./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label02.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 7faac2784283dee994e5ed7918d7d85d1512ca1f167512880a4c4b876443c5f9 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 12:58:35,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 12:58:35,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 12:58:35,088 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 12:58:35,088 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 12:58:35,089 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 12:58:35,090 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 12:58:35,092 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 12:58:35,094 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 12:58:35,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 12:58:35,095 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 12:58:35,097 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 12:58:35,097 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 12:58:35,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 12:58:35,099 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 12:58:35,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 12:58:35,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 12:58:35,101 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 12:58:35,103 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 12:58:35,105 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 12:58:35,106 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 12:58:35,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 12:58:35,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 12:58:35,120 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 12:58:35,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 12:58:35,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 12:58:35,126 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 12:58:35,127 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 12:58:35,127 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 12:58:35,128 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 12:58:35,128 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 12:58:35,129 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 12:58:35,129 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 12:58:35,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 12:58:35,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 12:58:35,131 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 12:58:35,132 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 12:58:35,132 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 12:58:35,132 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 12:58:35,133 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 12:58:35,134 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 12:58:35,135 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 12:58:35,157 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 12:58:35,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 12:58:35,157 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 12:58:35,158 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 12:58:35,159 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 12:58:35,159 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 12:58:35,160 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 12:58:35,160 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 12:58:35,160 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 12:58:35,161 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 12:58:35,161 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 12:58:35,162 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 12:58:35,162 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 12:58:35,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 12:58:35,162 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 12:58:35,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 12:58:35,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 12:58:35,163 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 12:58:35,163 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 12:58:35,163 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 12:58:35,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 12:58:35,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 12:58:35,164 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 12:58:35,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 12:58:35,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:58:35,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 12:58:35,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 12:58:35,165 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 12:58:35,165 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 12:58:35,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 12:58:35,165 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 12:58:35,165 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 12:58:35,166 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 12:58:35,166 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 12:58:35,166 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7faac2784283dee994e5ed7918d7d85d1512ca1f167512880a4c4b876443c5f9 [2021-12-22 12:58:35,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 12:58:35,396 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 12:58:35,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 12:58:35,400 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 12:58:35,401 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 12:58:35,402 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c [2021-12-22 12:58:35,477 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b2b77884/a9849222d910473f945ab7254ebe8746/FLAG6ca02ec04 [2021-12-22 12:58:36,139 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 12:58:36,140 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c [2021-12-22 12:58:36,173 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b2b77884/a9849222d910473f945ab7254ebe8746/FLAG6ca02ec04 [2021-12-22 12:58:36,503 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b2b77884/a9849222d910473f945ab7254ebe8746 [2021-12-22 12:58:36,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 12:58:36,507 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 12:58:36,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 12:58:36,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 12:58:36,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 12:58:36,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:58:36" (1/1) ... [2021-12-22 12:58:36,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13722043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:58:36, skipping insertion in model container [2021-12-22 12:58:36,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:58:36" (1/1) ... [2021-12-22 12:58:36,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 12:58:36,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 12:58:36,947 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/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[8786,8799] [2021-12-22 12:58:37,011 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/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[16076,16089] [2021-12-22 12:58:37,633 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:58:37,641 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 12:58:37,681 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/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[8786,8799] [2021-12-22 12:58:37,690 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/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[16076,16089] [2021-12-22 12:58:38,097 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:58:38,118 INFO L208 MainTranslator]: Completed translation [2021-12-22 12:58:38,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:58:38 WrapperNode [2021-12-22 12:58:38,118 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 12:58:38,119 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 12:58:38,119 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 12:58:38,120 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 12:58:38,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:58:38" (1/1) ... [2021-12-22 12:58:38,174 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:58:38" (1/1) ... [2021-12-22 12:58:38,453 INFO L137 Inliner]: procedures = 36, calls = 21, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 5029 [2021-12-22 12:58:38,453 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 12:58:38,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 12:58:38,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 12:58:38,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 12:58:38,462 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:58:38" (1/1) ... [2021-12-22 12:58:38,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:58:38" (1/1) ... [2021-12-22 12:58:38,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:58:38" (1/1) ... [2021-12-22 12:58:38,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:58:38" (1/1) ... [2021-12-22 12:58:38,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:58:38" (1/1) ... [2021-12-22 12:58:38,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:58:38" (1/1) ... [2021-12-22 12:58:38,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:58:38" (1/1) ... [2021-12-22 12:58:38,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 12:58:38,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 12:58:38,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 12:58:38,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 12:58:38,747 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:58:38" (1/1) ... [2021-12-22 12:58:38,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:58:38,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:58:38,776 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) [2021-12-22 12:58:38,791 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 [2021-12-22 12:58:38,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 12:58:38,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 12:58:38,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 12:58:38,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 12:58:38,890 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 12:58:38,891 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 12:58:42,333 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 12:58:42,350 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 12:58:42,350 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 12:58:42,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:58:42 BoogieIcfgContainer [2021-12-22 12:58:42,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 12:58:42,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 12:58:42,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 12:58:42,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 12:58:42,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:58:36" (1/3) ... [2021-12-22 