/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_LAZY.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested3-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 14:32:08,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 14:32:08,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 14:32:08,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 14:32:08,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 14:32:08,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 14:32:08,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 14:32:08,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 14:32:08,163 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 14:32:08,167 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 14:32:08,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 14:32:08,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 14:32:08,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 14:32:08,178 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 14:32:08,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 14:32:08,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 14:32:08,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 14:32:08,183 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 14:32:08,183 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 14:32:08,184 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 14:32:08,184 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 14:32:08,187 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 14:32:08,187 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 14:32:08,190 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 14:32:08,192 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 14:32:08,192 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 14:32:08,193 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 14:32:08,193 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 14:32:08,194 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 14:32:08,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 14:32:08,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 14:32:08,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 14:32:08,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 14:32:08,197 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 14:32:08,226 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 14:32:08,226 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 14:32:08,227 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 14:32:08,227 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 14:32:08,228 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 14:32:08,228 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 14:32:08,228 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 14:32:08,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 14:32:08,229 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 14:32:08,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 14:32:08,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 14:32:08,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 14:32:08,230 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 14:32:08,230 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 14:32:08,230 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 14:32:08,230 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 14:32:08,230 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 14:32:08,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 14:32:08,231 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 14:32:08,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 14:32:08,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 14:32:08,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 14:32:08,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 14:32:08,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 14:32:08,231 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 14:32:08,232 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 14:32:08,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 14:32:08,232 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 14:32:08,232 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 14:32:08,232 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 14:32:08,232 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 14:32:08,232 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 14:32:08,234 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 14:32:08,234 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 14:32:08,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 14:32:08,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 14:32:08,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 14:32:08,432 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 14:32:08,435 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 14:32:08,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested3-1.c [2022-01-10 14:32:08,480 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2ae543cc/1909f1588f3f4447b9446abb5c1fe941/FLAGa2fcfde5c [2022-01-10 14:32:08,781 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 14:32:08,781 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-1.c [2022-01-10 14:32:08,786 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2ae543cc/1909f1588f3f4447b9446abb5c1fe941/FLAGa2fcfde5c [2022-01-10 14:32:09,210 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2ae543cc/1909f1588f3f4447b9446abb5c1fe941 [2022-01-10 14:32:09,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 14:32:09,217 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 14:32:09,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 14:32:09,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 14:32:09,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 14:32:09,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:32:09" (1/1) ... [2022-01-10 14:32:09,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67def898 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:09, skipping insertion in model container [2022-01-10 14:32:09,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:32:09" (1/1) ... [2022-01-10 14:32:09,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 14:32:09,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 14:32:09,358 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/nested3-1.c[321,334] [2022-01-10 14:32:09,369 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 14:32:09,376 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 14:32:09,386 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/nested3-1.c[321,334] [2022-01-10 14:32:09,389 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 14:32:09,399 INFO L208 MainTranslator]: Completed translation [2022-01-10 14:32:09,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:09 WrapperNode [2022-01-10 14:32:09,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 14:32:09,400 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 14:32:09,401 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 14:32:09,401 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 14:32:09,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:09" (1/1) ... [2022-01-10 14:32:09,426 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:09" (1/1) ... [2022-01-10 14:32:09,446 INFO L137 Inliner]: procedures = 12, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 60 [2022-01-10 14:32:09,446 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 14:32:09,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 14:32:09,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 14:32:09,447 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 14:32:09,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:09" (1/1) ... [2022-01-10 14:32:09,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:09" (1/1) ... [2022-01-10 14:32:09,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:09" (1/1) ... [2022-01-10 14:32:09,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:09" (1/1) ... [2022-01-10 14:32:09,475 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:09" (1/1) ... [2022-01-10 14:32:09,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:09" (1/1) ... [2022-01-10 14:32:09,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:09" (1/1) ... [2022-01-10 14:32:09,480 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 14:32:09,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 14:32:09,481 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 14:32:09,481 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 14:32:09,485 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:09" (1/1) ... [2022-01-10 14:32:09,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 14:32:09,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:32:09,516 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 14:32:09,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 14:32:09,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 14:32:09,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 14:32:09,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 14:32:09,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 14:32:09,599 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 14:32:09,600 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 14:32:09,703 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 14:32:09,708 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 14:32:09,708 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-10 14:32:09,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:32:09 BoogieIcfgContainer [2022-01-10 14:32:09,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 14:32:09,713 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 14:32:09,713 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 14:32:09,723 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 14:32:09,725 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:32:09" (1/1) ... [2022-01-10 