/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_BITWISE.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 10:10:36,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 10:10:36,617 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 10:10:36,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 10:10:36,673 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 10:10:36,674 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 10:10:36,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 10:10:36,677 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 10:10:36,678 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 10:10:36,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 10:10:36,679 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 10:10:36,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 10:10:36,681 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 10:10:36,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 10:10:36,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 10:10:36,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 10:10:36,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 10:10:36,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 10:10:36,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 10:10:36,690 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 10:10:36,691 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 10:10:36,692 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 10:10:36,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 10:10:36,694 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 10:10:36,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 10:10:36,699 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 10:10:36,699 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 10:10:36,700 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 10:10:36,700 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 10:10:36,701 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 10:10:36,701 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 10:10:36,702 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 10:10:36,702 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 10:10:36,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 10:10:36,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 10:10:36,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 10:10:36,706 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf [2022-01-10 10:10:36,736 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 10:10:36,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 10:10:36,737 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 10:10:36,738 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 10:10:36,739 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 10:10:36,739 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 10:10:36,739 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 10:10:36,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 10:10:36,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 10:10:36,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 10:10:36,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 10:10:36,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 10:10:36,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 10:10:36,741 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 10:10:36,741 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 10:10:36,741 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 10:10:36,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 10:10:36,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 10:10:36,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 10:10:36,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 10:10:36,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 10:10:36,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 10:10:36,743 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 10:10:36,743 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 10:10:36,743 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 10:10:36,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 10:10:36,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 10:10:36,743 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 10:10:36,743 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 10:10:36,743 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 10:10:36,744 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 10:10:36,744 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 10:10:36,745 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 10:10:36,745 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_BITWISE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 10:10:36,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 10:10:37,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 10:10:37,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 10:10:37,014 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 10:10:37,014 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 10:10:37,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label22.c [2022-01-10 10:10:37,086 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/629995275/9aaac98185bb4033b4a0eef935ef1a09/FLAG679bcb21f [2022-01-10 10:10:37,709 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 10:10:37,710 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label22.c [2022-01-10 10:10:37,729 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/629995275/9aaac98185bb4033b4a0eef935ef1a09/FLAG679bcb21f [2022-01-10 10:10:38,076 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/629995275/9aaac98185bb4033b4a0eef935ef1a09 [2022-01-10 10:10:38,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 10:10:38,083 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 10:10:38,086 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 10:10:38,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 10:10:38,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 10:10:38,090 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 10:10:38" (1/1) ... [2022-01-10 10:10:38,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e0d839c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:38, skipping insertion in model container [2022-01-10 10:10:38,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 10:10:38" (1/1) ... [2022-01-10 10:10:38,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 10:10:38,170 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 10:10:38,672 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label22.c[56764,56777] [2022-01-10 10:10:38,722 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 10:10:38,735 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 10:10:38,966 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label22.c[56764,56777] [2022-01-10 10:10:38,981 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 10:10:38,999 INFO L208 MainTranslator]: Completed translation [2022-01-10 10:10:39,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:39 WrapperNode [2022-01-10 10:10:39,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 10:10:39,001 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 10:10:39,001 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 10:10:39,001 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 10:10:39,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:39" (1/1) ... [2022-01-10 10:10:39,050 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:39" (1/1) ... [2022-01-10 10:10:39,152 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1769 [2022-01-10 10:10:39,153 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 10:10:39,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 10:10:39,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 10:10:39,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 10:10:39,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:39" (1/1) ... [2022-01-10 10:10:39,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:39" (1/1) ... [2022-01-10 10:10:39,183 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:39" (1/1) ... [2022-01-10 10:10:39,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:39" (1/1) ... [2022-01-10 10:10:39,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:39" (1/1) ... [2022-01-10 10:10:39,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:39" (1/1) ... [2022-01-10 10:10:39,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:39" (1/1) ... [2022-01-10 10:10:39,272 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 10:10:39,273 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 10:10:39,273 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 10:10:39,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 10:10:39,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:39" (1/1) ... [2022-01-10 10:10:39,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 10:10:39,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 10:10:39,308 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 10:10:39,335 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 10:10:39,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 10:10:39,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 10:10:39,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 10:10:39,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 10:10:39,462 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 10:10:39,463 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 10:10:41,312 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 10:10:41,321 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 10:10:41,322 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 10:10:41,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 10:10:41 BoogieIcfgContainer [2022-01-10 10:10:41,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 10:10:41,328 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 10:10:41,328 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 10:10:41,330 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 10:10:41,332 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 10:10:41" (1/1) ... [2022-01-10 10:10:41,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 10:10:41 BasicIcfg [2022-01-10 10:10:41,759 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 10:10:41,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 10:10:41,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 10:10:41,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 10:10:41,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 10:10:38" (1/4) ... [2022-01-10 10:10:41,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68a05281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 10:10:41, skipping insertion in model container [2022-01-10 10:10:41,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:39" (2/4) ... [2022-01-10 