/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_SUM.epf -i ../../../trunk/examples/svcomp/loop-simple/nested_4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 02:12:13,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 02:12:13,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 02:12:13,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 02:12:13,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 02:12:13,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 02:12:13,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 02:12:13,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 02:12:13,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 02:12:13,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 02:12:13,117 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 02:12:13,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 02:12:13,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 02:12:13,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 02:12:13,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 02:12:13,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 02:12:13,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 02:12:13,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 02:12:13,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 02:12:13,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 02:12:13,137 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 02:12:13,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 02:12:13,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 02:12:13,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 02:12:13,146 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 02:12:13,147 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 02:12:13,147 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 02:12:13,148 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 02:12:13,149 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 02:12:13,149 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 02:12:13,150 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 02:12:13,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 02:12:13,152 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 02:12:13,152 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 02:12:13,153 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 02:12:13,153 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 02:12:13,154 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 02:12:13,154 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 02:12:13,154 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 02:12:13,155 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 02:12:13,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 02:12:13,156 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 02:12:13,187 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 02:12:13,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 02:12:13,188 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 02:12:13,188 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 02:12:13,189 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 02:12:13,189 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 02:12:13,189 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 02:12:13,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 02:12:13,190 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 02:12:13,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 02:12:13,190 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 02:12:13,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 02:12:13,191 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 02:12:13,191 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 02:12:13,191 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 02:12:13,191 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 02:12:13,191 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 02:12:13,191 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 02:12:13,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 02:12:13,192 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 02:12:13,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 02:12:13,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 02:12:13,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 02:12:13,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 02:12:13,192 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 02:12:13,192 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 02:12:13,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 02:12:13,193 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 02:12:13,193 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 02:12:13,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 02:12:13,193 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 02:12:13,193 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 02:12:13,194 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 02:12:13,194 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 02:12:13,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 02:12:13,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 02:12:13,452 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 02:12:13,452 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 02:12:13,453 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 02:12:13,453 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/nested_4.c [2022-01-11 02:12:13,517 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b13c6f760/08972e55a89541ceac3733ad589b4f01/FLAGdb8869c0c [2022-01-11 02:12:13,861 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 02:12:13,861 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_4.c [2022-01-11 02:12:13,870 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b13c6f760/08972e55a89541ceac3733ad589b4f01/FLAGdb8869c0c [2022-01-11 02:12:14,297 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b13c6f760/08972e55a89541ceac3733ad589b4f01 [2022-01-11 02:12:14,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 02:12:14,304 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 02:12:14,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 02:12:14,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 02:12:14,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 02:12:14,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 02:12:14" (1/1) ... [2022-01-11 02:12:14,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@732178fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:12:14, skipping insertion in model container [2022-01-11 02:12:14,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 02:12:14" (1/1) ... [2022-01-11 02:12:14,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 02:12:14,329 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 02:12:14,443 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_4.c[841,854] [2022-01-11 02:12:14,446 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 02:12:14,461 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 02:12:14,476 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_4.c[841,854] [2022-01-11 02:12:14,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 02:12:14,512 INFO L208 MainTranslator]: Completed translation [2022-01-11 02:12:14,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:12:14 WrapperNode [2022-01-11 02:12:14,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 02:12:14,514 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 02:12:14,514 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 02:12:14,514 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 02:12:14,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:12:14" (1/1) ... [2022-01-11 02:12:14,526 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:12:14" (1/1) ... [2022-01-11 02:12:14,540 INFO L137 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 50 [2022-01-11 02:12:14,541 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 02:12:14,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 02:12:14,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 02:12:14,542 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 02:12:14,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:12:14" (1/1) ... [2022-01-11 02:12:14,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:12:14" (1/1) ... [2022-01-11 02:12:14,558 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:12:14" (1/1) ... [2022-01-11 02:12:14,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:12:14" (1/1) ... [2022-01-11 02:12:14,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:12:14" (1/1) ... [2022-01-11 02:12:14,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:12:14" (1/1) ... [2022-01-11 02:12:14,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:12:14" (1/1) ... [2022-01-11 02:12:14,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 02:12:14,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 02:12:14,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 02:12:14,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 02:12:14,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:12:14" (1/1) ... [2022-01-11 02:12:14,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 02:12:14,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:12:14,599 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) [2022-01-11 02:12:14,601 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 [2022-01-11 02:12:14,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 02:12:14,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 02:12:14,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 02:12:14,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 