/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_NONE.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 21:52:11,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 21:52:11,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 21:52:12,035 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 21:52:12,036 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 21:52:12,038 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 21:52:12,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 21:52:12,044 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 21:52:12,045 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 21:52:12,049 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 21:52:12,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 21:52:12,050 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 21:52:12,050 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 21:52:12,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 21:52:12,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 21:52:12,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 21:52:12,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 21:52:12,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 21:52:12,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 21:52:12,055 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 21:52:12,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 21:52:12,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 21:52:12,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 21:52:12,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 21:52:12,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 21:52:12,066 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 21:52:12,066 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 21:52:12,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 21:52:12,068 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 21:52:12,068 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 21:52:12,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 21:52:12,069 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 21:52:12,070 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 21:52:12,070 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 21:52:12,071 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 21:52:12,071 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 21:52:12,072 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 21:52:12,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 21:52:12,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 21:52:12,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 21:52:12,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 21:52:12,074 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-10 21:52:12,097 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 21:52:12,097 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 21:52:12,098 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 21:52:12,098 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 21:52:12,098 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 21:52:12,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 21:52:12,099 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 21:52:12,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 21:52:12,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 21:52:12,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 21:52:12,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 21:52:12,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 21:52:12,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 21:52:12,101 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 21:52:12,101 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 21:52:12,101 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 21:52:12,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 21:52:12,101 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 21:52:12,101 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 21:52:12,101 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 21:52:12,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 21:52:12,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:52:12,102 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 21:52:12,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 21:52:12,102 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 21:52:12,102 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 21:52:12,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 21:52:12,102 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 21:52:12,103 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 21:52:12,103 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 21:52:12,103 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 21:52:12,103 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 21:52:12,104 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 21:52:12,104 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 21:52:12,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 21:52:12,298 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 21:52:12,300 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 21:52:12,300 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 21:52:12,302 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 21:52:12,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label50.c [2022-01-10 21:52:12,350 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/454f7ebd1/73c57edd5da24b588333e22a7961c137/FLAG732584531 [2022-01-10 21:52:12,842 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 21:52:12,842 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label50.c [2022-01-10 21:52:12,858 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/454f7ebd1/73c57edd5da24b588333e22a7961c137/FLAG732584531 [2022-01-10 21:52:12,873 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/454f7ebd1/73c57edd5da24b588333e22a7961c137 [2022-01-10 21:52:12,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 21:52:12,877 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 21:52:12,878 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 21:52:12,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 21:52:12,880 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 21:52:12,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:52:12" (1/1) ... [2022-01-10 21:52:12,881 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d4004d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:52:12, skipping insertion in model container [2022-01-10 21:52:12,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:52:12" (1/1) ... [2022-01-10 21:52:12,886 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 21:52:12,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 21:52:13,281 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_label50.c[55003,55016] [2022-01-10 21:52:13,309 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:52:13,319 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 21:52:13,445 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_label50.c[55003,55016] [2022-01-10 21:52:13,457 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:52:13,472 INFO L208 MainTranslator]: Completed translation [2022-01-10 21:52:13,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:52:13 WrapperNode [2022-01-10 21:52:13,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 21:52:13,473 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 21:52:13,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 21:52:13,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 21:52:13,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:52:13" (1/1) ... [2022-01-10 21:52:13,504 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:52:13" (1/1) ... [2022-01-10 21:52:13,600 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1769 [2022-01-10 21:52:13,600 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 21:52:13,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 21:52:13,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 21:52:13,601 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 21:52:13,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:52:13" (1/1) ... [2022-01-10 21:52:13,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:52:13" (1/1) ... [2022-01-10 21:52:13,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:52:13" (1/1) ... [2022-01-10 21:52:13,619 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:52:13" (1/1) ... [2022-01-10 21:52:13,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:52:13" (1/1) ... [2022-01-10 21:52:13,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:52:13" (1/1) ... [2022-01-10 21:52:13,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:52:13" (1/1) ... [2022-01-10 21:52:13,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 21:52:13,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 21:52:13,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 21:52:13,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 21:52:13,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:52:13" (1/1) ... [2022-01-10 21:52:13,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:52:13,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:52:13,718 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 21:52:13,725 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 21:52:13,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 21:52:13,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 21:52:13,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 21:52:13,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 21:52:13,845 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 21:52:13,846 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 21:52:15,292 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 21:52:15,299 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 21:52:15,300 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 21:52:15,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:52:15 BoogieIcfgContainer [2022-01-10 21:52:15,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 21:52:15,302 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 21:52:15,302 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 21:52:15,307 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 21:52:15,309 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:52:15" (1/1) ... [2022-01-10 21:52:15,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:52:15 BasicIcfg [2022-01-10 21:52:15,586 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 21:52:15,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 21:52:15,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 21:52:15,590 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 21:52:15,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 09:52:12" (1/4) ... [2022-01-10 21:52:15,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37978ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:52:15, skipping insertion in model container [2022-01-10 21:52:15,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:52:13" (2/4) ... [2022-01-10 21:52:15,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37978ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:52:15, skipping insertion in model container [2022-01-10 21:52:15,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:52:15" (3/4) ... [2022-01-10 21:52:15,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37978ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 09:52:15, skipping insertion in model container [2022-01-10 21:52:15,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:52:15" (4/4) ... [2022-01-10 21:52:15,592 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label50.cTransformedIcfg [2022-01-10 21:52:15,596 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 21:52:15,596 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 21:52:15,641 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 21:52:15,645 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 21:52:15,646 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 21:52:15,667 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 21:52:15,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-01-10 21:52:15,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:15,680 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] [2022-01-10 21:52:15,680 