/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 12:56:20,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 12:56:20,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 12:56:20,260 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 12:56:20,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 12:56:20,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 12:56:20,261 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 12:56:20,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 12:56:20,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 12:56:20,264 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 12:56:20,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 12:56:20,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 12:56:20,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 12:56:20,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 12:56:20,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 12:56:20,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 12:56:20,268 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 12:56:20,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 12:56:20,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 12:56:20,270 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 12:56:20,282 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 12:56:20,285 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 12:56:20,286 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 12:56:20,287 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 12:56:20,288 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 12:56:20,290 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 12:56:20,290 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 12:56:20,291 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 12:56:20,291 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 12:56:20,292 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 12:56:20,292 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 12:56:20,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 12:56:20,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 12:56:20,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 12:56:20,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 12:56:20,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 12:56:20,295 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf [2022-01-10 12:56:20,318 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 12:56:20,318 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 12:56:20,318 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 12:56:20,318 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 12:56:20,319 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 12:56:20,319 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 12:56:20,319 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 12:56:20,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 12:56:20,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 12:56:20,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 12:56:20,320 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 12:56:20,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 12:56:20,320 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 12:56:20,320 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 12:56:20,320 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 12:56:20,320 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 12:56:20,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 12:56:20,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 12:56:20,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 12:56:20,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 12:56:20,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 12:56:20,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:56:20,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 12:56:20,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 12:56:20,321 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 12:56:20,321 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 12:56:20,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 12:56:20,321 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 12:56:20,321 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 12:56:20,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 12:56:20,321 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 12:56:20,322 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 12:56:20,322 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 12:56:20,322 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_BITWISE WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 12:56:20,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 12:56:20,556 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 12:56:20,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 12:56:20,560 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 12:56:20,560 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 12:56:20,561 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-01-10 12:56:20,609 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fdd6c2b4/2b3cf5268fe64712b0f4a96930bbb77c/FLAG64682530c [2022-01-10 12:56:20,990 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 12:56:20,990 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-01-10 12:56:21,002 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fdd6c2b4/2b3cf5268fe64712b0f4a96930bbb77c/FLAG64682530c [2022-01-10 12:56:21,019 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fdd6c2b4/2b3cf5268fe64712b0f4a96930bbb77c [2022-01-10 12:56:21,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 12:56:21,024 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 12:56:21,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 12:56:21,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 12:56:21,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 12:56:21,028 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:56:21" (1/1) ... [2022-01-10 12:56:21,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32a92ac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:21, skipping insertion in model container [2022-01-10 12:56:21,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:56:21" (1/1) ... [2022-01-10 12:56:21,034 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 12:56:21,057 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 12:56:21,229 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7235,7248] [2022-01-10 12:56:21,250 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:56:21,259 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 12:56:21,305 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7235,7248] [2022-01-10 12:56:21,318 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:56:21,330 INFO L208 MainTranslator]: Completed translation [2022-01-10 12:56:21,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:21 WrapperNode [2022-01-10 12:56:21,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 12:56:21,331 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 12:56:21,331 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 12:56:21,331 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 12:56:21,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:21" (1/1) ... [2022-01-10 12:56:21,368 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:21" (1/1) ... [2022-01-10 12:56:21,402 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 570 [2022-01-10 12:56:21,403 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 12:56:21,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 12:56:21,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 12:56:21,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 12:56:21,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:21" (1/1) ... [2022-01-10 12:56:21,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:21" (1/1) ... [2022-01-10 12:56:21,421 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:21" (1/1) ... [2022-01-10 12:56:21,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:21" (1/1) ... [2022-01-10 12:56:21,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:21" (1/1) ... [2022-01-10 12:56:21,436 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:21" (1/1) ... [2022-01-10 12:56:21,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:21" (1/1) ... [2022-01-10 12:56:21,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 12:56:21,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 12:56:21,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 12:56:21,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 12:56:21,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:21" (1/1) ... [2022-01-10 12:56:21,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:56:21,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:56:21,467 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 12:56:21,469 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 12:56:21,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 12:56:21,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 12:56:21,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 12:56:21,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 12:56:21,563 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 12:56:21,564 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 12:56:22,003 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 12:56:22,009 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 12:56:22,009 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 12:56:22,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:56:22 BoogieIcfgContainer [2022-01-10 12:56:22,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 12:56:22,011 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 12:56:22,011 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 12:56:22,014 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 12:56:22,016 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:56:22" (1/1) ... [2022-01-10 12:56:22,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:56:22 BasicIcfg [2022-01-10 12:56:22,355 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 12:56:22,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 12:56:22,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 12:56:22,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 12:56:22,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 12:56:21" (1/4) ... [2022-01-10 12:56:22,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463d01e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:56:22, skipping insertion in model container [2022-01-10 12:56:22,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:21" (2/4) ... [2022-01-10 12:56:22,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463d01e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:56:22, skipping insertion in model container [2022-01-10 12:56:22,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:56:22" (3/4) ... [2022-01-10 12:56:22,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463d01e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 12:56:22, skipping insertion in model container [2022-01-10 12:56:22,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:56:22" (4/4) ... [2022-01-10 12:56:22,364 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.cTransformedIcfg [2022-01-10 12:56:22,368 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 12:56:22,369 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 12:56:22,415 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 12:56:22,420 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 12:56:22,420 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 12:56:22,434 INFO L276 IsEmpty]: Start isEmpty. Operand has 135 states, 133 states have (on average 1.7744360902255638) internal successors, (236), 134 states have internal predecessors, (236), 0 states have call successors, (0), 0 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 12:56:22,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-10 12:56:22,443 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:56:22,443 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] [2022-01-10 12:56:22,444 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:56:22,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:56:22,449 INFO L85 PathProgramCache]: Analyzing trace with hash -753386120, now seen corresponding path program 1 times [2022-01-10 12:56:22,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:56:22,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198014408] [2022-01-10 12:56:22,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:56:22,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:56:22,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:56:22,985 