/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/array-tiling/nr2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 03:04:50,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 03:04:50,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 03:04:50,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 03:04:50,606 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 03:04:50,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 03:04:50,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 03:04:50,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 03:04:50,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 03:04:50,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 03:04:50,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 03:04:50,645 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 03:04:50,646 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 03:04:50,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 03:04:50,647 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 03:04:50,647 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 03:04:50,648 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 03:04:50,648 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 03:04:50,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 03:04:50,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 03:04:50,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 03:04:50,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 03:04:50,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 03:04:50,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 03:04:50,658 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 03:04:50,658 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 03:04:50,658 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 03:04:50,659 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 03:04:50,659 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 03:04:50,660 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 03:04:50,660 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 03:04:50,660 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 03:04:50,661 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 03:04:50,661 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 03:04:50,662 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 03:04:50,662 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 03:04:50,662 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 03:04:50,663 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 03:04:50,663 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 03:04:50,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 03:04:50,670 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 03:04:50,670 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 03:04:50,692 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 03:04:50,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 03:04:50,693 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 03:04:50,693 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 03:04:50,693 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 03:04:50,694 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 03:04:50,694 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 03:04:50,694 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 03:04:50,694 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 03:04:50,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 03:04:50,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 03:04:50,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 03:04:50,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 03:04:50,694 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 03:04:50,694 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 03:04:50,694 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 03:04:50,695 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 03:04:50,695 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 03:04:50,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 03:04:50,695 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 03:04:50,698 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 03:04:50,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 03:04:50,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 03:04:50,699 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 03:04:50,699 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 03:04:50,699 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 03:04:50,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 03:04:50,699 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 03:04:50,700 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 03:04:50,700 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 03:04:50,700 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 03:04:50,700 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 03:04:50,702 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 03:04:50,702 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 03:04:50,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 03:04:50,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 03:04:50,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 03:04:50,951 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 03:04:50,951 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 03:04:50,952 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/nr2.c [2022-01-11 03:04:51,004 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e9ba83b7/22a7e39857514fa7861d4e78a74547ef/FLAGa1b5495d3 [2022-01-11 03:04:51,330 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 03:04:51,330 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/nr2.c [2022-01-11 03:04:51,339 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e9ba83b7/22a7e39857514fa7861d4e78a74547ef/FLAGa1b5495d3 [2022-01-11 03:04:51,784 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e9ba83b7/22a7e39857514fa7861d4e78a74547ef [2022-01-11 03:04:51,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 03:04:51,789 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 03:04:51,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 03:04:51,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 03:04:51,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 03:04:51,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 03:04:51" (1/1) ... [2022-01-11 03:04:51,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14898e33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:04:51, skipping insertion in model container [2022-01-11 03:04:51,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 03:04:51" (1/1) ... [2022-01-11 03:04:51,806 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 03:04:51,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 03:04:51,999 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-tiling/nr2.c[394,407] [2022-01-11 03:04:52,017 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 03:04:52,022 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 03:04:52,030 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-tiling/nr2.c[394,407] [2022-01-11 03:04:52,035 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 03:04:52,044 INFO L208 MainTranslator]: Completed translation [2022-01-11 03:04:52,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:04:52 WrapperNode [2022-01-11 03:04:52,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 03:04:52,045 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 03:04:52,045 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 03:04:52,045 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 03:04:52,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:04:52" (1/1) ... [2022-01-11 03:04:52,054 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:04:52" (1/1) ... [2022-01-11 03:04:52,065 INFO L137 Inliner]: procedures = 17, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2022-01-11 03:04:52,066 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 03:04:52,066 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 03:04:52,066 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 03:04:52,066 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 03:04:52,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:04:52" (1/1) ... [2022-01-11 03:04:52,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:04:52" (1/1) ... [2022-01-11 03:04:52,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:04:52" (1/1) ... [2022-01-11 03:04:52,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:04:52" (1/1) ... [2022-01-11 03:04:52,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:04:52" (1/1) ... [2022-01-11 03:04:52,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:04:52" (1/1) ... [2022-01-11 03:04:52,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:04:52" (1/1) ... [2022-01-11 03:04:52,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 03:04:52,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 03:04:52,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 03:04:52,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 03:04:52,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:04:52" (1/1) ... [2022-01-11 03:04:52,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 03:04:52,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 03:04:52,113 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 03:04:52,118 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 03:04:52,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 03:04:52,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 03:04:52,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-11 03:04:52,137 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-11 03:04:52,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 03:04:52,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 03:04:52,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-11 03:04:52,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-11 03:04:52,176 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 03:04:52,177 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 03:04:52,306 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 03:04:52,310 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 03:04:52,310 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-11 03:04:52,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 03:04:52 BoogieIcfgContainer [2022-01-11 03:04:52,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 03:04:52,316 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 03:04:52,316 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 03:04:52,317 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 