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:36,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555253761] [2021-12-15 09:55:36,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555253761] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:36,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:36,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:55:36,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105246219] [2021-12-15 09:55:36,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:36,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:36,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:36,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:36,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:36,110 INFO L87 Difference]: Start difference. First operand 8229 states and 8573 transitions. Second operand has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:37,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:37,017 INFO L93 Difference]: Finished difference Result 16127 states and 16813 transitions. [2021-12-15 09:55:37,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:37,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1138 [2021-12-15 09:55:37,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:37,030 INFO L225 Difference]: With dead ends: 16127 [2021-12-15 09:55:37,030 INFO L226 Difference]: Without dead ends: 8229 [2021-12-15 09:55:37,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:37,037 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 210 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:37,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 37 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 09:55:37,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8229 states. [2021-12-15 09:55:37,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8229 to 8229. [2021-12-15 09:55:37,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8229 states, 8228 states have (on average 1.037311618862421) internal successors, (8535), 8228 states have internal predecessors, (8535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:37,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8229 states to 8229 states and 8535 transitions. [2021-12-15 09:55:37,158 INFO L78 Accepts]: Start accepts. Automaton has 8229 states and 8535 transitions. Word has length 1138 [2021-12-15 09:55:37,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:37,158 INFO L470 AbstractCegarLoop]: Abstraction has 8229 states and 8535 transitions. [2021-12-15 09:55:37,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:37,159 INFO L276 IsEmpty]: Start isEmpty. Operand 8229 states and 8535 transitions. [2021-12-15 09:55:37,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1167 [2021-12-15 09:55:37,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:37,181 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:37,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:55:37,182 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:37,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:37,183 INFO L85 PathProgramCache]: Analyzing trace with hash -242019254, now seen corresponding path program 1 times [2021-12-15 09:55:37,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:37,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336866182] [2021-12-15 09:55:37,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:37,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2647 backedges. 1441 proven. 0 refuted. 0 times theorem prover too weak. 1206 trivial. 0 not checked. [2021-12-15 09:55:37,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:37,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336866182] [2021-12-15 09:55:37,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336866182] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:37,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:37,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:55:37,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775424355] [2021-12-15 09:55:37,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:37,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:37,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:37,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:37,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:37,536 INFO L87 Difference]: Start difference. First operand 8229 states and 8535 transitions. Second operand has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:38,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:38,269 INFO L93 Difference]: Finished difference Result 17114 states and 17739 transitions. [2021-12-15 09:55:38,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:38,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1166 [2021-12-15 09:55:38,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:38,283 INFO L225 Difference]: With dead ends: 17114 [2021-12-15 09:55:38,284 INFO L226 Difference]: Without dead ends: 9216 [2021-12-15 09:55:38,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:55:38,292 INFO L933 BasicCegarLoop]: 433 mSDtfsCounter, 224 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:38,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 439 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:55:38,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9216 states. [2021-12-15 09:55:38,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9216 to 9216. [2021-12-15 09:55:38,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9216 states, 9215 states have (on average 1.0340748779164406) internal successors, (9529), 9215 states have internal predecessors, (9529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:38,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9216 states to 9216 states and 9529 transitions. [2021-12-15 09:55:38,382 INFO L78 Accepts]: Start accepts. Automaton has 9216 states and 9529 transitions. Word has length 1166 [2021-12-15 09:55:38,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:38,383 INFO L470 AbstractCegarLoop]: Abstraction has 9216 states and 9529 transitions. [2021-12-15 09:55:38,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:38,384 INFO L276 IsEmpty]: Start isEmpty. Operand 9216 states and 9529 transitions. [2021-12-15 09:55:38,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1185 [2021-12-15 09:55:38,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:38,402 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:38,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 09:55:38,402 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:38,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:38,403 INFO L85 PathProgramCache]: Analyzing trace with hash 2020550871, now seen corresponding path program 1 times [2021-12-15 09:55:38,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:38,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732787275] [2021-12-15 09:55:38,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:38,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:38,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2677 backedges. 2171 proven. 