/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/recursive/Primes.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 12:30:16,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 12:30:16,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 12:30:16,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 12:30:16,861 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 12:30:16,861 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 12:30:16,862 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 12:30:16,863 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 12:30:16,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 12:30:16,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 12:30:16,866 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 12:30:16,869 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 12:30:16,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 12:30:16,873 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 12:30:16,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 12:30:16,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 12:30:16,876 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 12:30:16,877 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 12:30:16,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 12:30:16,881 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 12:30:16,882 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 12:30:16,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 12:30:16,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 12:30:16,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 12:30:16,897 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 12:30:16,897 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 12:30:16,897 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 12:30:16,898 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 12:30:16,898 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 12:30:16,898 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 12:30:16,899 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 12:30:16,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 12:30:16,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 12:30:16,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 12:30:16,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 12:30:16,900 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 12:30:16,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 12:30:16,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 12:30:16,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 12:30:16,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 12:30:16,902 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 12:30:16,907 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 12:30:16,934 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 12:30:16,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 12:30:16,935 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 12:30:16,935 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 12:30:16,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 12:30:16,936 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 12:30:16,936 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 12:30:16,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 12:30:16,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 12:30:16,936 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 12:30:16,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 12:30:16,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 12:30:16,937 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 12:30:16,937 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 12:30:16,937 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 12:30:16,937 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 12:30:16,937 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 12:30:16,937 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 12:30:16,938 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 12:30:16,938 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 12:30:16,938 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 12:30:16,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:30:16,938 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 12:30:16,938 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 12:30:16,938 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 12:30:16,938 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 12:30:16,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 12:30:16,938 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 12:30:16,938 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 12:30:16,939 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 12:30:16,939 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 12:30:16,939 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 12:30:16,939 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 12:30:16,939 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 12:30:17,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 12:30:17,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 12:30:17,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 12:30:17,152 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 12:30:17,152 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 12:30:17,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Primes.c [2022-01-10 12:30:17,196 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3401e1671/eb9b64174521481cb236e11fb8560159/FLAG0e7ca543e [2022-01-10 12:30:17,583 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 12:30:17,583 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Primes.c [2022-01-10 12:30:17,587 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3401e1671/eb9b64174521481cb236e11fb8560159/FLAG0e7ca543e [2022-01-10 12:30:17,596 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3401e1671/eb9b64174521481cb236e11fb8560159 [2022-01-10 12:30:17,598 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 12:30:17,599 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 12:30:17,602 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 12:30:17,603 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 12:30:17,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 12:30:17,605 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:30:17" (1/1) ... [2022-01-10 12:30:17,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9f6e7c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:17, skipping insertion in model container [2022-01-10 12:30:17,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:30:17" (1/1) ... [2022-01-10 12:30:17,612 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 12:30:17,623 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 12:30:17,753 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/Primes.c[2190,2203] [2022-01-10 12:30:17,755 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:30:17,762 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 12:30:17,776 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/Primes.c[2190,2203] [2022-01-10 12:30:17,777 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:30:17,785 INFO L208 MainTranslator]: Completed translation [2022-01-10 12:30:17,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:17 WrapperNode [2022-01-10 12:30:17,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 12:30:17,786 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 12:30:17,786 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 12:30:17,786 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 12:30:17,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:17" (1/1) ... [2022-01-10 12:30:17,798 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:17" (1/1) ... [2022-01-10 12:30:17,813 INFO L137 Inliner]: procedures = 16, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2022-01-10 12:30:17,813 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 12:30:17,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 12:30:17,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 12:30:17,814 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 12:30:17,819 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:17" (1/1) ... [2022-01-10 12:30:17,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:17" (1/1) ... [2022-01-10 12:30:17,830 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:17" (1/1) ... [2022-01-10 12:30:17,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:17" (1/1) ... [2022-01-10 12:30:17,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:17" (1/1) ... [2022-01-10 12:30:17,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:17" (1/1) ... [2022-01-10 12:30:17,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:17" (1/1) ... [2022-01-10 12:30:17,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 12:30:17,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 12:30:17,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 12:30:17,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 12:30:17,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:17" (1/1) ... [2022-01-10 12:30:17,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:30:17,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:30:17,870 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 12:30:17,875 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 12:30:17,896 INFO L130 BoogieDeclarations]: Found specification of procedure multiple_of [2022-01-10 12:30:17,896 INFO L138 BoogieDeclarations]: Found implementation of procedure multiple_of [2022-01-10 12:30:17,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 12:30:17,897 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2022-01-10 12:30:17,897 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2022-01-10 12:30:17,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 12:30:17,897 INFO L130 BoogieDeclarations]: Found specification of procedure is_prime_ [2022-01-10 12:30:17,897 INFO L138 BoogieDeclarations]: Found implementation of procedure is_prime_ [2022-01-10 12:30:17,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 