10:10:41,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68a05281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 10:10:41, skipping insertion in model container [2022-01-10 10:10:41,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 10:10:41" (3/4) ... [2022-01-10 10:10:41,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68a05281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 10:10:41, skipping insertion in model container [2022-01-10 10:10:41,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 10:10:41" (4/4) ... [2022-01-10 10:10:41,766 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label22.cTransformedIcfg [2022-01-10 10:10:41,770 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 10:10:41,770 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 10:10:41,819 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 10:10:41,828 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 10:10:41,828 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 10:10:41,854 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 10:10:41,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 10:10:41,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:41,870 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:10:41,871 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:41,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:41,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1382485136, now seen corresponding path program 1 times [2022-01-10 10:10:41,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:41,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779035036] [2022-01-10 10:10:41,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:41,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:42,663 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 10:10:42,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:42,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779035036] [2022-01-10 10:10:42,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779035036] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:42,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:42,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:10:42,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537213925] [2022-01-10 10:10:42,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:42,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:42,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:42,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:42,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:42,708 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 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 10:10:44,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:44,106 INFO L93 Difference]: Finished difference Result 816 states and 1453 transitions. [2022-01-10 10:10:44,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:44,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 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 167 [2022-01-10 10:10:44,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:44,144 INFO L225 Difference]: With dead ends: 816 [2022-01-10 10:10:44,145 INFO L226 Difference]: Without dead ends: 450 [2022-01-10 10:10:44,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:44,154 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 143 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:44,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 130 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-10 10:10:44,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-01-10 10:10:44,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2022-01-10 10:10:44,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 1.621923937360179) internal successors, (725), 447 states have internal predecessors, (725), 0 states have call successors, (0), 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 10:10:44,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 725 transitions. [2022-01-10 10:10:44,208 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 725 transitions. Word has length 167 [2022-01-10 10:10:44,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:44,209 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 725 transitions. [2022-01-10 10:10:44,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 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 10:10:44,210 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 725 transitions. [2022-01-10 10:10:44,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-10 10:10:44,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:44,213 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:10:44,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 10:10:44,214 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:44,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:44,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1790473766, now seen corresponding path program 1 times [2022-01-10 10:10:44,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:44,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847047439] [2022-01-10 10:10:44,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:44,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 10:10:44,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:44,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847047439] [2022-01-10 10:10:44,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847047439] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:44,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:44,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:10:44,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871750797] [2022-01-10 10:10:44,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:44,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:44,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:44,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:44,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:44,365 INFO L87 Difference]: Start difference. First operand 448 states and 725 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 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 10:10:44,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:44,800 INFO L93 Difference]: Finished difference Result 1327 states and 2154 transitions. [2022-01-10 10:10:44,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:44,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 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 172 [2022-01-10 10:10:44,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:44,805 INFO L225 Difference]: With dead ends: 1327 [2022-01-10 10:10:44,805 INFO L226 Difference]: Without dead ends: 881 [2022-01-10 10:10:44,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:44,812 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 360 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:44,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 555 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 10:10:44,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-01-10 10:10:44,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 879. [2022-01-10 10:10:44,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 1.6207289293849658) internal successors, (1423), 878 states have internal predecessors, (1423), 0 states have call successors, (0), 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 10:10:44,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1423 transitions. [2022-01-10 10:10:44,858 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1423 transitions. Word has length 172 [2022-01-10 10:10:44,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:44,860 INFO L470 AbstractCegarLoop]: Abstraction has 879 states and 1423 transitions. [2022-01-10 10:10:44,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 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 10:10:44,860 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1423 transitions. [2022-01-10 10:10:44,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-10 10:10:44,864 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:44,865 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:10:44,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 10:10:44,865 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:44,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:44,866 INFO L85 PathProgramCache]: Analyzing trace with hash -325325524, now seen corresponding path program 1 times [2022-01-10 10:10:44,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:44,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693156428] [2022-01-10 10:10:44,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:44,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 10:10:45,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:45,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693156428] [2022-01-10 10:10:45,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693156428] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:45,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:45,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:10:45,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356411178] [2022-01-10 10:10:45,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:45,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:45,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:45,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:45,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:45,041 INFO L87 Difference]: Start difference. First operand 879 states and 1423 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 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 10:10:46,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:46,232 INFO L93 Difference]: Finished difference Result 2601 states and 4231 transitions. [2022-01-10 10:10:46,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:46,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 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 175 [2022-01-10 10:10:46,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:46,239 INFO L225 Difference]: With dead ends: 2601 [2022-01-10 10:10:46,239 INFO L226 Difference]: Without dead ends: 1724 [2022-01-10 10:10:46,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:46,242 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:46,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 97 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 10:10:46,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1724 states. [2022-01-10 10:10:46,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1724 to 1699. [2022-01-10 10:10:46,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1698 states have (on average 1.5871613663133097) internal successors, (2695), 1698 states have internal predecessors, (2695), 0 states have call successors, (0), 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 