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 12:56:22,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:56:22,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198014408] [2022-01-10 12:56:22,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198014408] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:56:22,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:56:22,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 12:56:22,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124411] [2022-01-10 12:56:22,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:56:22,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 12:56:22,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:56:23,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 12:56:23,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 12:56:23,027 INFO L87 Difference]: Start difference. First operand has 135 states, 133 states have (on average 1.7744360902255638) internal successors, (236), 134 states have internal predecessors, (236), 0 states have call successors, (0), 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 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 12:56:23,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:56:23,185 INFO L93 Difference]: Finished difference Result 288 states and 491 transitions. [2022-01-10 12:56:23,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 12:56:23,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2022-01-10 12:56:23,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:56:23,202 INFO L225 Difference]: With dead ends: 288 [2022-01-10 12:56:23,202 INFO L226 Difference]: Without dead ends: 201 [2022-01-10 12:56:23,205 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 12:56:23,209 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 131 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:56:23,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 496 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:56:23,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-01-10 12:56:23,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2022-01-10 12:56:23,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.5808080808080809) internal successors, (313), 198 states have internal predecessors, (313), 0 states have call successors, (0), 0 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 12:56:23,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 313 transitions. [2022-01-10 12:56:23,271 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 313 transitions. Word has length 57 [2022-01-10 12:56:23,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:56:23,272 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 313 transitions. [2022-01-10 12:56:23,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 12:56:23,272 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 313 transitions. [2022-01-10 12:56:23,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 12:56:23,278 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:56:23,278 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] [2022-01-10 12:56:23,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 12:56:23,279 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:56:23,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:56:23,281 INFO L85 PathProgramCache]: Analyzing trace with hash -694755855, now seen corresponding path program 1 times [2022-01-10 12:56:23,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:56:23,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327304566] [2022-01-10 12:56:23,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:56:23,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:56:23,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:56:23,407 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 12:56:23,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:56:23,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327304566] [2022-01-10 12:56:23,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327304566] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:56:23,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:56:23,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 12:56:23,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207516226] [2022-01-10 12:56:23,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:56:23,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 12:56:23,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:56:23,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 12:56:23,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 12:56:23,411 INFO L87 Difference]: Start difference. First operand 199 states and 313 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 12:56:23,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:56:23,446 INFO L93 Difference]: Finished difference Result 338 states and 548 transitions. [2022-01-10 12:56:23,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 12:56:23,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2022-01-10 12:56:23,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:56:23,448 INFO L225 Difference]: With dead ends: 338 [2022-01-10 12:56:23,448 INFO L226 Difference]: Without dead ends: 260 [2022-01-10 12:56:23,452 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 12:56:23,453 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 116 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:56:23,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 468 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:56:23,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-01-10 12:56:23,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 258. [2022-01-10 12:56:23,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 1.6070038910505837) internal successors, (413), 257 states have internal predecessors, (413), 0 states have call successors, (0), 0 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 12:56:23,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 413 transitions. [2022-01-10 12:56:23,487 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 413 transitions. Word has length 59 [2022-01-10 12:56:23,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:56:23,487 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 413 transitions. [2022-01-10 12:56:23,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 12:56:23,488 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 413 transitions. [2022-01-10 12:56:23,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 12:56:23,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:56:23,491 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] [2022-01-10 12:56:23,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 12:56:23,492 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:56:23,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:56:23,497 INFO L85 PathProgramCache]: Analyzing trace with hash 734424448, now seen corresponding path program 1 times [2022-01-10 12:56:23,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:56:23,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612982183] [2022-01-10 12:56:23,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:56:23,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:56:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:56:23,671 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 12:56:23,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:56:23,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612982183] [2022-01-10 12:56:23,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612982183] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:56:23,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:56:23,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 12:56:23,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866333413] [2022-01-10 12:56:23,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:56:23,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 12:56:23,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:56:23,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 12:56:23,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 12:56:23,673 INFO L87 Difference]: Start difference. First operand 258 states and 413 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 12:56:23,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:56:23,748 INFO L93 Difference]: Finished difference Result 732 states and 1168 transitions. [2022-01-10 12:56:23,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 12:56:23,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2022-01-10 12:56:23,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:56:23,751 INFO L225 Difference]: With dead ends: 732 [2022-01-10 12:56:23,751 INFO L226 Difference]: Without dead ends: 499 [2022-01-10 12:56:23,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:56:23,759 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 417 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:56:23,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 493 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:56:23,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-10 12:56:23,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 497. [2022-01-10 12:56:23,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 1.594758064516129) internal successors, (791), 496 states have internal predecessors, (791), 0 states have call successors, (0), 0 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 12:56:23,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 791 transitions. [2022-01-10 12:56:23,795 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 791 transitions. Word has length 59 [2022-01-10 12:56:23,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:56:23,796 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 791 transitions. [2022-01-10 12:56:23,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 12:56:23,796 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 791 transitions. [2022-01-10 12:56:23,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-10 12:56:23,797 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:56:23,797 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] [2022-01-10 12:56:23,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 12:56:23,797 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:56:23,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:56:23,798 INFO L85 PathProgramCache]: Analyzing trace with hash -2082807306, now seen corresponding path program 1 times [2022-01-10 12:56:23,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:56:23,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266498426] [2022-01-10 12:56:23,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:56:23,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:56:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:56:23,871 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 12:56:23,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:56:23,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266498426] [2022-01-10 12:56:23,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266498426] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:56:23,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:56:23,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 12:56:23,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637439399] [2022-01-10 12:56:23,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:56:23,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 12:56:23,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:56:23,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 12:56:23,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 12:56:23,873 INFO L87 Difference]: Start difference. First operand 497 states and 791 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 12:56:23,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:56:23,927 INFO L93 Difference]: Finished difference Result 1453 states and 2309 transitions. [2022-01-10 12:56:23,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 12:56:23,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2022-01-10 12:56:23,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:56:23,932 INFO L225 Difference]: With dead ends: 1453 [2022-01-10 12:56:23,932 INFO L226 Difference]: Without dead ends: 984 [2022-01-10 12:56:23,933 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 12:56:23,937 INFO L933 BasicCegarLoop]: 394 mSDtfsCounter, 193 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:56:23,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 589 