03:04:52,319 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 03:04:52" (1/1) ... [2022-01-11 03:04:52,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 03:04:52 BasicIcfg [2022-01-11 03:04:52,403 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 03:04:52,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 03:04:52,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 03:04:52,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 03:04:52,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 03:04:51" (1/4) ... [2022-01-11 03:04:52,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@648b414d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 03:04:52, skipping insertion in model container [2022-01-11 03:04:52,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:04:52" (2/4) ... [2022-01-11 03:04:52,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@648b414d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 03:04:52, skipping insertion in model container [2022-01-11 03:04:52,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 03:04:52" (3/4) ... [2022-01-11 03:04:52,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@648b414d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 03:04:52, skipping insertion in model container [2022-01-11 03:04:52,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 03:04:52" (4/4) ... [2022-01-11 03:04:52,408 INFO L111 eAbstractionObserver]: Analyzing ICFG nr2.cTransformedIcfg [2022-01-11 03:04:52,411 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 03:04:52,411 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 03:04:52,462 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 03:04:52,467 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 03:04:52,467 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 03:04:52,479 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 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 03:04:52,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-11 03:04:52,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:04:52,482 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 03:04:52,483 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:04:52,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:04:52,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1434995193, now seen corresponding path program 1 times [2022-01-11 03:04:52,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:04:52,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3018545] [2022-01-11 03:04:52,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:04:52,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:04:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:04:52,685 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 03:04:52,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:04:52,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3018545] [2022-01-11 03:04:52,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3018545] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 03:04:52,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 03:04:52,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 03:04:52,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491742658] [2022-01-11 03:04:52,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 03:04:52,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-11 03:04:52,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:04:52,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-11 03:04:52,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 03:04:52,709 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 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 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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 03:04:52,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:04:52,718 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2022-01-11 03:04:52,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-11 03:04:52,720 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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 13 [2022-01-11 03:04:52,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:04:52,724 INFO L225 Difference]: With dead ends: 45 [2022-01-11 03:04:52,725 INFO L226 Difference]: Without dead ends: 20 [2022-01-11 03:04:52,727 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 03:04:52,732 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 03:04:52,733 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 03:04:52,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-11 03:04:52,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-11 03:04:52,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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 03:04:52,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-01-11 03:04:52,756 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2022-01-11 03:04:52,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:04:52,757 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-01-11 03:04:52,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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 03:04:52,758 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-01-11 03:04:52,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-11 03:04:52,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:04:52,759 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 03:04:52,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 03:04:52,760 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:04:52,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:04:52,762 INFO L85 PathProgramCache]: Analyzing trace with hash -547491512, now seen corresponding path program 1 times [2022-01-11 03:04:52,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:04:52,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553112203] [2022-01-11 03:04:52,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:04:52,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:04:52,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:04:52,858 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 03:04:52,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:04:52,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553112203] [2022-01-11 03:04:52,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553112203] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 03:04:52,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 03:04:52,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-11 03:04:52,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365564641] [2022-01-11 03:04:52,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 03:04:52,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 03:04:52,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:04:52,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 03:04:52,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-11 03:04:52,861 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 03:04:52,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:04:52,904 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2022-01-11 03:04:52,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 03:04:52,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 13 [2022-01-11 03:04:52,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:04:52,905 INFO L225 Difference]: With dead ends: 29 [2022-01-11 03:04:52,905 INFO L226 Difference]: Without dead ends: 27 [2022-01-11 03:04:52,906 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 03:04:52,907 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 03:04:52,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 62 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 03:04:52,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-11 03:04:52,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-01-11 03:04:52,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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 03:04:52,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-01-11 03:04:52,910 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2022-01-11 03:04:52,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:04:52,910 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-01-11 03:04:52,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 03:04:52,911 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-01-11 03:04:52,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-11 03:04:52,911 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:04:52,911 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 03:04:52,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 03:04:52,911 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:04:52,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:04:52,912 INFO L85 PathProgramCache]: Analyzing trace with hash -547461721, now seen corresponding path program 1 times [2022-01-11 03:04:52,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:04:52,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295273453] [2022-01-11 03:04:52,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:04:52,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:04:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:04:53,199 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 03:04:53,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:04:53,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295273453] [2022-01-11 03:04:53,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295273453] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 03:04:53,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 03:04:53,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 03:04:53,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553539725] [2022-01-11 03:04:53,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 03:04:53,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 03:04:53,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:04:53,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 03:04:53,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-11 03:04:53,202 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 03:04:53,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:04:53,250 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-01-11 03:04:53,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 03:04:53,251 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 13 [2022-01-11 03:04:53,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:04:53,251 INFO L225 Difference]: With dead ends: 38 [2022-01-11 03:04:53,251 INFO L226 Difference]: Without dead ends: 