132 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2021-12-15 09:55:38,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:38,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732787275] [2021-12-15 09:55:38,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732787275] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:55:38,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279975081] [2021-12-15 09:55:38,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:38,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:55:38,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:55:38,791 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) [2021-12-15 09:55:38,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 09:55:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:39,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 1413 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:55:39,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:55:41,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2677 backedges. 1382 proven. 0 refuted. 0 times theorem prover too weak. 1295 trivial. 0 not checked. [2021-12-15 09:55:41,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:55:41,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279975081] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:41,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:55:41,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-15 09:55:41,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570978415] [2021-12-15 09:55:41,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:41,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:41,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:41,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:41,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:55:41,823 INFO L87 Difference]: Start difference. First operand 9216 states and 9529 transitions. Second operand has 3 states, 3 states have (on average 156.0) internal successors, (468), 2 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:42,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:42,538 INFO L93 Difference]: Finished difference Result 18101 states and 18725 transitions. [2021-12-15 09:55:42,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:42,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 2 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1184 [2021-12-15 09:55:42,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:42,550 INFO L225 Difference]: With dead ends: 18101 [2021-12-15 09:55:42,550 INFO L226 Difference]: Without dead ends: 9216 [2021-12-15 09:55:42,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1188 GetRequests, 1184 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:55:42,558 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 86 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:42,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 90 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:55:42,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9216 states. [2021-12-15 09:55:42,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9216 to 9216. [2021-12-15 09:55:42,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9216 states, 9215 states have (on average 1.0339663591969614) internal successors, (9528), 9215 states have internal predecessors, (9528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:42,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9216 states to 9216 states and 9528 transitions. [2021-12-15 09:55:42,663 INFO L78 Accepts]: Start accepts. Automaton has 9216 states and 9528 transitions. Word has length 1184 [2021-12-15 09:55:42,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:42,664 INFO L470 AbstractCegarLoop]: Abstraction has 9216 states and 9528 transitions. [2021-12-15 09:55:42,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 2 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:42,665 INFO L276 IsEmpty]: Start isEmpty. Operand 9216 states and 9528 transitions. [2021-12-15 09:55:42,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1215 [2021-12-15 09:55:42,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:42,683 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:42,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 09:55:42,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:55:42,908 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:42,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:42,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1358827605, now seen corresponding path program 1 times [2021-12-15 09:55:42,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:42,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091793990] [2021-12-15 09:55:42,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:42,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3305 backedges. 1550 proven. 156 refuted. 0 times theorem prover too weak. 1599 trivial. 0 not checked. [2021-12-15 09:55:43,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:43,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091793990] [2021-12-15 09:55:43,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091793990] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:55:43,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277755481] [2021-12-15 09:55:43,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:43,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:55:43,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:55:43,337 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) [2021-12-15 09:55:43,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 09:55:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:43,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 1467 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:55:43,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:55:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3305 backedges. 1706 proven. 0 refuted. 0 times theorem prover too weak. 1599 trivial. 0 not checked. [2021-12-15 09:55:45,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:55:45,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277755481] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:45,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:55:45,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-15 09:55:45,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211699863] [2021-12-15 09:55:45,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:45,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:45,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:45,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:45,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:55:45,692 INFO L87 Difference]: Start difference. First operand 9216 states and 9528 transitions. Second operand has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:46,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:46,369 INFO L93 Difference]: Finished difference Result 20075 states and 20765 transitions. [2021-12-15 09:55:46,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:46,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1214 [2021-12-15 09:55:46,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:46,378 INFO L225 Difference]: With dead ends: 20075 [2021-12-15 09:55:46,379 INFO L226 Difference]: Without dead ends: 11190 [2021-12-15 09:55:46,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1218 GetRequests, 1213 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:55:46,386 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 173 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:46,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 96 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:55:46,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11190 states. [2021-12-15 09:55:46,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11190 to 10861. [2021-12-15 09:55:46,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10861 states, 10860 states have (on average 1.0309392265193371) internal successors, (11196), 10860 states have internal predecessors, (11196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:46,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10861 states to 10861 states and 11196 transitions. [2021-12-15 09:55:46,487 INFO L78 Accepts]: Start accepts. Automaton has 10861 states and 11196 transitions. Word has length 1214 [2021-12-15 09:55:46,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:46,488 INFO L470 AbstractCegarLoop]: Abstraction has 10861 states and 11196 transitions. [2021-12-15 09:55:46,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:46,488 INFO L276 IsEmpty]: Start isEmpty. Operand 10861 states and 11196 transitions. [2021-12-15 09:55:46,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1432 [2021-12-15 09:55:46,510 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:46,511 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2021-12-15 09:55:46,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 09:55:46,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-15 09:55:46,728 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:46,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:46,728 INFO L85 PathProgramCache]: Analyzing trace with hash -404932997, now seen corresponding path program 1 times [2021-12-15 09:55:46,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:46,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921349174] [2021-12-15 09:55:46,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:46,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:47,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4127 backedges. 2782 proven. 0 refuted. 0 times theorem prover too weak. 1345 trivial. 0 not checked. [2021-12-15 09:55:47,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:47,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921349174] [2021-12-15 09:55:47,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921349174] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:47,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:55:47,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 09:55:47,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671386402] [2021-12-15 09:55:47,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:47,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 09:55:47,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:47,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 09:55:47,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:55:47,230 INFO L87 Difference]: Start difference. First operand 10861 states and 11196 transitions. Second operand has 6 states, 6 states have (on average 121.33333333333333) internal successors, (728), 6 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:48,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:48,553 INFO L93 Difference]: Finished difference Result 21808 states and 22478 transitions. [2021-12-15 09:55:48,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 09:55:48,554 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 121.33333333333333) internal successors, (728), 6 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1431 [2021-12-15 09:55:48,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:48,561 INFO L225 Difference]: With dead ends: 21808 [2021-12-15 09:55:48,561 INFO L226 Difference]: Without dead ends: 10949 [2021-12-15 09:55:48,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 09:55:48,564 INFO L933 BasicCegarLoop]: 433 mSDtfsCounter, 557 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2123 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 2207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:48,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 580 Invalid, 2207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2123 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 09:55:48,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10949 states. [2021-12-15 09:55:48,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10949 to 10861. [2021-12-15 09:55:48,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10861 states, 10860 states have (on average 1.0302946593001843) internal successors, (11189), 10860 states have internal predecessors, (11189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:48,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10861 states to 10861 states and 11189 transitions. [2021-12-15 09:55:48,654 INFO L78 Accepts]: Start accepts. Automaton has 10861 states and 11189 transitions. Word has length 1431 [2021-12-15 09:55:48,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:48,655 INFO L470 AbstractCegarLoop]: Abstraction has 10861 states and 11189 transitions. [2021-12-15 09:55:48,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 121.33333333333333) internal successors, (728), 6 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:48,655 INFO L276 IsEmpty]: Start isEmpty. Operand 10861 states and 11189 transitions. [2021-12-15 09:55:48,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1446 [2021-12-15 09:55:48,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:48,678 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2021-12-15 09:55:48,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 09:55:48,679 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:48,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:48,680 INFO L85 PathProgramCache]: Analyzing trace with hash -307971005, now seen corresponding path program 1 times [2021-12-15 09:55:48,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:48,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66928060] [2021-12-15 09:55:48,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:48,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3921 backedges. 2864 proven. 15 refuted. 0 times theorem prover too weak. 1042 trivial. 0 not checked. [2021-12-15 09:55:49,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:49,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66928060] [2021-12-15 09:55:49,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66928060] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:55:49,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207045062] [2021-12-15 09:55:49,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:49,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:55:49,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:55:49,401 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) [2021-12-15 09:55:49,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 09:55:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:49,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 1693 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:55:49,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:55:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3921 backedges. 2665 proven. 0 refuted. 0 times theorem prover too weak. 1256 trivial. 