/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 09:26:40,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 09:26:40,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 09:26:40,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 09:26:40,280 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 09:26:40,282 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 09:26:40,283 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 09:26:40,285 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 09:26:40,285 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 09:26:40,286 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 09:26:40,289 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 09:26:40,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 09:26:40,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 09:26:40,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 09:26:40,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 09:26:40,295 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 09:26:40,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 09:26:40,300 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 09:26:40,300 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 09:26:40,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 09:26:40,301 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 09:26:40,302 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 09:26:40,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 09:26:40,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 09:26:40,302 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 09:26:40,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 09:26:40,303 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 09:26:40,304 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 09:26:40,304 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 09:26:40,304 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 09:26:40,304 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 09:26:40,305 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 09:26:40,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 09:26:40,306 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf [2022-01-10 09:26:40,325 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 09:26:40,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 09:26:40,325 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 09:26:40,325 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 09:26:40,326 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 09:26:40,326 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 09:26:40,326 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 09:26:40,327 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 09:26:40,327 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 09:26:40,327 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 09:26:40,327 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 09:26:40,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 09:26:40,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 09:26:40,327 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 09:26:40,327 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 09:26:40,327 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 09:26:40,328 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 09:26:40,328 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 09:26:40,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 09:26:40,328 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 09:26:40,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 09:26:40,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 09:26:40,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 09:26:40,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 09:26:40,329 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 09:26:40,329 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 09:26:40,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 09:26:40,329 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 09:26:40,329 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 09:26:40,329 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 09:26:40,329 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 09:26:40,329 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 09:26:40,330 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 09:26:40,330 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_BITWISE WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 09:26:40,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 09:26:40,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 09:26:40,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 09:26:40,563 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 09:26:40,564 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 09:26:40,565 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i [2022-01-10 09:26:40,614 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc75fc664/59db99cb1319426ea6757acbc2fe5398/FLAG904c227c9 [2022-01-10 09:26:40,959 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 09:26:40,959 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i [2022-01-10 09:26:40,963 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc75fc664/59db99cb1319426ea6757acbc2fe5398/FLAG904c227c9 [2022-01-10 09:26:40,973 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc75fc664/59db99cb1319426ea6757acbc2fe5398 [2022-01-10 09:26:40,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 09:26:40,977 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 09:26:40,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 09:26:40,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 09:26:40,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 09:26:40,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:26:40" (1/1) ... [2022-01-10 09:26:40,983 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53d50982 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:40, skipping insertion in model container [2022-01-10 09:26:40,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:26:40" (1/1) ... [2022-01-10 09:26:40,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 09:26:40,997 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 09:26:41,142 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i[816,829] [2022-01-10 09:26:41,174 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 09:26:41,182 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 09:26:41,193 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i[816,829] [2022-01-10 09:26:41,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 09:26:41,227 INFO L208 MainTranslator]: Completed translation [2022-01-10 09:26:41,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:41 WrapperNode [2022-01-10 09:26:41,228 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 09:26:41,229 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 09:26:41,229 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 09:26:41,229 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 09:26:41,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:41" (1/1) ... [2022-01-10 09:26:41,248 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:41" (1/1) ... [2022-01-10 09:26:41,270 INFO L137 Inliner]: procedures = 18, calls = 53, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 175 [2022-01-10 09:26:41,270 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 09:26:41,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 09:26:41,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 09:26:41,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 09:26:41,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:41" (1/1) ... [2022-01-10 09:26:41,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:41" (1/1) ... [2022-01-10 09:26:41,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:41" (1/1) ... [2022-01-10 09:26:41,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:41" (1/1) ... [2022-01-10 09:26:41,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:41" (1/1) ... [2022-01-10 09:26:41,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:41" (1/1) ... [2022-01-10 09:26:41,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:41" (1/1) ... [2022-01-10 09:26:41,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 09:26:41,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 09:26:41,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 09:26:41,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 09:26:41,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:41" (1/1) ... [2022-01-10 09:26:41,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 09:26:41,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:26:41,338 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 09:26:41,357 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 09:26:41,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 09:26:41,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 09:26:41,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 09:26:41,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 09:26:41,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 09:26:41,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 09:26:41,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 09:26:41,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 09:26:41,437 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 09:26:41,438 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 09:26:41,679 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 09:26:41,683 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 09:26:41,683 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-01-10 09:26:41,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:26:41 BoogieIcfgContainer [2022-01-10 09:26:41,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 09:26:41,684 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 09:26:41,684 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 09:26:41,686 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 09:26:41,688 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:26:41" (1/1) ... [2022-01-10 09:26:41,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:26:41 BasicIcfg [2022-01-10 09:26:41,832 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 09:26:41,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 09:26:41,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 09:26:41,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 