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:56:23,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-01-10 12:56:23,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 499. [2022-01-10 12:56:23,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 1.5923694779116466) internal successors, (793), 498 states have internal predecessors, (793), 0 states have call successors, (0), 0 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 12:56:23,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 793 transitions. [2022-01-10 12:56:23,973 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 793 transitions. Word has length 60 [2022-01-10 12:56:23,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:56:23,973 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 793 transitions. [2022-01-10 12:56:23,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 12:56:23,974 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 793 transitions. [2022-01-10 12:56:23,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 12:56:23,976 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:56:23,976 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] [2022-01-10 12:56:23,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 12:56:23,976 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:56:23,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:56:23,976 INFO L85 PathProgramCache]: Analyzing trace with hash -2059998971, now seen corresponding path program 1 times [2022-01-10 12:56:23,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:56:23,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999769733] [2022-01-10 12:56:23,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:56:23,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:56:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:56:24,104 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 12:56:24,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:56:24,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999769733] [2022-01-10 12:56:24,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999769733] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:56:24,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:56:24,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 12:56:24,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002135224] [2022-01-10 12:56:24,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:56:24,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 12:56:24,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:56:24,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 12:56:24,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:56:24,105 INFO L87 Difference]: Start difference. First operand 499 states and 793 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 12:56:24,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:56:24,302 INFO L93 Difference]: Finished difference Result 1918 states and 3046 transitions. [2022-01-10 12:56:24,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 12:56:24,302 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2022-01-10 12:56:24,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:56:24,307 INFO L225 Difference]: With dead ends: 1918 [2022-01-10 12:56:24,307 INFO L226 Difference]: Without dead ends: 1431 [2022-01-10 12:56:24,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 12:56:24,309 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 522 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:56:24,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 850 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:56:24,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2022-01-10 12:56:24,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 960. [2022-01-10 12:56:24,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 1.5787278415015642) internal successors, (1514), 959 states have internal predecessors, (1514), 0 states have call successors, (0), 0 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 12:56:24,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1514 transitions. [2022-01-10 12:56:24,387 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1514 transitions. Word has length 61 [2022-01-10 12:56:24,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:56:24,387 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 1514 transitions. [2022-01-10 12:56:24,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 12:56:24,387 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1514 transitions. [2022-01-10 12:56:24,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 12:56:24,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:56:24,388 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] [2022-01-10 12:56:24,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 12:56:24,388 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:56:24,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:56:24,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1393761825, now seen corresponding path program 1 times [2022-01-10 12:56:24,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:56:24,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809641085] [2022-01-10 12:56:24,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:56:24,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:56:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:56:24,446 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 12:56:24,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:56:24,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809641085] [2022-01-10 12:56:24,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809641085] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:56:24,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:56:24,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 12:56:24,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900774014] [2022-01-10 12:56:24,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:56:24,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 12:56:24,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:56:24,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 12:56:24,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 12:56:24,448 INFO L87 Difference]: Start difference. First operand 960 states and 1514 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 12:56:24,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:56:24,511 INFO L93 Difference]: Finished difference Result 1676 states and 2637 transitions. [2022-01-10 12:56:24,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 12:56:24,512 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2022-01-10 12:56:24,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:56:24,514 INFO L225 Difference]: With dead ends: 1676 [2022-01-10 12:56:24,514 INFO L226 Difference]: Without dead ends: 732 [2022-01-10 12:56:24,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:56:24,516 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 69 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:56:24,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 647 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:56:24,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-01-10 12:56:24,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 732. [2022-01-10 12:56:24,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 1.5690834473324213) internal successors, (1147), 731 states have internal predecessors, (1147), 0 states have call successors, (0), 0 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 12:56:24,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1147 transitions. [2022-01-10 12:56:24,579 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1147 transitions. Word has length 61 [2022-01-10 12:56:24,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:56:24,580 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 1147 transitions. [2022-01-10 12:56:24,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 12:56:24,580 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1147 transitions. [2022-01-10 12:56:24,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-10 12:56:24,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:56:24,581 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] [2022-01-10 12:56:24,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 12:56:24,581 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:56:24,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:56:24,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1711527321, now seen corresponding path program 1 times [2022-01-10 12:56:24,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:56:24,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513485339] [2022-01-10 12:56:24,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:56:24,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:56:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:56:24,616 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 12:56:24,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:56:24,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513485339] [2022-01-10 12:56:24,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513485339] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:56:24,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:56:24,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 12:56:24,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388156775] [2022-01-10 12:56:24,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:56:24,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 12:56:24,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:56:24,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 12:56:24,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 12:56:24,618 INFO L87 Difference]: Start difference. First operand 732 states and 1147 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 12:56:24,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:56:24,681 INFO L93 Difference]: Finished difference Result 1442 states and 2253 transitions. [2022-01-10 12:56:24,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 12:56:24,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-10 12:56:24,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:56:24,685 INFO L225 Difference]: With dead ends: 1442 [2022-01-10 12:56:24,685 INFO L226 Difference]: Without dead ends: 965 [2022-01-10 12:56:24,686 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 12:56:24,686 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 190 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:56:24,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 407 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:56:24,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2022-01-10 12:56:24,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 732. [2022-01-10 12:56:24,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 1.5677154582763337) internal successors, (1146), 731 states have internal predecessors, (1146), 0 states have call successors, (0), 0 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 12:56:24,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1146 transitions. [2022-01-10 12:56:24,738 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1146 transitions. Word has length 63 [2022-01-10 12:56:24,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:56:24,738 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 1146 transitions. [2022-01-10 12:56:24,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 12:56:24,738 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1146 transitions. [2022-01-10 12:56:24,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 12:56:24,739 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:56:24,739 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] [2022-01-10 12:56:24,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 12:56:24,739 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:56:24,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:56:24,740 INFO L85 PathProgramCache]: Analyzing trace with hash -2102514838, now seen corresponding path program 1 times [2022-01-10 12:56:24,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:56:24,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588430485] [2022-01-10 12:56:24,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:56:24,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:56:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:56:24,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 12:56:24,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:56:24,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588430485] [2022-01-10 