./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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_label01.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 aa83d3f5173117ef698c13f0bcf19338ee3f6f59e63ac9b8ac7bd80f7d40c635 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 07:46:27,269 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 07:46:27,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 07:46:27,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 07:46:27,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 07:46:27,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 07:46:27,308 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 07:46:27,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 07:46:27,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 07:46:27,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 07:46:27,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 07:46:27,318 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 07:46:27,318 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 07:46:27,319 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 07:46:27,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 07:46:27,324 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 07:46:27,325 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 07:46:27,326 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 07:46:27,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 07:46:27,332 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 07:46:27,333 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 07:46:27,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 07:46:27,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 07:46:27,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 07:46:27,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 07:46:27,342 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 07:46:27,342 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 07:46:27,342 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 07:46:27,343 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 07:46:27,343 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 07:46:27,344 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 07:46:27,344 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 07:46:27,345 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 07:46:27,346 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 07:46:27,347 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 07:46:27,348 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 07:46:27,348 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 07:46:27,348 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 07:46:27,348 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 07:46:27,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 07:46:27,349 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 07:46:27,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 07:46:27,351 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 07:46:27,376 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 07:46:27,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 07:46:27,377 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 07:46:27,377 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 07:46:27,377 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 07:46:27,377 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 07:46:27,378 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 07:46:27,378 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 07:46:27,378 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 07:46:27,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 07:46:27,379 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 07:46:27,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 07:46:27,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 07:46:27,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 07:46:27,385 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 07:46:27,385 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 07:46:27,385 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 07:46:27,385 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 07:46:27,386 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 07:46:27,386 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 07:46:27,386 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 07:46:27,386 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 07:46:27,386 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 07:46:27,387 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 07:46:27,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 07:46:27,387 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 07:46:27,387 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 07:46:27,387 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 07:46:27,387 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 07:46:27,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 07:46:27,388 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 07:46:27,388 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 07:46:27,388 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 07:46:27,388 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa83d3f5173117ef698c13f0bcf19338ee3f6f59e63ac9b8ac7bd80f7d40c635 [2022-07-21 07:46:27,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 07:46:27,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 07:46:27,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 07:46:27,685 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 07:46:27,686 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 07:46:27,688 INFO L432 ainManager$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_label01.c [2022-07-21 07:46:27,736 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00d8e45bc/ba6256dcf2d7444fad43a48b07271e16/FLAGce4d0475e [2022-07-21 07:46:28,342 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 07:46:28,342 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c [2022-07-21 07:46:28,364 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00d8e45bc/ba6256dcf2d7444fad43a48b07271e16/FLAGce4d0475e [2022-07-21 07:46:28,767 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00d8e45bc/ba6256dcf2d7444fad43a48b07271e16 [2022-07-21 07:46:28,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 07:46:28,770 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 07:46:28,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 07:46:28,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 07:46:28,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 07:46:28,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:46:28" (1/1) ... [2022-07-21 07:46:28,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3307120a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:46:28, skipping insertion in model container [2022-07-21 07:46:28,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:46:28" (1/1) ... [2022-07-21 07:46:28,781 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 07:46:28,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 07:46:29,178 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_label01.c[8786,8799] [2022-07-21 07:46:29,212 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_label01.c[14341,14354] [2022-07-21 07:46:29,781 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 07:46:29,788 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 07:46:29,817 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_label01.c[8786,8799] [2022-07-21 07:46:29,823 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_label01.c[14341,14354] [2022-07-21 07:46:30,177 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 07:46:30,195 INFO L208 MainTranslator]: Completed translation [2022-07-21 07:46:30,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:46:30 WrapperNode [2022-07-21 07:46:30,195 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 07:46:30,196 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 07:46:30,196 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 07:46:30,196 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 07:46:30,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:46:30" (1/1) ... [2022-07-21 07:46:30,248 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:46:30" (1/1) ... [2022-07-21 07:46:30,557 INFO L137 Inliner]: procedures = 36, calls = 21, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 5029 [2022-07-21 07:46:30,557 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 07:46:30,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 07:46:30,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 07:46:30,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 07:46:30,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:46:30" (1/1) ... [2022-07-21 07:46:30,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:46:30" (1/1) ... [2022-07-21 07:46:30,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:46:30" (1/1) ... [2022-07-21 07:46:30,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:46:30" (1/1) ... [2022-07-21 07:46:30,808 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:46:30" (1/1) ... [2022-07-21 07:46:30,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:46:30" (1/1) ... [2022-07-21 07:46:30,860 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:46:30" (1/1) ... [2022-07-21 07:46:30,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 07:46:30,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 07:46:30,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 07:46:30,899 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 07:46:30,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:46:30" (1/1) ... [2022-07-21 07:46:30,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 07:46:30,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 07:46:30,920 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) [2022-07-21 07:46:30,934 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 [2022-07-21 07:46:30,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 07:46:30,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 07:46:30,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 07:46:30,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 