09:26:41,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 09:26:40" (1/4) ... [2022-01-10 09:26:41,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c1ebf41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:26:41, skipping insertion in model container [2022-01-10 09:26:41,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:41" (2/4) ... [2022-01-10 09:26:41,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c1ebf41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:26:41, skipping insertion in model container [2022-01-10 09:26:41,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:26:41" (3/4) ... [2022-01-10 09:26:41,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c1ebf41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 09:26:41, skipping insertion in model container [2022-01-10 09:26:41,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:26:41" (4/4) ... [2022-01-10 09:26:41,837 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy8_ground-1.iTransformedIcfg [2022-01-10 09:26:41,841 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 09:26:41,841 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 09:26:41,868 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 09:26:41,873 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 09:26:41,873 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 09:26:41,882 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 38 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:26:41,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 09:26:41,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:26:41,886 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:26:41,886 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:26:41,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:26:41,891 INFO L85 PathProgramCache]: Analyzing trace with hash 4751923, now seen corresponding path program 1 times [2022-01-10 09:26:41,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:26:41,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950305336] [2022-01-10 09:26:41,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:26:41,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:26:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:26:42,050 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 09:26:42,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:26:42,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950305336] [2022-01-10 09:26:42,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950305336] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 09:26:42,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 09:26:42,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 09:26:42,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050819092] [2022-01-10 09:26:42,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 09:26:42,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 09:26:42,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:26:42,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 09:26:42,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 09:26:42,072 INFO L87 Difference]: Start difference. First operand has 39 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 38 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 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 09:26:42,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:26:42,083 INFO L93 Difference]: Finished difference Result 74 states and 112 transitions. [2022-01-10 09:26:42,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 09:26:42,085 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-10 09:26:42,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:26:42,089 INFO L225 Difference]: With dead ends: 74 [2022-01-10 09:26:42,090 INFO L226 Difference]: Without dead ends: 35 [2022-01-10 09:26:42,092 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 09:26:42,094 INFO L933 BasicCegarLoop]: 48 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, 48 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 09:26:42,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 09:26:42,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-10 09:26:42,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-10 09:26:42,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 0 states have call successors, (0), 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 09:26:42,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-01-10 09:26:42,114 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 23 [2022-01-10 09:26:42,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:26:42,115 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-01-10 09:26:42,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 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 09:26:42,117 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-01-10 09:26:42,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 09:26:42,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:26:42,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:26:42,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 09:26:42,119 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:26:42,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:26:42,121 INFO L85 PathProgramCache]: Analyzing trace with hash -776889156, now seen corresponding path program 1 times [2022-01-10 09:26:42,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:26:42,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017406073] [2022-01-10 09:26:42,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:26:42,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:26:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:26:42,345 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 09:26:42,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:26:42,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017406073] [2022-01-10 09:26:42,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017406073] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 09:26:42,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 09:26:42,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 09:26:42,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348778542] [2022-01-10 09:26:42,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 09:26:42,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 09:26:42,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:26:42,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 09:26:42,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 09:26:42,350 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 09:26:42,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:26:42,366 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2022-01-10 09:26:42,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 09:26:42,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-10 09:26:42,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:26:42,369 INFO L225 Difference]: With dead ends: 68 [2022-01-10 09:26:42,369 INFO L226 Difference]: Without dead ends: 37 [2022-01-10 09:26:42,373 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 09:26:42,374 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 1 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 09:26:42,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 82 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 09:26:42,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-10 09:26:42,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-01-10 09:26:42,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 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 09:26:42,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-01-10 09:26:42,385 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 23 [2022-01-10 09:26:42,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:26:42,386 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-01-10 09:26:42,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 09:26:42,388 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-01-10 09:26:42,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 09:26:42,393 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:26:42,393 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:26:42,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 09:26:42,393 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:26:42,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:26:42,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1152387462, now seen corresponding path program 1 times [2022-01-10 09:26:42,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:26:42,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886883685] [2022-01-10 09:26:42,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:26:42,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:26:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:26:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 09:26:42,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:26:42,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886883685] [2022-01-10 09:26:42,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886883685] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 09:26:42,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 09:26:42,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 09:26:42,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364567912] [2022-01-10 09:26:42,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 09:26:42,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 09:26:42,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:26:42,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 09:26:42,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 09:26:42,529 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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 09:26:42,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:26:42,641 INFO L93 Difference]: Finished difference Result 80 states and 104 transitions. [2022-01-10 09:26:42,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 09:26:42,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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) Word has length 25 [2022-01-10 09:26:42,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:26:42,644 INFO L225 Difference]: With dead ends: 80 [2022-01-10 09:26:42,644 INFO L226 Difference]: Without dead ends: 52 [2022-01-10 09:26:42,645 