12:56:24,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588430485] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:56:24,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:56:24,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 12:56:24,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901500423] [2022-01-10 12:56:24,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:56:24,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 12:56:24,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:56:24,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 12:56:24,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 12:56:24,792 INFO L87 Difference]: Start difference. First operand 732 states and 1146 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 12:56:24,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:56:24,961 INFO L93 Difference]: Finished difference Result 2140 states and 3353 transitions. [2022-01-10 12:56:24,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 12:56:24,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2022-01-10 12:56:24,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:56:24,967 INFO L225 Difference]: With dead ends: 2140 [2022-01-10 12:56:24,967 INFO L226 Difference]: Without dead ends: 1438 [2022-01-10 12:56:24,969 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 12:56:24,969 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 365 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:56:24,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 551 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:56:24,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2022-01-10 12:56:25,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 741. [2022-01-10 12:56:25,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 1.5621621621621622) internal successors, (1156), 740 states have internal predecessors, (1156), 0 states have call successors, (0), 0 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 12:56:25,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1156 transitions. [2022-01-10 12:56:25,040 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1156 transitions. Word has length 64 [2022-01-10 12:56:25,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:56:25,041 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 1156 transitions. [2022-01-10 12:56:25,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 12:56:25,041 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1156 transitions. [2022-01-10 12:56:25,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 12:56:25,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:56:25,045 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] [2022-01-10 12:56:25,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 12:56:25,046 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:56:25,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:56:25,046 INFO L85 PathProgramCache]: Analyzing trace with hash -171895733, now seen corresponding path program 1 times [2022-01-10 12:56:25,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:56:25,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891731117] [2022-01-10 12:56:25,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:56:25,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:56:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:56:25,205 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 12:56:25,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:56:25,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891731117] [2022-01-10 12:56:25,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891731117] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:56:25,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:56:25,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 12:56:25,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748355058] [2022-01-10 12:56:25,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:56:25,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 12:56:25,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:56:25,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 12:56:25,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 12:56:25,206 INFO L87 Difference]: Start difference. First operand 741 states and 1156 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 12:56:25,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:56:25,360 INFO L93 Difference]: Finished difference Result 1841 states and 2969 transitions. [2022-01-10 12:56:25,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 12:56:25,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2022-01-10 12:56:25,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:56:25,365 INFO L225 Difference]: With dead ends: 1841 [2022-01-10 12:56:25,365 INFO L226 Difference]: Without dead ends: 1261 [2022-01-10 12:56:25,366 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 12:56:25,368 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 107 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:56:25,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 381 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:56:25,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2022-01-10 12:56:25,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1259. [2022-01-10 12:56:25,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1259 states, 1258 states have (on average 1.589825119236884) internal successors, (2000), 1258 states have internal predecessors, (2000), 0 states have call successors, (0), 0 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 12:56:25,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 2000 transitions. [2022-01-10 12:56:25,517 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 2000 transitions. Word has length 64 [2022-01-10 12:56:25,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:56:25,517 INFO L470 AbstractCegarLoop]: Abstraction has 1259 states and 2000 transitions. [2022-01-10 12:56:25,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 12:56:25,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 2000 transitions. [2022-01-10 12:56:25,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 12:56:25,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:56:25,519 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:56:25,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 12:56:25,519 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:56:25,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:56:25,519 INFO L85 PathProgramCache]: Analyzing trace with hash -481632190, now seen corresponding path program 1 times [2022-01-10 12:56:25,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:56:25,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382204331] [2022-01-10 12:56:25,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:56:25,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:56:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:56:25,581 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 12:56:25,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:56:25,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382204331] [2022-01-10 12:56:25,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382204331] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:56:25,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:56:25,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 12:56:25,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816560114] [2022-01-10 12:56:25,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:56:25,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 12:56:25,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:56:25,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 12:56:25,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 12:56:25,583 INFO L87 Difference]: Start difference. First operand 1259 states and 2000 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 12:56:25,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:56:25,837 INFO L93 Difference]: Finished difference Result 3447 states and 5556 transitions. [2022-01-10 12:56:25,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 12:56:25,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-01-10 12:56:25,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:56:25,844 INFO L225 Difference]: With dead ends: 3447 [2022-01-10 12:56:25,844 INFO L226 Difference]: Without dead ends: 2349 [2022-01-10 12:56:25,846 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 12:56:25,847 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 136 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:56:25,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 545 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:56:25,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2022-01-10 12:56:26,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 2347. [2022-01-10 12:56:26,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 1.5839727195225917) internal successors, (3716), 2346 states have internal predecessors, (3716), 0 states have call successors, (0), 0 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 12:56:26,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 3716 transitions. [2022-01-10 12:56:26,070 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 3716 transitions. Word has length 66 [2022-01-10 12:56:26,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:56:26,071 INFO L470 AbstractCegarLoop]: Abstraction has 2347 states and 3716 transitions. [2022-01-10 12:56:26,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 12:56:26,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 3716 transitions. [2022-01-10 12:56:26,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 12:56:26,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:56:26,072 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:56:26,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 12:56:26,072 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:56:26,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:56:26,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1424708173, now seen corresponding path program 1 times [2022-01-10 12:56:26,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:56:26,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216859332] [2022-01-10 12:56:26,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:56:26,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:56:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:56:26,140 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 12:56:26,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:56:26,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216859332] [2022-01-10 12:56:26,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216859332] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:56:26,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:56:26,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 12:56:26,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260064159] [2022-01-10 12:56:26,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:56:26,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 12:56:26,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:56:26,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 12:56:26,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 12:56:26,142 INFO L87 Difference]: Start difference. First operand 2347 states and 3716 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 12:56:26,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:56:26,496 INFO L93 Difference]: Finished difference Result 4326 states and 6956 transitions. [2022-01-10 12:56:26,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 12:56:26,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-01-10 12:56:26,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:56:26,507 INFO L225 Difference]: With dead ends: 4326 [2022-01-10 12:56:26,508 INFO L226 Difference]: Without dead ends: 3213 [2022-01-10 12:56:26,511 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 12:56:26,512 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 108 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:56:26,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 443 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:56:26,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3213 states. [2022-01-10 12:56:26,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3213 to 3211. [2022-01-10 12:56:26,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3211 states, 3210 states have (on average 1.5903426791277258) internal successors, (5105), 3210 states have internal predecessors, (5105), 0 states have