12:58:42,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f202ad9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:58:42, skipping insertion in model container [2021-12-22 12:58:42,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:58:38" (2/3) ... [2021-12-22 12:58:42,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f202ad9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:58:42, skipping insertion in model container [2021-12-22 12:58:42,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:58:42" (3/3) ... [2021-12-22 12:58:42,362 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c [2021-12-22 12:58:42,366 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 12:58:42,367 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-22 12:58:42,410 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 12:58:42,416 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 [2021-12-22 12:58:42,416 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 12:58:42,445 INFO L276 IsEmpty]: Start isEmpty. Operand has 893 states, 890 states have (on average 1.902247191011236) internal successors, (1693), 892 states have internal predecessors, (1693), 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) [2021-12-22 12:58:42,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 12:58:42,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:58:42,463 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:58:42,464 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:58:42,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:58:42,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1675876582, now seen corresponding path program 1 times [2021-12-22 12:58:42,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:58:42,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174536508] [2021-12-22 12:58:42,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:58:42,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:58:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:58:42,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:58:42,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:58:42,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174536508] [2021-12-22 12:58:42,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174536508] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:58:42,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:58:42,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 12:58:42,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741466299] [2021-12-22 12:58:42,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:58:42,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 12:58:42,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:58:42,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 12:58:42,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 12:58:42,719 INFO L87 Difference]: Start difference. First operand has 893 states, 890 states have (on average 1.902247191011236) internal successors, (1693), 892 states have internal predecessors, (1693), 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 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 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) [2021-12-22 12:58:42,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:58:42,792 INFO L93 Difference]: Finished difference Result 1755 states and 3330 transitions. [2021-12-22 12:58:42,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 12:58:42,794 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 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 30 [2021-12-22 12:58:42,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:58:42,810 INFO L225 Difference]: With dead ends: 1755 [2021-12-22 12:58:42,810 INFO L226 Difference]: Without dead ends: 827 [2021-12-22 12:58:42,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 12:58:42,823 INFO L933 BasicCegarLoop]: 1624 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1624 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:58:42,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1624 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:58:42,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-12-22 12:58:42,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2021-12-22 12:58:42,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 825 states have (on average 1.8909090909090909) internal successors, (1560), 826 states have internal predecessors, (1560), 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) [2021-12-22 12:58:42,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1560 transitions. [2021-12-22 12:58:42,898 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1560 transitions. Word has length 30 [2021-12-22 12:58:42,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:58:42,899 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1560 transitions. [2021-12-22 12:58:42,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 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) [2021-12-22 12:58:42,899 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1560 transitions. [2021-12-22 12:58:42,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 12:58:42,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:58:42,901 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:58:42,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 12:58:42,901 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:58:42,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:58:42,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2021-12-22 12:58:42,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:58:42,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351107734] [2021-12-22 12:58:42,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:58:42,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:58:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:58:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:58:43,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:58:43,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351107734] [2021-12-22 12:58:43,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351107734] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:58:43,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:58:43,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:58:43,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307549664] [2021-12-22 12:58:43,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:58:43,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:58:43,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:58:43,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:58:43,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:58:43,008 INFO L87 Difference]: Start difference. First operand 827 states and 1560 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2021-12-22 12:58:43,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:58:43,142 INFO L93 Difference]: Finished difference Result 875 states and 1633 transitions. [2021-12-22 12:58:43,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 12:58:43,143 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 30 [2021-12-22 12:58:43,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:58:43,148 INFO L225 Difference]: With dead ends: 875 [2021-12-22 12:58:43,148 INFO L226 Difference]: Without dead ends: 827 [2021-12-22 12:58:43,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:58:43,153 INFO L933 BasicCegarLoop]: 1558 mSDtfsCounter, 3 mSDsluCounter, 4648 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6206 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:58:43,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6206 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:58:43,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-12-22 12:58:43,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2021-12-22 12:58:43,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 825 states have (on average 1.863030303030303) internal successors, (1537), 826 states have internal predecessors, (1537), 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) [2021-12-22 12:58:43,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1537 transitions. [2021-12-22 12:58:43,187 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1537 transitions. Word has length 30 [2021-12-22 12:58:43,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:58:43,188 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1537 transitions. [2021-12-22 12:58:43,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2021-12-22 12:58:43,188 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1537 transitions. [2021-12-22 12:58:43,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-22 12:58:43,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:58:43,190 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:58:43,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 12:58:43,190 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:58:43,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:58:43,191 INFO L85 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2021-12-22 12:58:43,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:58:43,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17134682] [2021-12-22 12:58:43,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:58:43,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:58:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:58:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:58:43,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:58:43,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17134682] [2021-12-22 12:58:43,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17134682] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:58:43,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:58:43,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:58:43,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167001920] [2021-12-22 12:58:43,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:58:43,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:58:43,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:58:43,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:58:43,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:58:43,315 INFO L87 Difference]: Start difference. First operand 827 states and 1537 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-12-22 12:58:43,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:58:43,344 INFO L93 Difference]: Finished difference Result 909 states and 1665 transitions. [2021-12-22 12:58:43,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:58:43,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 52 [2021-12-22 12:58:43,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:58:43,349 INFO L225 Difference]: With dead ends: 909 [2021-12-22 12:58:43,349 INFO L226 Difference]: Without dead ends: 865 [2021-12-22 12:58:43,352 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 [2021-12-22 12:58:43,353 INFO L933 BasicCegarLoop]: 1592 mSDtfsCounter, 1498 