/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf -i ../../../trunk/examples/svcomp/seq-mthreaded/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 18:39:33,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 18:39:33,771 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 18:39:33,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 18:39:33,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 18:39:33,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 18:39:33,818 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 18:39:33,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 18:39:33,822 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 18:39:33,823 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 18:39:33,823 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 18:39:33,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 18:39:33,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 18:39:33,825 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 18:39:33,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 18:39:33,826 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 18:39:33,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 18:39:33,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 18:39:33,828 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 18:39:33,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 18:39:33,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 18:39:33,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 18:39:33,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 18:39:33,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 18:39:33,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 18:39:33,841 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 18:39:33,841 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 18:39:33,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 18:39:33,842 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 18:39:33,843 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 18:39:33,843 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 18:39:33,843 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 18:39:33,843 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 18:39:33,844 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 18:39:33,844 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 18:39:33,845 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 18:39:33,852 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 18:39:33,875 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 18:39:33,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 18:39:33,875 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 18:39:33,875 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 18:39:33,876 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 18:39:33,876 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 18:39:33,876 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 18:39:33,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 18:39:33,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 18:39:33,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 18:39:33,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 18:39:33,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 18:39:33,877 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 18:39:33,877 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 18:39:33,877 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 18:39:33,877 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 18:39:33,877 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 18:39:33,877 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 18:39:33,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 18:39:33,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 18:39:33,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 18:39:33,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:39:33,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 18:39:33,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 18:39:33,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 18:39:33,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 18:39:33,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 18:39:33,878 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 18:39:33,878 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 18:39:33,878 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 18:39:33,878 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 18:39:33,878 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 18:39:33,879 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 18:39:33,879 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 18:39:34,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 18:39:34,069 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 18:39:34,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 18:39:34,071 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 18:39:34,072 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 18:39:34,072 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c [2022-01-10 18:39:34,121 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f34a0583/be0adb7fceba4fa8ae9f4150f26464a2/FLAGf38ba1591 [2022-01-10 18:39:34,510 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 18:39:34,510 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c [2022-01-10 18:39:34,529 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f34a0583/be0adb7fceba4fa8ae9f4150f26464a2/FLAGf38ba1591 [2022-01-10 18:39:34,540 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f34a0583/be0adb7fceba4fa8ae9f4150f26464a2 [2022-01-10 18:39:34,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 18:39:34,544 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 18:39:34,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 18:39:34,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 18:39:34,548 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 18:39:34,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:39:34" (1/1) ... [2022-01-10 18:39:34,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51daa611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:34, skipping insertion in model container [2022-01-10 18:39:34,549 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:39:34" (1/1) ... [2022-01-10 18:39:34,553 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 18:39:34,585 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 18:39:34,741 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c[14373,14386] [2022-01-10 18:39:34,743 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:39:34,750 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 18:39:34,785 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c[14373,14386] [2022-01-10 18:39:34,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:39:34,795 INFO L208 MainTranslator]: Completed translation [2022-01-10 18:39:34,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:34 WrapperNode [2022-01-10 18:39:34,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 18:39:34,797 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 18:39:34,797 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 18:39:34,797 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 18:39:34,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:34" (1/1) ... [2022-01-10 18:39:34,809 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:34" (1/1) ... [2022-01-10 18:39:34,832 INFO L137 Inliner]: procedures = 22, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 459 [2022-01-10 18:39:34,832 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 18:39:34,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 18:39:34,833 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 18:39:34,833 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 18:39:34,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:34" (1/1) ... [2022-01-10 18:39:34,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:34" (1/1) ... [2022-01-10 18:39:34,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:34" (1/1) ... [2022-01-10 18:39:34,842 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:34" (1/1) ... [2022-01-10 18:39:34,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:34" (1/1) ... [2022-01-10 18:39:34,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:34" (1/1) ... [2022-01-10 18:39:34,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:34" (1/1) ... [2022-01-10 18:39:34,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 18:39:34,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 18:39:34,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 18:39:34,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 18:39:34,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:34" (1/1) ... [2022-01-10 18:39:34,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:39:34,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:39:34,889 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) [2022-01-10 18:39:34,894 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 [2022-01-10 18:39:34,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 18:39:34,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 18:39:34,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 18:39:34,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 18:39:34,996 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 18:39:34,997 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 18:39:35,354 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 18:39:35,360 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 18:39:35,360 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 18:39:35,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:39:35 BoogieIcfgContainer [2022-01-10 18:39:35,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 18:39:35,362 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 18:39:35,362 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 18:39:35,366 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 18:39:35,368 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:39:35" (1/1) ... [2022-01-10 18:39:35,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:39:35 BasicIcfg [2022-01-10 18:39:35,680 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 18:39:35,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 18:39:35,682 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 18:39:35,684 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 18:39:35,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:39:34" (1/4) ... [2022-01-10 18:39:35,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37bec836 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:39:35, skipping insertion in model container [2022-01-10 18:39:35,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:34" (2/4) ... [2022-01-10 18:39:35,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37bec836 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:39:35, skipping insertion in model container [2022-01-10 18:39:35,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:39:35" (3/4) ... [2022-01-10 18:39:35,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37bec836 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 06:39:35, skipping insertion in model container [2022-01-10 18:39:35,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:39:35" (4/4) ... [2022-01-10 18:39:35,688 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.cTransformedIcfg [2022-01-10 18:39:35,694 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 18:39:35,694 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 18:39:35,739 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 18:39:35,745 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 18:39:35,745 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 18:39:35,757 INFO L276 IsEmpty]: Start isEmpty. Operand has 143 states, 141 states have (on average 1.7588652482269505) internal successors, (248), 142 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:39:35,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 18:39:35,764 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:39:35,765 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:39:35,765 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:39:35,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:39:35,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1568228201, now seen corresponding path program 1 times [2022-01-10 18:39:35,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:39:35,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863795337] [2022-01-10 18:39:35,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:39:35,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:39:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:39:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:39:36,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:39:36,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863795337] [2022-01-10 18:39:36,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863795337] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:39:36,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:39:36,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 18:39:36,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662830532] [2022-01-10 18:39:36,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:39:36,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 18:39:36,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:39:36,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 18:39:36,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 18:39:36,076 INFO L87 Difference]: Start difference. First operand has 143 states, 141 states have (on average 1.7588652482269505) internal successors, (248), 142 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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) [2022-01-10 18:39:36,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:39:36,107 INFO L93 Difference]: Finished difference Result 227 states and 388 transitions. [2022-01-10 18:39:36,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 18:39:36,109 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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 37 [2022-01-10 18:39:36,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:39:36,118 INFO L225 Difference]: With dead ends: 227 [2022-01-10 18:39:36,118 INFO L226 Difference]: Without dead ends: 139 [2022-01-10 18:39:36,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 18:39:36,125 INFO L933 BasicCegarLoop]: 245 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, 245 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 [2022-01-10 18:39:36,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:39:36,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-10 18:39:36,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-01-10 18:39:36,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.7463768115942029) internal successors, (241), 138 states have internal predecessors, (241), 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) [2022-01-10 18:39:36,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 241 transitions. [2022-01-10 18:39:36,158 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 241 transitions. Word has length 37 [2022-01-10 18:39:36,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:39:36,159 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 241 transitions. [2022-01-10 18:39:36,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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) [2022-01-10 18:39:36,161 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 