call successors, (0), 0 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 12:56:26,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3211 states to 3211 states and 5105 transitions. [2022-01-10 12:56:26,823 INFO L78 Accepts]: Start accepts. Automaton has 3211 states and 5105 transitions. Word has length 66 [2022-01-10 12:56:26,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:56:26,823 INFO L470 AbstractCegarLoop]: Abstraction has 3211 states and 5105 transitions. [2022-01-10 12:56:26,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 12:56:26,824 INFO L276 IsEmpty]: Start isEmpty. Operand 3211 states and 5105 transitions. [2022-01-10 12:56:26,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 12:56:26,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:56:26,825 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:56:26,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 12:56:26,825 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:56:26,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:56:26,825 INFO L85 PathProgramCache]: Analyzing trace with hash 709957149, now seen corresponding path program 1 times [2022-01-10 12:56:26,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:56:26,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830800643] [2022-01-10 12:56:26,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:56:26,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:56:26,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:56:26,898 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 12:56:26,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:56:26,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830800643] [2022-01-10 12:56:26,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830800643] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:56:26,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:56:26,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 12:56:26,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821582082] [2022-01-10 12:56:26,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:56:26,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 12:56:26,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:56:26,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 12:56:26,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 12:56:26,899 INFO L87 Difference]: Start difference. First operand 3211 states and 5105 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 12:56:27,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:56:27,531 INFO L93 Difference]: Finished difference Result 9321 states and 14854 transitions. [2022-01-10 12:56:27,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 12:56:27,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-01-10 12:56:27,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:56:27,551 INFO L225 Difference]: With dead ends: 9321 [2022-01-10 12:56:27,551 INFO L226 Difference]: Without dead ends: 6178 [2022-01-10 12:56:27,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:56:27,556 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 395 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:56:27,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 468 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:56:27,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6178 states. [2022-01-10 12:56:28,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6178 to 6176. [2022-01-10 12:56:28,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6176 states, 6175 states have (on average 1.5860728744939272) internal successors, (9794), 6175 states have internal predecessors, (9794), 0 states have call successors, (0), 0 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 12:56:28,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6176 states to 6176 states and 9794 transitions. [2022-01-10 12:56:28,218 INFO L78 Accepts]: Start accepts. Automaton has 6176 states and 9794 transitions. Word has length 66 [2022-01-10 12:56:28,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:56:28,219 INFO L470 AbstractCegarLoop]: Abstraction has 6176 states and 9794 transitions. [2022-01-10 12:56:28,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 12:56:28,219 INFO L276 IsEmpty]: Start isEmpty. Operand 6176 states and 9794 transitions. [2022-01-10 12:56:28,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 12:56:28,220 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:56:28,220 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:56:28,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 12:56:28,221 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:56:28,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:56:28,221 INFO L85 PathProgramCache]: Analyzing trace with hash 2012846176, now seen corresponding path program 1 times [2022-01-10 12:56:28,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:56:28,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032090944] [2022-01-10 12:56:28,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:56:28,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:56:28,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:56:28,273 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 12:56:28,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:56:28,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032090944] [2022-01-10 12:56:28,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032090944] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:56:28,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:56:28,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 12:56:28,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964570367] [2022-01-10 12:56:28,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:56:28,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 12:56:28,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:56:28,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 12:56:28,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 12:56:28,275 INFO L87 Difference]: Start difference. First operand 6176 states and 9794 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 12:56:28,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:56:28,755 INFO L93 Difference]: Finished difference Result 9155 states and 14558 transitions. [2022-01-10 12:56:28,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 12:56:28,756 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-01-10 12:56:28,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:56:28,772 INFO L225 Difference]: With dead ends: 9155 [2022-01-10 12:56:28,772 INFO L226 Difference]: Without dead ends: 5185 [2022-01-10 12:56:28,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:56:28,782 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 47 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:56:28,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 627 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:56:28,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5185 states. [2022-01-10 12:56:29,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5185 to 5185. [2022-01-10 12:56:29,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5185 states, 5184 states have (on average 1.5831404320987654) internal successors, (8207), 5184 states have internal predecessors, (8207), 0 states have call successors, (0), 0 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 12:56:29,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5185 states to 5185 states and 8207 transitions. [2022-01-10 12:56:29,322 INFO L78 Accepts]: Start accepts. Automaton has 5185 states and 8207 transitions. Word has length 68 [2022-01-10 12:56:29,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:56:29,323 INFO L470 AbstractCegarLoop]: Abstraction has 5185 states and 8207 transitions. [2022-01-10 12:56:29,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 12:56:29,323 INFO L276 IsEmpty]: Start isEmpty. Operand 5185 states and 8207 transitions. [2022-01-10 12:56:29,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 12:56:29,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:56:29,324 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:56:29,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 12:56:29,325 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:56:29,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:56:29,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1537664968, now seen corresponding path program 1 times [2022-01-10 12:56:29,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:56:29,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369245604] [2022-01-10 12:56:29,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:56:29,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:56:29,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:56:29,437 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 12:56:29,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:56:29,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369245604] [2022-01-10 12:56:29,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369245604] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:56:29,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:56:29,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 12:56:29,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231402963] [2022-01-10 12:56:29,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:56:29,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 12:56:29,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:56:29,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 12:56:29,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:56:29,440 INFO L87 Difference]: Start difference. First operand 5185 states and 8207 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 12:56:30,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:56:30,394 INFO L93 Difference]: Finished difference Result 13589 states and 21450 transitions. [2022-01-10 12:56:30,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 12:56:30,394 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-01-10 12:56:30,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:56:30,411 INFO L225 Difference]: With dead ends: 13589 [2022-01-10 12:56:30,411 INFO L226 Difference]: Without dead ends: 8448 [2022-01-10 12:56:30,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 12:56:30,418 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 513 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:56:30,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [513 Valid, 813 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:56:30,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8448 states. [2022-01-10 12:56:30,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8448 to 5327. [2022-01-10 12:56:30,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5327 states, 5326 states have (on average 1.5715358618099888) internal successors, (8370), 5326 states have internal predecessors, (8370), 0 states have call successors, (0), 0 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 12:56:30,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5327 states to 5327 states and 8370 transitions. [2022-01-10 12:56:30,900 INFO L78 Accepts]: Start accepts. Automaton has 5327 states and 8370 transitions. Word has length 68 [2022-01-10 12:56:30,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:56:30,900 INFO L470 AbstractCegarLoop]: Abstraction has 5327 states and 8370 transitions. [2022-01-10 12:56:30,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 12:56:30,900 INFO L276 IsEmpty]: Start isEmpty. Operand 5327 states and 8370 transitions. [2022-01-10 12:56:30,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 12:56:30,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:56:30,902 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:56:30,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-10 12:56:30,902 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:56:30,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:56:30,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1845262692, now seen corresponding path program 1 times [2022-01-10 12:56:30,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:56:30,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723158513] [2022-01-10 12:56:30,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:56:30,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:56:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:56:30,955 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 12:56:30,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:56:30,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723158513] [2022-01-10 