02:12:14,680 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 02:12:14,681 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 02:12:14,762 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 02:12:14,767 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 02:12:14,767 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-11 02:12:14,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:12:14 BoogieIcfgContainer [2022-01-11 02:12:14,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 02:12:14,769 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 02:12:14,769 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 02:12:14,770 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 02:12:14,773 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:12:14" (1/1) ... [2022-01-11 02:12:14,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 02:12:14 BasicIcfg [2022-01-11 02:12:14,829 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 02:12:14,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 02:12:14,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 02:12:14,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 02:12:14,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 02:12:14" (1/4) ... [2022-01-11 02:12:14,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df8c0f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:12:14, skipping insertion in model container [2022-01-11 02:12:14,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:12:14" (2/4) ... [2022-01-11 02:12:14,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df8c0f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:12:14, skipping insertion in model container [2022-01-11 02:12:14,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:12:14" (3/4) ... [2022-01-11 02:12:14,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df8c0f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 02:12:14, skipping insertion in model container [2022-01-11 02:12:14,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 02:12:14" (4/4) ... [2022-01-11 02:12:14,836 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_4.cTransformedIcfg [2022-01-11 02:12:14,839 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 02:12:14,839 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 02:12:14,873 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 02:12:14,879 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 [2022-01-11 02:12:14,879 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 02:12:14,887 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:12:14,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-01-11 02:12:14,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:12:14,891 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-01-11 02:12:14,892 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:12:14,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:12:14,896 INFO L85 PathProgramCache]: Analyzing trace with hash 89736549, now seen corresponding path program 1 times [2022-01-11 02:12:14,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:12:14,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799244235] [2022-01-11 02:12:14,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:12:14,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:12:14,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:12:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:12:15,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:12:15,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799244235] [2022-01-11 02:12:15,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799244235] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:12:15,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:12:15,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 02:12:15,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311997373] [2022-01-11 02:12:15,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:12:15,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-11 02:12:15,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:12:15,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-11 02:12:15,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 02:12:15,057 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:12:15,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:12:15,073 INFO L93 Difference]: Finished difference Result 32 states and 48 transitions. [2022-01-11 02:12:15,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-11 02:12:15,075 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-01-11 02:12:15,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:12:15,081 INFO L225 Difference]: With dead ends: 32 [2022-01-11 02:12:15,081 INFO L226 Difference]: Without dead ends: 13 [2022-01-11 02:12:15,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 02:12:15,092 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:12:15,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:12:15,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-01-11 02:12:15,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-01-11 02:12:15,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:12:15,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-01-11 02:12:15,123 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 5 [2022-01-11 02:12:15,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:12:15,124 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-01-11 02:12:15,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:12:15,125 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-01-11 02:12:15,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-01-11 02:12:15,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:12:15,126 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-01-11 02:12:15,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 02:12:15,127 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:12:15,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:12:15,130 INFO L85 PathProgramCache]: Analyzing trace with hash 89737510, now seen corresponding path program 1 times [2022-01-11 02:12:15,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:12:15,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066350125] [2022-01-11 02:12:15,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:12:15,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:12:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:12:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:12:15,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:12:15,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066350125] [2022-01-11 02:12:15,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066350125] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:12:15,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:12:15,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 02:12:15,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135282440] [2022-01-11 02:12:15,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:12:15,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 02:12:15,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:12:15,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 02:12:15,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:12:15,272 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:12:15,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:12:15,288 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-01-11 02:12:15,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 02:12:15,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-01-11 02:12:15,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:12:15,289 INFO L225 Difference]: With dead ends: 24 [2022-01-11 02:12:15,289 INFO L226 Difference]: Without dead ends: 21 [2022-01-11 02:12:15,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:12:15,291 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:12:15,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 25 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:12:15,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-11 02:12:15,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2022-01-11 02:12:15,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:12:15,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-01-11 02:12:15,295 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 5 [2022-01-11 02:12:15,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:12:15,296 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-01-11 02:12:15,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:12:15,296 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-01-11 02:12:15,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-11 02:12:15,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:12:15,296 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:12:15,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 02:12:15,297 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:12:15,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:12:15,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1932057985, now seen corresponding path program 1 times [2022-01-11 02:12:15,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:12:15,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498338785] [2022-01-11 02:12:15,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:12:15,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:12:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:12:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:12:15,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:12:15,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498338785] [2022-01-11 