241 transitions. [2022-01-10 18:39:36,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 18:39:36,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:39:36,166 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:39:36,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 18:39:36,167 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:39:36,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:39:36,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1159403976, now seen corresponding path program 1 times [2022-01-10 18:39:36,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:39:36,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057815378] [2022-01-10 18:39:36,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:39:36,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:39:36,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:39:36,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:39:36,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:39:36,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057815378] [2022-01-10 18:39:36,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057815378] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:39:36,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:39:36,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:39:36,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691153426] [2022-01-10 18:39:36,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:39:36,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:39:36,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:39:36,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:39:36,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:39:36,338 INFO L87 Difference]: Start difference. First operand 139 states and 241 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2022-01-10 18:39:36,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:39:36,401 INFO L93 Difference]: Finished difference Result 222 states and 378 transitions. [2022-01-10 18:39:36,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:39:36,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 37 [2022-01-10 18:39:36,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:39:36,403 INFO L225 Difference]: With dead ends: 222 [2022-01-10 18:39:36,403 INFO L226 Difference]: Without dead ends: 139 [2022-01-10 18:39:36,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 18:39:36,404 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 3 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:39:36,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 923 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:39:36,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-10 18:39:36,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-01-10 18:39:36,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.5289855072463767) internal successors, (211), 138 states have internal predecessors, (211), 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) [2022-01-10 18:39:36,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 211 transitions. [2022-01-10 18:39:36,424 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 211 transitions. Word has length 37 [2022-01-10 18:39:36,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:39:36,425 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 211 transitions. [2022-01-10 18:39:36,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2022-01-10 18:39:36,425 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 211 transitions. [2022-01-10 18:39:36,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 18:39:36,426 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:39:36,426 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:39:36,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 18:39:36,426 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:39:36,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:39:36,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1832970799, now seen corresponding path program 1 times [2022-01-10 18:39:36,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:39:36,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483817995] [2022-01-10 18:39:36,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:39:36,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:39:36,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:39:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:39:36,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:39:36,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483817995] [2022-01-10 18:39:36,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483817995] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:39:36,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:39:36,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:39:36,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067961402] [2022-01-10 18:39:36,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:39:36,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:39:36,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:39:36,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:39:36,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:39:36,648 INFO L87 Difference]: Start difference. First operand 139 states and 211 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2022-01-10 18:39:38,678 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:39:40,817 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:39:40,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:39:40,984 INFO L93 Difference]: Finished difference Result 287 states and 459 transitions. [2022-01-10 18:39:40,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:39:40,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2022-01-10 18:39:40,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:39:40,986 INFO L225 Difference]: With dead ends: 287 [2022-01-10 18:39:40,986 INFO L226 Difference]: Without dead ends: 208 [2022-01-10 18:39:40,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:39:40,987 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 107 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-01-10 18:39:40,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 378 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-01-10 18:39:40,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-10 18:39:40,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 206. [2022-01-10 18:39:40,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.5609756097560976) internal successors, (320), 205 states have internal predecessors, (320), 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) [2022-01-10 18:39:40,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 320 transitions. [2022-01-10 18:39:40,998 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 320 transitions. Word has length 66 [2022-01-10 18:39:40,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:39:40,998 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 320 transitions. [2022-01-10 18:39:40,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2022-01-10 18:39:40,998 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 320 transitions. [2022-01-10 18:39:40,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 18:39:41,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:39:41,000 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:39:41,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 18:39:41,000 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:39:41,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:39:41,000 INFO L85 PathProgramCache]: Analyzing trace with hash -534973050, now seen corresponding path program 1 times [2022-01-10 18:39:41,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:39:41,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237938193] [2022-01-10 18:39:41,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:39:41,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:39:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:39:41,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:39:41,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:39:41,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237938193] [2022-01-10 18:39:41,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237938193] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:39:41,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:39:41,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 18:39:41,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560687229] [2022-01-10 18:39:41,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:39:41,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 18:39:41,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:39:41,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 18:39:41,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 18:39:41,145 INFO L87 Difference]: Start difference. First operand 206 states and 320 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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) [2022-01-10 18:39:41,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:39:41,206 INFO L93 Difference]: Finished difference Result 579 states and 893 transitions. [2022-01-10 18:39:41,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 18:39:41,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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 68 [2022-01-10 18:39:41,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:39:41,211 INFO L225 Difference]: With dead ends: 579 [2022-01-10 18:39:41,211 INFO L226 Difference]: Without dead ends: 398 [2022-01-10 18:39:41,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:39:41,218 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 542 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:39:41,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 401 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:39:41,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-01-10 18:39:41,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 396. [2022-01-10 18:39:41,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 1.5443037974683544) internal successors, (610), 395 states have internal predecessors, (610), 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) [2022-01-10 18:39:41,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 610 transitions. [2022-01-10 18:39:41,256 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 610 transitions. Word has length 68 [2022-01-10 18:39:41,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:39:41,256 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 610 transitions. [2022-01-10 18:39:41,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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) [2022-01-10 18:39:41,257 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 610 transitions. [2022-01-10 18:39:41,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 18:39:41,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:39:41,258 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:39:41,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 18:39:41,258 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:39:41,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:39:41,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1845891030, now seen corresponding path program 1 times [2022-01-10 18:39:41,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:39:41,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4439081] [2022-01-10 18:39:41,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:39:41,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:39:41,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:39:41,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:39:41,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:39:41,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4439081] [2022-01-10 18:39:41,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4439081] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:39:41,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:39:41,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:39:41,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124436637] [2022-01-10 18:39:41,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:39:41,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:39:41,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:39:41,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:39:41,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:39:41,360 INFO L87 Difference]: Start difference. First operand 396 states and 610 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2022-01-10 18:39:41,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:39:41,388 INFO L93 Difference]: Finished difference Result 671 states and 1072 transitions. [2022-01-10 18:39:41,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:39:41,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 69 [2022-01-10 18:39:41,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:39:41,391 INFO L225 Difference]: With dead ends: 671 [2022-01-10 18:39:41,391 INFO L226 Difference]: Without dead ends: 519 [2022-01-10 18:39:41,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:39:41,393 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 116 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 480 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 [2022-01-10 18:39:41,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 480 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:39:41,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-01-10 18:39:41,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 517. [2022-01-10 18:39:41,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.571705426356589) internal successors, (811), 516 states have internal predecessors, (811), 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) [2022-01-10 18:39:41,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 811 transitions. [2022-01-10 18:39:41,418 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 811 transitions. Word has length 69 [2022-01-10 18:39:41,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:39:41,421 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 811 transitions. [2022-01-10 18:39:41,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2022-01-10 18:39:41,425 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 811 transitions. [2022-01-10 18:39:41,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 18:39:41,426 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:39:41,426 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:39:41,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 18:39:41,426 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:39:41,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:39:41,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1525756003, now seen corresponding path program 1 times [2022-01-10 18:39:41,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:39:41,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703650067] [2022-01-10 18:39:41,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:39:41,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:39:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:39:41,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:39:41,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:39:41,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703650067] [2022-01-10 