10:10:46,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2695 transitions. [2022-01-10 10:10:46,279 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2695 transitions. Word has length 175 [2022-01-10 10:10:46,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:46,279 INFO L470 AbstractCegarLoop]: Abstraction has 1699 states and 2695 transitions. [2022-01-10 10:10:46,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 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 10:10:46,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2695 transitions. [2022-01-10 10:10:46,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-10 10:10:46,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:46,284 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:10:46,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 10:10:46,285 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:46,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:46,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1813697352, now seen corresponding path program 1 times [2022-01-10 10:10:46,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:46,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170382172] [2022-01-10 10:10:46,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:46,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:46,400 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 10:10:46,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:46,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170382172] [2022-01-10 10:10:46,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170382172] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:46,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:46,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:10:46,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048109555] [2022-01-10 10:10:46,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:46,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:46,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:46,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:46,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:46,402 INFO L87 Difference]: Start difference. First operand 1699 states and 2695 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 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 10:10:46,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:46,982 INFO L93 Difference]: Finished difference Result 3356 states and 5334 transitions. [2022-01-10 10:10:46,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:46,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 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 185 [2022-01-10 10:10:46,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:46,989 INFO L225 Difference]: With dead ends: 3356 [2022-01-10 10:10:46,990 INFO L226 Difference]: Without dead ends: 1659 [2022-01-10 10:10:46,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:46,993 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 329 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:46,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 10:10:46,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2022-01-10 10:10:47,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1659. [2022-01-10 10:10:47,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1658 states have (on average 1.551869722557298) internal successors, (2573), 1658 states have internal predecessors, (2573), 0 states have call successors, (0), 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 10:10:47,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 2573 transitions. [2022-01-10 10:10:47,032 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 2573 transitions. Word has length 185 [2022-01-10 10:10:47,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:47,032 INFO L470 AbstractCegarLoop]: Abstraction has 1659 states and 2573 transitions. [2022-01-10 10:10:47,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 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 10:10:47,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 2573 transitions. [2022-01-10 10:10:47,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-01-10 10:10:47,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:47,037 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:10:47,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 10:10:47,037 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:47,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:47,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1869479062, now seen corresponding path program 1 times [2022-01-10 10:10:47,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:47,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840503320] [2022-01-10 10:10:47,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:47,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:47,251 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 10:10:47,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:47,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840503320] [2022-01-10 10:10:47,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840503320] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:47,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:47,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:10:47,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796356587] [2022-01-10 10:10:47,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:47,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 10:10:47,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:47,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 10:10:47,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:10:47,255 INFO L87 Difference]: Start difference. First operand 1659 states and 2573 transitions. Second operand has 4 states, 4 states have (on average 51.25) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 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 10:10:48,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:48,712 INFO L93 Difference]: Finished difference Result 5796 states and 9031 transitions. [2022-01-10 10:10:48,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 10:10:48,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.25) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 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 205 [2022-01-10 10:10:48,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:48,728 INFO L225 Difference]: With dead ends: 5796 [2022-01-10 10:10:48,728 INFO L226 Difference]: Without dead ends: 4139 [2022-01-10 10:10:48,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 10:10:48,732 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 489 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:48,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 487 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-10 10:10:48,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2022-01-10 10:10:48,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 4125. [2022-01-10 10:10:48,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4125 states, 4124 states have (on average 1.5329776915615907) internal successors, (6322), 4124 states have internal predecessors, (6322), 0 states have call successors, (0), 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 10:10:48,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4125 states to 4125 states and 6322 transitions. [2022-01-10 10:10:48,821 INFO L78 Accepts]: Start accepts. Automaton has 4125 states and 6322 transitions. Word has length 205 [2022-01-10 10:10:48,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:48,822 INFO L470 AbstractCegarLoop]: Abstraction has 4125 states and 6322 transitions. [2022-01-10 10:10:48,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.25) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 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 10:10:48,825 INFO L276 IsEmpty]: Start isEmpty. Operand 4125 states and 6322 transitions. [2022-01-10 10:10:48,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-01-10 10:10:48,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:48,835 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:10:48,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 10:10:48,835 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:48,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:48,836 INFO L85 PathProgramCache]: Analyzing trace with hash 88938615, now seen corresponding path program 1 times [2022-01-10 10:10:48,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:48,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449444240] [2022-01-10 10:10:48,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:48,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:49,047 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 10:10:49,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:49,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449444240] [2022-01-10 10:10:49,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449444240] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:49,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:49,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:10:49,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356288981] [2022-01-10 10:10:49,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:49,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:49,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:49,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:49,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:49,050 INFO L87 Difference]: Start difference. First operand 4125 states and 6322 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 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 10:10:50,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:50,086 INFO L93 Difference]: Finished difference Result 12326 states and 18897 transitions. [2022-01-10 10:10:50,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:50,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 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 217 [2022-01-10 10:10:50,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:50,121 INFO L225 Difference]: With dead ends: 12326 [2022-01-10 10:10:50,121 INFO L226 Difference]: Without dead ends: 8203 [2022-01-10 10:10:50,168 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 10:10:50,171 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 197 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:50,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 93 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 10:10:50,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8203 states. [2022-01-10 10:10:50,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8203 to 8198. [2022-01-10 10:10:50,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8198 states, 8197 