07:46:31,009 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 07:46:31,010 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 07:46:33,599 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 07:46:33,626 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 07:46:33,626 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 07:46:33,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:46:33 BoogieIcfgContainer [2022-07-21 07:46:33,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 07:46:33,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 07:46:33,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 07:46:33,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 07:46:33,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:46:28" (1/3) ... [2022-07-21 07:46:33,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1717e041 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:46:33, skipping insertion in model container [2022-07-21 07:46:33,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:46:30" (2/3) ... [2022-07-21 07:46:33,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1717e041 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:46:33, skipping insertion in model container [2022-07-21 07:46:33,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:46:33" (3/3) ... [2022-07-21 07:46:33,635 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c [2022-07-21 07:46:33,646 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 07:46:33,659 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-21 07:46:33,722 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 07:46:33,727 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3f23c5c7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@50567dba [2022-07-21 07:46:33,728 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 07:46:33,733 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) [2022-07-21 07:46:33,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 07:46:33,739 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:46:33,739 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:46:33,740 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:46:33,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:46:33,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1675876582, now seen corresponding path program 1 times [2022-07-21 07:46:33,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:46:33,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874413019] [2022-07-21 07:46:33,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:46:33,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:46:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:46:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:46:33,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:46:33,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874413019] [2022-07-21 07:46:33,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874413019] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:46:33,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:46:33,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 07:46:33,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622778458] [2022-07-21 07:46:33,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:46:33,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 07:46:33,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:46:33,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 07:46:33,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 07:46:33,871 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) [2022-07-21 07:46:33,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:46:33,914 INFO L93 Difference]: Finished difference Result 1755 states and 3330 transitions. [2022-07-21 07:46:33,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 07:46:33,916 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 [2022-07-21 07:46:33,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:46:33,929 INFO L225 Difference]: With dead ends: 1755 [2022-07-21 07:46:33,929 INFO L226 Difference]: Without dead ends: 827 [2022-07-21 07:46:33,934 INFO L412 NwaCegarLoop]: 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 [2022-07-21 07:46:33,937 INFO L413 NwaCegarLoop]: 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 [2022-07-21 07:46:33,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1624 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:46:33,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-07-21 07:46:33,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2022-07-21 07:46:33,982 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) [2022-07-21 07:46:33,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1560 transitions. [2022-07-21 07:46:33,985 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1560 transitions. Word has length 30 [2022-07-21 07:46:33,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:46:33,985 INFO L495 AbstractCegarLoop]: Abstraction has 827 states and 1560 transitions. [2022-07-21 07:46:33,986 INFO L496 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) [2022-07-21 07:46:33,986 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1560 transitions. [2022-07-21 07:46:33,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 07:46:33,987 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:46:33,987 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:46:33,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 07:46:33,987 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:46:33,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:46:33,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2022-07-21 07:46:33,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:46:33,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143858677] [2022-07-21 07:46:33,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:46:33,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:46:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:46:34,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:46:34,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:46:34,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143858677] [2022-07-21 07:46:34,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143858677] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:46:34,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:46:34,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 07:46:34,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313308835] [2022-07-21 07:46:34,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:46:34,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 07:46:34,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:46:34,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 07:46:34,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 07:46:34,045 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) [2022-07-21 07:46:34,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:46:34,138 INFO L93 Difference]: Finished difference Result 875 states and 1633 transitions. [2022-07-21 07:46:34,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 07:46:34,138 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 [2022-07-21 07:46:34,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:46:34,142 INFO L225 Difference]: With dead ends: 875 [2022-07-21 07:46:34,142 INFO L226 Difference]: Without dead ends: 827 [2022-07-21 07:46:34,142 INFO L412 NwaCegarLoop]: 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 [2022-07-21 07:46:34,143 INFO L413 NwaCegarLoop]: 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 [2022-07-21 07:46:34,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6206 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:46:34,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-07-21 07:46:34,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2022-07-21 07:46:34,157 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) [2022-07-21 07:46:34,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1537 transitions. [2022-07-21 07:46:34,159 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1537 transitions. Word has length 30 [2022-07-21 07:46:34,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:46:34,159 INFO L495 AbstractCegarLoop]: Abstraction has 827 states and 1537 transitions. [2022-07-21 07:46:34,160 INFO L496 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) [2022-07-21 07:46:34,160 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1537 transitions. [2022-07-21 07:46:34,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 07:46:34,161 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:46:34,161 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:46:34,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 07:46:34,162 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:46:34,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:46:34,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1620709547, now seen corresponding path program 1 times [2022-07-21 07:46:34,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:46:34,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978709274] [2022-07-21 07:46:34,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:46:34,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:46:34,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:46:34,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:46:34,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:46:34,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978709274] [2022-07-21 07:46:34,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978709274] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:46:34,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:46:34,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 07:46:34,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117150599] [2022-07-21 07:46:34,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:46:34,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 07:46:34,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:46:34,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 07:46:34,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 07:46:34,246 INFO L87 Difference]: Start difference. First operand 827 states and 1537 