/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy2_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 09:25:45,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 09:25:45,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 09:25:45,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 09:25:45,810 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 09:25:45,812 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 09:25:45,814 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 09:25:45,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 09:25:45,822 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 09:25:45,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 09:25:45,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 09:25:45,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 09:25:45,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 09:25:45,828 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 09:25:45,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 09:25:45,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 09:25:45,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 09:25:45,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 09:25:45,832 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 09:25:45,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 09:25:45,834 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 09:25:45,837 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 09:25:45,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 09:25:45,843 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 09:25:45,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 09:25:45,850 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 09:25:45,851 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 09:25:45,851 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 09:25:45,851 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 09:25:45,852 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 09:25:45,852 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 09:25:45,853 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 09:25:45,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 09:25:45,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 09:25:45,855 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 09:25:45,855 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 09:25:45,855 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 09:25:45,856 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 09:25:45,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 09:25:45,856 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 09:25:45,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 09:25:45,863 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf [2022-01-10 09:25:45,890 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 09:25:45,890 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 09:25:45,890 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 09:25:45,890 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 09:25:45,898 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 09:25:45,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 09:25:45,898 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 09:25:45,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 09:25:45,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 09:25:45,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 09:25:45,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 09:25:45,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 09:25:45,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 09:25:45,899 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 09:25:45,900 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 09:25:45,900 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 09:25:45,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 09:25:45,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 09:25:45,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 09:25:45,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 09:25:45,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 09:25:45,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 09:25:45,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 09:25:45,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 09:25:45,902 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 09:25:45,902 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 09:25:45,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 09:25:45,903 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 09:25:45,903 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 09:25:45,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 09:25:45,903 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 09:25:45,903 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 09:25:45,905 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 09:25:45,905 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_BITWISE WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 09:25:46,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 09:25:46,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 09:25:46,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 09:25:46,099 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 09:25:46,101 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 09:25:46,101 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy2_ground-2.i [2022-01-10 09:25:46,167 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55ee99966/ae244dea85db42389a6477fdb307f7e5/FLAG70ea8fee8 [2022-01-10 09:25:46,561 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 09:25:46,561 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy2_ground-2.i [2022-01-10 09:25:46,571 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55ee99966/ae244dea85db42389a6477fdb307f7e5/FLAG70ea8fee8 [2022-01-10 09:25:46,586 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55ee99966/ae244dea85db42389a6477fdb307f7e5 [2022-01-10 09:25:46,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 09:25:46,592 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 09:25:46,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 09:25:46,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 09:25:46,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 09:25:46,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:25:46" (1/1) ... [2022-01-10 09:25:46,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@796d4171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:25:46, skipping insertion in model container [2022-01-10 09:25:46,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:25:46" (1/1) ... [2022-01-10 09:25:46,604 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 09:25:46,616 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 09:25:46,776 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy2_ground-2.i[816,829] [2022-01-10 09:25:46,788 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 09:25:46,794 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 09:25:46,803 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy2_ground-2.i[816,829] [2022-01-10 09:25:46,809 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 09:25:46,820 INFO L208 MainTranslator]: Completed translation [2022-01-10 09:25:46,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:25:46 WrapperNode [2022-01-10 09:25:46,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 09:25:46,822 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 09:25:46,822 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 09:25:46,822 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 09:25:46,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:25:46" (1/1) ... [2022-01-10 09:25:46,834 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:25:46" (1/1) ... [2022-01-10 09:25:46,849 INFO L137 Inliner]: procedures = 18, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 79 [2022-01-10 09:25:46,849 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 09:25:46,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 09:25:46,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 09:25:46,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 09:25:46,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:25:46" (1/1) ... [2022-01-10 09:25:46,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:25:46" (1/1) ... [2022-01-10 09:25:46,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:25:46" (1/1) ... [2022-01-10 09:25:46,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:25:46" (1/1) ... [2022-01-10 09:25:46,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:25:46" (1/1) ... [2022-01-10 09:25:46,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:25:46" (1/1) ... [2022-01-10 09:25:46,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:25:46" (1/1) ... [2022-01-10 09:25:46,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 09:25:46,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 09:25:46,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 09:25:46,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 09:25:46,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:25:46" (1/1) ... [2022-01-10 09:25:46,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 09:25:46,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:25:46,904 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 