/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf -i ../../../trunk/examples/svcomp/list-simple/dll2c_remove_all_reverse.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 05:25:37,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 05:25:37,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 05:25:37,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 05:25:37,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 05:25:37,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 05:25:37,325 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 05:25:37,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 05:25:37,327 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 05:25:37,327 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 05:25:37,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 05:25:37,328 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 05:25:37,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 05:25:37,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 05:25:37,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 05:25:37,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 05:25:37,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 05:25:37,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 05:25:37,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 05:25:37,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 05:25:37,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 05:25:37,342 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 05:25:37,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 05:25:37,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 05:25:37,345 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 05:25:37,345 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 05:25:37,345 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 05:25:37,346 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 05:25:37,346 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 05:25:37,346 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 05:25:37,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 05:25:37,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 05:25:37,347 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 05:25:37,348 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 05:25:37,348 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 05:25:37,349 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 05:25:37,349 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 05:25:37,349 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 05:25:37,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 05:25:37,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 05:25:37,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 05:25:37,351 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 05:25:37,373 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 05:25:37,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 05:25:37,374 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 05:25:37,374 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 05:25:37,375 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 05:25:37,375 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 05:25:37,375 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 05:25:37,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 05:25:37,375 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 05:25:37,375 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 05:25:37,375 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 05:25:37,376 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 05:25:37,376 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 05:25:37,376 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 05:25:37,376 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 05:25:37,376 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 05:25:37,376 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 05:25:37,376 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 05:25:37,376 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 05:25:37,377 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 05:25:37,377 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 05:25:37,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 05:25:37,377 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 05:25:37,377 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 05:25:37,377 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 05:25:37,377 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 05:25:37,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 05:25:37,377 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 05:25:37,378 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 05:25:37,378 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 05:25:37,378 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 05:25:37,378 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 05:25:37,379 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 05:25:37,379 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 05:25:37,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 05:25:37,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 05:25:37,599 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 05:25:37,600 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 05:25:37,602 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 05:25:37,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2c_remove_all_reverse.i [2022-01-11 05:25:37,655 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6992084f4/e5bafe7ef48740cfa6e4620029f7c46b/FLAG16bd621f0 [2022-01-11 05:25:38,071 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 05:25:38,071 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/dll2c_remove_all_reverse.i [2022-01-11 05:25:38,084 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6992084f4/e5bafe7ef48740cfa6e4620029f7c46b/FLAG16bd621f0 [2022-01-11 05:25:38,096 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6992084f4/e5bafe7ef48740cfa6e4620029f7c46b [2022-01-11 05:25:38,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 05:25:38,099 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 05:25:38,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 05:25:38,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 05:25:38,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 05:25:38,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 05:25:38" (1/1) ... [2022-01-11 05:25:38,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@726850ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:25:38, skipping insertion in model container [2022-01-11 05:25:38,103 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 05:25:38" (1/1) ... [2022-01-11 05:25:38,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 05:25:38,129 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 05:25:38,323 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-simple/dll2c_remove_all_reverse.i[24177,24190] [2022-01-11 05:25:38,325 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 05:25:38,339 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 05:25:38,374 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-simple/dll2c_remove_all_reverse.i[24177,24190] [2022-01-11 05:25:38,374 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 05:25:38,401 INFO L208 MainTranslator]: Completed translation [2022-01-11 05:25:38,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:25:38 WrapperNode [2022-01-11 05:25:38,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 05:25:38,404 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 05:25:38,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 05:25:38,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 05:25:38,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:25:38" (1/1) ... [2022-01-11 05:25:38,441 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:25:38" (1/1) ... [2022-01-11 05:25:38,461 INFO L137 Inliner]: procedures = 129, calls = 37, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 120 [2022-01-11 05:25:38,461 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 05:25:38,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 05:25:38,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 05:25:38,462 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 05:25:38,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:25:38" (1/1) ... [2022-01-11 05:25:38,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:25:38" (1/1) ... [2022-01-11 05:25:38,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:25:38" (1/1) ... [2022-01-11 05:25:38,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:25:38" (1/1) ... [2022-01-11 05:25:38,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:25:38" (1/1) ... [2022-01-11 05:25:38,490 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:25:38" (1/1) ... [2022-01-11 05:25:38,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:25:38" (1/1) ... [2022-01-11 05:25:38,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 