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 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) [2022-07-21 07:46:36,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:46:36,871 INFO L93 Difference]: Finished difference Result 2331 states and 4410 transitions. [2022-07-21 07:46:36,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 07:46:36,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 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 48 [2022-07-21 07:46:36,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:46:36,878 INFO L225 Difference]: With dead ends: 2331 [2022-07-21 07:46:36,878 INFO L226 Difference]: Without dead ends: 1578 [2022-07-21 07:46:36,879 INFO L412 NwaCegarLoop]: 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 [2022-07-21 07:46:36,880 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 868 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2274 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 2865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 2274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-21 07:46:36,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [868 Valid, 526 Invalid, 2865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 2274 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-21 07:46:36,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2022-07-21 07:46:36,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1578. [2022-07-21 07:46:36,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1576 states have (on average 1.6269035532994924) internal successors, (2564), 1577 states have internal predecessors, (2564), 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) [2022-07-21 07:46:36,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2564 transitions. [2022-07-21 07:46:36,920 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2564 transitions. Word has length 48 [2022-07-21 07:46:36,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:46:36,920 INFO L495 AbstractCegarLoop]: Abstraction has 1578 states and 2564 transitions. [2022-07-21 07:46:36,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 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) [2022-07-21 07:46:36,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2564 transitions. [2022-07-21 07:46:36,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 07:46:36,922 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:46:36,922 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:46:36,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 07:46:36,922 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:46:36,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:46:36,923 INFO L85 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2022-07-21 07:46:36,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:46:36,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504376917] [2022-07-21 07:46:36,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:46:36,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:46:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:46:36,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:46:36,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:46:36,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504376917] [2022-07-21 07:46:36,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504376917] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:46:36,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:46:36,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 07:46:36,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895944234] [2022-07-21 07:46:36,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:46:36,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 07:46:36,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:46:36,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 07:46:36,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 07:46:36,972 INFO L87 Difference]: Start difference. First operand 1578 states and 2564 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) [2022-07-21 07:46:36,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:46:36,994 INFO L93 Difference]: Finished difference Result 1660 states and 2692 transitions. [2022-07-21 07:46:36,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 07:46:36,994 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 [2022-07-21 07:46:36,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:46:36,999 INFO L225 Difference]: With dead ends: 1660 [2022-07-21 07:46:36,999 INFO L226 Difference]: Without dead ends: 1616 [2022-07-21 07:46:37,000 INFO L412 NwaCegarLoop]: 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 [2022-07-21 07:46:37,001 INFO L413 NwaCegarLoop]: 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 [2022-07-21 07:46:37,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1498 Valid, 1659 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:46:37,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2022-07-21 07:46:37,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1614. [2022-07-21 07:46:37,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1612 states have (on average 1.6259305210918114) internal successors, (2621), 1613 states have internal predecessors, (2621), 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) [2022-07-21 07:46:37,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2621 transitions. [2022-07-21 07:46:37,023 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2621 transitions. Word has length 52 [2022-07-21 07:46:37,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:46:37,023 INFO L495 AbstractCegarLoop]: Abstraction has 1614 states and 2621 transitions. [2022-07-21 07:46:37,023 INFO L496 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) [2022-07-21 07:46:37,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2621 transitions. [2022-07-21 07:46:37,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 07:46:37,024 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:46:37,025 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:46:37,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 07:46:37,025 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:46:37,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:46:37,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2022-07-21 07:46:37,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:46:37,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816513650] [2022-07-21 07:46:37,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:46:37,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:46:37,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:46:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:46:37,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:46:37,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816513650] [2022-07-21 07:46:37,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816513650] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:46:37,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:46:37,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 07:46:37,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563027053] [2022-07-21 07:46:37,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:46:37,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 07:46:37,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:46:37,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 07:46:37,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 07:46:37,068 INFO L87 Difference]: Start difference. First operand 1614 states and 2621 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) [2022-07-21 07:46:37,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:46:37,092 INFO L93 Difference]: Finished difference Result 1762 states and 2853 transitions. [2022-07-21 07:46:37,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 07:46:37,092 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 [2022-07-21 07:46:37,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:46:37,097 INFO L225 Difference]: With dead ends: 1762 [2022-07-21 07:46:37,098 INFO L226 Difference]: Without dead ends: 1682 [2022-07-21 07:46:37,098 INFO L412 NwaCegarLoop]: 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 [2022-07-21 07:46:37,100 INFO L413 NwaCegarLoop]: 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 [2022-07-21 07:46:37,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1494 Valid, 1658 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:46:37,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2022-07-21 07:46:37,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1680. [2022-07-21 07:46:37,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1678 states have (on average 1.6233611442193088) internal successors, (2724), 1679 states have internal predecessors, (2724), 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) [2022-07-21 07:46:37,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 2724 transitions. [2022-07-21 07:46:37,131 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 2724 transitions. Word has length 52 [2022-07-21 07:46:37,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:46:37,133 INFO L495 AbstractCegarLoop]: Abstraction has 1680 states and 2724 transitions. [2022-07-21 07:46:37,134 INFO L496 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) [2022-07-21 07:46:37,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 2724 transitions. [2022-07-21 07:46:37,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 07:46:37,137 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:46:37,138 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:46:37,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 07:46:37,140 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:46:37,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:46:37,146 INFO L85 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2022-07-21 07:46:37,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:46:37,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614588948] [2022-07-21 07:46:37,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:46:37,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:46:37,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:46:37,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:46:37,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:46:37,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614588948] [2022-07-21 