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:15,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:15,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1227700695, now seen corresponding path program 1 times [2022-01-10 21:52:15,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:15,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810118727] [2022-01-10 21:52:15,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:15,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:16,249 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 21:52:16,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:16,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810118727] [2022-01-10 21:52:16,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810118727] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:16,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:16,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:52:16,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411770130] [2022-01-10 21:52:16,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:16,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:52:16,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:16,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:52:16,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:52:16,279 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 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 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 21:52:17,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:17,473 INFO L93 Difference]: Finished difference Result 829 states and 1478 transitions. [2022-01-10 21:52:17,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:52:17,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 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 154 [2022-01-10 21:52:17,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:17,484 INFO L225 Difference]: With dead ends: 829 [2022-01-10 21:52:17,484 INFO L226 Difference]: Without dead ends: 463 [2022-01-10 21:52:17,487 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 21:52:17,489 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 137 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:17,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 129 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 21:52:17,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-01-10 21:52:17,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 449. [2022-01-10 21:52:17,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.6183035714285714) internal successors, (725), 448 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 21:52:17,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 725 transitions. [2022-01-10 21:52:17,532 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 725 transitions. Word has length 154 [2022-01-10 21:52:17,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:17,533 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 725 transitions. [2022-01-10 21:52:17,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 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 21:52:17,533 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 725 transitions. [2022-01-10 21:52:17,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-10 21:52:17,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:17,536 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] [2022-01-10 21:52:17,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 21:52:17,536 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:17,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:17,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1625164671, now seen corresponding path program 1 times [2022-01-10 21:52:17,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:17,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334275509] [2022-01-10 21:52:17,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:17,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:17,650 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 21:52:17,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:17,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334275509] [2022-01-10 21:52:17,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334275509] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:17,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:17,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:52:17,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119171110] [2022-01-10 21:52:17,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:17,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:52:17,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:17,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:52:17,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:52:17,653 INFO L87 Difference]: Start difference. First operand 449 states and 725 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 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 21:52:18,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:18,016 INFO L93 Difference]: Finished difference Result 1333 states and 2157 transitions. [2022-01-10 21:52:18,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:52:18,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 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 159 [2022-01-10 21:52:18,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:18,019 INFO L225 Difference]: With dead ends: 1333 [2022-01-10 21:52:18,019 INFO L226 Difference]: Without dead ends: 886 [2022-01-10 21:52:18,021 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 21:52:18,022 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 360 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:18,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 555 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 21:52:18,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-01-10 21:52:18,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 884. [2022-01-10 21:52:18,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 1.6149490373725934) internal successors, (1426), 883 states have internal predecessors, (1426), 0 states have call successors, (0), 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 21:52:18,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1426 transitions. [2022-01-10 21:52:18,046 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1426 transitions. Word has length 159 [2022-01-10 21:52:18,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:18,046 INFO L470 AbstractCegarLoop]: Abstraction has 884 states and 1426 transitions. [2022-01-10 21:52:18,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 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 21:52:18,046 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1426 transitions. [2022-01-10 21:52:18,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-10 21:52:18,049 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:18,050 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 21:52:18,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 21:52:18,050 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:18,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:18,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1759980993, now seen corresponding path program 1 times [2022-01-10 21:52:18,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:18,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797046561] [2022-01-10 21:52:18,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:18,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:52:18,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:18,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797046561] [2022-01-10 21:52:18,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797046561] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:18,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:18,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:52:18,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003275020] [2022-01-10 21:52:18,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:18,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:52:18,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:18,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:52:18,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:52:18,282 INFO L87 Difference]: Start difference. First operand 884 states and 1426 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 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 21:52:19,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:19,177 INFO L93 Difference]: Finished difference Result 2599 states and 4206 transitions. [2022-01-10 21:52:19,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:52:19,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 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 161 [2022-01-10 21:52:19,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:19,183 INFO L225 Difference]: With dead ends: 2599 [2022-01-10 21:52:19,183 INFO L226 Difference]: Without dead ends: 1717 [2022-01-10 21:52:19,184 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 21:52:19,185 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 101 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:19,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 147 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:52:19,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2022-01-10 21:52:19,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1714. [2022-01-10 21:52:19,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 1.5107997664915354) internal successors, (2588), 1713 states have internal predecessors, (2588), 0 states have call successors, (0), 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 21:52:19,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 2588 transitions. [2022-01-10 21:52:19,209 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 2588 transitions. Word has length 161 [2022-01-10 21:52:19,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:19,209 INFO L470 AbstractCegarLoop]: Abstraction has 1714 states and 2588 transitions. [2022-01-10 21:52:19,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 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 21:52:19,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 2588 transitions. [2022-01-10 21:52:19,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-01-10 21:52:19,214 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:19,214 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 21:52:19,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 21:52:19,214 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:19,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:19,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1592490323, now seen corresponding path program 1 times [2022-01-10 21:52:19,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:19,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916831230] [2022-01-10 21:52:19,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:19,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:52:19,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:19,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916831230] [2022-01-10 21:52:19,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916831230] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:19,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:19,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:52:19,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605812917] [2022-01-10 21:52:19,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:19,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:52:19,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:19,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:52:19,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:52:19,319 INFO L87 Difference]: Start difference. First operand 1714 states and 2588 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 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 21:52:20,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:20,192 INFO L93 Difference]: Finished difference Result 5056 states and 7651 transitions. [2022-01-10 21:52:20,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:52:20,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 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 177 [2022-01-10 