05:25:38,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 05:25:38,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 05:25:38,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 05:25:38,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:25:38" (1/1) ... [2022-01-11 05:25:38,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 05:25:38,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:25:38,520 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-11 05:25:38,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-11 05:25:38,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-11 05:25:38,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 05:25:38,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-11 05:25:38,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-11 05:25:38,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-11 05:25:38,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-11 05:25:38,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-11 05:25:38,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-01-11 05:25:38,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 05:25:38,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 05:25:38,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 05:25:38,675 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 05:25:38,676 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 05:25:38,995 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 05:25:38,999 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 05:25:38,999 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-11 05:25:39,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:25:39 BoogieIcfgContainer [2022-01-11 05:25:39,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 05:25:39,001 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 05:25:39,001 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 05:25:39,002 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 05:25:39,004 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:25:39" (1/1) ... [2022-01-11 05:25:39,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 05:25:39 BasicIcfg [2022-01-11 05:25:39,066 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 05:25:39,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 05:25:39,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 05:25:39,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 05:25:39,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 05:25:38" (1/4) ... [2022-01-11 05:25:39,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dbac225 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 05:25:39, skipping insertion in model container [2022-01-11 05:25:39,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:25:38" (2/4) ... [2022-01-11 05:25:39,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dbac225 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 05:25:39, skipping insertion in model container [2022-01-11 05:25:39,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:25:39" (3/4) ... [2022-01-11 05:25:39,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dbac225 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 05:25:39, skipping insertion in model container [2022-01-11 05:25:39,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 05:25:39" (4/4) ... [2022-01-11 05:25:39,071 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_remove_all_reverse.iTransformedIcfg [2022-01-11 05:25:39,074 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 05:25:39,074 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 05:25:39,108 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 05:25:39,112 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-11 05:25:39,112 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 05:25:39,121 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:25:39,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-11 05:25:39,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:25:39,125 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:25:39,126 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:25:39,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:25:39,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1677703377, now seen corresponding path program 1 times [2022-01-11 05:25:39,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:25:39,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65128429] [2022-01-11 05:25:39,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:25:39,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:25:39,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:25:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:25:39,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:25:39,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65128429] [2022-01-11 05:25:39,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65128429] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:25:39,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:25:39,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 05:25:39,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92516864] [2022-01-11 05:25:39,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:25:39,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-11 05:25:39,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:25:39,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-11 05:25:39,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 05:25:39,393 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:25:39,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:25:39,405 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-01-11 05:25:39,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-11 05:25:39,407 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-11 05:25:39,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:25:39,413 INFO L225 Difference]: With dead ends: 39 [2022-01-11 05:25:39,413 INFO L226 Difference]: Without dead ends: 21 [2022-01-11 05:25:39,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 05:25:39,428 INFO L933 BasicCegarLoop]: 31 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, 31 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 05:25:39,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 05:25:39,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-11 05:25:39,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-11 05:25:39,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:25:39,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-01-11 05:25:39,455 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 12 [2022-01-11 05:25:39,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:25:39,456 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-01-11 05:25:39,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:25:39,457 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-01-11 05:25:39,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-11 05:25:39,457 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:25:39,458 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:25:39,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 05:25:39,458 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:25:39,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:25:39,460 INFO L85 PathProgramCache]: Analyzing trace with hash -790199696, now seen corresponding path program 1 times [2022-01-11 05:25:39,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:25:39,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947715312] [2022-01-11 05:25:39,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:25:39,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:25:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:25:39,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:25:39,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:25:39,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947715312] [2022-01-11 05:25:39,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947715312] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:25:39,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:25:39,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 05:25:39,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391715085] [2022-01-11 05:25:39,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:25:39,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 05:25:39,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:25:39,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 05:25:39,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 05:25:39,606 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:25:39,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:25:39,637 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2022-01-11 05:25:39,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 05:25:39,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-11 05:25:39,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:25:39,639 INFO L225 Difference]: With dead ends: 32 [2022-01-11 05:25:39,639 INFO L226 Difference]: Without dead ends: 22 [2022-01-11 