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:58:43,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1659 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:58:43,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-12-22 12:58:43,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 863. [2021-12-22 12:58:43,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 861 states have (on average 1.8513356562137049) internal successors, (1594), 862 states have internal predecessors, (1594), 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) [2021-12-22 12:58:43,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1594 transitions. [2021-12-22 12:58:43,374 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1594 transitions. Word has length 52 [2021-12-22 12:58:43,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:58:43,374 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 1594 transitions. [2021-12-22 12:58:43,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-12-22 12:58:43,375 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1594 transitions. [2021-12-22 12:58:43,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-22 12:58:43,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:58:43,381 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:58:43,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 12:58:43,381 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:58:43,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:58:43,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2021-12-22 12:58:43,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:58:43,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880981332] [2021-12-22 12:58:43,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:58:43,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:58:43,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:58:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:58:43,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:58:43,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880981332] [2021-12-22 12:58:43,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880981332] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:58:43,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:58:43,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:58:43,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80425291] [2021-12-22 12:58:43,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:58:43,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:58:43,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:58:43,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:58:43,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:58:43,478 INFO L87 Difference]: Start difference. First operand 863 states and 1594 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-12-22 12:58:43,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:58:43,510 INFO L93 Difference]: Finished difference Result 1011 states and 1826 transitions. [2021-12-22 12:58:43,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:58:43,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 52 [2021-12-22 12:58:43,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:58:43,515 INFO L225 Difference]: With dead ends: 1011 [2021-12-22 12:58:43,515 INFO L226 Difference]: Without dead ends: 931 [2021-12-22 12:58:43,516 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 [2021-12-22 12:58:43,521 INFO L933 BasicCegarLoop]: 1587 mSDtfsCounter, 1494 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 1658 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:58:43,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1494 Valid, 1658 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:58:43,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-12-22 12:58:43,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929. [2021-12-22 12:58:43,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 927 states have (on average 1.8306364617044228) internal successors, (1697), 928 states have internal predecessors, (1697), 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) [2021-12-22 12:58:43,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1697 transitions. [2021-12-22 12:58:43,548 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1697 transitions. Word has length 52 [2021-12-22 12:58:43,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:58:43,549 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 1697 transitions. [2021-12-22 12:58:43,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-12-22 12:58:43,550 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1697 transitions. [2021-12-22 12:58:43,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-22 12:58:43,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:58:43,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:58:43,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 12:58:43,552 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:58:43,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:58:43,554 INFO L85 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2021-12-22 12:58:43,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:58:43,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959011207] [2021-12-22 12:58:43,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:58:43,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:58:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:58:43,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:58:43,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:58:43,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959011207] [2021-12-22 12:58:43,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959011207] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:58:43,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:58:43,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:58:43,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960110839] [2021-12-22 12:58:43,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:58:43,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:58:43,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:58:43,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:58:43,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:58:43,632 INFO L87 Difference]: Start difference. First operand 929 states and 1697 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-12-22 12:58:43,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:58:43,670 INFO L93 Difference]: Finished difference Result 1197 states and 2115 transitions. [2021-12-22 12:58:43,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:58:43,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 52 [2021-12-22 12:58:43,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:58:43,677 INFO L225 Difference]: With dead ends: 1197 [2021-12-22 12:58:43,677 INFO L226 Difference]: Without dead ends: 1051 [2021-12-22 12:58:43,678 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 [2021-12-22 12:58:43,678 INFO L933 BasicCegarLoop]: 1582 mSDtfsCounter, 1490 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:58:43,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1490 Valid, 1657 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:58:43,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-12-22 12:58:43,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1049. [2021-12-22 12:58:43,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1047 states have (on average 1.7965616045845272) internal successors, (1881), 1048 states have internal predecessors, (1881), 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) [2021-12-22 12:58:43,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1881 transitions. [2021-12-22 12:58:43,712 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1881 transitions. Word has length 52 [2021-12-22 12:58:43,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:58:43,715 INFO L470 AbstractCegarLoop]: Abstraction has 1049 states and 1881 transitions. [2021-12-22 12:58:43,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-12-22 12:58:43,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1881 transitions. [2021-12-22 12:58:43,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-22 12:58:43,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:58:43,718 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:58:43,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 12:58:43,719 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:58:43,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:58:43,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2021-12-22 12:58:43,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:58:43,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816762830] [2021-12-22 12:58:43,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:58:43,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:58:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:58:43,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:58:43,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:58:43,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816762830] [2021-12-22 12:58:43,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816762830] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:58:43,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:58:43,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:58:43,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857760925] [2021-12-22 12:58:43,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:58:43,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:58:43,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:58:43,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:58:43,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:58:43,775 INFO L87 Difference]: Start difference. First operand 1049 states and 1881 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-12-22 12:58:43,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:58:43,811 INFO L93 Difference]: Finished difference Result 1533 states and 2627 transitions. [2021-12-22 12:58:43,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:58:43,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 52 [2021-12-22 12:58:43,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:58:43,817 INFO L225 Difference]: With dead ends: 1533 [2021-12-22 12:58:43,817 INFO L226 Difference]: Without dead ends: 1267 [2021-12-22 12:58:43,818 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 [2021-12-22 12:58:43,819 INFO L933 BasicCegarLoop]: 1577 mSDtfsCounter, 1486 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1486 SdHoareTripleChecker+Valid, 1656 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:58:43,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1486 Valid, 1656 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:58:43,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-12-22 12:58:43,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1265. [2021-12-22 12:58:43,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1263 states have (on average 1.7458432304038005) internal successors, (2205), 