/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/loops-crafted-1/nested3-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 02:09:59,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 02:09:59,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 02:09:59,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 02:09:59,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 02:09:59,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 02:09:59,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 02:09:59,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 02:09:59,912 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 02:09:59,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 02:09:59,913 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 02:09:59,927 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 02:09:59,927 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 02:09:59,928 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 02:09:59,929 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 02:09:59,930 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 02:09:59,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 02:09:59,933 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 02:09:59,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 02:09:59,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 02:09:59,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 02:09:59,941 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 02:09:59,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 02:09:59,942 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 02:09:59,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 02:09:59,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 02:09:59,944 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 02:09:59,945 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 02:09:59,945 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 02:09:59,945 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 02:09:59,945 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 02:09:59,946 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 02:09:59,946 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 02:09:59,947 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 02:09:59,947 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 02:09:59,947 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 02:09:59,948 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 02:09:59,948 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 02:09:59,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 02:09:59,948 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 02:09:59,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 02:09:59,953 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 02:09:59,972 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 02:09:59,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 02:09:59,972 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 02:09:59,972 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 02:09:59,973 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 02:09:59,973 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 02:09:59,973 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 02:09:59,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 02:09:59,973 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 02:09:59,973 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 02:09:59,974 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 02:09:59,974 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 02:09:59,974 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 02:09:59,974 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 02:09:59,974 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 02:09:59,974 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 02:09:59,974 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 02:09:59,974 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 02:09:59,974 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 02:09:59,974 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 02:09:59,974 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 02:09:59,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 02:09:59,975 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 02:09:59,975 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 02:09:59,975 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 02:09:59,975 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 02:09:59,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 02:09:59,975 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 02:09:59,975 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 02:09:59,975 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 02:09:59,975 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 02:09:59,975 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 02:09:59,976 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 02:09:59,976 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 02:10:00,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 02:10:00,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 02:10:00,169 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 02:10:00,170 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 02:10:00,171 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 02:10:00,172 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested3-2.c [2022-01-11 02:10:00,215 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0201980e/07b279edaa1a49a09dd2fc89f5f89ae4/FLAGeabf0803b [2022-01-11 02:10:00,564 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 02:10:00,565 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-2.c [2022-01-11 02:10:00,568 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0201980e/07b279edaa1a49a09dd2fc89f5f89ae4/FLAGeabf0803b [2022-01-11 02:10:01,028 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0201980e/07b279edaa1a49a09dd2fc89f5f89ae4 [2022-01-11 02:10:01,030 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 02:10:01,031 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 02:10:01,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 02:10:01,032 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 02:10:01,034 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 02:10:01,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 02:10:01" (1/1) ... [2022-01-11 02:10:01,035 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a9d0116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:10:01, skipping insertion in model container [2022-01-11 02:10:01,035 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 02:10:01" (1/1) ... [2022-01-11 02:10:01,039 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 02:10:01,046 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 02:10:01,160 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-2.c[321,334] [2022-01-11 02:10:01,167 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 02:10:01,173 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 02:10:01,180 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-2.c[321,334] [2022-01-11 02:10:01,182 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 02:10:01,191 INFO L208 MainTranslator]: Completed translation [2022-01-11 02:10:01,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:10:01 WrapperNode [2022-01-11 02:10:01,191 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 02:10:01,192 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 02:10:01,192 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 02:10:01,192 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 02:10:01,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:10:01" (1/1) ... [2022-01-11 02:10:01,201 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:10:01" (1/1) ... [2022-01-11 02:10:01,211 INFO L137 Inliner]: procedures = 12, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 60 [2022-01-11 02:10:01,211 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 02:10:01,211 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 02:10:01,211 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 02:10:01,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 02:10:01,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:10:01" (1/1) ... [2022-01-11 02:10:01,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:10:01" (1/1) ... [2022-01-11 02:10:01,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:10:01" (1/1) ... [2022-01-11 02:10:01,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:10:01" (1/1) ... [2022-01-11 02:10:01,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:10:01" (1/1) ... [2022-01-11 02:10:01,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:10:01" (1/1) ... [2022-01-11 02:10:01,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:10:01" (1/1) ... [2022-01-11 02:10:01,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 02:10:01,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 02:10:01,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 02:10:01,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 02:10:01,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:10:01" (1/1) ... [2022-01-11 02:10:01,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 02:10:01,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:10:01,251 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 02:10:01,258 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 02:10:01,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 02:10:01,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 02:10:01,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 02:10:01,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 02:10:01,312 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 02:10:01,313 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 02:10:01,395 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 02:10:01,399 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 02:10:01,399 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-11 02:10:01,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:10:01 