0 not checked. [2021-12-15 09:55:52,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:55:52,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207045062] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:52,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:55:52,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-15 09:55:52,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614286764] [2021-12-15 09:55:52,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:52,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:52,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:52,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:52,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-15 09:55:52,071 INFO L87 Difference]: Start difference. First operand 10861 states and 11189 transitions. Second operand has 3 states, 3 states have (on average 242.33333333333334) internal successors, (727), 3 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:52,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:52,723 INFO L93 Difference]: Finished difference Result 21720 states and 22376 transitions. [2021-12-15 09:55:52,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:52,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 242.33333333333334) internal successors, (727), 3 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1445 [2021-12-15 09:55:52,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:52,734 INFO L225 Difference]: With dead ends: 21720 [2021-12-15 09:55:52,734 INFO L226 Difference]: Without dead ends: 10861 [2021-12-15 09:55:52,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1451 GetRequests, 1445 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-15 09:55:52,739 INFO L933 BasicCegarLoop]: 428 mSDtfsCounter, 62 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:52,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 434 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:55:52,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10861 states. [2021-12-15 09:55:52,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10861 to 10861. [2021-12-15 09:55:52,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10861 states, 10860 states have (on average 1.030110497237569) internal successors, (11187), 10860 states have internal predecessors, (11187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:52,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10861 states to 10861 states and 11187 transitions. [2021-12-15 09:55:52,829 INFO L78 Accepts]: Start accepts. Automaton has 10861 states and 11187 transitions. Word has length 1445 [2021-12-15 09:55:52,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:52,830 INFO L470 AbstractCegarLoop]: Abstraction has 10861 states and 11187 transitions. [2021-12-15 09:55:52,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 242.33333333333334) internal successors, (727), 3 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:52,831 INFO L276 IsEmpty]: Start isEmpty. Operand 10861 states and 11187 transitions. [2021-12-15 09:55:52,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1532 [2021-12-15 09:55:52,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:52,856 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:55:52,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 09:55:53,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-15 09:55:53,072 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:53,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:53,073 INFO L85 PathProgramCache]: Analyzing trace with hash 830567386, now seen corresponding path program 1 times [2021-12-15 09:55:53,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:53,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618778092] [2021-12-15 09:55:53,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:53,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:53,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4451 backedges. 1753 proven. 351 refuted. 0 times theorem prover too weak. 2347 trivial. 0 not checked. [2021-12-15 09:55:53,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:53,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618778092] [2021-12-15 09:55:53,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618778092] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:55:53,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431826465] [2021-12-15 09:55:53,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:53,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:55:53,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:55:53,684 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) [2021-12-15 09:55:53,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 09:55:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:53,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 1818 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:55:54,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:55:55,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4451 backedges. 1764 proven. 0 refuted. 0 times theorem prover too weak. 2687 trivial. 0 not checked. [2021-12-15 09:55:55,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:55:55,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431826465] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:55,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:55:55,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-15 09:55:55,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575882865] [2021-12-15 09:55:55,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:55,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:55,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:55,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:55,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:55:55,972 INFO L87 Difference]: Start difference. First operand 10861 states and 11187 transitions. Second operand has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:56,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:55:56,646 INFO L93 Difference]: Finished difference Result 22378 states and 23045 transitions. [2021-12-15 09:55:56,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:55:56,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1531 [2021-12-15 09:55:56,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:55:56,658 INFO L225 Difference]: With dead ends: 22378 [2021-12-15 09:55:56,658 INFO L226 Difference]: Without dead ends: 11519 [2021-12-15 09:55:56,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1537 GetRequests, 1533 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:55:56,664 INFO L933 BasicCegarLoop]: 432 mSDtfsCounter, 263 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:55:56,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 438 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:55:56,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11519 states. [2021-12-15 09:55:56,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11519 to 11519. [2021-12-15 09:55:56,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11519 states, 11518 states have (on average 1.0287376280604272) internal successors, (11849), 11518 states have internal predecessors, (11849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:56,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11519 states to 11519 states and 11849 transitions. [2021-12-15 09:55:56,786 INFO L78 Accepts]: Start accepts. Automaton has 11519 states and 11849 transitions. Word has length 1531 [2021-12-15 09:55:56,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:55:56,787 INFO L470 AbstractCegarLoop]: Abstraction has 11519 states and 11849 transitions. [2021-12-15 09:55:56,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:55:56,787 INFO L276 IsEmpty]: Start isEmpty. Operand 11519 states and 11849 transitions. [2021-12-15 09:55:56,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1616 [2021-12-15 09:55:56,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:55:56,819 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2021-12-15 09:55:56,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 09:55:57,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:55:57,024 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:55:57,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:55:57,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1913758370, now seen corresponding path program 1 times [2021-12-15 09:55:57,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:55:57,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783320151] [2021-12-15 09:55:57,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:57,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:55:57,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:57,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5352 backedges. 