1264 states have internal predecessors, (2205), 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) [2021-12-22 12:58:43,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 2205 transitions. [2021-12-22 12:58:43,886 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 2205 transitions. Word has length 52 [2021-12-22 12:58:43,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:58:43,887 INFO L470 AbstractCegarLoop]: Abstraction has 1265 states and 2205 transitions. [2021-12-22 12:58:43,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-12-22 12:58:43,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 2205 transitions. [2021-12-22 12:58:43,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-22 12:58:43,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:58:43,888 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:58:43,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 12:58:43,889 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:58:43,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:58:43,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2021-12-22 12:58:43,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:58:43,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894670949] [2021-12-22 12:58:43,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:58:43,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:58:43,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:58:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:58:43,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:58:43,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894670949] [2021-12-22 12:58:43,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894670949] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:58:43,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:58:43,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:58:43,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987229794] [2021-12-22 12:58:43,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:58:43,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:58:43,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:58:43,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:58:43,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:58:43,945 INFO L87 Difference]: Start difference. First operand 1265 states and 2205 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2021-12-22 12:58:44,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:58:44,217 INFO L93 Difference]: Finished difference Result 5121 states and 8101 transitions. [2021-12-22 12:58:44,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 12:58:44,218 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 52 [2021-12-22 12:58:44,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:58:44,238 INFO L225 Difference]: With dead ends: 5121 [2021-12-22 12:58:44,238 INFO L226 Difference]: Without dead ends: 4639 [2021-12-22 12:58:44,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-22 12:58:44,242 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 6521 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6521 SdHoareTripleChecker+Valid, 2068 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 12:58:44,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6521 Valid, 2068 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 12:58:44,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4639 states. [2021-12-22 12:58:44,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4639 to 1745. [2021-12-22 12:58:44,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1745 states, 1743 states have (on average 1.6689615605278256) internal successors, (2909), 1744 states have internal predecessors, (2909), 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) [2021-12-22 12:58:44,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 2909 transitions. [2021-12-22 12:58:44,359 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 2909 transitions. Word has length 52 [2021-12-22 12:58:44,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:58:44,360 INFO L470 AbstractCegarLoop]: Abstraction has 1745 states and 2909 transitions. [2021-12-22 12:58:44,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2021-12-22 12:58:44,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 2909 transitions. [2021-12-22 12:58:44,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 12:58:44,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:58:44,361 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:58:44,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 12:58:44,362 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:58:44,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:58:44,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2021-12-22 12:58:44,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:58:44,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449713597] [2021-12-22 12:58:44,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:58:44,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:58:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:58:44,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:58:44,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:58:44,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449713597] [2021-12-22 12:58:44,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449713597] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:58:44,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:58:44,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:58:44,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531672025] [2021-12-22 12:58:44,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:58:44,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:58:44,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:58:44,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:58:44,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:58:44,423 INFO L87 Difference]: Start difference. First operand 1745 states and 2909 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2021-12-22 12:58:44,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:58:44,547 INFO L93 Difference]: Finished difference Result 3151 states and 5009 transitions. [2021-12-22 12:58:44,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:58:44,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 54 [2021-12-22 12:58:44,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:58:44,557 INFO L225 Difference]: With dead ends: 3151 [2021-12-22 12:58:44,557 INFO L226 Difference]: Without dead ends: 2189 [2021-12-22 12:58:44,559 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 [2021-12-22 12:58:44,560 INFO L933 BasicCegarLoop]: 1559 mSDtfsCounter, 1478 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1478 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:58:44,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1478 Valid, 1623 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:58:44,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2021-12-22 12:58:44,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2187. [2021-12-22 12:58:44,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2185 states have (on average 1.6215102974828375) internal successors, (3543), 2186 states have internal predecessors, (3543), 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) [2021-12-22 12:58:44,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3543 transitions. [2021-12-22 12:58:44,662 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3543 transitions. Word has length 54 [2021-12-22 12:58:44,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:58:44,663 INFO L470 AbstractCegarLoop]: Abstraction has 2187 states and 3543 transitions. [2021-12-22 12:58:44,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2021-12-22 12:58:44,663 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3543 transitions. [2021-12-22 12:58:44,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 12:58:44,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:58:44,664 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:58:44,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 12:58:44,664 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:58:44,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:58:44,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1303474603, now seen corresponding path program 1 times [2021-12-22 12:58:44,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:58:44,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022917967] [2021-12-22 12:58:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:58:44,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:58:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:58:44,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:58:44,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:58:44,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022917967] [2021-12-22 12:58:44,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022917967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:58:44,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:58:44,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:58:44,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234501479] [2021-12-22 12:58:44,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:58:44,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:58:44,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:58:44,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:58:44,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:58:44,819 INFO L87 Difference]: Start difference. First operand 2187 states and 3543 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 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) [2021-12-22 12:58:45,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:58:45,033 INFO L93 Difference]: Finished difference Result 3591 states and 5617 transitions. [2021-12-22 12:58:45,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 12:58:45,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 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 54 [2021-12-22 12:58:45,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:58:45,041 INFO L225 Difference]: With dead ends: 3591 [2021-12-22 12:58:45,041 INFO L226 Difference]: Without dead ends: 2189 [2021-12-22 12:58:45,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:58:45,045 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 3072 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3072 SdHoareTripleChecker+Valid, 1732 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:58:45,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3072 Valid, 1732 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:58:45,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2021-12-22 12:58:45,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2187. [2021-12-22 12:58:45,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2185 states have (on average 1.6105263157894736) internal successors, (3519), 2186 states have internal predecessors, (3519), 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) [2021-12-22 