07:46:37,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614588948] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:46:37,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:46:37,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 07:46:37,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035304040] [2022-07-21 07:46:37,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:46:37,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 07:46:37,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:46:37,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 07:46:37,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 07:46:37,194 INFO L87 Difference]: Start difference. First operand 1680 states and 2724 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) [2022-07-21 07:46:37,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:46:37,224 INFO L93 Difference]: Finished difference Result 1948 states and 3142 transitions. [2022-07-21 07:46:37,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 07:46:37,224 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 [2022-07-21 07:46:37,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:46:37,230 INFO L225 Difference]: With dead ends: 1948 [2022-07-21 07:46:37,230 INFO L226 Difference]: Without dead ends: 1802 [2022-07-21 07:46:37,231 INFO L412 NwaCegarLoop]: 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 [2022-07-21 07:46:37,235 INFO L413 NwaCegarLoop]: 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 [2022-07-21 07:46:37,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1490 Valid, 1657 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:46:37,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2022-07-21 07:46:37,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1800. [2022-07-21 07:46:37,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1798 states have (on average 1.617352614015573) internal successors, (2908), 1799 states have internal predecessors, (2908), 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) [2022-07-21 07:46:37,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 2908 transitions. [2022-07-21 07:46:37,267 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 2908 transitions. Word has length 52 [2022-07-21 07:46:37,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:46:37,267 INFO L495 AbstractCegarLoop]: Abstraction has 1800 states and 2908 transitions. [2022-07-21 07:46:37,267 INFO L496 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) [2022-07-21 07:46:37,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 2908 transitions. [2022-07-21 07:46:37,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 07:46:37,268 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:46:37,268 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:46:37,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 07:46:37,269 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:46:37,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:46:37,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2022-07-21 07:46:37,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:46:37,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497261902] [2022-07-21 07:46:37,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:46:37,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:46:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:46:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:46:37,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:46:37,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497261902] [2022-07-21 07:46:37,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497261902] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:46:37,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:46:37,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 07:46:37,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063738980] [2022-07-21 07:46:37,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:46:37,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 07:46:37,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:46:37,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 07:46:37,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 07:46:37,358 INFO L87 Difference]: Start difference. First operand 1800 states and 2908 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) [2022-07-21 07:46:37,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:46:37,388 INFO L93 Difference]: Finished difference Result 2284 states and 3654 transitions. [2022-07-21 07:46:37,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 07:46:37,389 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 [2022-07-21 07:46:37,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:46:37,397 INFO L225 Difference]: With dead ends: 2284 [2022-07-21 07:46:37,397 INFO L226 Difference]: Without dead ends: 2018 [2022-07-21 07:46:37,398 INFO L412 NwaCegarLoop]: 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 [2022-07-21 07:46:37,399 INFO L413 NwaCegarLoop]: 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 [2022-07-21 07:46:37,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1486 Valid, 1656 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:46:37,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2022-07-21 07:46:37,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 2016. [2022-07-21 07:46:37,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 2014 states have (on average 1.6047666335650448) internal successors, (3232), 2015 states have internal predecessors, (3232), 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) [2022-07-21 07:46:37,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 3232 transitions. [2022-07-21 07:46:37,436 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 3232 transitions. Word has length 52 [2022-07-21 07:46:37,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:46:37,436 INFO L495 AbstractCegarLoop]: Abstraction has 2016 states and 3232 transitions. [2022-07-21 07:46:37,437 INFO L496 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) [2022-07-21 07:46:37,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 3232 transitions. [2022-07-21 07:46:37,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 07:46:37,439 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:46:37,439 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:46:37,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 07:46:37,440 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:46:37,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:46:37,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2022-07-21 07:46:37,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:46:37,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877319566] [2022-07-21 07:46:37,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:46:37,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:46:37,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:46:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:46:37,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:46:37,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877319566] [2022-07-21 07:46:37,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877319566] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:46:37,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:46:37,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 07:46:37,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775214890] [2022-07-21 07:46:37,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:46:37,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 07:46:37,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:46:37,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 07:46:37,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 07:46:37,508 INFO L87 Difference]: Start difference. First operand 2016 states and 3232 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) [2022-07-21 07:46:37,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:46:37,692 INFO L93 Difference]: Finished difference Result 5872 states and 9128 transitions. [2022-07-21 07:46:37,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 07:46:37,693 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 [2022-07-21 07:46:37,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:46:37,710 INFO L225 Difference]: With dead ends: 5872 [2022-07-21 07:46:37,710 INFO L226 Difference]: Without dead ends: 5390 [2022-07-21 07:46:37,714 INFO L412 NwaCegarLoop]: 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 [2022-07-21 07:46:37,715 INFO L413 NwaCegarLoop]: 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, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:46:37,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6521 Valid, 2068 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:46:37,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5390 states. [2022-07-21 07:46:37,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5390 to 2496. [2022-07-21 07:46:37,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 2494 states have (on average 1.578187650360866) internal successors, (3936), 2495 states have internal predecessors, (3936), 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) [2022-07-21 07:46:37,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 3936 transitions. [2022-07-21 07:46:37,795 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 3936 transitions. Word has length 52 [2022-07-21 07:46:37,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:46:37,796 INFO L495 AbstractCegarLoop]: Abstraction has 2496 states and 3936 transitions. [2022-07-21 07:46:37,796 INFO L496 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) [2022-07-21 07:46:37,796 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 3936 transitions. [2022-07-21 07:46:37,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 07:46:37,798 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:46:37,798 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:46:37,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 07:46:37,799 