21:52:20,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:20,202 INFO L225 Difference]: With dead ends: 5056 [2022-01-10 21:52:20,202 INFO L226 Difference]: Without dead ends: 3344 [2022-01-10 21:52:20,204 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 21:52:20,205 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 223 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:20,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 167 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:52:20,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3344 states. [2022-01-10 21:52:20,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3344 to 3341. [2022-01-10 21:52:20,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3341 states, 3340 states have (on average 1.3637724550898203) internal successors, (4555), 3340 states have internal predecessors, (4555), 0 states have call successors, (0), 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 21:52:20,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3341 states to 3341 states and 4555 transitions. [2022-01-10 21:52:20,253 INFO L78 Accepts]: Start accepts. Automaton has 3341 states and 4555 transitions. Word has length 177 [2022-01-10 21:52:20,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:20,253 INFO L470 AbstractCegarLoop]: Abstraction has 3341 states and 4555 transitions. [2022-01-10 21:52:20,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 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 21:52:20,254 INFO L276 IsEmpty]: Start isEmpty. Operand 3341 states and 4555 transitions. [2022-01-10 21:52:20,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-01-10 21:52:20,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:20,258 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:52:20,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 21:52:20,258 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:20,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:20,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1369673178, now seen corresponding path program 1 times [2022-01-10 21:52:20,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:20,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522084565] [2022-01-10 21:52:20,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:20,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:20,357 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 21:52:20,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:20,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522084565] [2022-01-10 21:52:20,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522084565] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:20,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:20,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:52:20,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729867276] [2022-01-10 21:52:20,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:20,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:52:20,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:20,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:52:20,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:52:20,359 INFO L87 Difference]: Start difference. First operand 3341 states and 4555 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 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 21:52:20,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:20,798 INFO L93 Difference]: Finished difference Result 6629 states and 9039 transitions. [2022-01-10 21:52:20,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:52:20,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 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 189 [2022-01-10 21:52:20,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:20,806 INFO L225 Difference]: With dead ends: 6629 [2022-01-10 21:52:20,806 INFO L226 Difference]: Without dead ends: 3290 [2022-01-10 21:52:20,809 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 21:52:20,810 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 321 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 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, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:20,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 21:52:20,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3290 states. [2022-01-10 21:52:20,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3290 to 3290. [2022-01-10 21:52:20,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3290 states, 3289 states have (on average 1.3201581027667983) internal successors, (4342), 3289 states have internal predecessors, (4342), 0 states have call successors, (0), 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 21:52:20,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3290 states to 3290 states and 4342 transitions. [2022-01-10 21:52:20,856 INFO L78 Accepts]: Start accepts. Automaton has 3290 states and 4342 transitions. Word has length 189 [2022-01-10 21:52:20,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:20,857 INFO L470 AbstractCegarLoop]: Abstraction has 3290 states and 4342 transitions. [2022-01-10 21:52:20,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 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 21:52:20,857 INFO L276 IsEmpty]: Start isEmpty. Operand 3290 states and 4342 transitions. [2022-01-10 21:52:20,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-10 21:52:20,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:20,863 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:52:20,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 21:52:20,863 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:20,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:20,863 INFO L85 PathProgramCache]: Analyzing trace with hash -460791860, now seen corresponding path program 1 times [2022-01-10 21:52:20,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:20,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574545090] [2022-01-10 21:52:20,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:20,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:20,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:20,998 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:52:20,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:20,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574545090] [2022-01-10 21:52:20,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574545090] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:20,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:20,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:52:20,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019617191] [2022-01-10 21:52:20,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:21,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:52:21,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:21,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:52:21,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:52:21,000 INFO L87 Difference]: Start difference. First operand 3290 states and 4342 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 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 21:52:21,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:21,833 INFO L93 Difference]: Finished difference Result 9829 states and 12976 transitions. [2022-01-10 21:52:21,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:52:21,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 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 191 [2022-01-10 21:52:21,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:21,848 INFO L225 Difference]: With dead ends: 9829 [2022-01-10 21:52:21,849 INFO L226 Difference]: Without dead ends: 6541 [2022-01-10 21:52:21,853 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 21:52:21,853 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 203 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:21,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 133 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:52:21,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6541 states. [2022-01-10 21:52:21,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6541 to 6539. [2022-01-10 21:52:21,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6539 states, 6538 states have (on average 1.283420006118079) internal successors, (8391), 6538 states have internal predecessors, (8391), 0 states have call successors, (0), 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 21:52:21,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6539 states to 6539 states and 8391 transitions. [2022-01-10 21:52:21,940 INFO L78 Accepts]: Start accepts. Automaton has 6539 states and 8391 transitions. Word has length 191 [2022-01-10 21:52:21,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:21,940 INFO L470 AbstractCegarLoop]: Abstraction has 6539 states and 8391 transitions. [2022-01-10 21:52:21,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 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 21:52:21,940 INFO L276 IsEmpty]: Start isEmpty. Operand 6539 states and 8391 transitions. [2022-01-10 21:52:21,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-10 21:52:21,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:21,944 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] [2022-01-10 21:52:21,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 21:52:21,944 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:21,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:21,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1106782397, now seen corresponding path program 1 times [2022-01-10 21:52:21,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:21,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208571721] [2022-01-10 21:52:21,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:21,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:22,043 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 21:52:22,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:22,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208571721] [2022-01-10 21:52:22,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208571721] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:22,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:22,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:52:22,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411972448] [2022-01-10 21:52:22,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:22,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:52:22,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:22,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:52:22,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:52:22,045 INFO L87 Difference]: Start difference. First operand 6539 states and 8391 transitions. Second operand has 4 states, 4 states have (on average 48.