05:25:39,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 05:25:39,644 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 05:25:39,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 34 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 05:25:39,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-11 05:25:39,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-11 05:25:39,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:25:39,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-01-11 05:25:39,652 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2022-01-11 05:25:39,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:25:39,654 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-01-11 05:25:39,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:25:39,658 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-01-11 05:25:39,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-11 05:25:39,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:25:39,658 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:25:39,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 05:25:39,658 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:25:39,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:25:39,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1713661092, now seen corresponding path program 1 times [2022-01-11 05:25:39,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:25:39,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131484349] [2022-01-11 05:25:39,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:25:39,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:25:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:25:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 05:25:39,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:25:39,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131484349] [2022-01-11 05:25:39,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131484349] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:25:39,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:25:39,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-11 05:25:39,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372900250] [2022-01-11 05:25:39,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:25:39,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 05:25:39,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:25:39,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 05:25:39,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-11 05:25:39,866 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:25:39,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:25:39,899 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-01-11 05:25:39,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-11 05:25:39,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-11 05:25:39,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:25:39,900 INFO L225 Difference]: With dead ends: 30 [2022-01-11 05:25:39,900 INFO L226 Difference]: Without dead ends: 26 [2022-01-11 05:25:39,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-11 05:25:39,904 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 19 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 05:25:39,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 41 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 05:25:39,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-11 05:25:39,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2022-01-11 05:25:39,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:25:39,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-01-11 05:25:39,907 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2022-01-11 05:25:39,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:25:39,908 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-01-11 05:25:39,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:25:39,908 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-01-11 05:25:39,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-11 05:25:39,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:25:39,908 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] [2022-01-11 05:25:39,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-11 05:25:39,909 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:25:39,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:25:39,909 INFO L85 PathProgramCache]: Analyzing trace with hash -555616564, now seen corresponding path program 1 times [2022-01-11 05:25:39,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:25:39,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777509428] [2022-01-11 05:25:39,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:25:39,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:25:39,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:25:40,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 05:25:40,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:25:40,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777509428] [2022-01-11 05:25:40,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777509428] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:25:40,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946118945] [2022-01-11 05:25:40,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:25:40,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:25:40,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:25:40,134 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:25:40,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 05:25:40,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:25:40,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-11 05:25:40,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:25:40,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-11 05:25:40,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-11 05:25:40,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-11 05:25:40,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-11 05:25:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 05:25:40,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-11 05:25:40,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946118945] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:25:40,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-11 05:25:40,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-01-11 05:25:40,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014394747] [2022-01-11 05:25:40,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:25:40,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-11 05:25:40,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:25:40,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-11 05:25:40,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-11 05:25:40,491 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:25:40,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:25:40,588 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-01-11 05:25:40,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-11 05:25:40,589 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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) Word has length 22 [2022-01-11 05:25:40,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:25:40,589 INFO L225 Difference]: With dead ends: 31 [2022-01-11 05:25:40,589 INFO L226 Difference]: Without dead ends: 23 [2022-01-11 05:25:40,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-11 05:25:40,590 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 26 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 05:25:40,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 62 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 05:25:40,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-11 05:25:40,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-11 05:25:40,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) 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) [2022-01-11 05:25:40,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-01-11 05:25:40,593 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 22 [2022-01-11 05:25:40,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:25:40,594 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-01-11 05:25:40,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:25:40,594 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-01-11 05:25:40,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-11 05:25:40,594 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:25:40,594 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] [2022-01-11 05:25:40,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-11 05:25:40,812 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 [2022-01-11 05:25:40,812 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:25:40,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:25:40,812 INFO L85 PathProgramCache]: Analyzing trace with hash 331887117, now seen corresponding path program 1 times [2022-01-11 