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:46:37,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:46:37,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2022-07-21 07:46:37,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:46:37,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165782368] [2022-07-21 07:46:37,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:46:37,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:46:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:46:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:46:37,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:46:37,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165782368] [2022-07-21 07:46:37,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165782368] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:46:37,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:46:37,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 07:46:37,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386230521] [2022-07-21 07:46:37,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:46:37,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 07:46:37,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:46:37,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 07:46:37,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 07:46:37,853 INFO L87 Difference]: Start difference. First operand 2496 states and 3936 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) [2022-07-21 07:46:37,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:46:37,928 INFO L93 Difference]: Finished difference Result 3902 states and 6036 transitions. [2022-07-21 07:46:37,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 07:46:37,929 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 [2022-07-21 07:46:37,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:46:37,937 INFO L225 Difference]: With dead ends: 3902 [2022-07-21 07:46:37,937 INFO L226 Difference]: Without dead ends: 2940 [2022-07-21 07:46:37,938 INFO L412 NwaCegarLoop]: 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 [2022-07-21 07:46:37,939 INFO L413 NwaCegarLoop]: 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 [2022-07-21 07:46:37,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1478 Valid, 1623 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:46:37,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2022-07-21 07:46:38,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2938. [2022-07-21 07:46:38,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2936 states have (on average 1.5565395095367847) internal successors, (4570), 2937 states have internal predecessors, (4570), 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) [2022-07-21 07:46:38,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4570 transitions. [2022-07-21 07:46:38,020 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4570 transitions. Word has length 54 [2022-07-21 07:46:38,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:46:38,020 INFO L495 AbstractCegarLoop]: Abstraction has 2938 states and 4570 transitions. [2022-07-21 07:46:38,020 INFO L496 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) [2022-07-21 07:46:38,020 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4570 transitions. [2022-07-21 07:46:38,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 07:46:38,021 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:46:38,021 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:46:38,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 07:46:38,021 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:46:38,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:46:38,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1303474603, now seen corresponding path program 1 times [2022-07-21 07:46:38,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:46:38,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917273240] [2022-07-21 07:46:38,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:46:38,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:46:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:46:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:46:38,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:46:38,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917273240] [2022-07-21 07:46:38,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917273240] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:46:38,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:46:38,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 07:46:38,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408398976] [2022-07-21 07:46:38,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:46:38,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 07:46:38,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:46:38,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 07:46:38,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-21 07:46:38,148 INFO L87 Difference]: Start difference. First operand 2938 states and 4570 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) [2022-07-21 07:46:38,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:46:38,314 INFO L93 Difference]: Finished difference Result 4342 states and 6644 transitions. [2022-07-21 07:46:38,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 07:46:38,315 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 [2022-07-21 07:46:38,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:46:38,322 INFO L225 Difference]: With dead ends: 4342 [2022-07-21 07:46:38,322 INFO L226 Difference]: Without dead ends: 2940 [2022-07-21 07:46:38,324 INFO L412 NwaCegarLoop]: 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 [2022-07-21 07:46:38,325 INFO L413 NwaCegarLoop]: 1531 mSDtfsCounter, 1590 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1590 SdHoareTripleChecker+Valid, 1793 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:46:38,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1590 Valid, 1793 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:46:38,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2022-07-21 07:46:38,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2938. [2022-07-21 07:46:38,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2936 states have (on average 1.5483651226158037) internal successors, (4546), 2937 states have internal predecessors, (4546), 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) [2022-07-21 07:46:38,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4546 transitions. [2022-07-21 07:46:38,423 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4546 transitions. Word has length 54 [2022-07-21 07:46:38,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:46:38,424 INFO L495 AbstractCegarLoop]: Abstraction has 2938 states and 4546 transitions. [2022-07-21 07:46:38,424 INFO L496 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) [2022-07-21 07:46:38,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4546 transitions. [2022-07-21 07:46:38,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-21 07:46:38,425 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:46:38,425 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:46:38,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 07:46:38,425 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:46:38,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:46:38,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2022-07-21 07:46:38,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:46:38,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217602229] [2022-07-21 07:46:38,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:46:38,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:46:38,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:46:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:46:38,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:46:38,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217602229] [2022-07-21 07:46:38,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217602229] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:46:38,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:46:38,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 07:46:38,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849571179] [2022-07-21 07:46:38,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:46:38,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 07:46:38,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:46:38,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 07:46:38,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 07:46:38,467 INFO L87 Difference]: Start difference. First operand 2938 states and 4546 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) [2022-07-21 07:46:38,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:46:38,626 INFO L93 Difference]: Finished difference Result 4340 states and 6595 transitions. [2022-07-21 07:46:38,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 07:46:38,627 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 [2022-07-21 07:46:38,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:46:38,634 INFO L225 Difference]: With dead ends: 4340 [2022-07-21 07:46:38,634 INFO L226 Difference]: Without dead ends: 2938 [2022-07-21 07:46:38,636 INFO L412 NwaCegarLoop]: 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 [2022-07-21 07:46:38,637 INFO L413 NwaCegarLoop]: 1503 mSDtfsCounter, 4595 mSDsluCounter, 1474 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4595 SdHoareTripleChecker+Valid, 2977 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:46:38,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4595 Valid, 2977 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:46:38,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2022-07-21 07:46:38,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2022-07-21 07:46:38,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2936 states have (on average 1.5401907356948228) internal successors, (4522), 2937 states have internal predecessors, (4522), 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) [2022-07-21 07:46:38,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4522 transitions. [2022-07-21 07:46:38,751 