states have (on average 1.452604611443211) internal successors, (11907), 8197 states have internal predecessors, (11907), 0 states have call successors, (0), 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 10:10:50,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8198 states to 8198 states and 11907 transitions. [2022-01-10 10:10:50,347 INFO L78 Accepts]: Start accepts. Automaton has 8198 states and 11907 transitions. Word has length 217 [2022-01-10 10:10:50,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:50,348 INFO L470 AbstractCegarLoop]: Abstraction has 8198 states and 11907 transitions. [2022-01-10 10:10:50,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 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 10:10:50,348 INFO L276 IsEmpty]: Start isEmpty. Operand 8198 states and 11907 transitions. [2022-01-10 10:10:50,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-01-10 10:10:50,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:50,356 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:10:50,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 10:10:50,357 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:50,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:50,357 INFO L85 PathProgramCache]: Analyzing trace with hash 363738948, now seen corresponding path program 1 times [2022-01-10 10:10:50,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:50,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42511429] [2022-01-10 10:10:50,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:50,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:50,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:50,542 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 10:10:50,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:50,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42511429] [2022-01-10 10:10:50,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42511429] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:50,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:50,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:10:50,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406636734] [2022-01-10 10:10:50,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:50,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:50,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:50,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:50,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:50,545 INFO L87 Difference]: Start difference. First operand 8198 states and 11907 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 10:10:51,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:51,672 INFO L93 Difference]: Finished difference Result 23504 states and 34150 transitions. [2022-01-10 10:10:51,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:51,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 227 [2022-01-10 10:10:51,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:51,726 INFO L225 Difference]: With dead ends: 23504 [2022-01-10 10:10:51,726 INFO L226 Difference]: Without dead ends: 15308 [2022-01-10 10:10:51,739 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 10:10:51,742 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 190 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:51,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 101 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 10:10:51,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15308 states. [2022-01-10 10:10:51,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15308 to 15304. [2022-01-10 10:10:51,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15304 states, 15303 states have (on average 1.3978958374175) internal successors, (21392), 15303 states have internal predecessors, (21392), 0 states have call successors, (0), 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 10:10:52,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15304 states to 15304 states and 21392 transitions. [2022-01-10 10:10:52,017 INFO L78 Accepts]: Start accepts. Automaton has 15304 states and 21392 transitions. Word has length 227 [2022-01-10 10:10:52,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:52,017 INFO L470 AbstractCegarLoop]: Abstraction has 15304 states and 21392 transitions. [2022-01-10 10:10:52,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 10:10:52,018 INFO L276 IsEmpty]: Start isEmpty. Operand 15304 states and 21392 transitions. [2022-01-10 10:10:52,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-01-10 10:10:52,033 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:52,033 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:10:52,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 10:10:52,033 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:52,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:52,034 INFO L85 PathProgramCache]: Analyzing trace with hash 315553840, now seen corresponding path program 1 times [2022-01-10 10:10:52,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:52,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905065666] [2022-01-10 10:10:52,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:52,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:52,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:52,230 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 10:10:52,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:52,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905065666] [2022-01-10 10:10:52,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905065666] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:52,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:52,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:10:52,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119810980] [2022-01-10 10:10:52,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:52,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:52,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:52,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:52,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:52,232 INFO L87 Difference]: Start difference. First operand 15304 states and 21392 transitions. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 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 10:10:53,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:53,328 INFO L93 Difference]: Finished difference Result 30612 states and 42793 transitions. [2022-01-10 10:10:53,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:53,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 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 243 [2022-01-10 10:10:53,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:53,359 INFO L225 Difference]: With dead ends: 30612 [2022-01-10 10:10:53,359 INFO L226 Difference]: Without dead ends: 15310 [2022-01-10 10:10:53,377 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 10:10:53,378 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 158 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:53,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 375 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 10:10:53,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15310 states. [2022-01-10 10:10:53,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15310 to 15304. [2022-01-10 10:10:53,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15304 states, 15303 states have (on average 1.2496242566816964) internal successors, (19123), 15303 states have internal predecessors, (19123), 0 states have call successors, (0), 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 10:10:53,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15304 states to 15304 states and 19123 transitions. [2022-01-10 10:10:53,591 INFO L78 Accepts]: Start accepts. Automaton has 15304 states and 19123 transitions. Word has length 243 [2022-01-10 10:10:53,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:53,591 INFO L470 AbstractCegarLoop]: Abstraction has 15304 states and 19123 transitions. [2022-01-10 10:10:53,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 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 10:10:53,592 INFO L276 IsEmpty]: Start isEmpty. Operand 15304 states and 19123 transitions. [2022-01-10 10:10:53,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-01-10 10:10:53,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:53,607 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:10:53,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 10:10:53,607 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:53,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:53,608 INFO L85 PathProgramCache]: Analyzing trace with hash 277489398, now seen corresponding path program 1 times [2022-01-10 10:10:53,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:53,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907516261] [2022-01-10 10:10:53,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:53,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:53,761 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-10 10:10:53,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:53,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907516261] [2022-01-10 10:10:53,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907516261] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:53,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:53,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:10:53,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708818917] [2022-01-10 10:10:53,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:53,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:53,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:53,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:53,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:53,764 INFO L87 Difference]: Start difference. First operand 15304 states and 19123 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 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 10:10:54,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:54,707 INFO L93 Difference]: Finished difference Result 36321 states and 45066 transitions. [2022-01-10 10:10:54,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:54,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 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 251 [2022-01-10 10:10:54,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:54,750 INFO L225 Difference]: With dead ends: 36321 [2022-01-10 10:10:54,750 INFO L226 Difference]: Without dead ends: 21019 [2022-01-10 10:10:54,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:54,770 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 227 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:54,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 103 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 