12:30:17,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 12:30:17,982 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 12:30:17,983 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 12:30:18,140 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 12:30:18,155 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 12:30:18,155 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 12:30:18,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:30:18 BoogieIcfgContainer [2022-01-10 12:30:18,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 12:30:18,157 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 12:30:18,157 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 12:30:18,159 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 12:30:18,161 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:30:18" (1/1) ... [2022-01-10 12:30:18,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:30:18 BasicIcfg [2022-01-10 12:30:18,238 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 12:30:18,239 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 12:30:18,239 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 12:30:18,241 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 12:30:18,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 12:30:17" (1/4) ... [2022-01-10 12:30:18,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f12ae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:30:18, skipping insertion in model container [2022-01-10 12:30:18,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:17" (2/4) ... [2022-01-10 12:30:18,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f12ae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:30:18, skipping insertion in model container [2022-01-10 12:30:18,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:30:18" (3/4) ... [2022-01-10 12:30:18,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f12ae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 12:30:18, skipping insertion in model container [2022-01-10 12:30:18,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:30:18" (4/4) ... [2022-01-10 12:30:18,243 INFO L111 eAbstractionObserver]: Analyzing ICFG Primes.cTransformedIcfg [2022-01-10 12:30:18,246 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 12:30:18,246 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 12:30:18,290 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 12:30:18,298 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 12:30:18,299 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 12:30:18,313 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 38 states have internal predecessors, (55), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-10 12:30:18,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 12:30:18,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:18,318 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:30:18,318 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:18,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:18,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1750057542, now seen corresponding path program 1 times [2022-01-10 12:30:18,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:18,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633040559] [2022-01-10 12:30:18,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:18,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:18,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:18,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:18,533 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 12:30:18,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:18,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633040559] [2022-01-10 12:30:18,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633040559] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:30:18,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:30:18,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 12:30:18,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710454913] [2022-01-10 12:30:18,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:30:18,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 12:30:18,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:30:18,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 12:30:18,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 12:30:18,562 INFO L87 Difference]: Start difference. First operand has 51 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 38 states have internal predecessors, (55), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 12:30:18,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:30:18,610 INFO L93 Difference]: Finished difference Result 57 states and 79 transitions. [2022-01-10 12:30:18,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 12:30:18,612 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-10 12:30:18,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:30:18,623 INFO L225 Difference]: With dead ends: 57 [2022-01-10 12:30:18,623 INFO L226 Difference]: Without dead ends: 48 [2022-01-10 12:30:18,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 12:30:18,628 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:30:18,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:30:18,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-10 12:30:18,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-01-10 12:30:18,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-10 12:30:18,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2022-01-10 12:30:18,660 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 15 [2022-01-10 12:30:18,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:30:18,661 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2022-01-10 12:30:18,661 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 12:30:18,662 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2022-01-10 12:30:18,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 12:30:18,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:18,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:30:18,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 12:30:18,664 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:18,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:18,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1593162608, now seen corresponding path program 1 times [2022-01-10 12:30:18,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:18,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252381311] [2022-01-10 12:30:18,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:18,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:18,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:18,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-10 12:30:18,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:18,781 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 12:30:18,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:18,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252381311] [2022-01-10 12:30:18,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252381311] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:30:18,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:30:18,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 12:30:18,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153836896] [2022-01-10 12:30:18,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:30:18,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 12:30:18,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:30:18,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 12:30:18,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 12:30:18,784 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 12:30:18,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:30:18,853 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2022-01-10 12:30:18,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 12:30:18,854 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-01-10 12:30:18,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:30:18,855 INFO L225 Difference]: With dead ends: 70 [2022-01-10 12:30:18,856 INFO L226 Difference]: Without dead ends: 50 [2022-01-10 12:30:18,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-10 12:30:18,857 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 4 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:30:18,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 361 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:30:18,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-10 12:30:18,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-01-10 12:30:18,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 37 states have internal predecessors, (48), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-01-10 12:30:18,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2022-01-10 12:30:18,864 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 22 [2022-01-10 12:30:18,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:30:18,864 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2022-01-10 12:30:18,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 12:30:18,864 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2022-01-10 12:30:18,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 12:30:18,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:18,866 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:30:18,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 12:30:18,866 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:18,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:18,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1874518992, now seen corresponding path program 1 times [2022-01-10 12:30:18,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:18,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65805567] [2022-01-10 12:30:18,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:18,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:18,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:18,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:18,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 