18:39:41,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703650067] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:39:41,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:39:41,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:39:41,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046651807] [2022-01-10 18:39:41,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:39:41,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:39:41,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:39:41,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:39:41,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:39:41,498 INFO L87 Difference]: Start difference. First operand 517 states and 811 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2022-01-10 18:39:41,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:39:41,528 INFO L93 Difference]: Finished difference Result 1056 states and 1710 transitions. [2022-01-10 18:39:41,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:39:41,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 69 [2022-01-10 18:39:41,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:39:41,531 INFO L225 Difference]: With dead ends: 1056 [2022-01-10 18:39:41,531 INFO L226 Difference]: Without dead ends: 657 [2022-01-10 18:39:41,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:39:41,532 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 121 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:39:41,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 409 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:39:41,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-01-10 18:39:41,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 645. [2022-01-10 18:39:41,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 1.5885093167701863) internal successors, (1023), 644 states have internal predecessors, (1023), 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) [2022-01-10 18:39:41,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1023 transitions. [2022-01-10 18:39:41,551 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1023 transitions. Word has length 69 [2022-01-10 18:39:41,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:39:41,551 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1023 transitions. [2022-01-10 18:39:41,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2022-01-10 18:39:41,552 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1023 transitions. [2022-01-10 18:39:41,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 18:39:41,552 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:39:41,553 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:39:41,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 18:39:41,553 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:39:41,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:39:41,553 INFO L85 PathProgramCache]: Analyzing trace with hash 2098637987, now seen corresponding path program 1 times [2022-01-10 18:39:41,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:39:41,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891797934] [2022-01-10 18:39:41,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:39:41,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:39:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:39:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:39:41,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:39:41,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891797934] [2022-01-10 18:39:41,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891797934] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:39:41,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:39:41,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:39:41,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199132739] [2022-01-10 18:39:41,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:39:41,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:39:41,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:39:41,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:39:41,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:39:41,643 INFO L87 Difference]: Start difference. First operand 645 states and 1023 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2022-01-10 18:39:41,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:39:41,675 INFO L93 Difference]: Finished difference Result 1897 states and 3005 transitions. [2022-01-10 18:39:41,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:39:41,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 69 [2022-01-10 18:39:41,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:39:41,680 INFO L225 Difference]: With dead ends: 1897 [2022-01-10 18:39:41,680 INFO L226 Difference]: Without dead ends: 1280 [2022-01-10 18:39:41,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:39:41,682 INFO L933 BasicCegarLoop]: 408 mSDtfsCounter, 200 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:39:41,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 610 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:39:41,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2022-01-10 18:39:41,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 647. [2022-01-10 18:39:41,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 1.5866873065015479) internal successors, (1025), 646 states have internal predecessors, (1025), 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) [2022-01-10 18:39:41,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1025 transitions. [2022-01-10 18:39:41,703 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1025 transitions. Word has length 69 [2022-01-10 18:39:41,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:39:41,703 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 1025 transitions. [2022-01-10 18:39:41,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2022-01-10 18:39:41,703 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1025 transitions. [2022-01-10 18:39:41,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-10 18:39:41,704 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:39:41,704 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:39:41,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 18:39:41,704 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:39:41,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:39:41,704 INFO L85 PathProgramCache]: Analyzing trace with hash 106920449, now seen corresponding path program 1 times [2022-01-10 18:39:41,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:39:41,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874043600] [2022-01-10 18:39:41,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:39:41,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:39:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:39:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:39:41,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:39:41,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874043600] [2022-01-10 18:39:41,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874043600] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:39:41,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:39:41,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:39:41,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406340633] [2022-01-10 18:39:41,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:39:41,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:39:41,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:39:41,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:39:41,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:39:41,800 INFO L87 Difference]: Start difference. First operand 647 states and 1025 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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) [2022-01-10 18:39:41,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:39:41,869 INFO L93 Difference]: Finished difference Result 1832 states and 2895 transitions. [2022-01-10 18:39:41,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 18:39:41,870 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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 70 [2022-01-10 18:39:41,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:39:41,874 INFO L225 Difference]: With dead ends: 1832 [2022-01-10 18:39:41,874 INFO L226 Difference]: Without dead ends: 1197 [2022-01-10 18:39:41,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:39:41,875 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 537 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:39:41,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 505 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:39:41,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2022-01-10 18:39:41,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 1195. [2022-01-10 18:39:41,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1194 states have (on average 1.5661641541038527) internal successors, (1870), 1194 states have internal predecessors, (1870), 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) [2022-01-10 18:39:41,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 1870 transitions. [2022-01-10 18:39:41,921 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 1870 transitions. Word has length 70 [2022-01-10 18:39:41,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:39:41,922 INFO L470 AbstractCegarLoop]: Abstraction has 1195 states and 1870 transitions. [2022-01-10 18:39:41,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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) [2022-01-10 18:39:41,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 1870 transitions. [2022-01-10 18:39:41,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-10 18:39:41,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:39:41,926 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:39:41,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 18:39:41,927 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:39:41,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:39:41,927 INFO L85 PathProgramCache]: Analyzing trace with hash -59292571, now seen corresponding path program 1 times [2022-01-10 18:39:41,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:39:41,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061956493] [2022-01-10 18:39:41,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:39:41,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:39:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:39:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:39:41,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:39:41,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061956493] [2022-01-10 18:39:41,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061956493] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:39:41,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:39:41,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 18:39:41,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158440880] [2022-01-10 18:39:41,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:39:41,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 18:39:41,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:39:41,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 18:39:41,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 18:39:41,989 INFO L87 Difference]: Start difference. First operand 1195 states and 1870 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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) [2022-01-10 18:39:42,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:39:42,049 INFO L93 Difference]: Finished difference Result 2133 states and 3336 transitions. [2022-01-10 18:39:42,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 18:39:42,049 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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 70 [2022-01-10 18:39:42,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:39:42,052 INFO L225 Difference]: With dead ends: 2133 [2022-01-10 18:39:42,052 INFO L226 Difference]: Without dead ends: 954 [2022-01-10 18:39:42,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:39:42,055 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 69 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:39:42,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 668 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:39:42,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-01-10 18:39:42,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 954. [2022-01-10 18:39:42,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 1.5634837355718783) internal successors, (1490), 953 states have internal predecessors, (1490), 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) [2022-01-10 18:39:42,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1490 transitions. [2022-01-10 18:39:42,086 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1490 transitions. Word has length 70 [2022-01-10 18:39:42,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:39:42,086 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 1490 transitions. [2022-01-10 18:39:42,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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) [2022-01-10 18:39:42,086 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1490 transitions. [2022-01-10 18:39:42,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-10 18:39:42,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:39:42,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:39:42,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 18:39:42,087 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:39:42,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:39:42,087 INFO L85 PathProgramCache]: Analyzing trace with hash 460531217, now seen corresponding path program 1 times [2022-01-10 18:39:42,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:39:42,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430138269] [2022-01-10 18:39:42,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:39:42,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:39:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:39:42,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:39:42,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:39:42,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430138269] [2022-01-10 18:39:42,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430138269] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:39:42,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:39:42,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:39:42,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025458383] [2022-01-10 18:39:42,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:39:42,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:39:42,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:39:42,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:39:42,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:39:42,130 INFO L87 Difference]: Start difference. First operand 954 states and 1490 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2022-01-10 18:39:42,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:39:42,163 INFO L93 Difference]: Finished difference Result 1886 states and 2937 transitions. [2022-01-10 18:39:42,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:39:42,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 72 [2022-01-10 18:39:42,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:39:42,167 INFO L225 Difference]: With dead ends: 1886 [2022-01-10 18:39:42,167 INFO L226 Difference]: Without dead ends: 1261 [2022-01-10 18:39:42,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:39:42,168 