09:25:46,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 09:25:46,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 09:25:46,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 09:25:46,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 09:25:46,930 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 09:25:46,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 09:25:46,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 09:25:46,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 09:25:46,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 09:25:46,990 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 09:25:46,991 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 09:25:47,118 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 09:25:47,123 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 09:25:47,123 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-10 09:25:47,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:25:47 BoogieIcfgContainer [2022-01-10 09:25:47,125 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 09:25:47,125 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 09:25:47,125 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 09:25:47,126 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 09:25:47,128 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:25:47" (1/1) ... [2022-01-10 09:25:47,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:25:47 BasicIcfg [2022-01-10 09:25:47,279 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 09:25:47,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 09:25:47,281 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 09:25:47,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 09:25:47,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 09:25:46" (1/4) ... [2022-01-10 09:25:47,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@580698b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:25:47, skipping insertion in model container [2022-01-10 09:25:47,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:25:46" (2/4) ... [2022-01-10 09:25:47,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@580698b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:25:47, skipping insertion in model container [2022-01-10 09:25:47,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:25:47" (3/4) ... [2022-01-10 09:25:47,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@580698b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 09:25:47, skipping insertion in model container [2022-01-10 09:25:47,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:25:47" (4/4) ... [2022-01-10 09:25:47,287 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-2.iTransformedIcfg [2022-01-10 09:25:47,291 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 09:25:47,291 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 09:25:47,322 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 09:25:47,328 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 09:25:47,328 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 09:25:47,339 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 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) [2022-01-10 09:25:47,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 09:25:47,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:25:47,344 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:25:47,344 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:25:47,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:25:47,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1004515852, now seen corresponding path program 1 times [2022-01-10 09:25:47,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:25:47,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836212442] [2022-01-10 09:25:47,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:25:47,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:25:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:25:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 09:25:47,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:25:47,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836212442] [2022-01-10 09:25:47,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836212442] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 09:25:47,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 09:25:47,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 09:25:47,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537175782] [2022-01-10 09:25:47,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 09:25:47,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 09:25:47,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:25:47,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 09:25:47,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 09:25:47,554 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:25:47,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:25:47,568 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2022-01-10 09:25:47,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 09:25:47,570 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-10 09:25:47,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:25:47,576 INFO L225 Difference]: With dead ends: 38 [2022-01-10 09:25:47,576 INFO L226 Difference]: Without dead ends: 17 [2022-01-10 09:25:47,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 09:25:47,583 INFO L933 BasicCegarLoop]: 24 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, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 09:25:47,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 09:25:47,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-10 09:25:47,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-10 09:25:47,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:25:47,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-01-10 09:25:47,615 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2022-01-10 09:25:47,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:25:47,616 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-01-10 09:25:47,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:25:47,618 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-01-10 09:25:47,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 09:25:47,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:25:47,619 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:25:47,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 09:25:47,620 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:25:47,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:25:47,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1483920502, now seen corresponding path program 1 times [2022-01-10 09:25:47,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:25:47,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932066692] [2022-01-10 09:25:47,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:25:47,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:25:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:25:47,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 09:25:47,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:25:47,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932066692] [2022-01-10 09:25:47,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932066692] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 09:25:47,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 09:25:47,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 09:25:47,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961431902] [2022-01-10 09:25:47,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 09:25:47,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 09:25:47,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:25:47,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 09:25:47,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 09:25:47,809 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:25:47,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:25:47,827 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2022-01-10 09:25:47,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 09:25:47,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-10 09:25:47,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:25:47,830 INFO L225 Difference]: With dead ends: 32 [2022-01-10 09:25:47,830 INFO L226 Difference]: Without dead ends: 19 [2022-01-10 09:25:47,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 09:25:47,831 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 09:25:47,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 09:25:47,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-10 09:25:47,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-01-10 09:25:47,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:25:47,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-01-10 09:25:47,836 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2022-01-10 09:25:47,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:25:47,836 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-01-10 09:25:47,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:25:47,837 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-01-10 09:25:47,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-10 09:25:47,837 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:25:47,837 