27 [2022-01-11 03:04:53,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-11 03:04:53,252 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 58 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 03:04:53,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 27 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 03:04:53,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-11 03:04:53,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2022-01-11 03:04:53,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:04:53,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-01-11 03:04:53,256 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2022-01-11 03:04:53,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:04:53,257 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-01-11 03:04:53,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 03:04:53,257 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-01-11 03:04:53,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-11 03:04:53,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:04:53,257 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 03:04:53,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-11 03:04:53,258 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:04:53,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:04:53,258 INFO L85 PathProgramCache]: Analyzing trace with hash 835744619, now seen corresponding path program 1 times [2022-01-11 03:04:53,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:04:53,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171841436] [2022-01-11 03:04:53,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:04:53,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:04:53,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:04:53,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:04:53,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:04:53,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171841436] [2022-01-11 03:04:53,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171841436] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 03:04:53,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 03:04:53,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 03:04:53,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155160558] [2022-01-11 03:04:53,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 03:04:53,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 03:04:53,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:04:53,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 03:04:53,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 03:04:53,306 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:04:53,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:04:53,325 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-01-11 03:04:53,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 03:04:53,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-11 03:04:53,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:04:53,326 INFO L225 Difference]: With dead ends: 42 [2022-01-11 03:04:53,326 INFO L226 Difference]: Without dead ends: 26 [2022-01-11 03:04:53,326 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 03:04:53,327 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 03:04:53,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 36 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 03:04:53,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-11 03:04:53,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-01-11 03:04:53,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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 03:04:53,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-01-11 03:04:53,331 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2022-01-11 03:04:53,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:04:53,331 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-01-11 03:04:53,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:04:53,331 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-01-11 03:04:53,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-11 03:04:53,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:04:53,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 03:04:53,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-11 03:04:53,332 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:04:53,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:04:53,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1895491321, now seen corresponding path program 1 times [2022-01-11 03:04:53,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:04:53,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171754700] [2022-01-11 03:04:53,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:04:53,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:04:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:04:53,399 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 03:04:53,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:04:53,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171754700] [2022-01-11 03:04:53,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171754700] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 03:04:53,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551359249] [2022-01-11 03:04:53,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:04:53,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 03:04:53,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 03:04:53,401 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 03:04:53,402 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 03:04:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:04:53,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-11 03:04:53,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 03:04:53,680 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 13 treesize of output 9 [2022-01-11 03:04:53,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 03:04:53,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-11 03:04:53,771 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 97 treesize of output 32 [2022-01-11 03:04:53,782 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 03:04:53,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 03:04:53,917 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 141 treesize of output 137 [2022-01-11 03:04:53,921 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 188 treesize of output 152 [2022-01-11 03:04:55,551 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 03:04:55,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551359249] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 03:04:55,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 03:04:55,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 8] total 15 [2022-01-11 03:04:55,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557523076] [2022-01-11 03:04:55,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 03:04:55,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-11 03:04:55,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:04:55,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-11 03:04:55,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-01-11 03:04:55,554 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 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 03:04:55,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:04:55,760 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-01-11 03:04:55,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-11 03:04:55,760 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 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 19 [2022-01-11 03:04:55,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:04:55,762 INFO L225 Difference]: With dead ends: 52 [2022-01-11 03:04:55,762 INFO L226 Difference]: Without dead ends: 35 [2022-01-11 03:04:55,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-01-11 03:04:55,763 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 20 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 03:04:55,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 100 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 79 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-01-11 03:04:55,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-11 03:04:55,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2022-01-11 03:04:55,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 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 03:04:55,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-01-11 03:04:55,768 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 19 [2022-01-11 03:04:55,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:04:55,768 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-01-11 03:04:55,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 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 03:04:55,768 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-01-11 03:04:55,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-11 03:04:55,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:04:55,768 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 03:04:55,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-11 03:04:55,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 03:04:55,973 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:04:55,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:04:55,973 INFO L85 PathProgramCache]: Analyzing trace with hash 504897707, now seen corresponding path program 2 times [2022-01-11 03:04:55,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:04:55,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071726465] [2022-01-11 03:04:55,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:04:55,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:04:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:04:56,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:04:56,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:04:56,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071726465] [2022-01-11 03:04:56,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071726465] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 03:04:56,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543759582] [2022-01-11 03:04:56,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 03:04:56,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 03:04:56,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 03:04:56,096 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 03:04:56,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process