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 197 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:39:42,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 421 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:39:42,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2022-01-10 18:39:42,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 954. [2022-01-10 18:39:42,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 1.5624344176285414) internal successors, (1489), 953 states have internal predecessors, (1489), 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) [2022-01-10 18:39:42,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1489 transitions. [2022-01-10 18:39:42,202 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1489 transitions. Word has length 72 [2022-01-10 18:39:42,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:39:42,202 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 1489 transitions. [2022-01-10 18:39:42,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2022-01-10 18:39:42,202 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1489 transitions. [2022-01-10 18:39:42,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-10 18:39:42,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:39:42,203 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:39:42,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 18:39:42,203 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:39:42,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:39:42,204 INFO L85 PathProgramCache]: Analyzing trace with hash 497562866, now seen corresponding path program 1 times [2022-01-10 18:39:42,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:39:42,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105252197] [2022-01-10 18:39:42,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:39:42,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:39:42,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:39:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:39:42,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:39:42,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105252197] [2022-01-10 18:39:42,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105252197] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:39:42,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:39:42,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:39:42,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255852390] [2022-01-10 18:39:42,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:39:42,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:39:42,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:39:42,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:39:42,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:39:42,362 INFO L87 Difference]: Start difference. First operand 954 states and 1489 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2022-01-10 18:39:44,380 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:39:44,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:39:44,604 INFO L93 Difference]: Finished difference Result 2430 states and 3905 transitions. [2022-01-10 18:39:44,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:39:44,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 73 [2022-01-10 18:39:44,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:39:44,609 INFO L225 Difference]: With dead ends: 2430 [2022-01-10 18:39:44,609 INFO L226 Difference]: Without dead ends: 1646 [2022-01-10 18:39:44,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:39:44,612 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 106 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-10 18:39:44,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 391 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-01-10 18:39:44,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2022-01-10 18:39:44,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1644. [2022-01-10 18:39:44,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1643 states have (on average 1.5873402312842362) internal successors, (2608), 1643 states have internal predecessors, (2608), 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) [2022-01-10 18:39:44,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 2608 transitions. [2022-01-10 18:39:44,686 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 2608 transitions. Word has length 73 [2022-01-10 18:39:44,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:39:44,686 INFO L470 AbstractCegarLoop]: Abstraction has 1644 states and 2608 transitions. [2022-01-10 18:39:44,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2022-01-10 18:39:44,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 2608 transitions. [2022-01-10 18:39:44,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-10 18:39:44,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:39:44,688 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:39:44,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 18:39:44,688 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:39:44,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:39:44,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1175527607, now seen corresponding path program 1 times [2022-01-10 18:39:44,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:39:44,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372852724] [2022-01-10 18:39:44,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:39:44,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:39:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:39:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:39:44,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:39:44,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372852724] [2022-01-10 18:39:44,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372852724] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:39:44,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:39:44,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 18:39:44,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373667007] [2022-01-10 18:39:44,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:39:44,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 18:39:44,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:39:44,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 18:39:44,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 18:39:44,784 INFO L87 Difference]: Start difference. First operand 1644 states and 2608 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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) [2022-01-10 18:39:44,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:39:44,962 INFO L93 Difference]: Finished difference Result 4781 states and 7578 transitions. [2022-01-10 18:39:44,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 18:39:44,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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 75 [2022-01-10 18:39:44,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:39:44,971 INFO L225 Difference]: With dead ends: 4781 [2022-01-10 18:39:44,971 INFO L226 Difference]: Without dead ends: 3184 [2022-01-10 18:39:44,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:39:44,975 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 500 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:39:44,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 395 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:39:44,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2022-01-10 18:39:45,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 3182. [2022-01-10 18:39:45,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3182 states, 3181 states have (on average 1.575290789060044) internal successors, (5011), 3181 states have internal predecessors, (5011), 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) [2022-01-10 18:39:45,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3182 states to 3182 states and 5011 transitions. [2022-01-10 18:39:45,109 INFO L78 Accepts]: Start accepts. Automaton has 3182 states and 5011 transitions. Word has length 75 [2022-01-10 18:39:45,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:39:45,109 INFO L470 AbstractCegarLoop]: Abstraction has 3182 states and 5011 transitions. [2022-01-10 18:39:45,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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) [2022-01-10 18:39:45,109 INFO L276 IsEmpty]: Start isEmpty. Operand 3182 states and 5011 transitions. [2022-01-10 18:39:45,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 18:39:45,111 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:39:45,111 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:39:45,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 18:39:45,111 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:39:45,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:39:45,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1983048574, now seen corresponding path program 1 times [2022-01-10 18:39:45,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:39:45,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345914535] [2022-01-10 18:39:45,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:39:45,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:39:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:39:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:39:45,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:39:45,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345914535] [2022-01-10 18:39:45,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345914535] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:39:45,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:39:45,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:39:45,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087309168] [2022-01-10 18:39:45,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:39:45,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:39:45,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:39:45,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:39:45,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:39:45,174 INFO L87 Difference]: Start difference. First operand 3182 states and 5011 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 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) [2022-01-10 18:39:45,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:39:45,345 INFO L93 Difference]: Finished difference Result 7433 states and 11912 transitions. [2022-01-10 18:39:45,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:39:45,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 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 76 [2022-01-10 18:39:45,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:39:45,358 INFO L225 Difference]: With dead ends: 7433 [2022-01-10 18:39:45,358 INFO L226 Difference]: Without dead ends: 4565 [2022-01-10 18:39:45,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:39:45,363 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 112 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:39:45,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 407 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:39:45,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4565 states. [2022-01-10 18:39:45,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4565 to 4451. [2022-01-10 18:39:45,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4451 states, 4450 states have (on average 1.5757303370786517) internal successors, (7012), 4450 states have internal predecessors, (7012), 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) [2022-01-10 18:39:45,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4451 states to 4451 states and 7012 transitions. [2022-01-10 18:39:45,542 INFO L78 Accepts]: Start accepts. Automaton has 4451 states and 7012 transitions. Word has length 76 [2022-01-10 18:39:45,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:39:45,543 INFO L470 AbstractCegarLoop]: Abstraction has 4451 states and 7012 transitions. [2022-01-10 18:39:45,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 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) [2022-01-10 18:39:45,543 INFO L276 IsEmpty]: Start isEmpty. Operand 4451 states and 7012 transitions. [2022-01-10 18:39:45,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 18:39:45,544 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:39:45,544 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:39:45,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 18:39:45,545 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:39:45,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:39:45,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1327053852, now seen corresponding path program 1 times [2022-01-10 18:39:45,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:39:45,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755991552] [2022-01-10 18:39:45,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:39:45,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:39:45,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:39:45,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:39:45,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:39:45,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755991552] [2022-01-10 18:39:45,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755991552] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:39:45,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:39:45,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 18:39:45,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594481560] [2022-01-10 18:39:45,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:39:45,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 18:39:45,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:39:45,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 18:39:45,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 18:39:45,610 INFO L87 Difference]: Start difference. First operand 4451 states and 7012 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 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) [2022-01-10 18:39:45,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:39:45,923 INFO L93 Difference]: Finished difference Result 12120 states and 19204 transitions. [2022-01-10 18:39:45,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 18:39:45,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 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 76 [2022-01-10 18:39:45,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:39:45,958 INFO L225 Difference]: With dead ends: 12120 [2022-01-10 18:39:45,958 INFO L226 Difference]: Without dead ends: 7843 [2022-01-10 18:39:45,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 18:39:45,964 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 376 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:39:45,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 549 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:39:45,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7843 states. [2022-01-10 18:39:46,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7843 to 7841. [2022-01-10 18:39:46,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7841 states, 7840 states have (on average 1.563137755102041) internal successors, (12255), 7840 states have internal predecessors, (12255), 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) [2022-01-10 18:39:46,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7841 