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4522 transitions. Word has length 55 [2022-07-21 07:46:38,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:46:38,751 INFO L495 AbstractCegarLoop]: Abstraction has 2938 states and 4522 transitions. [2022-07-21 07:46:38,752 INFO L496 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) [2022-07-21 07:46:38,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4522 transitions. [2022-07-21 07:46:38,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-21 07:46:38,752 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:46:38,752 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:46:38,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 07:46:38,753 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:46:38,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:46:38,753 INFO L85 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2022-07-21 07:46:38,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:46:38,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031926221] [2022-07-21 07:46:38,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:46:38,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:46:38,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:46:38,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:46:38,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:46:38,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031926221] [2022-07-21 07:46:38,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031926221] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:46:38,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:46:38,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 07:46:38,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086272867] [2022-07-21 07:46:38,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:46:38,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 07:46:38,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:46:38,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 07:46:38,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 07:46:38,792 INFO L87 Difference]: Start difference. First operand 2938 states and 4522 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) [2022-07-21 07:46:38,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:46:38,966 INFO L93 Difference]: Finished difference Result 4340 states and 6547 transitions. [2022-07-21 07:46:38,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 07:46:38,967 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 [2022-07-21 07:46:38,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:46:38,973 INFO L225 Difference]: With dead ends: 4340 [2022-07-21 07:46:38,973 INFO L226 Difference]: Without dead ends: 2938 [2022-07-21 07:46:38,975 INFO L412 NwaCegarLoop]: 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 [2022-07-21 07:46:38,975 INFO L413 NwaCegarLoop]: 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 [2022-07-21 07:46:38,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4627 Valid, 2982 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:46:38,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2022-07-21 07:46:39,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2022-07-21 07:46:39,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2936 states have (on average 1.5320163487738419) internal successors, (4498), 2937 states have internal predecessors, (4498), 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) [2022-07-21 07:46:39,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4498 transitions. [2022-07-21 07:46:39,136 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4498 transitions. Word has length 55 [2022-07-21 07:46:39,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:46:39,137 INFO L495 AbstractCegarLoop]: Abstraction has 2938 states and 4498 transitions. [2022-07-21 07:46:39,137 INFO L496 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) [2022-07-21 07:46:39,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4498 transitions. [2022-07-21 07:46:39,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-21 07:46:39,137 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:46:39,137 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:46:39,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 07:46:39,138 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:46:39,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:46:39,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2022-07-21 07:46:39,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:46:39,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628952540] [2022-07-21 07:46:39,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:46:39,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:46:39,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:46:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:46:39,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:46:39,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628952540] [2022-07-21 07:46:39,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628952540] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:46:39,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:46:39,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 07:46:39,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512719486] [2022-07-21 07:46:39,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:46:39,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 07:46:39,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:46:39,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 07:46:39,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 07:46:39,191 INFO L87 Difference]: Start difference. First operand 2938 states and 4498 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) [2022-07-21 07:46:39,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:46:39,455 INFO L93 Difference]: Finished difference Result 4169 states and 6196 transitions. [2022-07-21 07:46:39,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 07:46:39,456 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 [2022-07-21 07:46:39,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:46:39,462 INFO L225 Difference]: With dead ends: 4169 [2022-07-21 07:46:39,462 INFO L226 Difference]: Without dead ends: 4167 [2022-07-21 07:46:39,464 INFO L412 NwaCegarLoop]: 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 [2022-07-21 07:46:39,464 INFO L413 NwaCegarLoop]: 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 [2022-07-21 07:46:39,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 10530 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:46:39,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4167 states. [2022-07-21 07:46:39,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4167 to 3034. [2022-07-21 07:46:39,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3034 states, 3032 states have (on average 1.512532981530343) internal successors, (4586), 3033 states have internal predecessors, (4586), 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) [2022-07-21 07:46:39,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4586 transitions. [2022-07-21 07:46:39,595 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4586 transitions. Word has length 55 [2022-07-21 07:46:39,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:46:39,595 INFO L495 AbstractCegarLoop]: Abstraction has 3034 states and 4586 transitions. [2022-07-21 07:46:39,596 INFO L496 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) [2022-07-21 07:46:39,596 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4586 transitions. [2022-07-21 07:46:39,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 07:46:39,597 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:46:39,597 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:46:39,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 07:46:39,597 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:46:39,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:46:39,598 INFO L85 PathProgramCache]: Analyzing trace with hash -484645446, now seen corresponding path program 1 times [2022-07-21 07:46:39,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:46:39,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940702876] [2022-07-21 07:46:39,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:46:39,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:46:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:46:39,638 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 07:46:39,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:46:39,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940702876] [2022-07-21 07:46:39,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940702876] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:46:39,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:46:39,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 07:46:39,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431931161] [2022-07-21 07:46:39,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:46:39,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 07:46:39,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:46:39,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 07:46:39,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 07:46:39,640 INFO L87 Difference]: Start difference. First operand 3034 states and 4586 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) [2022-07-21 07:46:40,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:46:40,194 INFO L93 Difference]: Finished difference Result 9340 states and 13355 transitions. [2022-07-21 07:46:40,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 07:46:40,194 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 [2022-07-21 07:46:40,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:46:40,205 INFO L225 Difference]: With dead ends: 9340 [2022-07-21 07:46:40,205 INFO L226 Difference]: Without dead ends: 7842 [2022-07-21 07:46:40,207 INFO L412 NwaCegarLoop]: 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 [2022-07-21 07:46:40,208 INFO L413 NwaCegarLoop]: 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 [2022-07-21 07:46:40,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4751 Valid, 3330 