12:56:30,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723158513] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:56:30,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:56:30,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 12:56:30,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103754434] [2022-01-10 12:56:30,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:56:30,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 12:56:30,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:56:30,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 12:56:30,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 12:56:30,956 INFO L87 Difference]: Start difference. First operand 5327 states and 8370 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 12:56:31,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:56:31,365 INFO L93 Difference]: Finished difference Result 9612 states and 15082 transitions. [2022-01-10 12:56:31,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 12:56:31,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-01-10 12:56:31,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:56:31,373 INFO L225 Difference]: With dead ends: 9612 [2022-01-10 12:56:31,374 INFO L226 Difference]: Without dead ends: 4321 [2022-01-10 12:56:31,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:56:31,382 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 47 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:56:31,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 623 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:56:31,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4321 states. [2022-01-10 12:56:31,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4321 to 4321. [2022-01-10 12:56:31,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4321 states, 4320 states have (on average 1.5650462962962963) internal successors, (6761), 4320 states have internal predecessors, (6761), 0 states have call successors, (0), 0 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 12:56:31,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4321 states to 4321 states and 6761 transitions. [2022-01-10 12:56:31,766 INFO L78 Accepts]: Start accepts. Automaton has 4321 states and 6761 transitions. Word has length 68 [2022-01-10 12:56:31,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:56:31,766 INFO L470 AbstractCegarLoop]: Abstraction has 4321 states and 6761 transitions. [2022-01-10 12:56:31,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 12:56:31,767 INFO L276 IsEmpty]: Start isEmpty. Operand 4321 states and 6761 transitions. [2022-01-10 12:56:31,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-10 12:56:31,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:56:31,768 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:56:31,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-10 12:56:31,769 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:56:31,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:56:31,769 INFO L85 PathProgramCache]: Analyzing trace with hash 700676502, now seen corresponding path program 1 times [2022-01-10 12:56:31,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:56:31,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868914992] [2022-01-10 12:56:31,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:56:31,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:56:31,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:56:31,813 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 12:56:31,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:56:31,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868914992] [2022-01-10 12:56:31,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868914992] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:56:31,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:56:31,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 12:56:31,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641197426] [2022-01-10 12:56:31,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:56:31,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 12:56:31,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:56:31,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 12:56:31,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 12:56:31,815 INFO L87 Difference]: Start difference. First operand 4321 states and 6761 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 12:56:32,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:56:32,336 INFO L93 Difference]: Finished difference Result 8578 states and 13440 transitions. [2022-01-10 12:56:32,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 12:56:32,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-01-10 12:56:32,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:56:32,348 INFO L225 Difference]: With dead ends: 8578 [2022-01-10 12:56:32,349 INFO L226 Difference]: Without dead ends: 5965 [2022-01-10 12:56:32,353 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 12:56:32,354 INFO L933 BasicCegarLoop]: 295 mSDtfsCounter, 176 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:56:32,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 483 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:56:32,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5965 states. [2022-01-10 12:56:32,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5965 to 4321. [2022-01-10 12:56:32,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4321 states, 4320 states have (on average 1.5643518518518518) internal successors, (6758), 4320 states have internal predecessors, (6758), 0 states have call successors, (0), 0 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 12:56:32,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4321 states to 4321 states and 6758 transitions. [2022-01-10 12:56:32,795 INFO L78 Accepts]: Start accepts. Automaton has 4321 states and 6758 transitions. Word has length 70 [2022-01-10 12:56:32,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:56:32,795 INFO L470 AbstractCegarLoop]: Abstraction has 4321 states and 6758 transitions. [2022-01-10 12:56:32,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 12:56:32,795 INFO L276 IsEmpty]: Start isEmpty. Operand 4321 states and 6758 transitions. [2022-01-10 12:56:32,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-10 12:56:32,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:56:32,796 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] [2022-01-10 12:56:32,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-10 12:56:32,797 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:56:32,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:56:32,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1818284684, now seen corresponding path program 1 times [2022-01-10 12:56:32,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:56:32,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229053553] [2022-01-10 12:56:32,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:56:32,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:56:32,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:56:32,898 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 12:56:32,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:56:32,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229053553] [2022-01-10 12:56:32,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229053553] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:56:32,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:56:32,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 12:56:32,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505508991] [2022-01-10 12:56:32,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:56:32,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 12:56:32,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:56:32,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 12:56:32,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 12:56:32,900 INFO L87 Difference]: Start difference. First operand 4321 states and 6758 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 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 12:56:34,962 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 12:56:36,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:56:36,047 INFO L93 Difference]: Finished difference Result 11621 states and 18496 transitions. [2022-01-10 12:56:36,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 12:56:36,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2022-01-10 12:56:36,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:56:36,062 INFO L225 Difference]: With dead ends: 11621 [2022-01-10 12:56:36,063 INFO L226 Difference]: Without dead ends: 7737 [2022-01-10 12:56:36,068 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 12:56:36,069 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 99 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:56:36,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 375 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-01-10 12:56:36,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7737 states. [2022-01-10 12:56:37,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7737 to 7735. [2022-01-10 12:56:37,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7735 states, 7734 states have (on average 1.5743470390483578) internal successors, (12176), 7734 states have internal predecessors, (12176), 0 states have call successors, (0), 0 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 12:56:37,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7735 states to 7735 states and 12176 transitions. [2022-01-10 12:56:37,025 INFO L78 Accepts]: Start accepts. Automaton has 7735 states and 12176 transitions. Word has length 71 [2022-01-10 12:56:37,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:56:37,025 INFO L470 AbstractCegarLoop]: Abstraction has 7735 states and 12176 transitions. [2022-01-10 12:56:37,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 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 12:56:37,025 INFO L276 IsEmpty]: Start isEmpty. Operand 7735 states and 12176 transitions. [2022-01-10 12:56:37,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-10 12:56:37,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:56:37,027 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:56:37,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-10 12:56:37,027 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:56:37,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:56:37,027 INFO L85 PathProgramCache]: Analyzing trace with hash -2091560203, now seen corresponding path program 1 times [2022-01-10 12:56:37,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:56:37,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035611593] [2022-01-10 12:56:37,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:56:37,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:56:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:56:37,089 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 12:56:37,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:56:37,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035611593] [2022-01-10 12:56:37,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035611593] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:56:37,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:56:37,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 12:56:37,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195909645] [2022-01-10 12:56:37,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:56:37,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 12:56:37,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:56:37,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 12:56:37,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 12:56:37,091 INFO L87 Difference]: Start difference. First operand 7735 states and 12176 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 12:56:38,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:56:38,476 INFO L93 Difference]: Finished difference Result 19407 states and 30766 transitions. [2022-01-10 12:56:38,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 12:56:38,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-01-10 12:56:38,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:56:38,499 INFO L225 Difference]: With dead ends: 19407 [2022-01-10 12:56:38,499 INFO L226 Difference]: Without dead ends: 12109 [2022-01-10 12:56:38,510 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 12:56:38,510 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 121 