states to 7841 states and 12255 transitions. [2022-01-10 18:39:46,293 INFO L78 Accepts]: Start accepts. Automaton has 7841 states and 12255 transitions. Word has length 76 [2022-01-10 18:39:46,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:39:46,293 INFO L470 AbstractCegarLoop]: Abstraction has 7841 states and 12255 transitions. [2022-01-10 18:39:46,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 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) [2022-01-10 18:39:46,293 INFO L276 IsEmpty]: Start isEmpty. Operand 7841 states and 12255 transitions. [2022-01-10 18:39:46,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 18:39:46,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:39:46,295 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:39:46,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-10 18:39:46,295 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:39:46,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:39:46,296 INFO L85 PathProgramCache]: Analyzing trace with hash -372824957, now seen corresponding path program 1 times [2022-01-10 18:39:46,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:39:46,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985958337] [2022-01-10 18:39:46,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:39:46,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:39:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:39:46,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:39:46,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:39:46,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985958337] [2022-01-10 18:39:46,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985958337] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:39:46,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:39:46,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:39:46,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899218773] [2022-01-10 18:39:46,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:39:46,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:39:46,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:39:46,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:39:46,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:39:46,329 INFO L87 Difference]: Start difference. First operand 7841 states and 12255 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 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) [2022-01-10 18:39:46,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:39:46,859 INFO L93 Difference]: Finished difference Result 23233 states and 36400 transitions. [2022-01-10 18:39:46,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:39:46,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 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 76 [2022-01-10 18:39:46,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:39:46,886 INFO L225 Difference]: With dead ends: 23233 [2022-01-10 18:39:46,886 INFO L226 Difference]: Without dead ends: 15546 [2022-01-10 18:39:46,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:39:46,895 INFO L933 BasicCegarLoop]: 391 mSDtfsCounter, 186 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:39:46,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 590 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:39:46,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15546 states. [2022-01-10 18:39:47,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15546 to 7847. [2022-01-10 18:39:47,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7847 states, 7846 states have (on average 1.562707111904155) internal successors, (12261), 7846 states have internal predecessors, (12261), 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) [2022-01-10 18:39:47,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7847 states to 7847 states and 12261 transitions. [2022-01-10 18:39:47,280 INFO L78 Accepts]: Start accepts. Automaton has 7847 states and 12261 transitions. Word has length 76 [2022-01-10 18:39:47,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:39:47,280 INFO L470 AbstractCegarLoop]: Abstraction has 7847 states and 12261 transitions. [2022-01-10 18:39:47,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 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) [2022-01-10 18:39:47,281 INFO L276 IsEmpty]: Start isEmpty. Operand 7847 states and 12261 transitions. [2022-01-10 18:39:47,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 18:39:47,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:39:47,283 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:39:47,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-10 18:39:47,283 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:39:47,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:39:47,283 INFO L85 PathProgramCache]: Analyzing trace with hash -970000305, now seen corresponding path program 1 times [2022-01-10 18:39:47,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:39:47,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855156961] [2022-01-10 18:39:47,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:39:47,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:39:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:39:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:39:47,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:39:47,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855156961] [2022-01-10 18:39:47,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855156961] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:39:47,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:39:47,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:39:47,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770486548] [2022-01-10 18:39:47,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:39:47,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:39:47,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:39:47,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:39:47,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:39:47,342 INFO L87 Difference]: Start difference. First operand 7847 states and 12261 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 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) [2022-01-10 18:39:47,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:39:47,723 INFO L93 Difference]: Finished difference Result 15032 states and 23726 transitions. [2022-01-10 18:39:47,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:39:47,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 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 76 [2022-01-10 18:39:47,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:39:47,743 INFO L225 Difference]: With dead ends: 15032 [2022-01-10 18:39:47,743 INFO L226 Difference]: Without dead ends: 10189 [2022-01-10 18:39:47,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:39:47,752 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 107 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 467 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 [2022-01-10 18:39:47,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 467 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:39:47,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10189 states. [2022-01-10 18:39:48,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10189 to 10187. [2022-01-10 18:39:48,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10187 states, 10186 states have (on average 1.5647948164146868) internal successors, (15939), 10186 states have internal predecessors, (15939), 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) [2022-01-10 18:39:48,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10187 states to 10187 states and 15939 transitions. [2022-01-10 18:39:48,200 INFO L78 Accepts]: Start accepts. Automaton has 10187 states and 15939 transitions. Word has length 76 [2022-01-10 18:39:48,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:39:48,201 INFO L470 AbstractCegarLoop]: Abstraction has 10187 states and 15939 transitions. [2022-01-10 18:39:48,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 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) [2022-01-10 18:39:48,201 INFO L276 IsEmpty]: Start isEmpty. Operand 10187 states and 15939 transitions. [2022-01-10 18:39:48,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 18:39:48,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:39:48,203 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:39:48,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-10 18:39:48,203 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:39:48,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:39:48,204 INFO L85 PathProgramCache]: Analyzing trace with hash -696278929, now seen corresponding path program 1 times [2022-01-10 18:39:48,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:39:48,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364927710] [2022-01-10 18:39:48,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:39:48,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:39:48,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:39:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:39:48,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:39:48,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364927710] [2022-01-10 18:39:48,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364927710] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:39:48,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:39:48,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 18:39:48,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121714639] [2022-01-10 18:39:48,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:39:48,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 18:39:48,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:39:48,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 18:39:48,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 18:39:48,271 INFO L87 Difference]: Start difference. First operand 10187 states and 15939 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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) [2022-01-10 18:39:48,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:39:48,889 INFO L93 Difference]: Finished difference Result 22353 states and 34965 transitions. [2022-01-10 18:39:48,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 18:39:48,890 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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 77 [2022-01-10 18:39:48,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:39:48,921 INFO L225 Difference]: With dead ends: 22353 [2022-01-10 18:39:48,921 INFO L226 Difference]: Without dead ends: 15698 [2022-01-10 18:39:48,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 18:39:48,930 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 492 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:39:48,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 476 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:39:48,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15698 states. [2022-01-10 18:39:49,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15698 to 10184. [2022-01-10 18:39:49,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10184 states, 10183 states have (on average 1.5645683983109104) internal successors, (15932), 10183 states have internal predecessors, (15932), 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) [2022-01-10 18:39:49,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10184 states to 10184 states and 15932 transitions. [2022-01-10 18:39:49,408 INFO L78 Accepts]: Start accepts. Automaton has 10184 states and 15932 transitions. Word has length 77 [2022-01-10 18:39:49,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:39:49,408 INFO L470 AbstractCegarLoop]: Abstraction has 10184 states and 15932 transitions. [2022-01-10 18:39:49,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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) [2022-01-10 18:39:49,408 INFO L276 IsEmpty]: Start isEmpty. Operand 10184 states and 15932 transitions. [2022-01-10 18:39:49,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 18:39:49,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:39:49,410 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:39:49,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-10 18:39:49,410 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:39:49,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:39:49,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1553915253, now seen corresponding path program 1 times [2022-01-10 18:39:49,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:39:49,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484140204] [2022-01-10 18:39:49,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:39:49,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:39:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:39:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:39:49,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:39:49,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484140204] [2022-01-10 18:39:49,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484140204] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:39:49,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:39:49,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 18:39:49,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509038550] [2022-01-10 18:39:49,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:39:49,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 18:39:49,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:39:49,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 18:39:49,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 18:39:49,460 INFO L87 Difference]: Start difference. First operand 10184 states and 15932 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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) [2022-01-10 18:39:49,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:39:49,736 INFO L93 Difference]: Finished difference Result 15290 states and 23942 transitions. [2022-01-10 18:39:49,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 18:39:49,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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 77 [2022-01-10 18:39:49,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:39:49,752 INFO L225 Difference]: With dead ends: 15290 [2022-01-10 18:39:49,753 INFO L226 Difference]: Without dead ends: 8630 [2022-01-10 18:39:49,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:39:49,762 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 47 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:39:49,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 646 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:39:49,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8630 states. [2022-01-10 18:39:50,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8630 to 8630. [2022-01-10 18:39:50,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8630 states, 8629 states have (on average 1.5619422876347202) internal successors, (13478), 8629 states have internal predecessors, (13478), 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) [2022-01-10 18:39:50,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8630 states to 8630 states and 13478 transitions. [2022-01-10 18:39:50,125 INFO L78 Accepts]: Start accepts. Automaton has 8630 states and 13478 transitions. Word has length 77 [2022-01-10 18:39:50,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:39:50,126 