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 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 21:52:23,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:23,262 INFO L93 Difference]: Finished difference Result 21450 states and 27623 transitions. [2022-01-10 21:52:23,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:52:23,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 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 192 [2022-01-10 21:52:23,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:23,306 INFO L225 Difference]: With dead ends: 21450 [2022-01-10 21:52:23,306 INFO L226 Difference]: Without dead ends: 14913 [2022-01-10 21:52:23,313 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 21:52:23,315 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 523 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:23,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 484 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 21:52:23,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14913 states. [2022-01-10 21:52:23,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14913 to 14898. [2022-01-10 21:52:23,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14898 states, 14897 states have (on average 1.2750889440827011) internal successors, (18995), 14897 states have internal predecessors, (18995), 0 states have call successors, (0), 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 21:52:23,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14898 states to 14898 states and 18995 transitions. [2022-01-10 21:52:23,555 INFO L78 Accepts]: Start accepts. Automaton has 14898 states and 18995 transitions. Word has length 192 [2022-01-10 21:52:23,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:23,555 INFO L470 AbstractCegarLoop]: Abstraction has 14898 states and 18995 transitions. [2022-01-10 21:52:23,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 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 21:52:23,556 INFO L276 IsEmpty]: Start isEmpty. Operand 14898 states and 18995 transitions. [2022-01-10 21:52:23,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-10 21:52:23,560 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:23,560 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 21:52:23,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 21:52:23,561 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:23,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:23,561 INFO L85 PathProgramCache]: Analyzing trace with hash -141039046, now seen corresponding path program 1 times [2022-01-10 21:52:23,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:23,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289958941] [2022-01-10 21:52:23,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:23,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:52:23,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:23,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289958941] [2022-01-10 21:52:23,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289958941] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:23,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:23,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:52:23,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852683639] [2022-01-10 21:52:23,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:23,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:52:23,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:23,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:52:23,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:52:23,697 INFO L87 Difference]: Start difference. First operand 14898 states and 18995 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 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 21:52:24,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:24,615 INFO L93 Difference]: Finished difference Result 35509 states and 44938 transitions. [2022-01-10 21:52:24,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:52:24,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 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 195 [2022-01-10 21:52:24,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:24,645 INFO L225 Difference]: With dead ends: 35509 [2022-01-10 21:52:24,646 INFO L226 Difference]: Without dead ends: 20613 [2022-01-10 21:52:24,684 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 21:52:24,685 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 196 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:24,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 69 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:52:24,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20613 states. [2022-01-10 21:52:24,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20613 to 20609. [2022-01-10 21:52:24,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20609 states, 20608 states have (on average 1.2492721273291925) internal successors, (25745), 20608 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 21:52:24,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20609 states to 20609 states and 25745 transitions. [2022-01-10 21:52:24,994 INFO L78 Accepts]: Start accepts. Automaton has 20609 states and 25745 transitions. Word has length 195 [2022-01-10 21:52:24,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:24,996 INFO L470 AbstractCegarLoop]: Abstraction has 20609 states and 25745 transitions. [2022-01-10 21:52:24,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 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 21:52:24,996 INFO L276 IsEmpty]: Start isEmpty. Operand 20609 states and 25745 transitions. [2022-01-10 21:52:25,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-01-10 21:52:25,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:25,002 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:52:25,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 21:52:25,002 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:25,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:25,003 INFO L85 PathProgramCache]: Analyzing trace with hash 649389778, now seen corresponding path program 1 times [2022-01-10 21:52:25,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:25,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265409706] [2022-01-10 21:52:25,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:25,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:52:25,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:25,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265409706] [2022-01-10 21:52:25,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265409706] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:52:25,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588093248] [2022-01-10 21:52:25,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:25,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:52:25,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:52:25,158 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:52:25,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 21:52:25,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:25,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 6117 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 21:52:25,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:52:26,062 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 21:52:26,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:52:26,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588093248] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:26,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 21:52:26,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 21:52:26,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813058974] [2022-01-10 21:52:26,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:26,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:52:26,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:26,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:52:26,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:52:26,064 INFO L87 Difference]: Start difference. First operand 20609 states and 25745 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 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 21:52:26,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:26,965 INFO L93 Difference]: Finished difference Result 41220 states and 51496 transitions. [2022-01-10 21:52:26,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:52:26,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 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 202 [2022-01-10 21:52:26,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:26,998 INFO L225 Difference]: With dead ends: 41220 [2022-01-10 21:52:26,998 INFO L226 Difference]: Without dead ends: 20613 [2022-01-10 21:52:27,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:52:27,016 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 106 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:27,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 333 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:52:27,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20613 states. [2022-01-10 21:52:27,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20613 to 20609. [2022-01-10 21:52:27,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20609 states, 20608 states have (on average 1.1870632763975155) internal successors, (24463), 20608 states have internal predecessors, (24463), 0 states have call successors, (0), 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 21:52:27,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20609 states to 20609 states and 24463 transitions. [2022-01-10 21:52:27,260 INFO L78 Accepts]: Start accepts. Automaton has 20609 states and 24463 transitions. Word has length 202 [2022-01-10 21:52:27,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:27,261 INFO L470 AbstractCegarLoop]: Abstraction has 20609 states and 24463 transitions. [2022-01-10 21:52:27,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 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 21:52:27,261 INFO L276 IsEmpty]: Start isEmpty. Operand 20609 states and 24463 transitions. [2022-01-10 21:52:27,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-01-10 21:52:27,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:27,268 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 21:52:27,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 21:52:27,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:52:27,486 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:27,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:27,486 INFO L85 PathProgramCache]: Analyzing trace with hash -246008881, now seen corresponding path program 1 times [2022-01-10 21:52:27,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:27,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006410491] [2022-01-10 21:52:27,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:27,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:52:27,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:27,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006410491] [2022-01-10 21:52:27,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006410491] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:27,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:27,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:52:27,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794882338] [2022-01-10 21:52:27,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:27,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:52:27,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:27,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:52:27,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:52:27,801 INFO L87 Difference]: Start difference. First operand 20609 states and 24463 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 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 21:52:28,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:28,802 INFO L93 Difference]: Finished difference Result 55861 states and 66078 transitions. [2022-01-10 21:52:28,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:52:28,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 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 228 [2022-01-10 21:52:28,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:28,850 INFO L225 Difference]: With dead ends: 55861 [2022-01-10 21:52:28,850 INFO L226 Difference]: Without dead ends: 35254 [2022-01-10 21:52:28,862 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 21:52:28,863 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 103 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:28,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 88 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:52:28,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35254 states. [2022-01-10 21:52:29,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35254 to 35246. [2022-01-10 21:52:29,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35246 states, 35245 states have (on average 1.1581784650305007) internal successors, (40820), 35245 states have internal predecessors, (40820), 0 states have call successors, (0), 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 21:52:29,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35246 states to 35246 states and 40820 transitions. [2022-01-10 21:52:29,237 INFO L78 Accepts]: Start accepts. Automaton has 35246 states and 40820 transitions. Word has length 228 [2022-01-10 21:52:29,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:29,237 INFO L470 AbstractCegarLoop]: Abstraction has 35246 states and 40820 transitions. [2022-01-10 21:52:29,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 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 21:52:29,238 INFO L276 IsEmpty]: Start isEmpty. Operand 35246 states and 40820 transitions. [2022-01-10 21:52:29,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-01-10 21:52:29,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:29,260 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 21:52:29,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 21:52:29,261 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:29,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:29,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1359875939, now seen corresponding path program 1 times [2022-01-10 21:52:29,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:29,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490126704] [2022-01-10 21:52:29,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:29,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2022-01-10 21:52:29,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:29,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490126704] [2022-01-10 21:52:29,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490126704] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:29,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:29,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:52:29,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026031920] [2022-01-10 21:52:29,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:29,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:52:29,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:29,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:52:29,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:52:29,484 INFO L87 Difference]: Start difference. First operand 35246 states and 40820 transitions. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 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 21:52:30,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:30,753 INFO L93 Difference]: Finished difference Result 73338 states and 84716 transitions. [2022-01-10 21:52:30,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:52:30,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 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 334 [2022-01-10 21:52:30,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:30,796 INFO L225 Difference]: With dead ends: 73338 [2022-01-10 21:52:30,796 INFO L226 Difference]: Without dead ends: 38094 [2022-01-10 21:52:30,819 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 21:52:30,820 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 619 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:30,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [619 Valid, 141 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 21:52:30,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38094 states. [2022-01-10 21:52:31,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38094 to 35652. [2022-01-10 21:52:31,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35652 states, 35651 states have (on average 1.1534038315895767) internal successors, (41120), 35651 states have internal predecessors, (41120), 0 states have call successors, (0), 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 21:52:31,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35652 states to 35652 states and 41120 transitions. [2022-01-10 21:52:31,328 INFO L78 Accepts]: Start accepts. Automaton has 35652 states and 41120 transitions. Word has length 334 [2022-01-10 21:52:31,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:31,328 INFO L470 AbstractCegarLoop]: Abstraction has 35652 states and 41120 transitions. [2022-01-10 21:52:31,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 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 21:52:31,328 INFO L276 IsEmpty]: Start isEmpty. Operand 35652 states and 41120 transitions. [2022-01-10 21:52:31,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-01-10 21:52:31,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:31,349 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:52:31,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 21:52:31,349 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:31,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:31,349 INFO L85 PathProgramCache]: Analyzing trace with hash -985974513, now seen corresponding path program 1 times [2022-01-10 21:52:31,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:31,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296809277] [2022-01-10 21:52:31,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:31,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:31,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 235 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-01-10 21:52:31,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:31,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296809277] [2022-01-10 21:52:31,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296809277] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:31,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:31,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:52:31,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315196559] [2022-01-10 21:52:31,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:31,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:52:31,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:31,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:52:31,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:52:31,518 INFO L87 Difference]: Start difference. First operand 35652 states and 41120 transitions. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 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 21:52:32,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:32,423 INFO L93 Difference]: Finished difference Result 70492 states and 81254 transitions. [2022-01-10 21:52:32,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:52:32,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 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 338 [2022-01-10 21:52:32,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:32,460 INFO L225 Difference]: With dead ends: 70492 [2022-01-10 21:52:32,460 INFO L226 Difference]: Without dead ends: 34842 [2022-01-10 21:52:32,483 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 21:52:32,483 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 224 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:32,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 312 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 21:52:32,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34842 states. [2022-01-10 21:52:32,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34842 to 34430. [2022-01-10 21:52:32,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34430 states, 34429 states have (on average 1.1178947979900664) internal successors, (38488), 34429 states have internal predecessors, (38488), 0 states have call successors, (0), 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 21:52:32,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34430 states to 34430 states and 38488 transitions. [2022-01-10 21:52:32,945 INFO L78 Accepts]: Start accepts. Automaton has 34430 states and 38488 transitions. Word has length 338 [2022-01-10 21:52:32,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:32,946 INFO L470 AbstractCegarLoop]: Abstraction has 34430 states and 38488 transitions. [2022-01-10 21:52:32,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 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 21:52:32,946 INFO L276 IsEmpty]: Start isEmpty. Operand 34430 states and 38488 transitions. [2022-01-10 21:52:32,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2022-01-10 21:52:32,966 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:32,967 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, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2022-01-10 21:52:32,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 21:52:32,967 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:32,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:32,967 INFO L85 PathProgramCache]: Analyzing trace with hash 753112853, now seen corresponding path program 1 times [2022-01-10 21:52:32,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:32,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973465522] [2022-01-10 21:52:32,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:32,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-01-10 21:52:33,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:33,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973465522] [2022-01-10 21:52:33,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973465522] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:33,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:33,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:52:33,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761042551] [2022-01-10 21:52:33,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:33,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:52:33,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:33,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:52:33,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:52:33,167 INFO L87 Difference]: Start difference. First operand 34430 states and 38488 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 2 states have internal predecessors, (231), 0 states have call successors, (0), 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 21:52:34,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:34,115 INFO L93 Difference]: Finished difference Result 83918 states and 93917 transitions. [2022-01-10 21:52:34,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:52:34,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 2 states have internal predecessors, (231), 0 states have call successors, (0), 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 353 [2022-01-10 21:52:34,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:34,173 INFO L225 Difference]: With dead ends: 83918 [2022-01-10 21:52:34,173 INFO L226 Difference]: Without dead ends: 49490 [2022-01-10 21:52:34,197 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 21:52:34,198 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 156 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:34,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 162 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:52:34,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49490 states. [2022-01-10 21:52:34,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49490 to 40520. [2022-01-10 21:52:34,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40520 states, 40519 states have (on average 1.1189071793479601) internal successors, (45337), 40519 states have internal predecessors, (45337), 0 states have call successors, (0), 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 21:52:34,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40520 states to 40520 states and 45337 transitions. [2022-01-10 21:52:34,745 INFO L78 Accepts]: Start accepts. Automaton has 40520 states and 45337 transitions. Word has length 353 [2022-01-10 21:52:34,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:34,746 INFO L470 AbstractCegarLoop]: Abstraction has 40520 states and 45337 transitions. [2022-01-10 21:52:34,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 2 states have internal predecessors, (231), 0 states have call successors, (0), 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 21:52:34,746 INFO L276 IsEmpty]: Start isEmpty. Operand 40520 states and 45337 transitions. [2022-01-10 21:52:34,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2022-01-10 21:52:34,763 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:34,763 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-01-10 21:52:34,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 21:52:34,763 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:34,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:34,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1130171185, now seen corresponding path program 1 times [2022-01-10 21:52:34,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:34,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573196466] [2022-01-10 21:52:34,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:34,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:34,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:35,171 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 309 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-01-10 21:52:35,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:35,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573196466] [2022-01-10 21:52:35,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573196466] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:35,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:35,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:52:35,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102731470] [2022-01-10 21:52:35,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:35,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:52:35,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:35,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:52:35,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:52:35,173 INFO L87 Difference]: Start difference. First operand 40520 states and 45337 transitions. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 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 21:52:36,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:36,234 INFO L93 Difference]: Finished difference Result 88992 states and 99474 transitions. [2022-01-10 21:52:36,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:52:36,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 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 372 [2022-01-10 21:52:36,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:36,285 INFO L225 Difference]: With dead ends: 88992 [2022-01-10 21:52:36,285 INFO L226 Difference]: Without dead ends: 48474 [2022-01-10 21:52:36,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 21:52:36,309 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 181 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:36,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 341 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:52:36,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48474 states. [2022-01-10 21:52:36,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48474 to 46234. [2022-01-10 21:52:36,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46234 states, 46233 states have (on average 1.1202604200462873) internal successors, (51793), 46233 states have internal predecessors, (51793), 0 states have call successors, (0), 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 21:52:36,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46234 states to 46234 states and 51793 transitions. [2022-01-10 21:52:36,802 INFO L78 Accepts]: Start accepts. Automaton has 46234 states and 51793 transitions. Word has length 372 [2022-01-10 21:52:36,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:36,802 INFO L470 AbstractCegarLoop]: Abstraction has 46234 states and 51793 transitions. [2022-01-10 21:52:36,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 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 21:52:36,803 INFO L276 IsEmpty]: Start isEmpty. Operand 46234 states and 51793 transitions. [2022-01-10 21:52:36,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-01-10 21:52:36,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:36,822 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-01-10 21:52:36,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-10 21:52:36,822 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:36,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:36,822 INFO L85 PathProgramCache]: Analyzing trace with hash 290625302, now seen corresponding path program 1 times [2022-01-10 21:52:36,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:36,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524413747] [2022-01-10 21:52:36,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:36,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:37,192 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 290 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-01-10 21:52:37,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:37,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524413747] [2022-01-10 21:52:37,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524413747] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:37,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:37,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:52:37,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660023008] [2022-01-10 21:52:37,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:37,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:52:37,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:37,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:52:37,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:52:37,195 INFO L87 Difference]: Start difference. First operand 46234 states and 51793 transitions. Second operand has 4 states, 4 states have (on average 77.5) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 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 21:52:38,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:38,388 INFO L93 Difference]: Finished difference Result 94304 states and 105542 transitions. [2022-01-10 21:52:38,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:52:38,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 77.5) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 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 375 [2022-01-10 21:52:38,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:38,443 INFO L225 Difference]: With dead ends: 94304 [2022-01-10 21:52:38,443 INFO L226 Difference]: Without dead ends: 48072 [2022-01-10 21:52:38,475 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 21:52:38,475 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 422 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:38,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 462 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 21:52:38,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48072 states. [2022-01-10 21:52:38,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48072 to 48059. [2022-01-10 21:52:38,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48059 states, 48058 states have (on average 1.1083690540596778) internal successors, (53266), 48058 states have internal predecessors, (53266), 0 states have call successors, (0), 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 21:52:39,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48059 states to 48059 states and 53266 transitions. [2022-01-10 21:52:39,049 INFO L78 Accepts]: Start accepts. Automaton has 48059 states and 53266 transitions. Word has length 375 [2022-01-10 21:52:39,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:39,049 INFO L470 AbstractCegarLoop]: Abstraction has 48059 states and 53266 transitions. [2022-01-10 21:52:39,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.5) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 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 21:52:39,049 INFO L276 IsEmpty]: Start isEmpty. Operand 48059 states and 53266 transitions. [2022-01-10 21:52:39,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2022-01-10 21:52:39,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:39,236 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 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, 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] [2022-01-10 21:52:39,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-10 21:52:39,236 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:39,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:39,237 INFO L85 PathProgramCache]: Analyzing trace with hash 426952297, now seen corresponding path program 1 times [2022-01-10 21:52:39,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:39,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752764697] [2022-01-10 21:52:39,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:39,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:39,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-01-10 21:52:39,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:39,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752764697] [2022-01-10 21:52:39,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752764697] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:39,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:39,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:52:39,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848256884] [2022-01-10 21:52:39,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:39,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:52:39,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:39,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:52:39,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:52:39,393 INFO L87 Difference]: Start difference. First operand 48059 states and 53266 transitions. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 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 21:52:41,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:41,163 INFO L93 Difference]: Finished difference Result 171609 states and 189866 transitions. [2022-01-10 21:52:41,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:52:41,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 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 380 [2022-01-10 21:52:41,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:41,317 INFO L225 Difference]: With dead ends: 171609 [2022-01-10 21:52:41,318 INFO L226 Difference]: Without dead ends: 123552 [2022-01-10 21:52:41,484 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 21:52:41,490 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 861 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:41,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 69 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-10 21:52:41,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123552 states. [2022-01-10 21:52:42,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123552 to 123548. [2022-01-10 21:52:42,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123548 states, 123547 states have (on average 1.1043084817923543) internal successors, (136434), 123547 states have internal predecessors, (136434), 0 states have call successors, (0), 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 21:52:43,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123548 states to 123548 states and 136434 transitions. [2022-01-10 21:52:43,126 INFO L78 Accepts]: Start accepts. Automaton has 123548 states and 136434 transitions. Word has length 380 [2022-01-10 21:52:43,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:43,126 INFO L470 AbstractCegarLoop]: Abstraction has 123548 states and 136434 transitions. [2022-01-10 21:52:43,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 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 21:52:43,126 INFO L276 IsEmpty]: Start isEmpty. Operand 123548 states and 136434 transitions. [2022-01-10 21:52:43,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2022-01-10 21:52:43,152 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:43,152 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:52:43,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-10 21:52:43,152 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:43,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:43,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2040968702, now seen corresponding path program 1 times [2022-01-10 21:52:43,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:43,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053281035] [2022-01-10 21:52:43,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:43,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 232 proven. 