BoogieIcfgContainer [2022-01-11 02:10:01,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 02:10:01,401 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 02:10:01,401 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 02:10:01,402 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 02:10:01,404 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:10:01" (1/1) ... [2022-01-11 02:10:01,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 02:10:01 BasicIcfg [2022-01-11 02:10:01,441 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 02:10:01,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 02:10:01,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 02:10:01,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 02:10:01,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 02:10:01" (1/4) ... [2022-01-11 02:10:01,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef141ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:10:01, skipping insertion in model container [2022-01-11 02:10:01,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:10:01" (2/4) ... [2022-01-11 02:10:01,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef141ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:10:01, skipping insertion in model container [2022-01-11 02:10:01,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:10:01" (3/4) ... [2022-01-11 02:10:01,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef141ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 02:10:01, skipping insertion in model container [2022-01-11 02:10:01,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 02:10:01" (4/4) ... [2022-01-11 02:10:01,448 INFO L111 eAbstractionObserver]: Analyzing ICFG nested3-2.cTransformedIcfg [2022-01-11 02:10:01,452 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 02:10:01,452 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-01-11 02:10:01,485 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 02:10:01,489 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 02:10:01,489 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-11 02:10:01,511 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 19 states have (on average 1.631578947368421) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states 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 02:10:01,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-01-11 02:10:01,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:10:01,515 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-01-11 02:10:01,515 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:10:01,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:10:01,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1098965845, now seen corresponding path program 1 times [2022-01-11 02:10:01,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:10:01,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116373709] [2022-01-11 02:10:01,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:10:01,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:10:01,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:10:01,645 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 02:10:01,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:10:01,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116373709] [2022-01-11 02:10:01,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116373709] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:10:01,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:10:01,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 02:10:01,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822182998] [2022-01-11 02:10:01,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:10:01,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-11 02:10:01,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:10:01,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-11 02:10:01,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 02:10:01,679 INFO L87 Difference]: Start difference. First operand has 23 states, 19 states have (on average 1.631578947368421) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states 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 02:10:01,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:10:01,694 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2022-01-11 02:10:01,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-11 02:10:01,696 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-01-11 02:10:01,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:10:01,700 INFO L225 Difference]: With dead ends: 44 [2022-01-11 02:10:01,700 INFO L226 Difference]: Without dead ends: 19 [2022-01-11 02:10:01,703 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 02:10:01,706 INFO L933 BasicCegarLoop]: 25 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, 25 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 02:10:01,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:10:01,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-11 02:10:01,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-01-11 02:10:01,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states 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 02:10:01,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-01-11 02:10:01,734 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 6 [2022-01-11 02:10:01,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:10:01,735 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-01-11 02:10:01,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states 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 02:10:01,736 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-01-11 02:10:01,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-01-11 02:10:01,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:10:01,737 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-01-11 02:10:01,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 02:10:01,738 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:10:01,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:10:01,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1098936054, now seen corresponding path program 1 times [2022-01-11 02:10:01,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:10:01,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487888311] [2022-01-11 02:10:01,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:10:01,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:10:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:10:01,819 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 02:10:01,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:10:01,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487888311] [2022-01-11 02:10:01,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487888311] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:10:01,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:10:01,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 02:10:01,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794429773] [2022-01-11 02:10:01,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:10:01,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 02:10:01,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:10:01,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 02:10:01,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:10:01,823 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states 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 02:10:01,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:10:01,846 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-01-11 02:10:01,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 02:10:01,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-01-11 02:10:01,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:10:01,847 INFO L225 Difference]: With dead ends: 36 [2022-01-11 02:10:01,847 INFO L226 Difference]: Without dead ends: 32 [2022-01-11 02:10:01,848 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 02:10:01,849 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 35 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 02:10:01,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 35 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:10:01,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-11 02:10:01,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2022-01-11 02:10:01,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states 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 02:10:01,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-01-11 02:10:01,852 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 6 [2022-01-11 02:10:01,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:10:01,852 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-01-11 02:10:01,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states 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 02:10:01,853 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-01-11 02:10:01,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-01-11 02:10:01,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:10:01,853 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:10:01,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 02:10:01,853 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:10:01,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:10:01,854 INFO L85 PathProgramCache]: Analyzing trace with hash 293705912, now seen corresponding path program 1 times [2022-01-11 02:10:01,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:10:01,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494802881] [2022-01-11 02:10:01,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:10:01,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:10:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:10:01,900 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 02:10:01,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:10:01,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494802881] [2022-01-11 