14:32:09,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 02:32:09 BasicIcfg [2022-01-10 14:32:09,811 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 14:32:09,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 14:32:09,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 14:32:09,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 14:32:09,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:32:09" (1/4) ... [2022-01-10 14:32:09,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f79d6e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:32:09, skipping insertion in model container [2022-01-10 14:32:09,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:09" (2/4) ... [2022-01-10 14:32:09,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f79d6e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:32:09, skipping insertion in model container [2022-01-10 14:32:09,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:32:09" (3/4) ... [2022-01-10 14:32:09,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f79d6e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 02:32:09, skipping insertion in model container [2022-01-10 14:32:09,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 02:32:09" (4/4) ... [2022-01-10 14:32:09,824 INFO L111 eAbstractionObserver]: Analyzing ICFG nested3-1.cTransformedIcfg [2022-01-10 14:32:09,828 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 14:32:09,828 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-01-10 14:32:09,883 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 14:32:09,893 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 14:32:09,893 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-10 14:32:09,906 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) [2022-01-10 14:32:09,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-01-10 14:32:09,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:32:09,911 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-01-10 14:32:09,912 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:32:09,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:32:09,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1098965845, now seen corresponding path program 1 times [2022-01-10 14:32:09,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:32:09,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568486337] [2022-01-10 14:32:09,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:32:09,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:32:10,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:32:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 14:32:10,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:32:10,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568486337] [2022-01-10 14:32:10,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568486337] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:32:10,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:32:10,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 14:32:10,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302504958] [2022-01-10 14:32:10,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:32:10,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 14:32:10,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:32:10,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 14:32:10,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 14:32:10,114 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) [2022-01-10 14:32:10,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:32:10,133 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2022-01-10 14:32:10,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 14:32:10,135 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 [2022-01-10 14:32:10,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:32:10,140 INFO L225 Difference]: With dead ends: 44 [2022-01-10 14:32:10,141 INFO L226 Difference]: Without dead ends: 19 [2022-01-10 14:32:10,144 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 [2022-01-10 14:32:10,148 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 [2022-01-10 14:32:10,148 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] [2022-01-10 14:32:10,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-10 14:32:10,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-01-10 14:32:10,177 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) [2022-01-10 14:32:10,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-01-10 14:32:10,180 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 6 [2022-01-10 14:32:10,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:32:10,181 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-01-10 14:32:10,181 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) [2022-01-10 14:32:10,182 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-01-10 14:32:10,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-01-10 14:32:10,183 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:32:10,183 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-01-10 14:32:10,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 14:32:10,184 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:32:10,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:32:10,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1098936054, now seen corresponding path program 1 times [2022-01-10 14:32:10,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:32:10,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676665890] [2022-01-10 14:32:10,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:32:10,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:32:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:32:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 14:32:10,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:32:10,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676665890] [2022-01-10 14:32:10,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676665890] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:32:10,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:32:10,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 14:32:10,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132491012] [2022-01-10 14:32:10,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:32:10,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 14:32:10,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:32:10,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 14:32:10,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 14:32:10,288 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) [2022-01-10 14:32:10,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:32:10,314 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-01-10 14:32:10,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 14:32:10,316 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 [2022-01-10 14:32:10,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:32:10,317 INFO L225 Difference]: With dead ends: 36 [2022-01-10 14:32:10,317 INFO L226 Difference]: Without dead ends: 32 [2022-01-10 14:32:10,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 14:32:10,318 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 [2022-01-10 14:32:10,319 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] [2022-01-10 14:32:10,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-10 14:32:10,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2022-01-10 14:32:10,325 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) [2022-01-10 14:32:10,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-01-10 14:32:10,326 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 6 [2022-01-10 14:32:10,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:32:10,326 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-01-10 14:32:10,326 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) [2022-01-10 14:32:10,326 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-01-10 14:32:10,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-01-10 14:32:10,327 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:32:10,327 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:32:10,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 14:32:10,327 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:32:10,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:32:10,328 INFO L85 PathProgramCache]: Analyzing trace with hash 293705912, now seen corresponding path program 1 times [2022-01-10 14:32:10,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:32:10,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108250665] [2022-01-10 14:32:10,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:32:10,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:32:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:32:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 14:32:10,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:32:10,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108250665] [2022-01-10 14:32:10,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108250665] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:32:10,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:32:10,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 14:32:10,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867634955] [2022-01-10 14:32:10,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:32:10,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 14:32:10,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:32:10,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 14:32:10,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 14:32:10,392 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) [2022-01-10 14:32:10,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:32:10,414 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-01-10 14:32:10,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 14:32:10,414 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 [2022-01-10 14:32:10,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:32:10,415 INFO L225 Difference]: With dead ends: 44 [2022-01-10 14:32:10,416 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 14:32:10,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 14:32:10,421 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 [2022-01-10 14:32:10,422 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] [2022-01-10 14:32:10,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 14:32:10,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2022-01-10 14:32:10,429 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) [2022-01-10 14:32:10,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-01-10 14:32:10,431 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 7 [2022-01-10 14:32:10,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:32:10,431 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-01-10 14:32:10,431 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) [2022-01-10 14:32:10,431 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-01-10 14:32:10,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-10 14:32:10,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:32:10,433 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:32:10,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 14:32:10,433 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:32:10,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:32:10,434 INFO L85 PathProgramCache]: Analyzing trace with hash 515933904, now seen corresponding path program 1 times [2022-01-10 14:32:10,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:32:10,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799974100] [2022-01-10 14:32:10,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:32:10,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:32:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:32:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 14:32:10,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:32:10,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799974100] [2022-01-10 14:32:10,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799974100] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:32:10,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:32:10,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 14:32:10,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155998814] [2022-01-10 14:32:10,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:32:10,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 14:32:10,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:32:10,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 14:32:10,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 14:32:10,492 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) [2022-01-10 14:32:10,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:32:10,500 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-01-10 14:32:10,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 14:32:10,502 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 [2022-01-10 14:32:10,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:32:10,503 INFO L225 Difference]: With dead ends: 41 [2022-01-10 14:32:10,503 INFO L226 Difference]: Without dead ends: 23 [2022-01-10 14:32:10,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 14:32:10,505 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 [2022-01-10 14:32:10,505 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] [2022-01-10 14:32:10,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-10 14:32:10,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-01-10 14:32:10,508 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) [2022-01-10 14:32:10,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-01-10 14:32:10,509 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 8 [2022-01-10 14:32:10,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:32:10,509 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-01-10 14:32:10,509 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) [2022-01-10 14:32:10,509 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-01-10 14:32:10,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-10 14:32:10,509 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:32:10,510 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:32:10,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 14:32:10,510 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:32:10,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:32:10,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1185207968, now seen corresponding path program 1 times [2022-01-10 14:32:10,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:32:10,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813894451] [2022-01-10 14:32:10,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:32:10,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:32:10,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:32:10,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 14:32:10,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:32:10,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813894451] [2022-01-10 14:32:10,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813894451] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:32:10,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436571568] [2022-01-10 14:32:10,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:32:10,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:32:10,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:32:10,593 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 14:32:10,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 14:32:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:32:10,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 14:32:10,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:32:10,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 14:32:10,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:32:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 14:32:10,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436571568] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:32:10,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:32:10,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-01-10 14:32:10,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732664296] [2022-01-10 14:32:10,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:32:10,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 14:32:10,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:32:10,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 14:32:10,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-10 14:32:10,753 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:32:10,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:32:10,798 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-01-10 14:32:10,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 14:32:10,800 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 [2022-01-10 14:32:10,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:32:10,801 INFO L225 Difference]: With dead ends: 45 [2022-01-10 14:32:10,801 INFO L226 Difference]: Without dead ends: 26 [2022-01-10 14:32:10,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-01-10 14:32:10,802 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:32:10,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 69 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:32:10,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-10 14:32:10,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-01-10 14:32:10,806 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) [2022-01-10 14:32:10,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-01-10 14:32:10,806 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 9 [2022-01-10 14:32:10,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:32:10,807 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-01-10 14:32:10,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:32:10,807 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-01-10 14:32:10,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 14:32:10,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:32:10,808 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:32:10,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 14:32:11,027 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 [2022-01-10 14:32:11,028 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:32:11,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:32:11,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1100786384, now seen corresponding path program 2 times [2022-01-10 14:32:11,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:32:11,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287558967] [2022-01-10 14:32:11,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:32:11,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:32:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:32:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 14:32:11,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:32:11,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287558967] [2022-01-10 14:32:11,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287558967] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:32:11,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872048340] [2022-01-10 14:32:11,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 14:32:11,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:32:11,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:32:11,146 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 14:32:11,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 14:32:11,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 14:32:11,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 