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:56:38,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 513 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:56:38,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12109 states. [2022-01-10 12:56:39,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12109 to 12107. [2022-01-10 12:56:39,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12107 states, 12106 states have (on average 1.5618701470345284) internal successors, (18908), 12106 states have internal predecessors, (18908), 0 states have call successors, (0), 0 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 12:56:39,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12107 states to 12107 states and 18908 transitions. [2022-01-10 12:56:39,956 INFO L78 Accepts]: Start accepts. Automaton has 12107 states and 18908 transitions. Word has length 73 [2022-01-10 12:56:39,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:56:39,956 INFO L470 AbstractCegarLoop]: Abstraction has 12107 states and 18908 transitions. [2022-01-10 12:56:39,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 12:56:39,957 INFO L276 IsEmpty]: Start isEmpty. Operand 12107 states and 18908 transitions. [2022-01-10 12:56:39,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-10 12:56:39,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:56:39,959 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:56:39,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-10 12:56:39,959 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:56:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:56:39,959 INFO L85 PathProgramCache]: Analyzing trace with hash 694855157, now seen corresponding path program 1 times [2022-01-10 12:56:39,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:56:39,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608343931] [2022-01-10 12:56:39,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:56:39,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:56:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:56:40,037 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 12:56:40,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:56:40,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608343931] [2022-01-10 12:56:40,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608343931] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:56:40,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:56:40,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 12:56:40,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501632352] [2022-01-10 12:56:40,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:56:40,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 12:56:40,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:56:40,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 12:56:40,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 12:56:40,039 INFO L87 Difference]: Start difference. First operand 12107 states and 18908 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 12:56:42,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:56:42,364 INFO L93 Difference]: Finished difference Result 30416 states and 47764 transitions. [2022-01-10 12:56:42,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 12:56:42,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-01-10 12:56:42,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:56:42,397 INFO L225 Difference]: With dead ends: 30416 [2022-01-10 12:56:42,397 INFO L226 Difference]: Without dead ends: 18882 [2022-01-10 12:56:42,410 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 12:56:42,410 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 124 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:56:42,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 536 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:56:42,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18882 states. [2022-01-10 12:56:44,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18882 to 18880. [2022-01-10 12:56:44,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18880 states, 18879 states have (on average 1.5470628740929075) internal successors, (29207), 18879 states have internal predecessors, (29207), 0 states have call successors, (0), 0 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 12:56:44,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18880 states to 18880 states and 29207 transitions. [2022-01-10 12:56:44,726 INFO L78 Accepts]: Start accepts. Automaton has 18880 states and 29207 transitions. Word has length 73 [2022-01-10 12:56:44,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:56:44,726 INFO L470 AbstractCegarLoop]: Abstraction has 18880 states and 29207 transitions. [2022-01-10 12:56:44,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 12:56:44,726 INFO L276 IsEmpty]: Start isEmpty. Operand 18880 states and 29207 transitions. [2022-01-10 12:56:44,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-10 12:56:44,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:56:44,728 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] [2022-01-10 12:56:44,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-10 12:56:44,729 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:56:44,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:56:44,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1392465622, now seen corresponding path program 1 times [2022-01-10 12:56:44,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:56:44,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911353833] [2022-01-10 12:56:44,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:56:44,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:56:44,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:56:44,807 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 12:56:44,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:56:44,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911353833] [2022-01-10 12:56:44,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911353833] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:56:44,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:56:44,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 12:56:44,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247224749] [2022-01-10 12:56:44,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:56:44,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 12:56:44,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:56:44,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 12:56:44,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 12:56:44,808 INFO L87 Difference]: Start difference. First operand 18880 states and 29207 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 12:56:47,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:56:47,425 INFO L93 Difference]: Finished difference Result 38876 states and 60123 transitions. [2022-01-10 12:56:47,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 12:56:47,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2022-01-10 12:56:47,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:56:47,455 INFO L225 Difference]: With dead ends: 38876 [2022-01-10 12:56:47,455 INFO L226 Difference]: Without dead ends: 20149 [2022-01-10 12:56:47,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:56:47,474 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 443 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:56:47,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 372 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:56:47,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20149 states. [2022-01-10 12:56:50,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20149 to 18939. [2022-01-10 12:56:50,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18939 states, 18938 states have (on average 1.5452001267293274) internal successors, (29263), 18938 states have internal predecessors, (29263), 0 states have call successors, (0), 0 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 12:56:50,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18939 states to 18939 states and 29263 transitions. [2022-01-10 12:56:50,066 INFO L78 Accepts]: Start accepts. Automaton has 18939 states and 29263 transitions. Word has length 74 [2022-01-10 12:56:50,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:56:50,066 INFO L470 AbstractCegarLoop]: Abstraction has 18939 states and 29263 transitions. [2022-01-10 12:56:50,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 12:56:50,066 INFO L276 IsEmpty]: Start isEmpty. Operand 18939 states and 29263 transitions. [2022-01-10 12:56:50,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-10 12:56:50,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:56:50,069 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] [2022-01-10 12:56:50,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-10 12:56:50,069 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:56:50,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:56:50,069 INFO L85 PathProgramCache]: Analyzing trace with hash -683741993, now seen corresponding path program 1 times [2022-01-10 12:56:50,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:56:50,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945260552] [2022-01-10 12:56:50,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:56:50,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:56:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:56:50,129 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 12:56:50,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:56:50,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945260552] [2022-01-10 12:56:50,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945260552] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:56:50,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:56:50,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 12:56:50,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712751899] [2022-01-10 12:56:50,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:56:50,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 12:56:50,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:56:50,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 12:56:50,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 12:56:50,144 INFO L87 Difference]: Start difference. First operand 18939 states and 29263 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 12:56:52,514 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 12:56:55,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:56:55,476 INFO L93 Difference]: Finished difference Result 35574 states and 55585 transitions. [2022-01-10 12:56:55,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 12:56:55,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2022-01-10 12:56:55,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:56:55,512 INFO L225 Difference]: With dead ends: 35574 [2022-01-10 12:56:55,513 INFO L226 Difference]: Without dead ends: 25900 [2022-01-10 12:56:55,523 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 12:56:55,523 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 100 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-10 12:56:55,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 424 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 3 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-01-10 12:56:55,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25900 states. [2022-01-10 12:56:58,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25900 to 25898. [2022-01-10 12:56:58,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25898 states, 25897 states have (on average 1.5492528092056994) internal successors, (40121), 25897 states have internal predecessors, (40121), 0 states have call successors, (0), 0 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 12:56:58,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25898 states to 25898 states and 40121 transitions. [2022-01-10 12:56:58,862 INFO L78 Accepts]: Start accepts. Automaton has 25898 states and 40121 transitions. Word has length 74 [2022-01-10 12:56:58,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:56:58,862 INFO L470 AbstractCegarLoop]: Abstraction has 25898 states and 40121 transitions. [2022-01-10 12:56:58,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 12:56:58,862 INFO L276 IsEmpty]: Start isEmpty. Operand 25898 states and 40121 transitions. [2022-01-10 12:56:58,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-10 12:56:58,864 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:56:58,864 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:56:58,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-10 