10:10:54,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21019 states. [2022-01-10 10:10:55,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21019 to 21015. [2022-01-10 10:10:55,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21015 states, 21014 states have (on average 1.225135623869801) internal successors, (25745), 21014 states have internal predecessors, (25745), 0 states have call successors, (0), 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 10:10:55,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21015 states to 21015 states and 25745 transitions. [2022-01-10 10:10:55,203 INFO L78 Accepts]: Start accepts. Automaton has 21015 states and 25745 transitions. Word has length 251 [2022-01-10 10:10:55,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:55,203 INFO L470 AbstractCegarLoop]: Abstraction has 21015 states and 25745 transitions. [2022-01-10 10:10:55,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 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 10:10:55,203 INFO L276 IsEmpty]: Start isEmpty. Operand 21015 states and 25745 transitions. [2022-01-10 10:10:55,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-01-10 10:10:55,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:55,226 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:10:55,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 10:10:55,226 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:55,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:55,227 INFO L85 PathProgramCache]: Analyzing trace with hash 806325708, now seen corresponding path program 1 times [2022-01-10 10:10:55,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:55,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370395374] [2022-01-10 10:10:55,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:55,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:55,502 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 10:10:55,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:55,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370395374] [2022-01-10 10:10:55,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370395374] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:55,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:55,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:10:55,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682413354] [2022-01-10 10:10:55,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:55,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:55,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:55,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:55,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:55,504 INFO L87 Difference]: Start difference. First operand 21015 states and 25745 transitions. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 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 10:10:56,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:56,586 INFO L93 Difference]: Finished difference Result 56678 states and 69372 transitions. [2022-01-10 10:10:56,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:56,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 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 256 [2022-01-10 10:10:56,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:56,653 INFO L225 Difference]: With dead ends: 56678 [2022-01-10 10:10:56,654 INFO L226 Difference]: Without dead ends: 35665 [2022-01-10 10:10:56,683 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 10:10:56,683 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 159 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:56,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 357 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 10:10:56,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35665 states. [2022-01-10 10:10:57,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35665 to 35655. [2022-01-10 10:10:57,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35655 states, 35654 states have (on average 1.1977337746115442) internal successors, (42704), 35654 states have internal predecessors, (42704), 0 states have call successors, (0), 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 10:10:57,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35655 states to 35655 states and 42704 transitions. [2022-01-10 10:10:57,307 INFO L78 Accepts]: Start accepts. Automaton has 35655 states and 42704 transitions. Word has length 256 [2022-01-10 10:10:57,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:57,308 INFO L470 AbstractCegarLoop]: Abstraction has 35655 states and 42704 transitions. [2022-01-10 10:10:57,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 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 10:10:57,308 INFO L276 IsEmpty]: Start isEmpty. Operand 35655 states and 42704 transitions. [2022-01-10 10:10:57,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-01-10 10:10:57,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:57,342 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:10:57,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 10:10:57,342 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:57,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:57,343 INFO L85 PathProgramCache]: Analyzing trace with hash -279030903, now seen corresponding path program 1 times [2022-01-10 10:10:57,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:57,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130343865] [2022-01-10 10:10:57,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:57,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-10 10:10:57,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:57,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130343865] [2022-01-10 10:10:57,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130343865] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:57,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:57,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:10:57,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261840691] [2022-01-10 10:10:57,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:57,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:57,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:57,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:57,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:57,635 INFO L87 Difference]: Start difference. First operand 35655 states and 42704 transitions. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 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 10:10:58,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:58,872 INFO L93 Difference]: Finished difference Result 81906 states and 97786 transitions. [2022-01-10 10:10:58,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:58,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 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 269 [2022-01-10 10:10:58,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:58,963 INFO L225 Difference]: With dead ends: 81906 [2022-01-10 10:10:58,963 INFO L226 Difference]: Without dead ends: 46253 [2022-01-10 10:10:58,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:58,999 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 205 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:59,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 112 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 10:10:59,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46253 states. [2022-01-10 10:10:59,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46253 to 46251. [2022-01-10 10:10:59,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46251 states, 46250 states have (on average 1.189772972972973) internal successors, (55027), 46250 states have internal predecessors, (55027), 0 states have call successors, (0), 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 10:10:59,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46251 states to 46251 states and 55027 transitions. [2022-01-10 10:10:59,763 INFO L78 Accepts]: Start accepts. Automaton has 46251 states and 55027 transitions. Word has length 269 [2022-01-10 10:10:59,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:59,764 INFO L470 AbstractCegarLoop]: Abstraction has 46251 states and 55027 transitions. [2022-01-10 10:10:59,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 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 10:10:59,764 INFO L276 IsEmpty]: Start isEmpty. Operand 46251 states and 55027 transitions. [2022-01-10 10:10:59,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-01-10 10:10:59,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:59,798 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:10:59,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 10:10:59,799 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:59,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:59,799 INFO L85 PathProgramCache]: Analyzing trace with hash 754561569, now seen corresponding path program 1 times [2022-01-10 10:10:59,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:59,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610748576] [2022-01-10 10:10:59,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:59,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:11:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:11:00,102 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-10 10:11:00,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:11:00,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610748576] [2022-01-10 10:11:00,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610748576] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:11:00,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:11:00,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:11:00,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352792964] [2022-01-10 10:11:00,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:11:00,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 10:11:00,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:11:00,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 10:11:00,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:11:00,104 INFO L87 Difference]: Start difference. First operand 46251 states and 55027 transitions. Second operand has 4 states, 4 states have (on average 50.75) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 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 10:11:01,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:11:01,550 INFO L93 Difference]: Finished difference Result 98801 states and 117057 transitions. [2022-01-10 10:11:01,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 10:11:01,551 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 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 276 [2022-01-10 10:11:01,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:11:01,641 