INFO L470 AbstractCegarLoop]: Abstraction has 8630 states and 13478 transitions. [2022-01-10 18:39:50,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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) [2022-01-10 18:39:50,126 INFO L276 IsEmpty]: Start isEmpty. Operand 8630 states and 13478 transitions. [2022-01-10 18:39:50,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 18:39:50,127 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:39:50,127 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:39:50,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-10 18:39:50,127 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:39:50,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:39:50,128 INFO L85 PathProgramCache]: Analyzing trace with hash 756461332, now seen corresponding path program 1 times [2022-01-10 18:39:50,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:39:50,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442392038] [2022-01-10 18:39:50,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:39:50,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:39:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:39:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:39:50,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:39:50,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442392038] [2022-01-10 18:39:50,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442392038] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:39:50,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:39:50,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:39:50,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843365977] [2022-01-10 18:39:50,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:39:50,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:39:50,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:39:50,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:39:50,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:39:50,214 INFO L87 Difference]: Start difference. First operand 8630 states and 13478 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 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) [2022-01-10 18:39:50,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:39:50,766 INFO L93 Difference]: Finished difference Result 19175 states and 29882 transitions. [2022-01-10 18:39:50,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:39:50,766 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 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 77 [2022-01-10 18:39:50,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:39:50,786 INFO L225 Difference]: With dead ends: 19175 [2022-01-10 18:39:50,787 INFO L226 Difference]: Without dead ends: 12426 [2022-01-10 18:39:50,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 18:39:50,797 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 684 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:39:50,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 632 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:39:50,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12426 states. [2022-01-10 18:39:51,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12426 to 8840. [2022-01-10 18:39:51,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8840 states, 8839 states have (on average 1.5513067089037222) internal successors, (13712), 8839 states have internal predecessors, (13712), 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) [2022-01-10 18:39:51,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8840 states to 8840 states and 13712 transitions. [2022-01-10 18:39:51,263 INFO L78 Accepts]: Start accepts. Automaton has 8840 states and 13712 transitions. Word has length 77 [2022-01-10 18:39:51,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:39:51,264 INFO L470 AbstractCegarLoop]: Abstraction has 8840 states and 13712 transitions. [2022-01-10 18:39:51,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 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) [2022-01-10 18:39:51,264 INFO L276 IsEmpty]: Start isEmpty. Operand 8840 states and 13712 transitions. [2022-01-10 18:39:51,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 18:39:51,265 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:39:51,266 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:39:51,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-10 18:39:51,266 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:39:51,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:39:51,266 INFO L85 PathProgramCache]: Analyzing trace with hash -101174992, now seen corresponding path program 1 times [2022-01-10 18:39:51,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:39:51,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243749631] [2022-01-10 18:39:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:39:51,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:39:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:39:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:39:51,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:39:51,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243749631] [2022-01-10 18:39:51,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243749631] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:39:51,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:39:51,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 18:39:51,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157688579] [2022-01-10 18:39:51,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:39:51,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 18:39:51,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:39:51,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 18:39:51,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 18:39:51,317 INFO L87 Difference]: Start difference. First operand 8840 states and 13712 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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) [2022-01-10 18:39:51,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:39:51,660 INFO L93 Difference]: Finished difference Result 16271 states and 25222 transitions. [2022-01-10 18:39:51,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 18:39:51,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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 77 [2022-01-10 18:39:51,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:39:51,670 INFO L225 Difference]: With dead ends: 16271 [2022-01-10 18:39:51,671 INFO L226 Difference]: Without dead ends: 7474 [2022-01-10 18:39:51,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:39:51,681 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 45 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:39:51,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 640 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:39:51,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7474 states. [2022-01-10 18:39:52,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7474 to 7474. [2022-01-10 18:39:52,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7474 states, 7473 states have (on average 1.5479727017262144) internal successors, (11568), 7473 states have internal predecessors, (11568), 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) [2022-01-10 18:39:52,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7474 states to 7474 states and 11568 transitions. [2022-01-10 18:39:52,027 INFO L78 Accepts]: Start accepts. Automaton has 7474 states and 11568 transitions. Word has length 77 [2022-01-10 18:39:52,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:39:52,027 INFO L470 AbstractCegarLoop]: Abstraction has 7474 states and 11568 transitions. [2022-01-10 18:39:52,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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) [2022-01-10 18:39:52,027 INFO L276 IsEmpty]: Start isEmpty. Operand 7474 states and 11568 transitions. [2022-01-10 18:39:52,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 18:39:52,028 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:39:52,029 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:39:52,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-10 18:39:52,029 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:39:52,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:39:52,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1109974634, now seen corresponding path program 1 times [2022-01-10 18:39:52,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:39:52,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813248793] [2022-01-10 18:39:52,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:39:52,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:39:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:39:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:39:52,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:39:52,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813248793] [2022-01-10 18:39:52,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813248793] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:39:52,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:39:52,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:39:52,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263809812] [2022-01-10 18:39:52,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:39:52,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:39:52,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:39:52,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:39:52,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:39:52,060 INFO L87 Difference]: Start difference. First operand 7474 states and 11568 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2022-01-10 18:39:52,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:39:52,374 INFO L93 Difference]: Finished difference Result 13954 states and 21600 transitions. [2022-01-10 18:39:52,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:39:52,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 [2022-01-10 18:39:52,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:39:52,389 INFO L225 Difference]: With dead ends: 13954 [2022-01-10 18:39:52,389 INFO L226 Difference]: Without dead ends: 10313 [2022-01-10 18:39:52,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:39:52,396 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 182 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:39:52,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 502 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:39:52,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10313 states. [2022-01-10 18:39:52,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10313 to 7474. [2022-01-10 18:39:52,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7474 states, 7473 states have (on average 1.5477050715910612) internal successors, (11566), 7473 states have internal predecessors, (11566), 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) [2022-01-10 18:39:52,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7474 states to 7474 states and 11566 transitions. [2022-01-10 18:39:52,682 INFO L78 Accepts]: Start accepts. Automaton has 7474 states and 11566 transitions. Word has length 79 [2022-01-10 18:39:52,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:39:52,682 INFO L470 AbstractCegarLoop]: Abstraction has 7474 states and 11566 transitions. [2022-01-10 18:39:52,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2022-01-10 18:39:52,682 INFO L276 IsEmpty]: Start isEmpty. Operand 7474 states and 11566 transitions. [2022-01-10 18:39:52,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 18:39:52,684 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:39:52,684 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:39:52,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-10 18:39:52,684 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:39:52,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:39:52,684 INFO L85 PathProgramCache]: Analyzing trace with hash -776018099, now seen corresponding path program 1 times [2022-01-10 18:39:52,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:39:52,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551248102] [2022-01-10 18:39:52,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:39:52,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:39:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:39:52,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:39:52,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:39:52,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551248102] [2022-01-10 18:39:52,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551248102] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:39:52,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:39:52,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:39:52,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263625833] [2022-01-10 18:39:52,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:39:52,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:39:52,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:39:52,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:39:52,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:39:52,779 INFO L87 Difference]: Start difference. First operand 7474 states and 11566 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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) [2022-01-10 18:39:53,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:39:53,393 INFO L93 Difference]: Finished difference Result 20502 states and 32144 transitions. [2022-01-10 18:39:53,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:39:53,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 [2022-01-10 18:39:53,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:39:53,412 INFO L225 Difference]: With dead ends: 20502 [2022-01-10 18:39:53,412 INFO L226 Difference]: Without dead ends: 13508 [2022-01-10 18:39:53,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:39:53,420 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 97 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:39:53,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 371 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:39:53,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13508 states. [2022-01-10 18:39:54,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13508 to 13506. [2022-01-10 18:39:54,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13506 states, 13505 states have (on average 1.554239170677527) internal successors, (20990), 13505 states have internal predecessors, (20990), 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) [2022-01-10 18:39:54,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13506 states to 13506 states and 20990 transitions. [2022-01-10 18:39:54,074 INFO L78 Accepts]: Start accepts. Automaton has 13506 states and 20990 transitions. Word has length 80 [2022-01-10 18:39:54,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:39:54,075 INFO L470 AbstractCegarLoop]: Abstraction has 13506 states and 20990 transitions. [2022-01-10 18:39:54,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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) [2022-01-10 18:39:54,075 INFO L276 IsEmpty]: Start isEmpty. Operand 13506 states and 20990 transitions. [2022-01-10 18:39:54,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-10 18:39:54,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:39:54,076 