02:12:15,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498338785] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:12:15,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:12:15,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 02:12:15,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202722143] [2022-01-11 02:12:15,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:12:15,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 02:12:15,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:12:15,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 02:12:15,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:12:15,361 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:12:15,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:12:15,389 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2022-01-11 02:12:15,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 02:12:15,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-01-11 02:12:15,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:12:15,391 INFO L225 Difference]: With dead ends: 31 [2022-01-11 02:12:15,391 INFO L226 Difference]: Without dead ends: 20 [2022-01-11 02:12:15,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:12:15,392 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:12:15,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 24 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:12:15,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-11 02:12:15,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2022-01-11 02:12:15,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:12:15,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-01-11 02:12:15,397 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2022-01-11 02:12:15,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:12:15,397 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-01-11 02:12:15,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:12:15,397 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-01-11 02:12:15,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-11 02:12:15,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:12:15,398 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:12:15,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-11 02:12:15,398 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:12:15,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:12:15,399 INFO L85 PathProgramCache]: Analyzing trace with hash 737911641, now seen corresponding path program 1 times [2022-01-11 02:12:15,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:12:15,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462644346] [2022-01-11 02:12:15,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:12:15,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:12:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:12:15,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:12:15,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:12:15,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462644346] [2022-01-11 02:12:15,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462644346] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:12:15,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:12:15,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 02:12:15,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208813652] [2022-01-11 02:12:15,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:12:15,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 02:12:15,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:12:15,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 02:12:15,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:12:15,541 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:12:15,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:12:15,569 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2022-01-11 02:12:15,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 02:12:15,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-01-11 02:12:15,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:12:15,570 INFO L225 Difference]: With dead ends: 31 [2022-01-11 02:12:15,570 INFO L226 Difference]: Without dead ends: 19 [2022-01-11 02:12:15,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:12:15,572 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:12:15,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 24 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:12:15,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-11 02:12:15,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2022-01-11 02:12:15,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:12:15,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-01-11 02:12:15,576 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2022-01-11 02:12:15,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:12:15,576 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-01-11 02:12:15,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:12:15,577 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-01-11 02:12:15,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-11 02:12:15,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:12:15,577 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:12:15,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-11 02:12:15,578 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:12:15,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:12:15,578 INFO L85 PathProgramCache]: Analyzing trace with hash 251376084, now seen corresponding path program 1 times [2022-01-11 02:12:15,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:12:15,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656136630] [2022-01-11 02:12:15,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:12:15,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:12:15,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:12:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:12:15,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:12:15,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656136630] [2022-01-11 02:12:15,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656136630] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:12:15,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:12:15,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 02:12:15,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552268528] [2022-01-11 02:12:15,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:12:15,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 02:12:15,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:12:15,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 02:12:15,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:12:15,679 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:12:15,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:12:15,696 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-01-11 02:12:15,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 02:12:15,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-01-11 02:12:15,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:12:15,698 INFO L225 Difference]: With dead ends: 31 [2022-01-11 02:12:15,698 INFO L226 Difference]: Without dead ends: 18 [2022-01-11 02:12:15,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:12:15,700 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:12:15,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 24 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:12:15,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-11 02:12:15,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-01-11 02:12:15,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:12:15,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-01-11 02:12:15,704 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 14 [2022-01-11 02:12:15,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:12:15,704 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-01-11 02:12:15,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:12:15,705 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-01-11 02:12:15,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-11 02:12:15,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:12:15,705 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:12:15,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-11 02:12:15,706 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:12:15,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:12:15,706 INFO L85 PathProgramCache]: Analyzing trace with hash 803118289, now seen corresponding path program 1 times [2022-01-11 02:12:15,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:12:15,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668964937] [2022-01-11 02:12:15,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:12:15,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:12:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:12:15,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:12:15,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:12:15,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668964937] [2022-01-11 02:12:15,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668964937] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:12:15,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829742407] [2022-01-11 02:12:15,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:12:15,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:12:15,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:12:15,762 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 02:12:15,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 