1874 proven. 459 refuted. 0 times theorem prover too weak. 3019 trivial. 0 not checked. [2021-12-15 09:55:57,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:55:57,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783320151] [2021-12-15 09:55:57,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783320151] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:55:57,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032687974] [2021-12-15 09:55:57,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:55:57,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:55:57,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:55:57,647 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) [2021-12-15 09:55:57,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 09:55:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:55:58,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 1912 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:55:58,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:55:59,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5352 backedges. 1431 proven. 0 refuted. 0 times theorem prover too weak. 3921 trivial. 0 not checked. [2021-12-15 09:55:59,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:55:59,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032687974] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:55:59,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:55:59,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-15 09:55:59,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748572399] [2021-12-15 09:55:59,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:55:59,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:55:59,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:55:59,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:55:59,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:55:59,842 INFO L87 Difference]: Start difference. First operand 11519 states and 11849 transitions. Second operand has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:00,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:00,501 INFO L93 Difference]: Finished difference Result 23036 states and 23696 transitions. [2021-12-15 09:56:00,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:00,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1615 [2021-12-15 09:56:00,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:00,510 INFO L225 Difference]: With dead ends: 23036 [2021-12-15 09:56:00,510 INFO L226 Difference]: Without dead ends: 11519 [2021-12-15 09:56:00,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1621 GetRequests, 1617 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:56:00,517 INFO L933 BasicCegarLoop]: 416 mSDtfsCounter, 118 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:00,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 421 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:56:00,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11519 states. [2021-12-15 09:56:00,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11519 to 11519. [2021-12-15 09:56:00,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11519 states, 11518 states have (on average 1.0256989060600799) internal successors, (11814), 11518 states have internal predecessors, (11814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:00,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11519 states to 11519 states and 11814 transitions. [2021-12-15 09:56:00,608 INFO L78 Accepts]: Start accepts. Automaton has 11519 states and 11814 transitions. Word has length 1615 [2021-12-15 09:56:00,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:00,609 INFO L470 AbstractCegarLoop]: Abstraction has 11519 states and 11814 transitions. [2021-12-15 09:56:00,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:00,610 INFO L276 IsEmpty]: Start isEmpty. Operand 11519 states and 11814 transitions. [2021-12-15 09:56:00,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1702 [2021-12-15 09:56:00,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:00,638 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:00,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 09:56:00,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:56:00,840 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:00,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:00,840 INFO L85 PathProgramCache]: Analyzing trace with hash 747461168, now seen corresponding path program 1 times [2021-12-15 09:56:00,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:00,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152561241] [2021-12-15 09:56:00,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:00,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:01,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5333 backedges. 3531 proven. 738 refuted. 0 times theorem prover too weak. 1064 trivial. 0 not checked. [2021-12-15 09:56:01,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:01,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152561241] [2021-12-15 09:56:01,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152561241] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:56:01,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898151657] [2021-12-15 09:56:01,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:01,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:56:01,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:56:01,617 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) [2021-12-15 09:56:01,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 09:56:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:01,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 1978 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:56:01,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:56:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5333 backedges. 2659 proven. 0 refuted. 0 times theorem prover too weak. 2674 trivial. 0 not checked. [2021-12-15 09:56:04,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:56:04,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898151657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:04,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:56:04,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2021-12-15 09:56:04,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862867683] [2021-12-15 09:56:04,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:04,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:56:04,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:04,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:56:04,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-12-15 09:56:04,376 INFO L87 Difference]: Start difference. First operand 11519 states and 11814 transitions. Second operand has 4 states, 4 states have (on average 191.5) internal successors, (766), 4 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)