14:32:11,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 14:32:11,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:32:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 14:32:11,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 14:32:11,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872048340] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:32:11,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 14:32:11,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2022-01-10 14:32:11,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470801576] [2022-01-10 14:32:11,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:32:11,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 14:32:11,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:32:11,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 14:32:11,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-10 14:32:11,443 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2022-01-10 14:32:11,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:32:11,494 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-01-10 14:32:11,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 14:32:11,495 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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 12 [2022-01-10 14:32:11,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:32:11,496 INFO L225 Difference]: With dead ends: 26 [2022-01-10 14:32:11,496 INFO L226 Difference]: Without dead ends: 24 [2022-01-10 14:32:11,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-01-10 14:32:11,501 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:32:11,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 51 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 8 Unchecked, 0.0s Time] [2022-01-10 14:32:11,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-10 14:32:11,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-01-10 14:32:11,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 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) [2022-01-10 14:32:11,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-01-10 14:32:11,510 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 12 [2022-01-10 14:32:11,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:32:11,510 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-01-10 14:32:11,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2022-01-10 14:32:11,511 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-01-10 14:32:11,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 14:32:11,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:32:11,511 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:32:11,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 14:32:11,735 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 [2022-01-10 14:32:11,736 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:32:11,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:32:11,736 INFO L85 PathProgramCache]: Analyzing trace with hash 2091108377, now seen corresponding path program 1 times [2022-01-10 14:32:11,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:32:11,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604740115] [2022-01-10 14:32:11,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:32:11,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:32:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:32:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 14:32:11,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:32:11,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604740115] [2022-01-10 14:32:11,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604740115] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:32:11,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321838051] [2022-01-10 14:32:11,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:32:11,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:32:11,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:32:11,792 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) [2022-01-10 14:32:11,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 14:32:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:32:11,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 14:32:11,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:32:11,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 14:32:11,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:32:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 14:32:11,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321838051] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:32:11,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:32:11,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 11 [2022-01-10 14:32:11,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487297889] [2022-01-10 14:32:11,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:32:11,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 14:32:11,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:32:11,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 14:32:11,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-10 14:32:11,966 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2022-01-10 14:32:12,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:32:12,056 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2022-01-10 14:32:12,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 14:32:12,057 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) Word has length 16 [2022-01-10 14:32:12,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:32:12,058 INFO L225 Difference]: With dead ends: 71 [2022-01-10 14:32:12,058 INFO L226 Difference]: Without dead ends: 51 [2022-01-10 14:32:12,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2022-01-10 14:32:12,059 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 46 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:32:12,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 73 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:32:12,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-10 14:32:12,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-01-10 14:32:12,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:32:12,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2022-01-10 14:32:12,069 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 16 [2022-01-10 14:32:12,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:32:12,069 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2022-01-10 14:32:12,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2022-01-10 14:32:12,070 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2022-01-10 14:32:12,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-10 14:32:12,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:32:12,071 INFO L514 BasicCegarLoop]: trace histogram [16, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:32:12,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 14:32:12,283 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 [2022-01-10 14:32:12,284 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:32:12,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:32:12,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1364587784, now seen corresponding path program 2 times [2022-01-10 14:32:12,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:32:12,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882698361] [2022-01-10 14:32:12,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:32:12,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:32:12,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:32:12,482 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 85 proven. 10 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-01-10 14:32:12,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:32:12,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882698361] [2022-01-10 14:32:12,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882698361] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:32:12,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712902375] [2022-01-10 14:32:12,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 14:32:12,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:32:12,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:32:12,484 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) [2022-01-10 14:32:12,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 14:32:12,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 14:32:12,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 14:32:12,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-10 14:32:12,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:32:12,924 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 14:32:12,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:32:14,407 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 4 proven. 