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:46:40,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2022-07-21 07:46:40,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 4530. [2022-07-21 07:46:40,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4530 states, 4528 states have (on average 1.4686395759717314) internal successors, (6650), 4529 states have internal predecessors, (6650), 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) [2022-07-21 07:46:40,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4530 states to 4530 states and 6650 transitions. [2022-07-21 07:46:40,449 INFO L78 Accepts]: Start accepts. Automaton has 4530 states and 6650 transitions. Word has length 79 [2022-07-21 07:46:40,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:46:40,450 INFO L495 AbstractCegarLoop]: Abstraction has 4530 states and 6650 transitions. [2022-07-21 07:46:40,450 INFO L496 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) [2022-07-21 07:46:40,450 INFO L276 IsEmpty]: Start isEmpty. Operand 4530 states and 6650 transitions. [2022-07-21 07:46:40,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 07:46:40,451 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:46:40,452 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:46:40,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 07:46:40,452 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:46:40,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:46:40,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2041539034, now seen corresponding path program 1 times [2022-07-21 07:46:40,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:46:40,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986366535] [2022-07-21 07:46:40,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:46:40,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:46:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:46:40,495 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 07:46:40,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:46:40,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986366535] [2022-07-21 07:46:40,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986366535] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:46:40,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:46:40,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 07:46:40,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312294379] [2022-07-21 07:46:40,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:46:40,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 07:46:40,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:46:40,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 07:46:40,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 07:46:40,498 INFO L87 Difference]: Start difference. First operand 4530 states and 6650 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) [2022-07-21 07:46:41,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:46:41,119 INFO L93 Difference]: Finished difference Result 10836 states and 15419 transitions. [2022-07-21 07:46:41,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 07:46:41,120 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 [2022-07-21 07:46:41,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:46:41,133 INFO L225 Difference]: With dead ends: 10836 [2022-07-21 07:46:41,133 INFO L226 Difference]: Without dead ends: 9338 [2022-07-21 07:46:41,136 INFO L412 NwaCegarLoop]: 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 [2022-07-21 07:46:41,136 INFO L413 NwaCegarLoop]: 1592 mSDtfsCounter, 4708 mSDsluCounter, 1774 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4708 SdHoareTripleChecker+Valid, 3366 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 [2022-07-21 07:46:41,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4708 Valid, 3366 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:46:41,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9338 states. [2022-07-21 07:46:41,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9338 to 6778. [2022-07-21 07:46:41,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6778 states, 6776 states have (on average 1.4353600944510034) internal successors, (9726), 6777 states have internal predecessors, (9726), 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) [2022-07-21 07:46:41,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6778 states to 6778 states and 9726 transitions. [2022-07-21 07:46:41,541 INFO L78 Accepts]: Start accepts. Automaton has 6778 states and 9726 transitions. Word has length 79 [2022-07-21 07:46:41,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:46:41,542 INFO L495 AbstractCegarLoop]: Abstraction has 6778 states and 9726 transitions. [2022-07-21 07:46:41,542 INFO L496 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) [2022-07-21 07:46:41,542 INFO L276 IsEmpty]: Start isEmpty. Operand 6778 states and 9726 transitions. [2022-07-21 07:46:41,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 07:46:41,543 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:46:41,544 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:46:41,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 07:46:41,544 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:46:41,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:46:41,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1121788422, now seen corresponding path program 1 times [2022-07-21 07:46:41,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:46:41,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881219646] [2022-07-21 07:46:41,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:46:41,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:46:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:46:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 07:46:41,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:46:41,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881219646] [2022-07-21 07:46:41,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881219646] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:46:41,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:46:41,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 07:46:41,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433523603] [2022-07-21 07:46:41,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:46:41,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 07:46:41,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:46:41,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 07:46:41,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 07:46:41,587 INFO L87 Difference]: Start difference. First operand 6778 states and 9726 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) [2022-07-21 07:46:42,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:46:42,407 INFO L93 Difference]: Finished difference Result 12332 states and 17483 transitions. [2022-07-21 07:46:42,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 07:46:42,407 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 [2022-07-21 07:46:42,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:46:42,425 INFO L225 Difference]: With dead ends: 12332 [2022-07-21 07:46:42,425 INFO L226 Difference]: Without dead ends: 10834 [2022-07-21 07:46:42,429 INFO L412 NwaCegarLoop]: 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 [2022-07-21 07:46:42,430 INFO L413 NwaCegarLoop]: 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 [2022-07-21 07:46:42,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4740 Valid, 3382 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:46:42,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10834 states. [2022-07-21 07:46:43,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10834 to 8274. [2022-07-21 07:46:43,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8274 states, 8272 states have (on average 1.4252901353965184) internal successors, (11790), 8273 states have internal predecessors, (11790), 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) [2022-07-21 07:46:43,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8274 states to 8274 states and 11790 transitions. [2022-07-21 07:46:43,023 INFO L78 Accepts]: Start accepts. Automaton has 8274 states and 11790 transitions. Word has length 79 [2022-07-21 07:46:43,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:46:43,023 INFO L495 AbstractCegarLoop]: Abstraction has 8274 states and 11790 transitions. [2022-07-21 07:46:43,024 INFO L496 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) [2022-07-21 07:46:43,024 INFO L276 IsEmpty]: Start isEmpty. Operand 8274 states and 11790 transitions. [2022-07-21 07:46:43,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 07:46:43,025 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:46:43,026 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:46:43,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 07:46:43,026 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:46:43,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:46:43,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1937719834, now seen corresponding path program 1 times [2022-07-21 07:46:43,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:46:43,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846307967] [2022-07-21 07:46:43,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:46:43,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:46:43,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:46:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 07:46:43,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:46:43,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846307967] [2022-07-21 07:46:43,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846307967] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:46:43,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:46:43,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 07:46:43,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923830303] [2022-07-21 07:46:43,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:46:43,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 07:46:43,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:46:43,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 