02:10:01,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494802881] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:10:01,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:10:01,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 02:10:01,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791775388] [2022-01-11 02:10:01,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:10:01,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 02:10:01,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:10:01,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 02:10:01,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:10:01,903 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states 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 02:10:01,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:10:01,922 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-01-11 02:10:01,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 02:10:01,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-01-11 02:10:01,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:10:01,924 INFO L225 Difference]: With dead ends: 44 [2022-01-11 02:10:01,924 INFO L226 Difference]: Without dead ends: 27 [2022-01-11 02:10:01,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:10:01,929 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:10:01,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:10:01,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-11 02:10:01,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2022-01-11 02:10:01,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states 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 02:10:01,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-01-11 02:10:01,937 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 7 [2022-01-11 02:10:01,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:10:01,937 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-01-11 02:10:01,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states 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 02:10:01,938 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-01-11 02:10:01,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-11 02:10:01,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:10:01,939 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:10:01,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-11 02:10:01,939 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:10:01,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:10:01,940 INFO L85 PathProgramCache]: Analyzing trace with hash 515933904, now seen corresponding path program 1 times [2022-01-11 02:10:01,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:10:01,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733753415] [2022-01-11 02:10:01,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:10:01,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:10:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:10:01,980 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 02:10:01,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:10:01,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733753415] [2022-01-11 02:10:01,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733753415] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:10:01,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:10:01,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 02:10:01,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824821963] [2022-01-11 02:10:01,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:10:01,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 02:10:01,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:10:01,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 02:10:01,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:10:01,983 INFO L87 Difference]: Start difference. First operand 21 states and 23 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 02:10:01,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:10:01,995 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-01-11 02:10:01,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 02:10:01,995 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 02:10:01,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:10:01,996 INFO L225 Difference]: With dead ends: 41 [2022-01-11 02:10:01,996 INFO L226 Difference]: Without dead ends: 23 [2022-01-11 02:10:01,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:10:02,002 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:10:02,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:10:02,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-11 02:10:02,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-01-11 02:10:02,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.263157894736842) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states 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 02:10:02,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-01-11 02:10:02,005 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 8 [2022-01-11 02:10:02,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:10:02,005 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-01-11 02:10:02,005 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 02:10:02,006 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-01-11 02:10:02,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-11 02:10:02,006 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:10:02,006 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:10:02,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-11 02:10:02,006 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:10:02,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:10:02,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1185207968, now seen corresponding path program 1 times [2022-01-11 02:10:02,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:10:02,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589933950] [2022-01-11 02:10:02,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:10:02,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:10:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:10:02,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:10:02,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:10:02,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589933950] [2022-01-11 02:10:02,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589933950] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:10:02,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142682853] [2022-01-11 02:10:02,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:10:02,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:10:02,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:10:02,084 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 02:10:02,134 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 02:10:02,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:10:02,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-11 02:10:02,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:10:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:10:02,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:10:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:10:02,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142682853] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:10:02,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:10:02,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-11 02:10:02,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645627227] [2022-01-11 02:10:02,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:10:02,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-11 02:10:02,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:10:02,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-11 02:10:02,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-11 02:10:02,237 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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 02:10:02,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:10:02,280 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-01-11 02:10:02,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-11 02:10:02,284 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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 9 [2022-01-11 02:10:02,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:10:02,286 INFO L225 Difference]: With dead ends: 45 [2022-01-11 02:10:02,286 INFO L226 Difference]: Without dead ends: 26 [2022-01-11 02:10:02,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2022-01-11 02:10:02,289 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:10:02,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 52 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:10:02,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-11 02:10:02,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-01-11 02:10:02,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states 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 02:10:02,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-01-11 02:10:02,292 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 9 [2022-01-11 02:10:02,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:10:02,292 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-01-11 02:10:02,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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 02:10:02,292 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-01-11 02:10:02,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-11 02:10:02,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:10:02,293 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:10:02,325 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 02:10:02,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:10:02,511 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:10:02,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:10:02,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1100786384, now seen corresponding path program 2 times [2022-01-11 02:10:02,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:10:02,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086380572] [2022-01-11 