0 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-01-10 21:52:43,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:43,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053281035] [2022-01-10 21:52:43,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053281035] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:43,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:43,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:52:43,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073005205] [2022-01-10 21:52:43,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:43,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:52:43,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:43,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:52:43,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:52:43,340 INFO L87 Difference]: Start difference. First operand 123548 states and 136434 transitions. Second operand has 4 states, 4 states have (on average 64.5) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 21:52:45,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:45,337 INFO L93 Difference]: Finished difference Result 257115 states and 284010 transitions. [2022-01-10 21:52:45,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:52:45,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 64.5) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 380 [2022-01-10 21:52:45,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:45,524 INFO L225 Difference]: With dead ends: 257115 [2022-01-10 21:52:45,524 INFO L226 Difference]: Without dead ends: 133569 [2022-01-10 21:52:45,591 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 21:52:45,592 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 343 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:45,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 84 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-10 21:52:45,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133569 states. [2022-01-10 21:52:47,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133569 to 130265. [2022-01-10 21:52:47,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130265 states, 130264 states have (on average 1.0993981453049193) internal successors, (143212), 130264 states have internal predecessors, (143212), 0 states have call successors, (0), 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 21:52:47,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130265 states to 130265 states and 143212 transitions. [2022-01-10 21:52:47,490 INFO L78 Accepts]: Start accepts. Automaton has 130265 states and 143212 transitions. Word has length 380 [2022-01-10 21:52:47,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:47,490 INFO L470 AbstractCegarLoop]: Abstraction has 130265 states and 143212 transitions. [2022-01-10 21:52:47,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.5) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 21:52:47,491 INFO L276 IsEmpty]: Start isEmpty. Operand 130265 states and 143212 transitions. [2022-01-10 21:52:47,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-01-10 21:52:47,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:47,515 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2022-01-10 21:52:47,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-10 21:52:47,515 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:47,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:47,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1885418656, now seen corresponding path program 1 times [2022-01-10 21:52:47,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:47,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694954204] [2022-01-10 21:52:47,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:47,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:47,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:47,654 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-01-10 21:52:47,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:47,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694954204] [2022-01-10 21:52:47,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694954204] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:47,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:47,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:52:47,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501106884] [2022-01-10 21:52:47,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:47,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:52:47,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:47,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:52:47,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:52:47,656 INFO L87 Difference]: Start difference. First operand 130265 states and 143212 transitions. Second operand has 4 states, 4 states have (on average 48.5) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 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 21:52:49,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:49,523 INFO L93 Difference]: Finished difference Result 269270 states and 296169 transitions. [2022-01-10 21:52:49,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:52:49,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 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 386 [2022-01-10 21:52:49,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:49,719 INFO L225 Difference]: With dead ends: 269270 [2022-01-10 21:52:49,720 INFO L226 Difference]: Without dead ends: 139007 [2022-01-10 21:52:49,778 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 21:52:49,778 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 732 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:49,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [732 Valid, 314 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 21:52:49,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139007 states. [2022-01-10 21:52:51,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139007 to 138994. [2022-01-10 21:52:51,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138994 states, 138993 states have (on average 1.0997100573410172) internal successors, (152852), 138993 states have internal predecessors, (152852), 0 states have call successors, (0), 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 21:52:51,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138994 states to 138994 states and 152852 transitions. [2022-01-10 21:52:51,535 INFO L78 Accepts]: Start accepts. Automaton has 138994 states and 152852 transitions. Word has length 386 [2022-01-10 21:52:51,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:51,535 INFO L470 AbstractCegarLoop]: Abstraction has 138994 states and 152852 transitions. [2022-01-10 21:52:51,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 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 21:52:51,535 INFO L276 IsEmpty]: Start isEmpty. Operand 138994 states and 152852 transitions. [2022-01-10 21:52:51,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2022-01-10 21:52:51,561 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:51,562 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:52:51,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-10 21:52:51,562 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:51,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:51,562 INFO L85 PathProgramCache]: Analyzing trace with hash -832502311, now seen corresponding path program 1 times [2022-01-10 21:52:51,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:51,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543635829] [2022-01-10 21:52:51,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:51,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:51,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:52,041 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 393 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-01-10 21:52:52,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:52,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543635829] [2022-01-10 21:52:52,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543635829] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:52,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:52,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 21:52:52,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024923017] [2022-01-10 21:52:52,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:52,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:52:52,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:52,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:52:52,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:52:52,044 INFO L87 Difference]: Start difference. First operand 138994 states and 152852 transitions. Second operand has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 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 21:52:53,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:53,807 INFO L93 Difference]: Finished difference Result 278004 states and 305732 transitions. [2022-01-10 21:52:53,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:52:53,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 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 408 [2022-01-10 21:52:53,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:53,987 INFO L225 Difference]: With dead ends: 278004 [2022-01-10 21:52:53,987 INFO L226 Difference]: Without dead ends: 139012 [2022-01-10 21:52:54,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 21:52:54,046 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 250 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:54,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 138 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:52:54,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139012 states. [2022-01-10 21:52:55,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139012 to 138994. [2022-01-10 21:52:55,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138994 states, 138993 states have (on average 1.089723942932378) internal successors, (151464), 138993 states have internal predecessors, (151464), 0 states have call successors, (0), 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 21:52:55,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138994 states to 138994 states and 151464 transitions. [2022-01-10 21:52:55,941 INFO L78 Accepts]: Start accepts. Automaton has 138994 states and 151464 transitions. Word has length 408 [2022-01-10 21:52:55,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:55,942 INFO L470 AbstractCegarLoop]: Abstraction has 138994 states and 151464 transitions. [2022-01-10 21:52:55,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 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 21:52:55,942 INFO L276 IsEmpty]: Start isEmpty. Operand 138994 states and 151464 transitions. [2022-01-10 21:52:55,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2022-01-10 21:52:55,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:55,970 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:52:55,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-10 21:52:55,970 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:55,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:55,970 INFO L85 PathProgramCache]: Analyzing trace with hash 329650661, now seen corresponding path program 1 times [2022-01-10 21:52:55,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:55,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472794742] [2022-01-10 21:52:55,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:55,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 364 proven. 43 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-01-10 21:52:56,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:56,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472794742] [2022-01-10 21:52:56,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472794742] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:52:56,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680047864] [2022-01-10 21:52:56,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:56,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:52:56,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:52:56,498 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:52:56,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 21:52:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:57,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 12595 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 21:52:57,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:52:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-01-10 21:52:58,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:52:58,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680047864] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:58,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 21:52:58,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-01-10 21:52:58,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991582148] [2022-01-10 21:52:58,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:58,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:52:58,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:58,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:52:58,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 21:52:58,053 INFO L87 Difference]: Start difference. First operand 138994 states and 151464 transitions. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 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 21:52:59,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:59,572 INFO L93 Difference]: Finished difference Result 306226 states and 332578 transitions. [2022-01-10 21:52:59,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:52:59,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 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 415 [2022-01-10 21:52:59,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:59,792 INFO L225 Difference]: With dead ends: 306226 [2022-01-10 21:52:59,792 INFO L226 Difference]: Without dead ends: 167234 [2022-01-10 21:52:59,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 21:52:59,873 INFO L933 BasicCegarLoop]: 345 mSDtfsCounter, 65 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:59,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 367 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 21:53:00,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167234 states. [2022-01-10 21:53:01,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167234 to 158685. [2022-01-10 21:53:02,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158685 states, 158684 states have (on average 1.0823397443976708) internal successors, (171750), 158684 states have internal predecessors, (171750), 0 states have call successors, (0), 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 21:53:02,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158685 states to 158685 states and 171750 transitions. [2022-01-10 21:53:02,212 INFO L78 Accepts]: Start accepts. Automaton has 158685 states and 171750 transitions. Word has length 415 [2022-01-10 21:53:02,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:53:02,213 INFO L470 AbstractCegarLoop]: Abstraction has 158685 states and 171750 transitions. [2022-01-10 21:53:02,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 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 21:53:02,213 INFO L276 IsEmpty]: Start isEmpty. Operand 158685 states and 171750 transitions. [2022-01-10 21:53:02,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2022-01-10 21:53:02,243 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:53:02,243 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:53:02,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 21:53:02,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-01-10 21:53:02,450 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:53:02,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:53:02,451 INFO L85 PathProgramCache]: Analyzing trace with hash 426622551, now seen corresponding path program 1 times [2022-01-10 21:53:02,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:53:02,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840855739] [2022-01-10 21:53:02,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:53:02,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:53:02,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:53:02,929 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 440 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 21:53:02,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:53:02,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840855739] [2022-01-10 21:53:02,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840855739] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:53:02,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:53:02,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 21:53:02,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308786601] [2022-01-10 21:53:02,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:53:02,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:53:02,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:53:02,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:53:02,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:53:02,932 INFO L87 Difference]: Start difference. First operand 158685 states and 171750 transitions. Second operand has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 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 21:53:04,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:53:04,725 INFO L93 Difference]: Finished difference Result 255989 states and 276987 transitions. [2022-01-10 21:53:04,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:53:04,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 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 21:53:04,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:53:04,825 INFO L225 Difference]: With dead ends: 255989 [2022-01-10 21:53:04,825 INFO L226 Difference]: Without dead ends: 89998 [2022-01-10 21:53:04,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 21:53:04,889 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 325 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 21:53:04,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 89 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 21:53:04,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89998 states. [2022-01-10 21:53:05,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89998 to 77551. [2022-01-10 21:53:06,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77551 states, 77550 states have (on average 1.0593294648613798) internal successors, (82151), 77550 states have internal predecessors, (82151), 0 states have call successors, (0), 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 21:53:06,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77551 states to 77551 states and 82151 transitions. [2022-01-10 21:53:06,079 INFO L78 Accepts]: Start accepts. Automaton has 77551 states and 82151 transitions. Word has length 421 [2022-01-10 21:53:06,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:53:06,079 INFO L470 AbstractCegarLoop]: Abstraction has 77551 states and 82151 transitions. [2022-01-10 21:53:06,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 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 21:53:06,079 INFO L276 IsEmpty]: Start isEmpty. Operand 77551 states and 82151 transitions. [2022-01-10 21:53:06,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2022-01-10 21:53:06,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:53:06,097 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 21:53:06,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-10 21:53:06,098 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:53:06,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:53:06,098 INFO L85 PathProgramCache]: Analyzing trace with hash -650472557, now seen corresponding path program 1 times [2022-01-10 21:53:06,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:53:06,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527928107] [2022-01-10 21:53:06,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:53:06,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:53:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:53:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 259 proven. 0 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2022-01-10 21:53:06,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:53:06,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527928107] [2022-01-10 21:53:06,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527928107] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:53:06,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:53:06,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:53:06,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324056813] [2022-01-10 21:53:06,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:53:06,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:53:06,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:53:06,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:53:06,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:53:06,597 INFO L87 Difference]: Start difference. First operand 77551 states and 82151 transitions. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 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 21:53:07,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:53:07,598 INFO L93 Difference]: Finished difference Result 153895 states and 163029 transitions. [2022-01-10 21:53:07,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:53:07,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 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 451 [2022-01-10 21:53:07,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:53:07,691 INFO L225 Difference]: With dead ends: 153895 [2022-01-10 21:53:07,691 INFO L226 Difference]: Without dead ends: 76346 [2022-01-10 21:53:07,725 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 21:53:07,726 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 106 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 21:53:07,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 273 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 21:53:07,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76346 states. [2022-01-10 21:53:08,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76346 to 74709. [2022-01-10 21:53:08,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74709 states, 74708 states have (on average 1.0561787224929058) internal successors, (78905), 74708 states have internal predecessors, (78905), 0 states have call successors, (0), 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 21:53:08,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74709 states to 74709 states and 78905 transitions. [2022-01-10 21:53:08,787 INFO L78 Accepts]: Start accepts. Automaton has 74709 states and 78905 transitions. Word has length 451 [2022-01-10 21:53:08,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:53:08,790 INFO L470 AbstractCegarLoop]: Abstraction has 74709 states and 78905 transitions. [2022-01-10 21:53:08,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 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 21:53:08,790 INFO L276 IsEmpty]: Start isEmpty. Operand 74709 states and 78905 transitions. [2022-01-10 21:53:08,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2022-01-10 21:53:08,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:53:08,809 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 21:53:08,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-10 21:53:08,809 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:53:08,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:53:08,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1650645736, now seen corresponding path program 1 times [2022-01-10 21:53:08,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:53:08,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281058993] [2022-01-10 21:53:08,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:53:08,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:53:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:53:09,251 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 510 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-01-10 21:53:09,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:53:09,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281058993] [2022-01-10 21:53:09,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281058993] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:53:09,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:53:09,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 21:53:09,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656350564] [2022-01-10 21:53:09,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:53:09,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:53:09,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:53:09,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:53:09,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:53:09,260 INFO L87 Difference]: Start difference. First operand 74709 states and 78905 transitions. Second operand has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)