02:12:15,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:12:15,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-11 02:12:15,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:12:16,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:12:16,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:12:16,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:12:16,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829742407] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:12:16,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:12:16,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 8] total 15 [2022-01-11 02:12:16,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940848921] [2022-01-11 02:12:16,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:12:16,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-11 02:12:16,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:12:16,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-11 02:12:16,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-01-11 02:12:16,662 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:12:17,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:12:17,553 INFO L93 Difference]: Finished difference Result 83 states and 110 transitions. [2022-01-11 02:12:17,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-11 02:12:17,553 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 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 16 [2022-01-11 02:12:17,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:12:17,554 INFO L225 Difference]: With dead ends: 83 [2022-01-11 02:12:17,554 INFO L226 Difference]: Without dead ends: 62 [2022-01-11 02:12:17,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2022-01-11 02:12:17,556 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 55 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 02:12:17,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 36 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 02:12:17,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-11 02:12:17,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 23. [2022-01-11 02:12:17,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:12:17,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-01-11 02:12:17,562 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2022-01-11 02:12:17,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:12:17,562 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-01-11 02:12:17,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:12:17,563 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-01-11 02:12:17,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-11 02:12:17,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:12:17,563 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:12:17,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-11 02:12:17,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-11 02:12:17,786 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:12:17,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:12:17,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1676551608, now seen corresponding path program 2 times [2022-01-11 02:12:17,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:12:17,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033812898] [2022-01-11 02:12:17,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:12:17,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:12:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:12:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-11 02:12:17,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:12:17,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033812898] [2022-01-11 02:12:17,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033812898] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:12:17,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866129606] [2022-01-11 02:12:17,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 02:12:17,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:12:17,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:12:17,874 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 02:12:17,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 02:12:17,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 02:12:17,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:12:17,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-11 02:12:17,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:12:18,030 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-11 02:12:18,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:12:18,270 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-11 02:12:18,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866129606] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:12:18,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:12:18,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 12 [2022-01-11 02:12:18,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772822202] [2022-01-11 02:12:18,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:12:18,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-11 02:12:18,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:12:18,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-11 02:12:18,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-01-11 02:12:18,272 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:12:18,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:12:18,824 INFO L93 Difference]: Finished difference Result 179 states and 209 transitions. [2022-01-11 02:12:18,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-11 02:12:18,825 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-11 02:12:18,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:12:18,826 INFO L225 Difference]: With dead ends: 179 [2022-01-11 02:12:18,826 INFO L226 Difference]: Without dead ends: 159 [2022-01-11 02:12:18,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=248, Invalid=508, Unknown=0, NotChecked=0, Total=756 [2022-01-11 02:12:18,827 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 201 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 02:12:18,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 75 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 02:12:18,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-11 02:12:18,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2022-01-11 02:12:18,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.1452991452991452) internal successors, (134), 117 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:12:18,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 134 transitions. [2022-01-11 02:12:18,859 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 134 transitions. Word has length 22 [2022-01-11 02:12:18,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:12:18,859 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 134 transitions. [2022-01-11 02:12:18,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:12:18,859 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 134 transitions. [2022-01-11 02:12:18,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-11 02:12:18,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:12:18,862 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 8, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-01-11 02:12:18,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-11 02:12:19,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-01-11 02:12:19,076 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:12:19,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:12:19,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1054229874, now seen corresponding path program 3 times [2022-01-11 02:12:19,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:12:19,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9655336] [2022-01-11 02:12:19,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:12:19,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:12:19,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:12:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1420 backedges. 550 proven. 1 refuted. 0 times theorem prover too weak. 869 trivial. 0 not checked. [2022-01-11 02:12:19,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:12:19,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9655336] [2022-01-11 02:12:19,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9655336] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:12:19,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999436091] [2022-01-11 02:12:19,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 02:12:19,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:12:19,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:12:19,343 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 02:12:19,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 02:12:19,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-01-11 02:12:19,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:12:19,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-11 02:12:19,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:12:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1420 backedges. 313 proven. 86 refuted. 0 times theorem prover too weak. 1021 trivial. 0 not checked. [2022-01-11 02:12:30,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:12:34,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1420 backedges. 322 proven. 16 refuted. 0 times theorem prover too weak. 1082 trivial. 