12:58:45,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3519 transitions. [2021-12-22 12:58:45,143 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3519 transitions. Word has length 54 [2021-12-22 12:58:45,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:58:45,144 INFO L470 AbstractCegarLoop]: Abstraction has 2187 states and 3519 transitions. [2021-12-22 12:58:45,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 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) [2021-12-22 12:58:45,144 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3519 transitions. [2021-12-22 12:58:45,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-22 12:58:45,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:58:45,145 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:58:45,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 12:58:45,148 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:58:45,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:58:45,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2021-12-22 12:58:45,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:58:45,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389735529] [2021-12-22 12:58:45,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:58:45,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:58:45,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:58:45,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:58:45,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:58:45,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389735529] [2021-12-22 12:58:45,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389735529] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:58:45,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:58:45,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:58:45,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42962230] [2021-12-22 12:58:45,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:58:45,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:58:45,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:58:45,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:58:45,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:58:45,214 INFO L87 Difference]: Start difference. First operand 2187 states and 3519 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 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) [2021-12-22 12:58:45,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:58:45,392 INFO L93 Difference]: Finished difference Result 3589 states and 5568 transitions. [2021-12-22 12:58:45,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 12:58:45,393 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 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 55 [2021-12-22 12:58:45,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:58:45,401 INFO L225 Difference]: With dead ends: 3589 [2021-12-22 12:58:45,401 INFO L226 Difference]: Without dead ends: 2187 [2021-12-22 12:58:45,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-22 12:58:45,403 INFO L933 BasicCegarLoop]: 1503 mSDtfsCounter, 4543 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4543 SdHoareTripleChecker+Valid, 2992 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:58:45,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4543 Valid, 2992 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:58:45,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2021-12-22 12:58:45,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2187. [2021-12-22 12:58:45,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2185 states have (on average 1.59954233409611) internal successors, (3495), 2186 states have internal predecessors, (3495), 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) [2021-12-22 12:58:45,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3495 transitions. [2021-12-22 12:58:45,516 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3495 transitions. Word has length 55 [2021-12-22 12:58:45,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:58:45,517 INFO L470 AbstractCegarLoop]: Abstraction has 2187 states and 3495 transitions. [2021-12-22 12:58:45,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 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) [2021-12-22 12:58:45,517 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3495 transitions. [2021-12-22 12:58:45,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-22 12:58:45,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:58:45,518 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:58:45,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 12:58:45,518 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:58:45,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:58:45,519 INFO L85 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2021-12-22 12:58:45,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:58:45,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283284370] [2021-12-22 12:58:45,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:58:45,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:58:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:58:45,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:58:45,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:58:45,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283284370] [2021-12-22 12:58:45,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283284370] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:58:45,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:58:45,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:58:45,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178801801] [2021-12-22 12:58:45,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:58:45,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:58:45,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:58:45,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:58:45,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:58:45,573 INFO L87 Difference]: Start difference. First operand 2187 states and 3495 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 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) [2021-12-22 12:58:45,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:58:45,766 INFO L93 Difference]: Finished difference Result 3589 states and 5520 transitions. [2021-12-22 12:58:45,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 12:58:45,766 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 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 55 [2021-12-22 12:58:45,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:58:45,774 INFO L225 Difference]: With dead ends: 3589 [2021-12-22 12:58:45,774 INFO L226 Difference]: Without dead ends: 2187 [2021-12-22 12:58:45,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-22 12:58:45,777 INFO L933 BasicCegarLoop]: 1505 mSDtfsCounter, 4627 mSDsluCounter, 1477 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4627 SdHoareTripleChecker+Valid, 2982 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:58:45,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4627 Valid, 2982 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:58:45,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2021-12-22 12:58:45,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2187. [2021-12-22 12:58:45,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2185 states have (on average 1.588558352402746) internal successors, (3471), 2186 states have internal predecessors, (3471), 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) [2021-12-22 12:58:45,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3471 transitions. [2021-12-22 12:58:45,951 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3471 transitions. Word has length 55 [2021-12-22 12:58:45,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:58:45,951 INFO L470 AbstractCegarLoop]: Abstraction has 2187 states and 3471 transitions. [2021-12-22 12:58:45,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 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) [2021-12-22 12:58:45,952 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3471 transitions. [2021-12-22 12:58:45,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-22 12:58:45,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:58:45,952 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:58:45,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 12:58:45,953 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:58:45,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:58:45,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2021-12-22 12:58:45,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:58:45,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595940240] [2021-12-22 12:58:45,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:58:45,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:58:45,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:58:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:58:46,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:58:46,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595940240] [2021-12-22 12:58:46,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595940240] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:58:46,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:58:46,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 12:58:46,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185958137] [2021-12-22 12:58:46,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:58:46,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 12:58:46,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:58:46,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 12:58:46,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:58:46,022 INFO L87 Difference]: Start difference. First operand 2187 states and 3471 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 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) [2021-12-22 12:58:46,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:58:46,347 INFO L93 Difference]: Finished difference Result 3418 states and 5169 transitions. [2021-12-22 12:58:46,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 12:58:46,348 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 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 55 [2021-12-22 12:58:46,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:58:46,360 INFO L225 Difference]: With dead ends: 3418 [2021-12-22 12:58:46,360 INFO L226 Difference]: Without dead ends: 3416 [2021-12-22 12:58:46,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-22 12:58:46,361 INFO L933 BasicCegarLoop]: 1552 mSDtfsCounter, 514 mSDsluCounter, 8978 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 10530 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:58:46,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [514 Valid, 10530 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:58:46,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2021-12-22 12:58:46,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 