05:25:40,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:25:40,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470720115] [2022-01-11 05:25:40,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:25:40,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:25:40,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:25:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 05:25:40,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:25:40,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470720115] [2022-01-11 05:25:40,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470720115] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:25:40,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246857395] [2022-01-11 05:25:40,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:25:40,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:25:40,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:25:40,978 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:25:40,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 05:25:41,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:25:41,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-11 05:25:41,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:25:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:25:41,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:25:41,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:25:41,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246857395] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:25:41,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:25:41,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-01-11 05:25:41,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848109444] [2022-01-11 05:25:41,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:25:41,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-11 05:25:41,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:25:41,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-11 05:25:41,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-01-11 05:25:41,563 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:25:41,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:25:41,642 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2022-01-11 05:25:41,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 05:25:41,643 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-11 05:25:41,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:25:41,643 INFO L225 Difference]: With dead ends: 39 [2022-01-11 05:25:41,643 INFO L226 Difference]: Without dead ends: 35 [2022-01-11 05:25:41,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-01-11 05:25:41,644 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 05:25:41,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 100 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 05:25:41,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-11 05:25:41,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2022-01-11 05:25:41,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:25:41,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-01-11 05:25:41,648 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2022-01-11 05:25:41,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:25:41,648 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-01-11 05:25:41,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:25:41,648 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-01-11 05:25:41,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-11 05:25:41,648 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:25:41,649 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:25:41,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-11 05:25:41,849 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 [2022-01-11 05:25:41,849 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:25:41,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:25:41,850 INFO L85 PathProgramCache]: Analyzing trace with hash -2038095114, now seen corresponding path program 2 times [2022-01-11 05:25:41,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:25:41,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740784762] [2022-01-11 05:25:41,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:25:41,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:25:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:25:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:25:43,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:25:43,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740784762] [2022-01-11 05:25:43,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740784762] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:25:43,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598392627] [2022-01-11 05:25:43,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 05:25:43,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:25:43,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:25:43,042 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:25:43,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 05:25:44,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 05:25:44,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:25:44,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 156 conjunts are in the unsatisfiable core [2022-01-11 05:25:44,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:25:44,323 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-01-11 05:25:44,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2022-01-11 05:25:44,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:25:44,492 INFO L353 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-01-11 05:25:44,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 16 [2022-01-11 05:25:44,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-11 05:25:44,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-11 05:25:44,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:25:44,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 70 [2022-01-11 05:25:44,942 INFO L353 Elim1Store]: treesize reduction 32, result has 13.5 percent of original size [2022-01-11 05:25:44,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 178 treesize of output 146 [2022-01-11 05:25:44,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2022-01-11 05:25:44,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:25:44,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 113 [2022-01-11 05:25:44,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2022-01-11 05:25:44,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 88 [2022-01-11 05:25:44,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:25:44,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 44 [2022-01-11 05:25:44,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2022-01-11 05:25:45,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-11 05:25:45,024 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-11 05:25:45,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 174 [2022-01-11 05:25:45,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 122 [2022-01-11 05:25:45,574 INFO L353 Elim1Store]: treesize reduction 608, result has 10.7 percent of original size [2022-01-11 05:25:45,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 12 new quantified variables, introduced 16 case distinctions, treesize of input 1226 treesize of output 454 [2022-01-11 05:25:45,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:25:45,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:25:45,601 INFO L353 Elim1Store]: treesize reduction 57, result has 20.8 percent of original size [2022-01-11 05:25:45,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 5 case distinctions, treesize of input 560 treesize of output 220 [2022-01-11 05:25:45,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:25:45,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:25:45,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:25:45,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:25:45,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:25:45,628 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-11 05:25:45,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 152 treesize of output 80 [2022-01-11 05:25:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:25:51,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:25:55,070 INFO L353 Elim1Store]: treesize reduction 37, result has 47.1 percent of original size [2022-01-11 05:25:55,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29808 treesize of output 19016 [2022-01-11 05:25:55,118 INFO L353 Elim1Store]: treesize reduction 37, result has 47.1 percent of original size [2022-01-11 05:25:55,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 19028 treesize of output 9600 [2022-01-11 05:25:55,175 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-11 05:25:55,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17218 treesize of output 16732 [2022-01-11 05:25:55,911 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-11 05:25:55,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30000 treesize of output 29148