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:39:54,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-10 18:39:54,076 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:39:54,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:39:54,077 INFO L85 PathProgramCache]: Analyzing trace with hash 644647588, now seen corresponding path program 1 times [2022-01-10 18:39:54,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:39:54,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451289140] [2022-01-10 18:39:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:39:54,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:39:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:39:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:39:54,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:39:54,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451289140] [2022-01-10 18:39:54,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451289140] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:39:54,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:39:54,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:39:54,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122842891] [2022-01-10 18:39:54,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:39:54,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:39:54,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:39:54,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:39:54,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:39:54,131 INFO L87 Difference]: Start difference. First operand 13506 states and 20990 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-01-10 18:39:55,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:39:55,109 INFO L93 Difference]: Finished difference Result 34383 states and 53582 transitions. [2022-01-10 18:39:55,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:39:55,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 82 [2022-01-10 18:39:55,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:39:55,133 INFO L225 Difference]: With dead ends: 34383 [2022-01-10 18:39:55,133 INFO L226 Difference]: Without dead ends: 21357 [2022-01-10 18:39:55,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:39:55,141 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 120 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:39:55,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 533 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:39:55,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21357 states. [2022-01-10 18:39:56,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21357 to 21355. [2022-01-10 18:39:56,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21355 states, 21354 states have (on average 1.536573943991758) internal successors, (32812), 21354 states have internal predecessors, (32812), 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) [2022-01-10 18:39:56,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21355 states to 21355 states and 32812 transitions. [2022-01-10 18:39:56,361 INFO L78 Accepts]: Start accepts. Automaton has 21355 states and 32812 transitions. Word has length 82 [2022-01-10 18:39:56,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:39:56,361 INFO L470 AbstractCegarLoop]: Abstraction has 21355 states and 32812 transitions. [2022-01-10 18:39:56,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-01-10 18:39:56,361 INFO L276 IsEmpty]: Start isEmpty. Operand 21355 states and 32812 transitions. [2022-01-10 18:39:56,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-10 18:39:56,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:39:56,363 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:39:56,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-10 18:39:56,363 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:39:56,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:39:56,364 INFO L85 PathProgramCache]: Analyzing trace with hash -675072808, now seen corresponding path program 1 times [2022-01-10 18:39:56,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:39:56,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577380451] [2022-01-10 18:39:56,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:39:56,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:39:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:39:56,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:39:56,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:39:56,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577380451] [2022-01-10 18:39:56,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577380451] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:39:56,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:39:56,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:39:56,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457414710] [2022-01-10 18:39:56,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:39:56,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:39:56,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:39:56,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:39:56,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:39:56,438 INFO L87 Difference]: Start difference. First operand 21355 states and 32812 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-01-10 18:39:57,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:39:57,972 INFO L93 Difference]: Finished difference Result 54339 states and 83618 transitions. [2022-01-10 18:39:57,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:39:57,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 82 [2022-01-10 18:39:57,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:39:58,028 INFO L225 Difference]: With dead ends: 54339 [2022-01-10 18:39:58,028 INFO L226 Difference]: Without dead ends: 33617 [2022-01-10 18:39:58,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:39:58,053 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 123 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:39:58,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 558 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:39:58,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33617 states. [2022-01-10 18:39:59,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33617 to 33615. [2022-01-10 18:39:59,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33615 states, 33614 states have (on average 1.5169869697149998) internal successors, (50992), 33614 states have internal predecessors, (50992), 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) [2022-01-10 18:39:59,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33615 states to 33615 states and 50992 transitions. [2022-01-10 18:39:59,861 INFO L78 Accepts]: Start accepts. Automaton has 33615 states and 50992 transitions. Word has length 82 [2022-01-10 18:39:59,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:39:59,861 INFO L470 AbstractCegarLoop]: Abstraction has 33615 states and 50992 transitions. [2022-01-10 18:39:59,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-01-10 18:39:59,861 INFO L276 IsEmpty]: Start isEmpty. Operand 33615 states and 50992 transitions. [2022-01-10 18:39:59,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 18:39:59,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:39:59,863 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:39:59,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-10 18:39:59,863 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:39:59,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:39:59,863 INFO L85 PathProgramCache]: Analyzing trace with hash -903834258, now seen corresponding path program 1 times [2022-01-10 18:39:59,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:39:59,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879693839] [2022-01-10 18:39:59,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:39:59,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:39:59,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:39:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:39:59,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:39:59,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879693839] [2022-01-10 18:39:59,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879693839] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:39:59,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:39:59,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 18:39:59,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259309696] [2022-01-10 18:39:59,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:39:59,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 18:39:59,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:39:59,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 18:39:59,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 18:39:59,939 INFO L87 Difference]: Start difference. First operand 33615 states and 50992 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:40:02,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:40:02,005 INFO L93 Difference]: Finished difference Result 60506 states and 91759 transitions. [2022-01-10 18:40:02,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 18:40:02,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-01-10 18:40:02,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:40:02,057 INFO L225 Difference]: With dead ends: 60506 [2022-01-10 18:40:02,057 INFO L226 Difference]: Without dead ends: 35544 [2022-01-10 18:40:02,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:40:02,111 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 472 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:40:02,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 381 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:40:02,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35544 states. [2022-01-10 18:40:03,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35544 to 33684. [2022-01-10 18:40:03,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33684 states, 33683 states have (on average 1.516195113261883) internal successors, (51070), 33683 states have internal predecessors, (51070), 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) [2022-01-10 18:40:04,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33684 states to 33684 states and 51070 transitions. [2022-01-10 18:40:04,039 INFO L78 Accepts]: Start accepts. Automaton has 33684 states and 51070 transitions. Word has length 83 [2022-01-10 18:40:04,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:40:04,039 INFO L470 AbstractCegarLoop]: Abstraction has 33684 states and 51070 transitions. [2022-01-10 18:40:04,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:40:04,039 INFO L276 IsEmpty]: Start isEmpty. Operand 33684 states and 51070 transitions. [2022-01-10 18:40:04,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 18:40:04,041 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:40:04,041 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:40:04,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-10 18:40:04,041 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:40:04,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:40:04,042 INFO L85 PathProgramCache]: Analyzing trace with hash 244349705, now seen corresponding path program 1 times [2022-01-10 18:40:04,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:40:04,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584478137] [2022-01-10 18:40:04,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:40:04,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:40:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:40:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:40:04,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:40:04,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584478137] [2022-01-10 18:40:04,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584478137] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:40:04,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:40:04,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:40:04,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3805269] [2022-01-10 18:40:04,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:40:04,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:40:04,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:40:04,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:40:04,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:40:04,097 INFO L87 Difference]: Start difference. First operand 33684 states and 51070 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:40:06,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:40:06,694 INFO L93 Difference]: Finished difference Result 75896 states and 115520 transitions. [2022-01-10 18:40:06,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:40:06,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-01-10 18:40:06,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:40:06,762 INFO L225 Difference]: With dead ends: 75896 [2022-01-10 18:40:06,762 INFO L226 Difference]: Without dead ends: 47478 [2022-01-10 18:40:06,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:40:06,776 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 103 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:40:06,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 406 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:40:06,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47478 states. [2022-01-10 18:40:09,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47478 to 45988. [2022-01-10 18:40:09,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45988 states, 45987 states have (on average 1.504033748668102) internal successors, (69166), 45987 states have internal predecessors, (69166), 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) [2022-01-10 18:40:09,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45988 states to 45988 states and 69166 transitions. [2022-01-10 18:40:09,453 INFO L78 Accepts]: Start accepts. Automaton has 45988 states and 69166 transitions. Word has length 83 [2022-01-10 18:40:09,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:40:09,454 INFO L470 AbstractCegarLoop]: Abstraction has 45988 states and 69166 transitions. [2022-01-10 18:40:09,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:40:09,454 INFO L276 IsEmpty]: Start isEmpty. Operand 45988 states and 69166 transitions. [2022-01-10 18:40:09,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-10 18:40:09,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:40:09,456 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:40:09,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-10 18:40:09,456 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:40:09,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:40:09,457 INFO L85 PathProgramCache]: Analyzing trace with hash 504265995, now seen corresponding path program 1 times [2022-01-10 18:40:09,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:40:09,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746138664] [2022-01-10 18:40:09,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:40:09,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:40:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:40:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:40:09,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:40:09,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746138664] [2022-01-10 18:40:09,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746138664] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:40:09,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:40:09,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:40:09,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324304018] [2022-01-10 