12:56:58,865 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:56:58,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:56:58,865 INFO L85 PathProgramCache]: Analyzing trace with hash -2016272890, now seen corresponding path program 1 times [2022-01-10 12:56:58,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:56:58,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627548258] [2022-01-10 12:56:58,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:56:58,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:56:58,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:56:58,903 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 12:56:58,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:56:58,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627548258] [2022-01-10 12:56:58,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627548258] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:56:58,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:56:58,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 12:56:58,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487157228] [2022-01-10 12:56:58,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:56:58,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 12:56:58,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:56:58,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 12:56:58,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 12:56:58,905 INFO L87 Difference]: Start difference. First operand 25898 states and 40121 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 12:57:05,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:57:05,286 INFO L93 Difference]: Finished difference Result 70948 states and 110136 transitions. [2022-01-10 12:57:05,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 12:57:05,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-01-10 12:57:05,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:57:05,364 INFO L225 Difference]: With dead ends: 70948 [2022-01-10 12:57:05,364 INFO L226 Difference]: Without dead ends: 51593 [2022-01-10 12:57:05,387 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 12:57:05,387 INFO L933 BasicCegarLoop]: 358 mSDtfsCounter, 165 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:57:05,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 545 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:57:05,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51593 states. [2022-01-10 12:57:09,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51593 to 25908. [2022-01-10 12:57:09,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25908 states, 25907 states have (on average 1.5490407997838422) internal successors, (40131), 25907 states have internal predecessors, (40131), 0 states have call successors, (0), 0 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 12:57:09,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25908 states to 25908 states and 40131 transitions. [2022-01-10 12:57:09,153 INFO L78 Accepts]: Start accepts. Automaton has 25908 states and 40131 transitions. Word has length 75 [2022-01-10 12:57:09,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:57:09,153 INFO L470 AbstractCegarLoop]: Abstraction has 25908 states and 40131 transitions. [2022-01-10 12:57:09,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 12:57:09,153 INFO L276 IsEmpty]: Start isEmpty. Operand 25908 states and 40131 transitions. [2022-01-10 12:57:09,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 12:57:09,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:57:09,155 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:57:09,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-10 12:57:09,155 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:57:09,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:57:09,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1024163023, now seen corresponding path program 1 times [2022-01-10 12:57:09,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:57:09,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566727916] [2022-01-10 12:57:09,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:57:09,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:57:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:57:09,246 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 12:57:09,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:57:09,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566727916] [2022-01-10 12:57:09,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566727916] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:57:09,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:57:09,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 12:57:09,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536084048] [2022-01-10 12:57:09,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:57:09,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 12:57:09,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:57:09,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 12:57:09,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:57:09,247 INFO L87 Difference]: Start difference. First operand 25908 states and 40131 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 12:57:15,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:57:15,529 INFO L93 Difference]: Finished difference Result 66861 states and 103493 transitions. [2022-01-10 12:57:15,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 12:57:15,530 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-01-10 12:57:15,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:57:15,586 INFO L225 Difference]: With dead ends: 66861 [2022-01-10 12:57:15,586 INFO L226 Difference]: Without dead ends: 42441 [2022-01-10 12:57:15,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 12:57:15,607 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 568 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:57:15,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [568 Valid, 822 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:57:15,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42441 states. [2022-01-10 12:57:19,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42441 to 26129. [2022-01-10 12:57:19,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26129 states, 26128 states have (on average 1.5449709124311084) internal successors, (40367), 26128 states have internal predecessors, (40367), 0 states have call successors, (0), 0 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 12:57:19,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26129 states to 26129 states and 40367 transitions. [2022-01-10 12:57:19,589 INFO L78 Accepts]: Start accepts. Automaton has 26129 states and 40367 transitions. Word has length 76 [2022-01-10 12:57:19,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:57:19,590 INFO L470 AbstractCegarLoop]: Abstraction has 26129 states and 40367 transitions. [2022-01-10 12:57:19,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 12:57:19,590 INFO L276 IsEmpty]: Start isEmpty. Operand 26129 states and 40367 transitions. [2022-01-10 12:57:19,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 12:57:19,592 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:57:19,592 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:57:19,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-10 12:57:19,592 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:57:19,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:57:19,592 INFO L85 PathProgramCache]: Analyzing trace with hash -549904491, now seen corresponding path program 1 times [2022-01-10 12:57:19,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:57:19,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945619841] [2022-01-10 12:57:19,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:57:19,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:57:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:57:19,658 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 12:57:19,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:57:19,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945619841] [2022-01-10 12:57:19,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945619841] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:57:19,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:57:19,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 12:57:19,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629790237] [2022-01-10 12:57:19,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:57:19,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 12:57:19,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:57:19,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 12:57:19,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 12:57:19,660 INFO L87 Difference]: Start difference. First operand 26129 states and 40367 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 12:57:23,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:57:23,027 INFO L93 Difference]: Finished difference Result 42353 states and 65436 transitions. [2022-01-10 12:57:23,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 12:57:23,028 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-01-10 12:57:23,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:57:23,054 INFO L225 Difference]: With dead ends: 42353 [2022-01-10 12:57:23,054 INFO L226 Difference]: Without dead ends: 22603 [2022-01-10 12:57:23,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:57:23,066 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 23 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:57:23,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 596 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:57:23,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22603 states. [2022-01-10 12:57:26,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22603 to 22603. [2022-01-10 12:57:26,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22603 states, 22602 states have (on average 1.54176621537917) internal successors, (34847), 22602 states have internal predecessors, (34847), 0 states have call successors, (0), 0 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 12:57:26,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22603 states to 22603 states and 34847 transitions. [2022-01-10 12:57:26,440 INFO L78 Accepts]: Start accepts. Automaton has 22603 states and 34847 transitions. Word has length 76 [2022-01-10 12:57:26,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:57:26,440 INFO L470 AbstractCegarLoop]: Abstraction has 22603 states and 34847 transitions. [2022-01-10 12:57:26,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 12:57:26,440 INFO L276 IsEmpty]: Start isEmpty. Operand 22603 states and 34847 transitions. [2022-01-10 12:57:26,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 12:57:26,442 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:57:26,442 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] [2022-01-10 12:57:26,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-10 12:57:26,442 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:57:26,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:57:26,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1135680122, now seen corresponding path program 1 times [2022-01-10 12:57:26,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:57:26,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823748278] [2022-01-10 12:57:26,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:57:26,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:57:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:57:26,667 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 12:57:26,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:57:26,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823748278] [2022-01-10 12:57:26,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823748278] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:57:26,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:57:26,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 12:57:26,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845933850] [2022-01-10 12:57:26,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:57:26,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 12:57:26,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:57:26,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 12:57:26,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:57:26,668 INFO L87 Difference]: Start difference. First operand 22603 states and 34847 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)