2283. [2021-12-22 12:58:46,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 2281 states have (on average 1.5602805786935554) internal successors, (3559), 2282 states have internal predecessors, (3559), 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) [2021-12-22 12:58:46,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3559 transitions. [2021-12-22 12:58:46,523 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3559 transitions. Word has length 55 [2021-12-22 12:58:46,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:58:46,523 INFO L470 AbstractCegarLoop]: Abstraction has 2283 states and 3559 transitions. [2021-12-22 12:58:46,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 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) [2021-12-22 12:58:46,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3559 transitions. [2021-12-22 12:58:46,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-22 12:58:46,524 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:58:46,524 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:58:46,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 12:58:46,525 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:58:46,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:58:46,525 INFO L85 PathProgramCache]: Analyzing trace with hash -748597284, now seen corresponding path program 1 times [2021-12-22 12:58:46,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:58:46,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310197290] [2021-12-22 12:58:46,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:58:46,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:58:46,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:58:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:58:46,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:58:46,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310197290] [2021-12-22 12:58:46,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310197290] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:58:46,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:58:46,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 12:58:46,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657132648] [2021-12-22 12:58:46,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:58:46,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:58:46,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:58:46,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:58:46,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:58:46,555 INFO L87 Difference]: Start difference. First operand 2283 states and 3559 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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) [2021-12-22 12:58:49,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:58:49,704 INFO L93 Difference]: Finished difference Result 3787 states and 6432 transitions. [2021-12-22 12:58:49,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:58:49,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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 63 [2021-12-22 12:58:49,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:58:49,715 INFO L225 Difference]: With dead ends: 3787 [2021-12-22 12:58:49,715 INFO L226 Difference]: Without dead ends: 3034 [2021-12-22 12:58:49,716 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 [2021-12-22 12:58:49,717 INFO L933 BasicCegarLoop]: 564 mSDtfsCounter, 834 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-22 12:58:49,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [834 Valid, 571 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-22 12:58:49,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3034 states. [2021-12-22 12:58:49,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3034 to 3034. [2021-12-22 12:58:49,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3034 states, 3032 states have (on average 1.4967018469656992) internal successors, (4538), 3033 states have internal predecessors, (4538), 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) [2021-12-22 12:58:49,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4538 transitions. [2021-12-22 12:58:49,979 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4538 transitions. Word has length 63 [2021-12-22 12:58:49,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:58:49,980 INFO L470 AbstractCegarLoop]: Abstraction has 3034 states and 4538 transitions. [2021-12-22 12:58:49,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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) [2021-12-22 12:58:49,981 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4538 transitions. [2021-12-22 12:58:49,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-22 12:58:49,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:58:49,984 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 12:58:49,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 12:58:49,985 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:58:49,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:58:49,985 INFO L85 PathProgramCache]: Analyzing trace with hash -484645446, now seen corresponding path program 1 times [2021-12-22 12:58:49,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:58:49,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302478582] [2021-12-22 12:58:49,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:58:49,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:58:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:58:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 12:58:50,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:58:50,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302478582] [2021-12-22 12:58:50,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302478582] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:58:50,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:58:50,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:58:50,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128963843] [2021-12-22 12:58:50,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:58:50,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:58:50,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:58:50,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:58:50,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:58:50,063 INFO L87 Difference]: Start difference. First operand 3034 states and 4538 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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) [2021-12-22 12:58:50,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:58:50,786 INFO L93 Difference]: Finished difference Result 9340 states and 13307 transitions. [2021-12-22 12:58:50,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 12:58:50,787 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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 79 [2021-12-22 12:58:50,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:58:50,807 INFO L225 Difference]: With dead ends: 9340 [2021-12-22 12:58:50,808 INFO L226 Difference]: Without dead ends: 7842 [2021-12-22 12:58:50,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-22 12:58:50,813 INFO L933 BasicCegarLoop]: 1592 mSDtfsCounter, 4751 mSDsluCounter, 1738 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4751 SdHoareTripleChecker+Valid, 3330 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:58:50,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4751 Valid, 3330 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:58:50,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2021-12-22 12:58:51,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 4530. [2021-12-22 12:58:51,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4530 states, 4528 states have (on average 1.4580388692579505) internal successors, (6602), 4529 states have internal predecessors, (6602), 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) [2021-12-22 12:58:51,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4530 states to 4530 states and 6602 transitions. [2021-12-22 12:58:51,179 INFO L78 Accepts]: Start accepts. Automaton has 4530 states and 6602 transitions. Word has length 79 [2021-12-22 12:58:51,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:58:51,179 INFO L470 AbstractCegarLoop]: Abstraction has 4530 states and 6602 transitions. [2021-12-22 12:58:51,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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) [2021-12-22 12:58:51,179 INFO L276 IsEmpty]: Start isEmpty. Operand 4530 states and 6602 transitions. [2021-12-22 12:58:51,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-22 12:58:51,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:58:51,181 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 12:58:51,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 12:58:51,182 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:58:51,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:58:51,182 INFO L85 PathProgramCache]: Analyzing trace with hash 2041539034, now seen corresponding path program 1 times [2021-12-22 12:58:51,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:58:51,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839990003] [2021-12-22 12:58:51,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:58:51,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:58:51,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:58:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 12:58:51,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:58:51,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839990003] [2021-12-22 12:58:51,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839990003] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:58:51,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:58:51,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:58:51,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110146264] [2021-12-22 12:58:51,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:58:51,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:58:51,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:58:51,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:58:51,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:58:51,239 INFO L87 Difference]: Start difference. First operand 4530 states and 6602 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 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) [2021-12-22 12:58:51,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:58:51,988 INFO L93 Difference]: Finished difference Result 10836 states and 15371 transitions. [2021-12-22 12:58:51,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 12:58:51,989 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 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 79 [2021-12-22 12:58:51,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:58:52,005 INFO L225 Difference]: With dead ends: 10836 [2021-12-22 12:58:52,006 INFO L226 Difference]: Without dead ends: 9338 [2021-12-22 12:58:52,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-22 