18:40:09,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:40:09,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:40:09,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:40:09,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:40:09,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:40:09,499 INFO L87 Difference]: Start difference. First operand 45988 states and 69166 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2022-01-10 18:40:14,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:40:14,421 INFO L93 Difference]: Finished difference Result 137254 states and 206672 transitions. [2022-01-10 18:40:14,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:40:14,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 84 [2022-01-10 18:40:14,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:40:14,581 INFO L225 Difference]: With dead ends: 137254 [2022-01-10 18:40:14,582 INFO L226 Difference]: Without dead ends: 91757 [2022-01-10 18:40:14,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:40:14,618 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 172 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:40:14,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 566 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:40:14,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91757 states. [2022-01-10 18:40:17,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91757 to 46004. [2022-01-10 18:40:17,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46004 states, 46003 states have (on average 1.5038584440145208) internal successors, (69182), 46003 states have internal predecessors, (69182), 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) [2022-01-10 18:40:17,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46004 states to 46004 states and 69182 transitions. [2022-01-10 18:40:17,804 INFO L78 Accepts]: Start accepts. Automaton has 46004 states and 69182 transitions. Word has length 84 [2022-01-10 18:40:17,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:40:17,805 INFO L470 AbstractCegarLoop]: Abstraction has 46004 states and 69182 transitions. [2022-01-10 18:40:17,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2022-01-10 18:40:17,805 INFO L276 IsEmpty]: Start isEmpty. Operand 46004 states and 69182 transitions. [2022-01-10 18:40:17,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-10 18:40:17,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:40:17,807 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:40:17,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-10 18:40:17,807 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:40:17,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:40:17,807 INFO L85 PathProgramCache]: Analyzing trace with hash 929627703, now seen corresponding path program 1 times [2022-01-10 18:40:17,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:40:17,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845167854] [2022-01-10 18:40:17,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:40:17,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:40:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:40:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:40:17,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:40:17,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845167854] [2022-01-10 18:40:17,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845167854] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:40:17,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:40:17,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:40:17,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794331297] [2022-01-10 18:40:17,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:40:17,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:40:17,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:40:17,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:40:17,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:40:17,866 INFO L87 Difference]: Start difference. First operand 46004 states and 69182 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2022-01-10 18:40:21,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:40:21,113 INFO L93 Difference]: Finished difference Result 88690 states and 134336 transitions. [2022-01-10 18:40:21,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:40:21,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 84 [2022-01-10 18:40:21,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:40:21,216 INFO L225 Difference]: With dead ends: 88690 [2022-01-10 18:40:21,216 INFO L226 Difference]: Without dead ends: 58744 [2022-01-10 18:40:21,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:40:21,235 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 98 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 442 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 [2022-01-10 18:40:21,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 442 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:40:21,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58744 states. [2022-01-10 18:40:24,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58744 to 58742. [2022-01-10 18:40:24,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58742 states, 58741 states have (on average 1.5038899576105276) internal successors, (88340), 58741 states have internal predecessors, (88340), 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) [2022-01-10 18:40:24,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58742 states to 58742 states and 88340 transitions. [2022-01-10 18:40:24,728 INFO L78 Accepts]: Start accepts. Automaton has 58742 states and 88340 transitions. Word has length 84 [2022-01-10 18:40:24,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:40:24,728 INFO L470 AbstractCegarLoop]: Abstraction has 58742 states and 88340 transitions. [2022-01-10 18:40:24,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2022-01-10 18:40:24,728 INFO L276 IsEmpty]: Start isEmpty. Operand 58742 states and 88340 transitions. [2022-01-10 18:40:24,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-10 18:40:24,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:40:24,730 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:40:24,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-10 18:40:24,730 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:40:24,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:40:24,731 INFO L85 PathProgramCache]: Analyzing trace with hash -322225901, now seen corresponding path program 1 times [2022-01-10 18:40:24,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:40:24,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062163041] [2022-01-10 18:40:24,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:40:24,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:40:24,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:40:24,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:40:24,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:40:24,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062163041] [2022-01-10 18:40:24,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062163041] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:40:24,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:40:24,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:40:24,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721045620] [2022-01-10 18:40:24,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:40:24,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:40:24,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:40:24,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:40:24,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:40:24,818 INFO L87 Difference]: Start difference. First operand 58742 states and 88340 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 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) [2022-01-10 18:40:28,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:40:28,448 INFO L93 Difference]: Finished difference Result 117761 states and 176960 transitions. [2022-01-10 18:40:28,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 18:40:28,448 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 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 85 [2022-01-10 18:40:28,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:40:28,544 INFO L225 Difference]: With dead ends: 117761 [2022-01-10 18:40:28,544 INFO L226 Difference]: Without dead ends: 59127 [2022-01-10 18:40:28,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:40:28,583 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 358 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:40:28,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 649 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:40:28,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59127 states. [2022-01-10 18:40:32,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59127 to 58985. [2022-01-10 18:40:32,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58985 states, 58984 states have (on average 1.5016953750169537) internal successors, (88576), 58984 states have internal predecessors, (88576), 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) [2022-01-10 18:40:32,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58985 states to 58985 states and 88576 transitions. [2022-01-10 18:40:32,404 INFO L78 Accepts]: Start accepts. Automaton has 58985 states and 88576 transitions. Word has length 85 [2022-01-10 18:40:32,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:40:32,404 INFO L470 AbstractCegarLoop]: Abstraction has 58985 states and 88576 transitions. [2022-01-10 18:40:32,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 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) [2022-01-10 18:40:32,405 INFO L276 IsEmpty]: Start isEmpty. Operand 58985 states and 88576 transitions. [2022-01-10 18:40:32,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-10 18:40:32,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:40:32,407 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:40:32,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-10 18:40:32,407 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:40:32,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:40:32,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1968812753, now seen corresponding path program 1 times [2022-01-10 18:40:32,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:40:32,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768248055] [2022-01-10 18:40:32,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:40:32,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:40:32,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:40:32,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:40:32,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:40:32,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768248055] [2022-01-10 18:40:32,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768248055] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:40:32,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:40:32,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 18:40:32,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547892019] [2022-01-10 18:40:32,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:40:32,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 18:40:32,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:40:32,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 18:40:32,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 18:40:32,465 INFO L87 Difference]: Start difference. First operand 58985 states and 88576 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2022-01-10 18:40:35,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:40:35,792 INFO L93 Difference]: Finished difference Result 102620 states and 154090 transitions. [2022-01-10 18:40:35,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 18:40:35,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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 85 [2022-01-10 18:40:35,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:40:35,888 INFO L225 Difference]: With dead ends: 102620 [2022-01-10 18:40:35,889 INFO L226 Difference]: Without dead ends: 52607 [2022-01-10 18:40:35,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:40:35,921 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 23 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:40:35,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 616 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:40:35,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52607 states. [2022-01-10 18:40:39,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52607 to 52607. [2022-01-10 18:40:39,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52607 states, 52606 states have (on average 1.5000380184769797) internal successors, (78911), 52606 states have internal predecessors, (78911), 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) [2022-01-10 18:40:39,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52607 states to 52607 states and 78911 transitions. [2022-01-10 18:40:39,302 INFO L78 Accepts]: Start accepts. Automaton has 52607 states and 78911 transitions. Word has length 85 [2022-01-10 18:40:39,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:40:39,302 INFO L470 AbstractCegarLoop]: Abstraction has 52607 states and 78911 transitions. [2022-01-10 18:40:39,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2022-01-10 18:40:39,302 INFO L276 IsEmpty]: Start isEmpty. Operand 52607 states and 78911 transitions. [2022-01-10 18:40:39,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-10 18:40:39,304 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:40:39,304 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:40:39,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-10 18:40:39,304 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:40:39,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:40:39,305 INFO L85 PathProgramCache]: Analyzing trace with hash 70618535, now seen corresponding path program 1 times [2022-01-10 18:40:39,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:40:39,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077623746] [2022-01-10 18:40:39,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:40:39,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:40:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:40:39,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:40:39,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:40:39,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077623746] [2022-01-10 18:40:39,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077623746] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:40:39,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:40:39,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:40:39,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325475031] [2022-01-10 18:40:39,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:40:39,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:40:39,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:40:39,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:40:39,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:40:39,342 INFO L87 Difference]: Start difference. First operand 52607 states and 78911 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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)