INFO L225 Difference]: With dead ends: 98801 [2022-01-10 10:11:01,641 INFO L226 Difference]: Without dead ends: 52552 [2022-01-10 10:11:01,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 10:11:01,665 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 763 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 10:11:01,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [763 Valid, 311 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 10:11:01,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52552 states. [2022-01-10 10:11:02,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52552 to 52544. [2022-01-10 10:11:02,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52544 states, 52543 states have (on average 1.1795101155244276) internal successors, (61975), 52543 states have internal predecessors, (61975), 0 states have call successors, (0), 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 10:11:02,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52544 states to 52544 states and 61975 transitions. [2022-01-10 10:11:02,509 INFO L78 Accepts]: Start accepts. Automaton has 52544 states and 61975 transitions. Word has length 276 [2022-01-10 10:11:02,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:11:02,509 INFO L470 AbstractCegarLoop]: Abstraction has 52544 states and 61975 transitions. [2022-01-10 10:11:02,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 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 10:11:02,510 INFO L276 IsEmpty]: Start isEmpty. Operand 52544 states and 61975 transitions. [2022-01-10 10:11:02,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2022-01-10 10:11:02,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:11:02,543 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:11:02,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 10:11:02,543 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:11:02,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:11:02,544 INFO L85 PathProgramCache]: Analyzing trace with hash 764075758, now seen corresponding path program 1 times [2022-01-10 10:11:02,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:11:02,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918447717] [2022-01-10 10:11:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:11:02,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:11:02,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:11:03,007 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 10:11:03,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:11:03,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918447717] [2022-01-10 10:11:03,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918447717] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:11:03,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:11:03,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:11:03,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901429023] [2022-01-10 10:11:03,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:11:03,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:11:03,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:11:03,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:11:03,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:11:03,010 INFO L87 Difference]: Start difference. First operand 52544 states and 61975 transitions. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 2 states have internal predecessors, (295), 0 states have call successors, (0), 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 10:11:04,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:11:04,379 INFO L93 Difference]: Finished difference Result 135737 states and 159418 transitions. [2022-01-10 10:11:04,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:11:04,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 2 states have internal predecessors, (295), 0 states have call successors, (0), 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 300 [2022-01-10 10:11:04,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:11:04,502 INFO L225 Difference]: With dead ends: 135737 [2022-01-10 10:11:04,502 INFO L226 Difference]: Without dead ends: 83195 [2022-01-10 10:11:04,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:11:04,552 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 94 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 10:11:04,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 141 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 10:11:04,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83195 states. [2022-01-10 10:11:05,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83195 to 71011. [2022-01-10 10:11:05,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71011 states, 71010 states have (on average 1.1438388959301506) internal successors, (81224), 71010 states have internal predecessors, (81224), 0 states have call successors, (0), 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 10:11:05,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71011 states to 71011 states and 81224 transitions. [2022-01-10 10:11:05,853 INFO L78 Accepts]: Start accepts. Automaton has 71011 states and 81224 transitions. Word has length 300 [2022-01-10 10:11:05,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:11:05,854 INFO L470 AbstractCegarLoop]: Abstraction has 71011 states and 81224 transitions. [2022-01-10 10:11:05,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 2 states have internal predecessors, (295), 0 states have call successors, (0), 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 10:11:05,854 INFO L276 IsEmpty]: Start isEmpty. Operand 71011 states and 81224 transitions. [2022-01-10 10:11:05,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-01-10 10:11:05,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:11:05,894 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:11:05,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 10:11:05,895 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:11:05,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:11:05,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1495378076, now seen corresponding path program 1 times [2022-01-10 10:11:05,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:11:05,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021390499] [2022-01-10 10:11:05,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:11:05,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:11:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:11:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-01-10 10:11:06,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:11:06,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021390499] [2022-01-10 10:11:06,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021390499] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:11:06,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:11:06,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:11:06,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749475240] [2022-01-10 10:11:06,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:11:06,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:11:06,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:11:06,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:11:06,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:11:06,353 INFO L87 Difference]: Start difference. First operand 71011 states and 81224 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 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 10:11:07,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:11:07,641 INFO L93 Difference]: Finished difference Result 124317 states and 141992 transitions. [2022-01-10 10:11:07,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:11:07,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 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 310 [2022-01-10 10:11:07,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:11:07,715 INFO L225 Difference]: With dead ends: 124317 [2022-01-10 10:11:07,716 INFO L226 Difference]: Without dead ends: 53308 [2022-01-10 10:11:07,756 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 10:11:07,757 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 167 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 10:11:07,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 327 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 10:11:07,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53308 states. [2022-01-10 10:11:08,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53308 to 46177. [2022-01-10 10:11:08,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46177 states, 46176 states have (on average 1.1284650034650034) internal successors, (52108), 46176 states have internal predecessors, (52108), 0 states have call successors, (0), 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 10:11:08,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46177 states to 46177 states and 52108 transitions. [2022-01-10 10:11:08,548 INFO L78 Accepts]: Start accepts. Automaton has 46177 states and 52108 transitions. Word has length 310 [2022-01-10 10:11:08,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:11:08,548 INFO L470 AbstractCegarLoop]: Abstraction has 46177 states and 52108 transitions. [2022-01-10 10:11:08,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 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 10:11:08,548 INFO L276 IsEmpty]: Start isEmpty. Operand 46177 states and 52108 transitions. [2022-01-10 10:11:08,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-01-10 10:11:08,575 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:11:08,575 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:11:08,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-10 10:11:08,576 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:11:08,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:11:08,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1375209946, now seen corresponding path program 1 times [2022-01-10 10:11:08,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:11:08,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486922785] [2022-01-10 10:11:08,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:11:08,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:11:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:11:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-10 10:11:08,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:11:08,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486922785] [2022-01-10 10:11:08,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486922785] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:11:08,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:11:08,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:11:08,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360830037] [2022-01-10 