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 09:26:42,645 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 09:26:42,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 39 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 09:26:42,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-10 09:26:42,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2022-01-10 09:26:42,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 43 states have internal predecessors, (53), 0 states have call successors, (0), 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 09:26:42,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2022-01-10 09:26:42,650 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 25 [2022-01-10 09:26:42,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:26:42,650 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2022-01-10 09:26:42,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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 09:26:42,651 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2022-01-10 09:26:42,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 09:26:42,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:26:42,653 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:26:42,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 09:26:42,653 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:26:42,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:26:42,655 INFO L85 PathProgramCache]: Analyzing trace with hash 840675306, now seen corresponding path program 1 times [2022-01-10 09:26:42,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:26:42,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229257956] [2022-01-10 09:26:42,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:26:42,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:26:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:26:42,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 09:26:42,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:26:42,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229257956] [2022-01-10 09:26:42,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229257956] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 09:26:42,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590202161] [2022-01-10 09:26:42,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:26:42,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:26:42,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:26:42,944 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 09:26:43,014 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 09:26:43,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:26:43,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 09:26:43,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 09:26:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 09:26:43,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 09:26:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 09:26:43,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590202161] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 09:26:43,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 09:26:43,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-10 09:26:43,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494847187] [2022-01-10 09:26:43,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 09:26:43,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 09:26:43,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:26:43,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 09:26:43,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-10 09:26:43,592 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 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 09:26:44,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:26:44,073 INFO L93 Difference]: Finished difference Result 102 states and 128 transitions. [2022-01-10 09:26:44,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 09:26:44,073 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 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 41 [2022-01-10 09:26:44,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:26:44,075 INFO L225 Difference]: With dead ends: 102 [2022-01-10 09:26:44,075 INFO L226 Difference]: Without dead ends: 63 [2022-01-10 09:26:44,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-10 09:26:44,082 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 25 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 09:26:44,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 116 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 09:26:44,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-10 09:26:44,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-01-10 09:26:44,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 61 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:26:44,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-01-10 09:26:44,093 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 41 [2022-01-10 09:26:44,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:26:44,093 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-01-10 09:26:44,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 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 09:26:44,093 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-01-10 09:26:44,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 09:26:44,094 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:26:44,094 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:26:44,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-10 09:26:44,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:26:44,299 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:26:44,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:26:44,300 INFO L85 PathProgramCache]: Analyzing trace with hash -2043817064, now seen corresponding path program 2 times [2022-01-10 09:26:44,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:26:44,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626976906] [2022-01-10 09:26:44,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:26:44,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:26:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:26:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-10 09:26:44,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:26:44,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626976906] [2022-01-10 09:26:44,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626976906] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 09:26:44,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772420541] [2022-01-10 09:26:44,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 09:26:44,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:26:44,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:26:44,537 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 09:26:44,538 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 09:26:45,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 09:26:45,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 09:26:45,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 09:26:45,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 09:26:45,507 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-10 09:26:45,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 09:26:45,682 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 09:26:45,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772420541] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 09:26:45,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 09:26:45,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 11 [2022-01-10 09:26:45,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105710889] [2022-01-10 09:26:45,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 09:26:45,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 09:26:45,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:26:45,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 09:26:45,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-01-10 09:26:45,683 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 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 09:26:46,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:26:46,001 INFO L93 Difference]: Finished difference Result 125 states and 146 transitions. [2022-01-10 09:26:46,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 09:26:46,002 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 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) Word has length 59 [2022-01-10 09:26:46,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:26:46,002 INFO L225 Difference]: With dead ends: 125 [2022-01-10 09:26:46,002 INFO L226 Difference]: Without dead ends: 70 [2022-01-10 09:26:46,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-01-10 09:26:46,003 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 09:26:46,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 211 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 09:26:46,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-10 09:26:46,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-01-10 09:26:46,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.144927536231884) internal successors, (79), 69 states have internal predecessors, (79), 0 states have call successors, (0), 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 09:26:46,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2022-01-10 09:26:46,010 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 59 [2022-01-10 09:26:46,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:26:46,010 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2022-01-10 09:26:46,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 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 09:26:46,011 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2022-01-10 09:26:46,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 09:26:46,011 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:26:46,011 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:26:46,019 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 09:26:46,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:26:46,217 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:26:46,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:26:46,218 INFO L85 PathProgramCache]: Analyzing trace with hash 458117520, now seen corresponding path program 3 times [2022-01-10 