12:58:52,010 INFO L933 BasicCegarLoop]: 1592 mSDtfsCounter, 4706 mSDsluCounter, 1787 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4706 SdHoareTripleChecker+Valid, 3379 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:58:52,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4706 Valid, 3379 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:58:52,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9338 states. [2021-12-22 12:58:52,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9338 to 6778. [2021-12-22 12:58:52,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6778 states, 6776 states have (on average 1.42827626918536) internal successors, (9678), 6777 states have internal predecessors, (9678), 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) [2021-12-22 12:58:52,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6778 states to 6778 states and 9678 transitions. [2021-12-22 12:58:52,477 INFO L78 Accepts]: Start accepts. Automaton has 6778 states and 9678 transitions. Word has length 79 [2021-12-22 12:58:52,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:58:52,478 INFO L470 AbstractCegarLoop]: Abstraction has 6778 states and 9678 transitions. [2021-12-22 12:58:52,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 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) [2021-12-22 12:58:52,478 INFO L276 IsEmpty]: Start isEmpty. Operand 6778 states and 9678 transitions. [2021-12-22 12:58:52,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-22 12:58:52,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:58:52,480 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 12:58:52,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 12:58:52,480 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:58:52,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:58:52,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1121788422, now seen corresponding path program 1 times [2021-12-22 12:58:52,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:58:52,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463393331] [2021-12-22 12:58:52,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:58:52,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:58:52,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:58:52,533 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 12:58:52,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:58:52,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463393331] [2021-12-22 12:58:52,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463393331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:58:52,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:58:52,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:58:52,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094412877] [2021-12-22 12:58:52,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:58:52,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:58:52,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:58:52,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:58:52,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:58:52,536 INFO L87 Difference]: Start difference. First operand 6778 states and 9678 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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) [2021-12-22 12:58:53,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:58:53,294 INFO L93 Difference]: Finished difference Result 12332 states and 17435 transitions. [2021-12-22 12:58:53,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 12:58:53,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 79 [2021-12-22 12:58:53,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:58:53,311 INFO L225 Difference]: With dead ends: 12332 [2021-12-22 12:58:53,312 INFO L226 Difference]: Without dead ends: 10834 [2021-12-22 12:58:53,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-22 12:58:53,316 INFO L933 BasicCegarLoop]: 1593 mSDtfsCounter, 4740 mSDsluCounter, 1789 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4740 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:58:53,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4740 Valid, 3382 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:58:53,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10834 states. [2021-12-22 12:58:53,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10834 to 8274. [2021-12-22 12:58:53,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8274 states, 8272 states have (on average 1.4194874274661509) internal successors, (11742), 8273 states have internal predecessors, (11742), 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) [2021-12-22 12:58:53,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8274 states to 8274 states and 11742 transitions. [2021-12-22 12:58:53,933 INFO L78 Accepts]: Start accepts. Automaton has 8274 states and 11742 transitions. Word has length 79 [2021-12-22 12:58:53,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:58:53,933 INFO L470 AbstractCegarLoop]: Abstraction has 8274 states and 11742 transitions. [2021-12-22 12:58:53,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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) [2021-12-22 12:58:53,933 INFO L276 IsEmpty]: Start isEmpty. Operand 8274 states and 11742 transitions. [2021-12-22 12:58:53,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-22 12:58:53,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:58:53,936 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 12:58:53,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 12:58:53,936 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:58:53,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:58:53,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1937719834, now seen corresponding path program 1 times [2021-12-22 12:58:53,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:58:53,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417562967] [2021-12-22 12:58:53,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:58:53,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:58:53,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:58:53,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 12:58:53,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:58:53,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417562967] [2021-12-22 12:58:53,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417562967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:58:53,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:58:53,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:58:53,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359735365] [2021-12-22 12:58:53,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:58:53,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:58:53,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:58:53,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:58:53,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:58:53,987 INFO L87 Difference]: Start difference. First operand 8274 states and 11742 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 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) [2021-12-22 12:58:54,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:58:54,777 INFO L93 Difference]: Finished difference Result 12948 states and 18299 transitions. [2021-12-22 12:58:54,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 12:58:54,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 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 79 [2021-12-22 12:58:54,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:58:54,794 INFO L225 Difference]: With dead ends: 12948 [2021-12-22 12:58:54,795 INFO L226 Difference]: Without dead ends: 11890 [2021-12-22 12:58:54,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-22 12:58:54,798 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 4739 mSDsluCounter, 1745 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4739 SdHoareTripleChecker+Valid, 3335 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:58:54,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4739 Valid, 3335 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:58:54,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11890 states. [2021-12-22 12:58:55,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11890 to 9330. [2021-12-22 12:58:55,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9330 states, 9328 states have (on average 1.4165951972555746) internal successors, (13214), 9329 states have internal predecessors, (13214), 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) [2021-12-22 12:58:55,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9330 states to 9330 states and 13214 transitions. [2021-12-22 12:58:55,502 INFO L78 Accepts]: Start accepts. Automaton has 9330 states and 13214 transitions. Word has length 79 [2021-12-22 12:58:55,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:58:55,503 INFO L470 AbstractCegarLoop]: Abstraction has 9330 states and 13214 transitions. [2021-12-22 12:58:55,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 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) [2021-12-22 12:58:55,503 INFO L276 IsEmpty]: Start isEmpty. Operand 9330 states and 13214 transitions. [2021-12-22 12:58:55,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-22 12:58:55,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:58:55,506 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 12:58:55,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 12:58:55,507 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:58:55,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:58:55,507 INFO L85 PathProgramCache]: Analyzing trace with hash -596667294, now seen corresponding path program 1 times [2021-12-22 12:58:55,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:58:55,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433064000] [2021-12-22 12:58:55,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:58:55,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:58:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:58:55,752 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:58:55,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:58:55,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433064000] [2021-12-22 12:58:55,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433064000] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:58:55,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251446075] [2021-12-22 12:58:55,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:58:55,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:58:55,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:58:55,755 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) [2021-12-22 12:58:55,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 12:58:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:58:55,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 12:58:55,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:58:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 