12:30:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:19,004 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 12:30:19,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:19,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65805567] [2022-01-10 12:30:19,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65805567] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:30:19,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:30:19,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-10 12:30:19,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744238455] [2022-01-10 12:30:19,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:30:19,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 12:30:19,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:30:19,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 12:30:19,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-10 12:30:19,006 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 12:30:19,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:30:19,134 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-01-10 12:30:19,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 12:30:19,134 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-01-10 12:30:19,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:30:19,137 INFO L225 Difference]: With dead ends: 58 [2022-01-10 12:30:19,137 INFO L226 Difference]: Without dead ends: 54 [2022-01-10 12:30:19,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-01-10 12:30:19,144 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 33 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:30:19,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 398 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:30:19,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-10 12:30:19,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-01-10 12:30:19,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 39 states have internal predecessors, (49), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-01-10 12:30:19,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 70 transitions. [2022-01-10 12:30:19,159 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 70 transitions. Word has length 23 [2022-01-10 12:30:19,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:30:19,159 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 70 transitions. [2022-01-10 12:30:19,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 12:30:19,160 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 70 transitions. [2022-01-10 12:30:19,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 12:30:19,161 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:19,161 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:30:19,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 12:30:19,161 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:19,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:19,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1375793027, now seen corresponding path program 1 times [2022-01-10 12:30:19,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:19,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273911748] [2022-01-10 12:30:19,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:19,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:19,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:19,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:19,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:19,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 12:30:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:19,281 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 12:30:19,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:19,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273911748] [2022-01-10 12:30:19,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273911748] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:30:19,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:30:19,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-10 12:30:19,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042298138] [2022-01-10 12:30:19,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:30:19,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 12:30:19,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:30:19,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 12:30:19,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-10 12:30:19,285 INFO L87 Difference]: Start difference. First operand 52 states and 70 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 12:30:19,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:30:19,388 INFO L93 Difference]: Finished difference Result 60 states and 79 transitions. [2022-01-10 12:30:19,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 12:30:19,388 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-01-10 12:30:19,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:30:19,392 INFO L225 Difference]: With dead ends: 60 [2022-01-10 12:30:19,392 INFO L226 Difference]: Without dead ends: 56 [2022-01-10 12:30:19,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-01-10 12:30:19,402 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 33 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:30:19,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 398 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:30:19,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-10 12:30:19,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-01-10 12:30:19,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 39 states have internal predecessors, (49), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-01-10 12:30:19,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 70 transitions. [2022-01-10 12:30:19,408 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 70 transitions. Word has length 24 [2022-01-10 12:30:19,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:30:19,409 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 70 transitions. [2022-01-10 12:30:19,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 12:30:19,409 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 70 transitions. [2022-01-10 12:30:19,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-10 12:30:19,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:19,410 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:30:19,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 12:30:19,410 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:19,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:19,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1100345333, now seen corresponding path program 1 times [2022-01-10 12:30:19,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:19,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371761115] [2022-01-10 12:30:19,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:19,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:19,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:19,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 12:30:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:19,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:30:19,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 12:30:19,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:19,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371761115] [2022-01-10 12:30:19,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371761115] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:30:19,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:30:19,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-10 12:30:19,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877667131] [2022-01-10 12:30:19,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:30:19,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 12:30:19,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:30:19,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 12:30:19,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-01-10 12:30:19,601 INFO L87 Difference]: Start difference. First operand 52 states and 70 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 12:30:19,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:30:19,713 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2022-01-10 12:30:19,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 12:30:19,713 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2022-01-10 12:30:19,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:30:19,716 INFO L225 Difference]: With dead ends: 63 [2022-01-10 12:30:19,716 INFO L226 Difference]: Without dead ends: 59 [2022-01-10 12:30:19,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-10 12:30:19,717 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 33 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:30:19,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 446 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:30:19,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-10 12:30:19,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2022-01-10 12:30:19,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 41 states have internal predecessors, (51), 9 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (14), 10 states have call predecessors, (14), 9 states have call successors, (14) [2022-01-10 12:30:19,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 74 transitions. [2022-01-10 12:30:19,729 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 74 transitions. Word has length 29 [2022-01-10 12:30:19,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:30:19,730 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 74 transitions. [2022-01-10 12:30:19,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 12:30:19,730 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 74 transitions. [2022-01-10 12:30:19,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-10 12:30:19,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:19,731 