184 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 14:32:14,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712902375] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:32:14,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:32:14,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 15] total 34 [2022-01-10 14:32:14,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286788287] [2022-01-10 14:32:14,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:32:14,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-10 14:32:14,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:32:14,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-10 14:32:14,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 14:32:14,410 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 34 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 34 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:32:26,396 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 14:32:28,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:32:28,674 INFO L93 Difference]: Finished difference Result 312 states and 381 transitions. [2022-01-10 14:32:28,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-10 14:32:28,675 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 34 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2022-01-10 14:32:28,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:32:28,677 INFO L225 Difference]: With dead ends: 312 [2022-01-10 14:32:28,677 INFO L226 Difference]: Without dead ends: 246 [2022-01-10 14:32:28,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5526 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=1992, Invalid=14264, Unknown=0, NotChecked=0, Total=16256 [2022-01-10 14:32:28,684 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 750 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 1704 mSolverCounterSat, 956 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 2661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 956 IncrementalHoareTripleChecker+Valid, 1704 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-01-10 14:32:28,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [750 Valid, 248 Invalid, 2661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [956 Valid, 1704 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-01-10 14:32:28,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-01-10 14:32:28,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 72. [2022-01-10 14:32:28,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 71 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:32:28,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2022-01-10 14:32:28,708 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 43 [2022-01-10 14:32:28,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:32:28,708 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2022-01-10 14:32:28,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 34 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:32:28,708 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2022-01-10 14:32:28,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 14:32:28,710 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:32:28,710 INFO L514 BasicCegarLoop]: trace histogram [25, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:32:28,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 14:32:28,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:32:28,923 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:32:28,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:32:28,924 INFO L85 PathProgramCache]: Analyzing trace with hash 2141987734, now seen corresponding path program 1 times [2022-01-10 14:32:28,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:32:28,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643075] [2022-01-10 14:32:28,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:32:28,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:32:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:32:29,034 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-01-10 14:32:29,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:32:29,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643075] [2022-01-10 14:32:29,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643075] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:32:29,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903913716] [2022-01-10 14:32:29,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:32:29,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:32:29,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:32:29,036 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) [2022-01-10 14:32:29,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 14:32:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:32:29,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 14:32:29,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:32:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-01-10 14:32:29,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:32:29,478 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 164 proven. 2 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-01-10 14:32:29,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903913716] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:32:29,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:32:29,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 10 [2022-01-10 14:32:29,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466124065] [2022-01-10 14:32:29,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:32:29,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 14:32:29,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:32:29,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 14:32:29,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2022-01-10 14:32:29,480 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:32:29,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:32:29,609 INFO L93 Difference]: Finished difference Result 271 states and 337 transitions. [2022-01-10 14:32:29,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 14:32:29,610 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-01-10 14:32:29,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:32:29,611 INFO L225 Difference]: With dead ends: 271 [2022-01-10 14:32:29,611 INFO L226 Difference]: Without dead ends: 267 [2022-01-10 14:32:29,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-01-10 14:32:29,612 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 108 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:32:29,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 64 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:32:29,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-01-10 14:32:29,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2022-01-10 14:32:29,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.244360902255639) internal successors, (331), 266 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:32:29,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 331 transitions. [2022-01-10 14:32:29,694 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 331 transitions. Word has length 61 [2022-01-10 14:32:29,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:32:29,694 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 331 transitions. [2022-01-10 14:32:29,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:32:29,695 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 331 transitions. [2022-01-10 14:32:29,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-01-10 14:32:29,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:32:29,699 INFO L514 BasicCegarLoop]: trace histogram [100, 20, 20, 20, 20, 20, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-01-10 14:32:29,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-10 14:32:29,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:32:29,920 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:32:29,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:32:29,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1902029302, now seen corresponding path program 2 times [2022-01-10 14:32:29,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:32:29,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684707370] [2022-01-10 14:32:29,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:32:29,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:32:30,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:32:30,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8014 backedges. 3037 proven. 405 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2022-01-10 14:32:30,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:32:30,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684707370] [2022-01-10 14:32:30,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684707370] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:32:30,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239128935] [2022-01-10 14:32:30,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 14:32:30,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:32:30,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:32:30,674 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 14:32:30,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 14:32:30,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 14:32:30,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 14:32:30,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 1467 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 14:32:30,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:32:56,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8014 backedges. 0 proven. 5253 refuted. 1017 times theorem prover too weak. 1744 trivial. 0 not checked. [2022-01-10 14:32:56,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:33:06,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8014 backedges. 125 proven. 6104 refuted. 0 times theorem prover too weak. 1785 trivial. 0 not checked. [2022-01-10 14:33:06,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239128935] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:33:06,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:33:06,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 12] total 29 [2022-01-10 14:33:06,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551393789] [2022-01-10 14:33:06,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:33:06,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-10 14:33:06,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:33:06,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-10 14:33:06,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=600, Unknown=8, NotChecked=0, Total=812 [2022-01-10 14:33:06,233 INFO L87 Difference]: Start difference. First operand 267 states and 331 transitions. Second operand has 29 states, 29 states have (on average 5.413793103448276) internal successors, (157), 29 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)