12:58:56,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 12:58:56,508 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 12:58:56,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251446075] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 12:58:56,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 12:58:56,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-22 12:58:56,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158614738] [2021-12-22 12:58:56,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 12:58:56,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 12:58:56,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:58:56,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 12:58:56,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-22 12:58:56,512 INFO L87 Difference]: Start difference. First operand 9330 states and 13214 transitions. Second operand has 18 states, 18 states have (on average 12.38888888888889) internal successors, (223), 18 states have internal predecessors, (223), 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) [2021-12-22 12:59:06,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:59:06,732 INFO L93 Difference]: Finished difference Result 83893 states and 115109 transitions. [2021-12-22 12:59:06,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-12-22 12:59:06,733 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 12.38888888888889) internal successors, (223), 18 states have internal predecessors, (223), 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 80 [2021-12-22 12:59:06,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:59:06,844 INFO L225 Difference]: With dead ends: 83893 [2021-12-22 12:59:06,845 INFO L226 Difference]: Without dead ends: 76099 [2021-12-22 12:59:06,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7219 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3063, Invalid=14229, Unknown=0, NotChecked=0, Total=17292 [2021-12-22 12:59:06,877 INFO L933 BasicCegarLoop]: 1632 mSDtfsCounter, 14076 mSDsluCounter, 5784 mSDsCounter, 0 mSdLazyCounter, 1947 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14076 SdHoareTripleChecker+Valid, 7416 SdHoareTripleChecker+Invalid, 2223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 1947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 12:59:06,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14076 Valid, 7416 Invalid, 2223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 1947 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 12:59:06,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76099 states. [2021-12-22 12:59:12,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76099 to 48130. [2021-12-22 12:59:12,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48130 states, 48128 states have (on average 1.358419215425532) internal successors, (65378), 48129 states have internal predecessors, (65378), 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) [2021-12-22 12:59:12,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48130 states to 48130 states and 65378 transitions. [2021-12-22 12:59:12,158 INFO L78 Accepts]: Start accepts. Automaton has 48130 states and 65378 transitions. Word has length 80 [2021-12-22 12:59:12,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:59:12,158 INFO L470 AbstractCegarLoop]: Abstraction has 48130 states and 65378 transitions. [2021-12-22 12:59:12,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.38888888888889) internal successors, (223), 18 states have internal predecessors, (223), 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) [2021-12-22 12:59:12,158 INFO L276 IsEmpty]: Start isEmpty. Operand 48130 states and 65378 transitions. [2021-12-22 12:59:12,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-22 12:59:12,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:59:12,161 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 12:59:12,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 12:59:12,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-22 12:59:12,363 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:59:12,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:59:12,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1057956914, now seen corresponding path program 1 times [2021-12-22 12:59:12,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:59:12,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694506406] [2021-12-22 12:59:12,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:59:12,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:59:12,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:59:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:59:12,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:59:12,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694506406] [2021-12-22 12:59:12,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694506406] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:59:12,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557617435] [2021-12-22 12:59:12,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:59:12,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:59:12,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:59:12,596 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) [2021-12-22 12:59:12,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 12:59:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:59:12,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-22 12:59:12,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:59:15,768 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:59:15,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 12:59:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:59:17,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557617435] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 12:59:17,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 12:59:17,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 16] total 41 [2021-12-22 12:59:17,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414743209] [2021-12-22 12:59:17,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 12:59:17,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-22 12:59:17,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:59:17,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-22 12:59:17,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1504, Unknown=0, NotChecked=0, Total=1722 [2021-12-22 12:59:17,313 INFO L87 Difference]: Start difference. First operand 48130 states and 65378 transitions. Second operand has 42 states, 42 states have (on average 4.976190476190476) internal successors, (209), 41 states have internal predecessors, (209), 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) [2021-12-22 12:59:26,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:59:26,905 INFO L93 Difference]: Finished difference Result 103233 states and 138576 transitions. [2021-12-22 12:59:26,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-22 12:59:26,905 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.976190476190476) internal successors, (209), 41 states have internal predecessors, (209), 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 81 [2021-12-22 12:59:26,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:59:26,992 INFO L225 Difference]: With dead ends: 103233 [2021-12-22 12:59:26,992 INFO L226 Difference]: Without dead ends: 66449 [2021-12-22 12:59:27,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=942, Invalid=4170, Unknown=0, NotChecked=0, Total=5112 [2021-12-22 12:59:27,031 INFO L933 BasicCegarLoop]: 1556 mSDtfsCounter, 15254 mSDsluCounter, 22133 mSDsCounter, 0 mSdLazyCounter, 2144 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15254 SdHoareTripleChecker+Valid, 23689 SdHoareTripleChecker+Invalid, 2373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 12:59:27,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15254 Valid, 23689 Invalid, 2373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2144 Invalid, 0 Unknown, 121 Unchecked, 1.2s Time] [2021-12-22 12:59:27,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66449 states. [2021-12-22 12:59:31,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66449 to 48200. [2021-12-22 12:59:31,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48200 states, 48198 states have (on average 1.3581683887298228) internal successors, (65461), 48199 states have internal predecessors, (65461), 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) [2021-12-22 12:59:31,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48200 states to 48200 states and 65461 transitions. [2021-12-22 12:59:31,778 INFO L78 Accepts]: Start accepts. Automaton has 48200 states and 65461 transitions. Word has length 81 [2021-12-22 12:59:31,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:59:31,779 INFO L470 AbstractCegarLoop]: Abstraction has 48200 states and 65461 transitions. [2021-12-22 12:59:31,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.976190476190476) internal successors, (209), 41 states have internal predecessors, (209), 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) [2021-12-22 12:59:31,779 INFO L276 IsEmpty]: Start isEmpty. Operand 48200 states and 65461 transitions. [2021-12-22 12:59:31,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-22 12:59:31,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:59:31,782 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 12:59:31,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 12:59:32,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:59:32,001 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:59:32,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:59:32,001 INFO L85 PathProgramCache]: Analyzing trace with hash 825526308, now seen corresponding path program 1 times [2021-12-22 12:59:32,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:59:32,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459073311] [2021-12-22 12:59:32,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:59:32,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:59:32,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:59:32,143 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:59:32,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:59:32,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459073311] [2021-12-22 12:59:32,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459073311] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:59:32,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54419708] [2021-12-22 12:59:32,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:59:32,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:59:32,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:59:32,146 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) [2021-12-22 12:59:32,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 12:59:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:59:32,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 12:59:32,238 INFO L286 TraceCheckSpWp]: Computing forward predicates...