09:26:46,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:26:46,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917286830] [2022-01-10 09:26:46,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:26:46,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:26:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:26:46,403 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-10 09:26:46,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:26:46,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917286830] [2022-01-10 09:26:46,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917286830] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 09:26:46,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92367564] [2022-01-10 09:26:46,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 09:26:46,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:26:46,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:26:46,404 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 09:26:46,405 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 09:26:47,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 09:26:47,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 09:26:47,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-10 09:26:47,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 09:26:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-10 09:26:47,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 09:26:47,669 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-10 09:26:47,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92367564] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 09:26:47,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 09:26:47,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-01-10 09:26:47,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810042758] [2022-01-10 09:26:47,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 09:26:47,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 09:26:47,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:26:47,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 09:26:47,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-01-10 09:26:47,670 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:26:49,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:26:49,364 INFO L93 Difference]: Finished difference Result 178 states and 223 transitions. [2022-01-10 09:26:49,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 09:26:49,365 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-01-10 09:26:49,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:26:49,365 INFO L225 Difference]: With dead ends: 178 [2022-01-10 09:26:49,365 INFO L226 Difference]: Without dead ends: 129 [2022-01-10 09:26:49,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2022-01-10 09:26:49,366 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 100 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 09:26:49,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 61 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 195 Invalid, 0 Unknown, 47 Unchecked, 1.0s Time] [2022-01-10 09:26:49,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-10 09:26:49,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2022-01-10 09:26:49,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.078740157480315) internal successors, (137), 127 states have internal predecessors, (137), 0 states have call successors, (0), 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 09:26:49,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2022-01-10 09:26:49,377 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 67 [2022-01-10 09:26:49,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:26:49,377 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2022-01-10 09:26:49,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:26:49,378 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2022-01-10 09:26:49,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-10 09:26:49,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:26:49,378 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:26:49,401 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 09:26:49,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:26:49,584 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:26:49,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:26:49,585 INFO L85 PathProgramCache]: Analyzing trace with hash 48121270, now seen corresponding path program 4 times [2022-01-10 09:26:49,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:26:49,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648382438] [2022-01-10 09:26:49,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:26:49,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:26:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:26:50,070 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-01-10 09:26:50,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:26:50,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648382438] [2022-01-10 09:26:50,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648382438] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 09:26:50,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410886427] [2022-01-10 09:26:50,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 09:26:50,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:26:50,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:26:50,096 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 09:26:50,143 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 09:26:50,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 09:26:50,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 09:26:50,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 1505 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-10 09:26:50,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 09:26:51,023 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2022-01-10 09:26:51,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 09:26:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-01-10 09:26:55,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410886427] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 09:26:55,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 09:26:55,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 15 [2022-01-10 09:26:55,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836004897] [2022-01-10 09:26:55,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 09:26:55,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 09:26:55,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:26:55,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 09:26:55,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=154, Unknown=2, NotChecked=0, Total=210 [2022-01-10 09:26:55,450 INFO L87 Difference]: Start difference. First operand 128 states and 137 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:27:16,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:27:16,622 INFO L93 Difference]: Finished difference Result 259 states and 291 transitions. [2022-01-10 09:27:16,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 09:27:16,623 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2022-01-10 09:27:16,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:27:16,623 INFO L225 Difference]: With dead ends: 259 [2022-01-10 09:27:16,624 INFO L226 Difference]: Without dead ends: 160 [2022-01-10 09:27:16,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 242 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=135, Invalid=322, Unknown=5, NotChecked=0, Total=462 [2022-01-10 09:27:16,625 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 204 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-01-10 09:27:16,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 110 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 367 Invalid, 0 Unknown, 76 Unchecked, 3.2s Time] [2022-01-10 09:27:16,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-01-10 09:27:16,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-01-10 09:27:16,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0628930817610063) internal successors, (169), 159 states have internal predecessors, (169), 0 states have call successors, (0), 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 09:27:16,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 169 transitions. [2022-01-10 09:27:16,670 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 169 transitions. Word has length 125 [2022-01-10 09:27:16,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:27:16,670 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 169 transitions. [2022-01-10 09:27:16,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:27:16,670 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 169 transitions. [2022-01-10 09:27:16,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 09:27:16,671 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:27:16,671 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:27:16,711 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 09:27:16,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:27:16,876 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:27:16,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:27:16,876 INFO L85 PathProgramCache]: Analyzing trace with hash 899946326, now seen corresponding path program 5 times [2022-01-10 09:27:16,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:27:16,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248321259] [2022-01-10 09:27:16,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:27:16,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:27:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:27:17,495 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2022-01-10 09:27:17,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:27:17,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248321259] [2022-01-10 09:27:17,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248321259] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 09:27:17,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178483129] [2022-01-10 09:27:17,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 09:27:17,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:27:17,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:27:17,507 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 09:27:17,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process