02:10:02,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:10:02,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:10:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:10:02,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:10:02,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:10:02,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086380572] [2022-01-11 02:10:02,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086380572] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:10:02,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443135919] [2022-01-11 02:10:02,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 02:10:02,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:10:02,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:10:02,614 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 02:10:02,642 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 02:10:02,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 02:10:02,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:10:02,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-11 02:10:02,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:10:03,247 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:10:03,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:10:03,418 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:10:03,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443135919] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:10:03,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:10:03,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-11 02:10:03,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830150542] [2022-01-11 02:10:03,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:10:03,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-11 02:10:03,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:10:03,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-11 02:10:03,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-01-11 02:10:03,420 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states 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 02:10:03,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:10:03,612 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2022-01-11 02:10:03,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-11 02:10:03,614 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 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 12 [2022-01-11 02:10:03,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:10:03,614 INFO L225 Difference]: With dead ends: 52 [2022-01-11 02:10:03,614 INFO L226 Difference]: Without dead ends: 30 [2022-01-11 02:10:03,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2022-01-11 02:10:03,615 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 16 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:10:03,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 115 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2022-01-11 02:10:03,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-11 02:10:03,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-11 02:10:03,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 02:10:03,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-01-11 02:10:03,620 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 12 [2022-01-11 02:10:03,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:10:03,620 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-01-11 02:10:03,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states 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 02:10:03,620 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-01-11 02:10:03,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-11 02:10:03,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:10:03,621 INFO L514 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:10:03,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-11 02:10:03,821 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,SelfDestructingSolverStorable5 [2022-01-11 02:10:03,821 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:10:03,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:10:03,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1491213984, now seen corresponding path program 3 times [2022-01-11 02:10:03,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:10:03,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091179638] [2022-01-11 02:10:03,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:10:03,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:10:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:10:04,006 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:10:04,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:10:04,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091179638] [2022-01-11 02:10:04,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091179638] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:10:04,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592048917] [2022-01-11 02:10:04,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 02:10:04,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:10:04,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:10:04,016 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 02:10:04,018 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 02:10:04,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-11 02:10:04,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:10:04,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-11 02:10:04,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:10:38,960 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:10:38,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:10:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:10:39,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592048917] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:10:39,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:10:39,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-01-11 02:10:39,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919479514] [2022-01-11 02:10:39,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:10:39,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-11 02:10:39,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:10:39,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-11 02:10:39,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=642, Unknown=15, NotChecked=0, Total=930 [2022-01-11 02:10:39,373 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 02:10:43,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:10:43,130 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2022-01-11 02:10:43,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-11 02:10:43,131 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 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 17 [2022-01-11 02:10:43,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:10:43,131 INFO L225 Difference]: With dead ends: 68 [2022-01-11 02:10:43,131 INFO L226 Difference]: Without dead ends: 41 [2022-01-11 02:10:43,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 37.3s TimeCoverageRelationStatistics Valid=548, Invalid=1077, Unknown=15, NotChecked=0, Total=1640 [2022-01-11 02:10:43,132 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 85 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 02:10:43,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 196 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 54 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-01-11 02:10:43,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-11 02:10:43,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-01-11 02:10:43,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 02:10:43,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-01-11 02:10:43,140 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 17 [2022-01-11 02:10:43,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:10:43,140 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-01-11 02:10:43,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 02:10:43,140 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-01-11 02:10:43,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-11 02:10:43,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:10:43,141 INFO L514 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:10:43,144 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 02:10:43,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:10:43,344 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:10:43,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:10:43,345 INFO L85 PathProgramCache]: Analyzing trace with hash -599619744, now seen corresponding path program 4 times [2022-01-11 02:10:43,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:10:43,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671725603] [2022-01-11 02:10:43,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:10:43,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:10:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:10:43,784 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:10:43,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:10:43,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671725603] [2022-01-11 02:10:43,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671725603] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:10:43,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349586153] [2022-01-11 02:10:43,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-11 02:10:43,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:10:43,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:10:43,786 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 02:10:43,820 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 02:10:43,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-11 02:10:43,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:10:43,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 59 conjunts are in the unsatisfiable core [2022-01-11 02:10:43,907 INFO L286 TraceCheckSpWp]: Computing forward predicates...