07:46:43,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 07:46:43,076 INFO L87 Difference]: Start difference. First operand 8274 states and 11790 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) [2022-07-21 07:46:43,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:46:43,871 INFO L93 Difference]: Finished difference Result 12948 states and 18347 transitions. [2022-07-21 07:46:43,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 07:46:43,871 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 [2022-07-21 07:46:43,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:46:43,888 INFO L225 Difference]: With dead ends: 12948 [2022-07-21 07:46:43,888 INFO L226 Difference]: Without dead ends: 11890 [2022-07-21 07:46:43,892 INFO L412 NwaCegarLoop]: 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 [2022-07-21 07:46:43,893 INFO L413 NwaCegarLoop]: 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 [2022-07-21 07:46:43,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4739 Valid, 3335 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:46:43,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11890 states. [2022-07-21 07:46:44,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11890 to 9330. [2022-07-21 07:46:44,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9330 states, 9328 states have (on average 1.4217409948542024) internal successors, (13262), 9329 states have internal predecessors, (13262), 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) [2022-07-21 07:46:44,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9330 states to 9330 states and 13262 transitions. [2022-07-21 07:46:44,561 INFO L78 Accepts]: Start accepts. Automaton has 9330 states and 13262 transitions. Word has length 79 [2022-07-21 07:46:44,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:46:44,561 INFO L495 AbstractCegarLoop]: Abstraction has 9330 states and 13262 transitions. [2022-07-21 07:46:44,561 INFO L496 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) [2022-07-21 07:46:44,561 INFO L276 IsEmpty]: Start isEmpty. Operand 9330 states and 13262 transitions. [2022-07-21 07:46:44,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-21 07:46:44,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:46:44,563 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:46:44,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 07:46:44,564 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:46:44,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:46:44,564 INFO L85 PathProgramCache]: Analyzing trace with hash -596667294, now seen corresponding path program 1 times [2022-07-21 07:46:44,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:46:44,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581945916] [2022-07-21 07:46:44,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:46:44,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:46:44,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:46:44,754 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:46:44,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:46:44,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581945916] [2022-07-21 07:46:44,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581945916] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 07:46:44,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698332591] [2022-07-21 07:46:44,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:46:44,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 07:46:44,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 07:46:44,756 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) [2022-07-21 07:46:44,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 07:46:44,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:46:44,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 07:46:44,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 07:46:45,104 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 07:46:45,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 07:46:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 07:46:45,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698332591] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 07:46:45,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 07:46:45,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2022-07-21 07:46:45,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123301920] [2022-07-21 07:46:45,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 07:46:45,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 07:46:45,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:46:45,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 07:46:45,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-07-21 07:46:45,241 INFO L87 Difference]: Start difference. First operand 9330 states and 13262 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) [2022-07-21 07:46:59,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:46:59,918 INFO L93 Difference]: Finished difference Result 116598 states and 160172 transitions. [2022-07-21 07:46:59,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-07-21 07:46:59,920 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 [2022-07-21 07:46:59,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:47:00,131 INFO L225 Difference]: With dead ends: 116598 [2022-07-21 07:47:00,132 INFO L226 Difference]: Without dead ends: 108804 [2022-07-21 07:47:00,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11156 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4231, Invalid=21209, Unknown=0, NotChecked=0, Total=25440 [2022-07-21 07:47:00,158 INFO L413 NwaCegarLoop]: 1657 mSDtfsCounter, 22879 mSDsluCounter, 5776 mSDsCounter, 0 mSdLazyCounter, 1815 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22879 SdHoareTripleChecker+Valid, 7433 SdHoareTripleChecker+Invalid, 2167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 1815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-21 07:47:00,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22879 Valid, 7433 Invalid, 2167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 1815 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-21 07:47:00,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108804 states. [2022-07-21 07:47:05,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108804 to 55658. [2022-07-21 07:47:05,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55658 states, 55656 states have (on average 1.3625844473192468) internal successors, (75836), 55657 states have internal predecessors, (75836), 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) [2022-07-21 07:47:06,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55658 states to 55658 states and 75836 transitions. [2022-07-21 07:47:06,079 INFO L78 Accepts]: Start accepts. Automaton has 55658 states and 75836 transitions. Word has length 80 [2022-07-21 07:47:06,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:47:06,079 INFO L495 AbstractCegarLoop]: Abstraction has 55658 states and 75836 transitions. [2022-07-21 07:47:06,079 INFO L496 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) [2022-07-21 07:47:06,079 INFO L276 IsEmpty]: Start isEmpty. Operand 55658 states and 75836 transitions. [2022-07-21 07:47:06,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-21 07:47:06,083 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:47:06,083 INFO L195 NwaCegarLoop]: 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] [2022-07-21 07:47:06,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 07:47:06,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 07:47:06,313 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:47:06,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:47:06,313 INFO L85 PathProgramCache]: Analyzing trace with hash 2064719954, now seen corresponding path program 1 times [2022-07-21 07:47:06,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:47:06,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749042836] [2022-07-21 07:47:06,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:47:06,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:47:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:47:06,496 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:47:06,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:47:06,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749042836] [2022-07-21 07:47:06,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749042836] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 07:47:06,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493291980] [2022-07-21 07:47:06,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:47:06,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 07:47:06,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 07:47:06,503 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) [2022-07-21 07:47:06,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 07:47:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:47:06,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 07:47:06,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 07:47:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:47:06,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 07:47:07,265 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:47:07,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493291980] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 07:47:07,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 07:47:07,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2022-07-21 07:47:07,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131027072] [2022-07-21 07:47:07,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 07:47:07,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 07:47:07,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:47:07,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 07:47:07,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-07-21 07:47:07,268 INFO L87 Difference]: Start difference. First operand 55658 states and 75836 transitions. Second operand has 28 states, 28 states have (on average 7.178571428571429) internal successors, (201), 27 states have internal predecessors, (201), 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)