10:11:08,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:11:08,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 10:11:08,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:11:08,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 10:11:08,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:11:08,990 INFO L87 Difference]: Start difference. First operand 46177 states and 52108 transitions. Second operand has 4 states, 4 states have (on average 63.25) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 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 10:11:10,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:11:10,638 INFO L93 Difference]: Finished difference Result 93597 states and 105698 transitions. [2022-01-10 10:11:10,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 10:11:10,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 63.25) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 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 326 [2022-01-10 10:11:10,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:11:10,693 INFO L225 Difference]: With dead ends: 93597 [2022-01-10 10:11:10,693 INFO L226 Difference]: Without dead ends: 47422 [2022-01-10 10:11:10,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 10:11:10,716 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 357 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-10 10:11:10,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 98 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-10 10:11:10,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47422 states. [2022-01-10 10:11:11,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47422 to 44147. [2022-01-10 10:11:11,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44147 states, 44146 states have (on average 1.13138223168577) internal successors, (49946), 44146 states have internal predecessors, (49946), 0 states have call successors, (0), 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 10:11:11,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44147 states to 44147 states and 49946 transitions. [2022-01-10 10:11:11,420 INFO L78 Accepts]: Start accepts. Automaton has 44147 states and 49946 transitions. Word has length 326 [2022-01-10 10:11:11,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:11:11,421 INFO L470 AbstractCegarLoop]: Abstraction has 44147 states and 49946 transitions. [2022-01-10 10:11:11,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.25) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 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 10:11:11,422 INFO L276 IsEmpty]: Start isEmpty. Operand 44147 states and 49946 transitions. [2022-01-10 10:11:11,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2022-01-10 10:11:11,457 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:11:11,458 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:11:11,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-10 10:11:11,459 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:11:11,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:11:11,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1127004048, now seen corresponding path program 1 times [2022-01-10 10:11:11,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:11:11,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442455496] [2022-01-10 10:11:11,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:11:11,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:11:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:11:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 307 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-10 10:11:11,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:11:11,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442455496] [2022-01-10 10:11:11,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442455496] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:11:11,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:11:11,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:11:11,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923348349] [2022-01-10 10:11:11,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:11:11,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:11:11,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:11:11,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:11:11,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:11:11,752 INFO L87 Difference]: Start difference. First operand 44147 states and 49946 transitions. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 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 10:11:12,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:11:12,512 INFO L93 Difference]: Finished difference Result 121016 states and 137257 transitions. [2022-01-10 10:11:12,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:11:12,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 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 369 [2022-01-10 10:11:12,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:11:12,618 INFO L225 Difference]: With dead ends: 121016 [2022-01-10 10:11:12,618 INFO L226 Difference]: Without dead ends: 76871 [2022-01-10 10:11:12,659 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 10:11:12,659 INFO L933 BasicCegarLoop]: 579 mSDtfsCounter, 240 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 10:11:12,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 812 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 10:11:12,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76871 states. [2022-01-10 10:11:13,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76871 to 70984. [2022-01-10 10:11:13,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70984 states, 70983 states have (on average 1.1282560613104546) internal successors, (80087), 70983 states have internal predecessors, (80087), 0 states have call successors, (0), 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 10:11:13,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70984 states to 70984 states and 80087 transitions. [2022-01-10 10:11:13,739 INFO L78 Accepts]: Start accepts. Automaton has 70984 states and 80087 transitions. Word has length 369 [2022-01-10 10:11:13,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:11:13,740 INFO L470 AbstractCegarLoop]: Abstraction has 70984 states and 80087 transitions. [2022-01-10 10:11:13,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 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 10:11:13,740 INFO L276 IsEmpty]: Start isEmpty. Operand 70984 states and 80087 transitions. [2022-01-10 10:11:13,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2022-01-10 10:11:13,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:11:13,780 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:11:13,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-10 10:11:13,780 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:11:13,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:11:13,780 INFO L85 PathProgramCache]: Analyzing trace with hash -110023802, now seen corresponding path program 1 times [2022-01-10 10:11:13,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:11:13,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706621564] [2022-01-10 10:11:13,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:11:13,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:11:14,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:11:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-01-10 10:11:14,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:11:14,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706621564] [2022-01-10 10:11:14,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706621564] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:11:14,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:11:14,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:11:14,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875652578] [2022-01-10 10:11:14,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:11:14,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:11:14,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:11:14,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:11:14,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:11:14,225 INFO L87 Difference]: Start difference. First operand 70984 states and 80087 transitions. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 2 states have internal predecessors, (245), 0 states have call successors, (0), 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 10:11:15,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:11:15,452 INFO L93 Difference]: Finished difference Result 155417 states and 176026 transitions. [2022-01-10 10:11:15,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:11:15,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 2 states have internal predecessors, (245), 0 states have call successors, (0), 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 376 [2022-01-10 10:11:15,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:11:15,563 INFO L225 Difference]: With dead ends: 155417 [2022-01-10 10:11:15,564 INFO L226 Difference]: Without dead ends: 84435 [2022-01-10 10:11:15,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:11:15,614 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 154 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 10:11:15,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 117 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 10:11:15,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84435 states. [2022-01-10 10:11:16,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84435 to 81345. [2022-01-10 10:11:16,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81345 states, 81344 states have (on average 1.1358674272226594) internal successors, (92396), 81344 states have internal predecessors, (92396), 0 states have call successors, (0), 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 10:11:16,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81345 states to 81345 states and 92396 transitions. [2022-01-10 10:11:16,858 INFO L78 Accepts]: Start accepts. Automaton has 81345 states and 92396 transitions. Word has length 376 [2022-01-10 10:11:16,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:11:16,858 INFO L470 AbstractCegarLoop]: Abstraction has 81345 states and 92396 transitions. [2022-01-10 10:11:17,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 2 states have internal predecessors, (245), 0 states have call successors, (0), 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 10:11:17,048 INFO L276 IsEmpty]: Start isEmpty. Operand 81345 states and 92396 transitions. [2022-01-10 10:11:17,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2022-01-10 10:11:17,132 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:11:17,133 