0 not checked. [2022-01-11 02:12:34,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999436091] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:12:34,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:12:34,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 9] total 17 [2022-01-11 02:12:34,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331092912] [2022-01-11 02:12:34,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:12:34,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-11 02:12:34,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:12:34,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-11 02:12:34,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=203, Unknown=1, NotChecked=0, Total=272 [2022-01-11 02:12:34,910 INFO L87 Difference]: Start difference. First operand 118 states and 134 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:12:42,144 WARN L228 SmtUtils]: Spent 6.97s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-11 02:13:08,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:13:08,763 INFO L93 Difference]: Finished difference Result 516 states and 644 transitions. [2022-01-11 02:13:08,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-11 02:13:08,764 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 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 117 [2022-01-11 02:13:08,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:13:08,766 INFO L225 Difference]: With dead ends: 516 [2022-01-11 02:13:08,766 INFO L226 Difference]: Without dead ends: 402 [2022-01-11 02:13:08,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 39.3s TimeCoverageRelationStatistics Valid=353, Invalid=1125, Unknown=4, NotChecked=0, Total=1482 [2022-01-11 02:13:08,770 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 100 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-11 02:13:08,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 60 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 94 Invalid, 0 Unknown, 40 Unchecked, 1.7s Time] [2022-01-11 02:13:08,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-01-11 02:13:08,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 378. [2022-01-11 02:13:08,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 1.1193633952254642) internal successors, (422), 377 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:13:08,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 422 transitions. [2022-01-11 02:13:08,860 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 422 transitions. Word has length 117 [2022-01-11 02:13:08,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:13:08,861 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 422 transitions. [2022-01-11 02:13:08,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:13:08,861 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 422 transitions. [2022-01-11 02:13:08,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-01-11 02:13:08,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:13:08,865 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1] [2022-01-11 02:13:08,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-11 02:13:09,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:13:09,070 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:13:09,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:13:09,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1384391398, now seen corresponding path program 4 times [2022-01-11 02:13:09,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:13:09,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404819297] [2022-01-11 02:13:09,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:13:09,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:13:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:13:09,704 INFO L134 CoverageAnalysis]: Checked inductivity of 11282 backedges. 2486 proven. 89 refuted. 0 times theorem prover too weak. 8707 trivial. 0 not checked. [2022-01-11 02:13:09,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:13:09,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404819297] [2022-01-11 02:13:09,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404819297] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:13:09,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532107528] [2022-01-11 02:13:09,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-11 02:13:09,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:13:09,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:13:09,707 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 02:13:09,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-11 02:13:09,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-11 02:13:09,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:13:09,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 1378 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-11 02:13:09,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:13:12,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11282 backedges. 2486 proven. 89 refuted. 0 times theorem prover too weak. 8707 trivial. 0 not checked. [2022-01-11 02:13:12,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:13:13,936 INFO L134 CoverageAnalysis]: Checked inductivity of 11282 backedges. 6070 proven. 1513 refuted. 0 times theorem prover too weak. 3699 trivial. 0 not checked. [2022-01-11 02:13:13,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532107528] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:13:13,936 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:13:13,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 8] total 15 [2022-01-11 02:13:13,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740882929] [2022-01-11 02:13:13,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:13:13,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-11 02:13:13,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:13:13,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-11 02:13:13,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=155, Unknown=1, NotChecked=0, Total=210 [2022-01-11 02:13:13,938 INFO L87 Difference]: Start difference. First operand 378 states and 422 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:13:17,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:13:17,423 INFO L93 Difference]: Finished difference Result 2168 states and 2444 transitions. [2022-01-11 02:13:17,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-11 02:13:17,423 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 281 [2022-01-11 02:13:17,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:13:17,429 INFO L225 Difference]: With dead ends: 2168 [2022-01-11 02:13:17,429 INFO L226 Difference]: Without dead ends: 1347 [2022-01-11 02:13:17,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=237, Invalid=632, Unknown=1, NotChecked=0, Total=870 [2022-01-11 02:13:17,432 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 60 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:13:17,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 176 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 139 Invalid, 0 Unknown, 8 Unchecked, 1.0s Time] [2022-01-11 02:13:17,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2022-01-11 02:13:17,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1304. [2022-01-11 02:13:17,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1303 states have (on average 1.1158864159631618) internal successors, (1454), 1303 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:13:17,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1454 transitions. [2022-01-11 02:13:17,748 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1454 transitions. Word has length 281 [2022-01-11 02:13:17,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:13:17,748 INFO L470 AbstractCegarLoop]: Abstraction has 1304 states and 1454 transitions. [2022-01-11 02:13:17,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:13:17,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1454 transitions. [2022-01-11 02:13:17,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2022-01-11 02:13:17,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:13:17,759 INFO L514 BasicCegarLoop]: trace histogram [210, 210, 35, 35, 35, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1] [2022-01-11 02:13:17,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-11 02:13:17,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:13:17,983 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:13:17,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:13:17,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1201418543, now seen corresponding path program 5 times [2022-01-11 02:13:17,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:13:17,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133165224] [2022-01-11 02:13:17,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:13:17,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:13:19,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:13:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 53443 backedges. 23137 proven. 2626 refuted. 0 times theorem prover too weak. 27680 trivial. 0 not checked. [2022-01-11 02:13:20,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:13:20,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133165224] [2022-01-11 02:13:20,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133165224] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:13:20,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176145552] [2022-01-11 02:13:20,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-11 02:13:20,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:13:20,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:13:20,199 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 02:13:20,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process