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:25:47,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 09:25:47,838 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:25:47,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:25:47,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1843202636, now seen corresponding path program 1 times [2022-01-10 09:25:47,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:25:47,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568853526] [2022-01-10 09:25:47,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:25:47,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:25:47,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:25:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 09:25:47,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:25:47,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568853526] [2022-01-10 09:25:47,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568853526] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 09:25:47,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 09:25:47,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 09:25:47,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053778384] [2022-01-10 09:25:47,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 09:25:47,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 09:25:47,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:25:47,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 09:25:47,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 09:25:47,948 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2022-01-10 09:25:47,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:25:47,993 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2022-01-10 09:25:47,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 09:25:47,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 [2022-01-10 09:25:47,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:25:47,994 INFO L225 Difference]: With dead ends: 32 [2022-01-10 09:25:47,994 INFO L226 Difference]: Without dead ends: 22 [2022-01-10 09:25:47,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 09:25:47,996 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 09:25:47,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 27 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 09:25:47,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-10 09:25:48,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2022-01-10 09:25:48,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:25:48,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-01-10 09:25:48,001 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2022-01-10 09:25:48,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:25:48,001 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-01-10 09:25:48,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2022-01-10 09:25:48,002 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-01-10 09:25:48,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 09:25:48,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:25:48,002 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:25:48,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 09:25:48,003 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:25:48,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:25:48,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1031693360, now seen corresponding path program 1 times [2022-01-10 09:25:48,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:25:48,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660051459] [2022-01-10 09:25:48,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:25:48,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:25:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:25:48,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 09:25:48,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:25:48,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660051459] [2022-01-10 09:25:48,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660051459] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 09:25:48,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403069135] [2022-01-10 09:25:48,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:25:48,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:25:48,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:25:48,128 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 09:25:48,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 09:25:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:25:48,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 09:25:48,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 09:25:48,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 09:25:48,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 09:25:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 09:25:48,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403069135] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 09:25:48,612 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 09:25:48,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-10 09:25:48,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463512695] [2022-01-10 09:25:48,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 09:25:48,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 09:25:48,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:25:48,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 09:25:48,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 09:25:48,618 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:25:48,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:25:48,681 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-01-10 09:25:48,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 09:25:48,681 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-10 09:25:48,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:25:48,682 INFO L225 Difference]: With dead ends: 41 [2022-01-10 09:25:48,682 INFO L226 Difference]: Without dead ends: 26 [2022-01-10 09:25:48,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-10 09:25:48,684 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 09:25:48,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 50 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 09:25:48,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-10 09:25:48,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-10 09:25:48,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 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) [2022-01-10 09:25:48,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-01-10 09:25:48,689 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2022-01-10 09:25:48,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:25:48,689 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-01-10 09:25:48,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:25:48,690 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-01-10 09:25:48,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 09:25:48,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:25:48,691 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:25:48,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 09:25:48,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:25:48,895 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:25:48,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:25:48,896 INFO L85 PathProgramCache]: Analyzing trace with hash 575112586, now seen corresponding path program 2 times [2022-01-10 09:25:48,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:25:48,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878386406] [2022-01-10 09:25:48,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:25:48,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:25:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:25:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-10 09:25:49,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:25:49,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878386406] [2022-01-10 09:25:49,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878386406] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 09:25:49,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686083066] [2022-01-10 09:25:49,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 09:25:49,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:25:49,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:25:49,032 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 09:25:49,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 09:25:49,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 09:25:49,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 09:25:49,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 09:25:49,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 09:25:49,293 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 09:25:49,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 09:25:49,368 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-10 09:25:49,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686083066] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 09:25:49,369 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 09:25:49,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 9 [2022-01-10 