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:11:17,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-10 10:11:17,133 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:11:17,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:11:17,133 INFO L85 PathProgramCache]: Analyzing trace with hash 536303306, now seen corresponding path program 1 times [2022-01-10 10:11:17,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:11:17,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967622379] [2022-01-10 10:11:17,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:11:17,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:11:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:11:17,446 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 329 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-10 10:11:17,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:11:17,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967622379] [2022-01-10 10:11:17,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967622379] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:11:17,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:11:17,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:11:17,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649394908] [2022-01-10 10:11:17,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:11:17,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 10:11:17,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:11:17,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 10:11:17,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:11:17,448 INFO L87 Difference]: Start difference. First operand 81345 states and 92396 transitions. Second operand has 4 states, 4 states have (on average 79.5) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 10:11:19,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:11:19,610 INFO L93 Difference]: Finished difference Result 201095 states and 227137 transitions. [2022-01-10 10:11:19,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 10:11:19,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 79.5) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 391 [2022-01-10 10:11:19,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:11:19,791 INFO L225 Difference]: With dead ends: 201095 [2022-01-10 10:11:19,791 INFO L226 Difference]: Without dead ends: 119752 [2022-01-10 10:11:19,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 10:11:19,817 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 353 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-10 10:11:19,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 433 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-10 10:11:19,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119752 states. [2022-01-10 10:11:21,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119752 to 116900. [2022-01-10 10:11:21,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116900 states, 116899 states have (on average 1.112652802846902) internal successors, (130068), 116899 states have internal predecessors, (130068), 0 states have call successors, (0), 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 10:11:21,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116900 states to 116900 states and 130068 transitions. [2022-01-10 10:11:21,721 INFO L78 Accepts]: Start accepts. Automaton has 116900 states and 130068 transitions. Word has length 391 [2022-01-10 10:11:21,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:11:21,721 INFO L470 AbstractCegarLoop]: Abstraction has 116900 states and 130068 transitions. [2022-01-10 10:11:21,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.5) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 10:11:21,722 INFO L276 IsEmpty]: Start isEmpty. Operand 116900 states and 130068 transitions. [2022-01-10 10:11:21,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2022-01-10 10:11:21,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:11:21,789 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:11:21,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-10 10:11:21,789 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:11:21,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:11:21,789 INFO L85 PathProgramCache]: Analyzing trace with hash -109991714, now seen corresponding path program 1 times [2022-01-10 10:11:21,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:11:21,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72048477] [2022-01-10 10:11:21,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:11:21,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:11:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:11:22,104 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 245 proven. 0 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-01-10 10:11:22,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:11:22,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72048477] [2022-01-10 10:11:22,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72048477] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:11:22,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:11:22,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:11:22,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344105683] [2022-01-10 10:11:22,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:11:22,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 10:11:22,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:11:22,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 10:11:22,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:11:22,108 INFO L87 Difference]: Start difference. First operand 116900 states and 130068 transitions. Second operand has 4 states, 4 states have (on average 68.0) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 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 10:11:24,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:11:24,340 INFO L93 Difference]: Finished difference Result 248251 states and 275715 transitions. [2022-01-10 10:11:24,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 10:11:24,340 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 68.0) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 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 403 [2022-01-10 10:11:24,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:11:24,539 INFO L225 Difference]: With dead ends: 248251 [2022-01-10 10:11:24,539 INFO L226 Difference]: Without dead ends: 118767 [2022-01-10 10:11:24,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 10:11:24,603 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 344 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-10 10:11:24,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 118 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1071 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-10 10:11:24,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118767 states. [2022-01-10 10:11:26,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118767 to 111027. [2022-01-10 10:11:26,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111027 states, 111026 states have (on average 1.0784050582746383) internal successors, (119731), 111026 states have internal predecessors, (119731), 0 states have call successors, (0), 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 10:11:26,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111027 states to 111027 states and 119731 transitions. [2022-01-10 10:11:26,477 INFO L78 Accepts]: Start accepts. Automaton has 111027 states and 119731 transitions. Word has length 403 [2022-01-10 10:11:26,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:11:26,478 INFO L470 AbstractCegarLoop]: Abstraction has 111027 states and 119731 transitions. [2022-01-10 10:11:26,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.0) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 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 10:11:26,478 INFO L276 IsEmpty]: Start isEmpty. Operand 111027 states and 119731 transitions. [2022-01-10 10:11:26,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2022-01-10 10:11:26,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:11:26,520 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:11:26,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-10 10:11:26,521 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:11:26,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:11:26,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1680591069, now seen corresponding path program 1 times [2022-01-10 10:11:26,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:11:26,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853414192] [2022-01-10 10:11:26,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:11:26,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:11:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:11:27,077 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 340 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-01-10 10:11:27,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:11:27,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853414192] [2022-01-10 10:11:27,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853414192] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:11:27,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:11:27,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:11:27,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851440668] [2022-01-10 10:11:27,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:11:27,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:11:27,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:11:27,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:11:27,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:11:27,079 INFO L87 Difference]: Start difference. First operand 111027 states and 119731 transitions. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 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 10:11:28,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:11:28,480 INFO L93 Difference]: Finished difference Result 219821 states and 236720 transitions. [2022-01-10 10:11:28,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:11:28,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 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 421 [2022-01-10 10:11:28,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:11:28,647 INFO L225 Difference]: With dead ends: 219821 [2022-01-10 10:11:28,647 INFO L226 Difference]: Without dead ends: 105954 [2022-01-10 10:11:28,704 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 10:11:28,704 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 209 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 10:11:28,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 290 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 10:11:28,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105954 states.