09:25:49,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388730098] [2022-01-10 09:25:49,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 09:25:49,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 09:25:49,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:25:49,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 09:25:49,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-10 09:25:49,371 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:25:49,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:25:49,546 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2022-01-10 09:25:49,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 09:25:49,549 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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) Word has length 23 [2022-01-10 09:25:49,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:25:49,549 INFO L225 Difference]: With dead ends: 49 [2022-01-10 09:25:49,549 INFO L226 Difference]: Without dead ends: 38 [2022-01-10 09:25:49,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-10 09:25:49,551 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 09:25:49,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 65 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 09:25:49,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-10 09:25:49,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-01-10 09:25:49,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:25:49,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-01-10 09:25:49,557 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 23 [2022-01-10 09:25:49,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:25:49,557 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-01-10 09:25:49,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:25:49,557 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-01-10 09:25:49,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 09:25:49,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:25:49,558 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:25:49,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 09:25:49,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:25:49,759 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:25:49,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:25:49,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1967772450, now seen corresponding path program 3 times [2022-01-10 09:25:49,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:25:49,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107486408] [2022-01-10 09:25:49,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:25:49,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:25:49,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:25:49,923 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-10 09:25:49,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:25:49,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107486408] [2022-01-10 09:25:49,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107486408] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 09:25:49,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690915520] [2022-01-10 09:25:49,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 09:25:49,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:25:49,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:25:49,925 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 09:25:49,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 09:25:52,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-10 09:25:52,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 09:25:52,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-10 09:25:52,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 09:26:04,678 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 09:26:04,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 09:26:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-10 09:26:08,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690915520] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 09:26:08,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 09:26:08,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 8] total 21 [2022-01-10 09:26:08,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418128644] [2022-01-10 09:26:08,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 09:26:08,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 09:26:08,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:26:08,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 09:26:08,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=337, Unknown=6, NotChecked=0, Total=420 [2022-01-10 09:26:08,095 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:26:15,468 WARN L228 SmtUtils]: Spent 5.67s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-10 09:26:22,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:26:22,294 INFO L93 Difference]: Finished difference Result 91 states and 109 transitions. [2022-01-10 09:26:22,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 09:26:22,294 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 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 35 [2022-01-10 09:26:22,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:26:22,295 INFO L225 Difference]: With dead ends: 91 [2022-01-10 09:26:22,295 INFO L226 Difference]: Without dead ends: 64 [2022-01-10 09:26:22,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=141, Invalid=503, Unknown=6, NotChecked=0, Total=650 [2022-01-10 09:26:22,296 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 81 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-10 09:26:22,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 107 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 296 Invalid, 0 Unknown, 4 Unchecked, 2.8s Time] [2022-01-10 09:26:22,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-10 09:26:22,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-01-10 09:26:22,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:26:22,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2022-01-10 09:26:22,308 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 35 [2022-01-10 09:26:22,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:26:22,308 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2022-01-10 09:26:22,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 09:26:22,309 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2022-01-10 09:26:22,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 09:26:22,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:26:22,310 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:26:22,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 09:26:22,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:26:22,517 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:26:22,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:26:22,518 INFO L85 PathProgramCache]: Analyzing trace with hash 133895876, now seen corresponding path program 4 times [2022-01-10 09:26:22,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:26:22,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637070958] [2022-01-10 09:26:22,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:26:22,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:26:22,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:26:22,863 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-01-10 09:26:22,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:26:22,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637070958] [2022-01-10 09:26:22,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637070958] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 09:26:22,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016645057] [2022-01-10 09:26:22,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 09:26:22,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:26:22,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:26:22,868 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 09:26:22,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 09:26:23,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 09:26:23,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 09:26:23,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-10 09:26:23,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 09:26:42,278 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-01-10 09:26:42,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 09:26:51,427 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 55 proven. 50 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-01-10 09:26:51,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016645057] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 09:26:51,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 09:26:51,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 14] total 25 [2022-01-10 09:26:51,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215758585] [2022-01-10 09:26:51,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 09:26:51,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-10 09:26:51,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:26:51,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-10 09:26:51,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=477, Unknown=11, NotChecked=0, Total=600 [2022-01-10 09:26:51,429 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)