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:30:19,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 12:30:19,731 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:19,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:19,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1229117628, now seen corresponding path program 1 times [2022-01-10 12:30:19,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:19,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188919451] [2022-01-10 12:30:19,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:19,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:19,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:19,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 12:30:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:19,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:30:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:19,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 12:30:19,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:19,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188919451] [2022-01-10 12:30:19,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188919451] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:30:19,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:30:19,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-10 12:30:19,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555652448] [2022-01-10 12:30:19,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:30:19,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 12:30:19,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:30:19,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 12:30:19,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-01-10 12:30:19,838 INFO L87 Difference]: Start difference. First operand 55 states and 74 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 12:30:19,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:30:19,924 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2022-01-10 12:30:19,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 12:30:19,924 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2022-01-10 12:30:19,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:30:19,925 INFO L225 Difference]: With dead ends: 64 [2022-01-10 12:30:19,926 INFO L226 Difference]: Without dead ends: 60 [2022-01-10 12:30:19,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-10 12:30:19,928 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 31 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:30:19,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 452 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:30:19,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-10 12:30:19,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2022-01-10 12:30:19,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 39 states have internal predecessors, (50), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2022-01-10 12:30:19,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 71 transitions. [2022-01-10 12:30:19,937 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 71 transitions. Word has length 30 [2022-01-10 12:30:19,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:30:19,938 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 71 transitions. [2022-01-10 12:30:19,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 12:30:19,939 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 71 transitions. [2022-01-10 12:30:19,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 12:30:19,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:19,943 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:30:19,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 12:30:19,943 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:19,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:19,943 INFO L85 PathProgramCache]: Analyzing trace with hash -949843709, now seen corresponding path program 1 times [2022-01-10 12:30:19,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:19,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695935832] [2022-01-10 12:30:19,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:19,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:20,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:20,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 12:30:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:20,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:30:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 12:30:20,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:20,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695935832] [2022-01-10 12:30:20,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695935832] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:30:20,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800298089] [2022-01-10 12:30:20,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:20,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:30:20,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:30:20,116 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 12:30:20,117 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 12:30:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:20,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 12:30:20,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:30:20,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 12:30:20,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:30:20,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 12:30:20,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800298089] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:30:20,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:30:20,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8] total 21 [2022-01-10 12:30:20,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030743150] [2022-01-10 12:30:20,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:30:20,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 12:30:20,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:30:20,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 12:30:20,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-01-10 12:30:20,895 INFO L87 Difference]: Start difference. First operand 53 states and 71 transitions. Second operand has 21 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 21 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 7 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-10 12:30:21,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:30:21,086 INFO L93 Difference]: Finished difference Result 73 states and 97 transitions. [2022-01-10 12:30:21,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 12:30:21,087 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 21 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 7 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 31 [2022-01-10 12:30:21,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:30:21,087 INFO L225 Difference]: With dead ends: 73 [2022-01-10 12:30:21,087 INFO L226 Difference]: Without dead ends: 50 [2022-01-10 12:30:21,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2022-01-10 12:30:21,089 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 52 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:30:21,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 299 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:30:21,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-10 12:30:21,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-01-10 12:30:21,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 38 states have internal predecessors, (46), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-10 12:30:21,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-01-10 12:30:21,092 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 31 [2022-01-10 12:30:21,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:30:21,092 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-01-10 12:30:21,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 21 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 7 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-10 12:30:21,093 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-01-10 12:30:21,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-10 12:30:21,093 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:21,093 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:30:21,118 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 12:30:21,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:30:21,300 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:21,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:21,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1332974186, now seen corresponding path program 1 times [2022-01-10 12:30:21,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:21,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815075282] [2022-01-10 12:30:21,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:21,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:21,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:21,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 12:30:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:21,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:30:21,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:21,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 12:30:21,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:21,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815075282] [2022-01-10 12:30:21,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815075282] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:30:21,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248703205] [2022-01-10 12:30:21,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:21,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:30:21,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:30:21,509 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 12:30:21,510 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 12:30:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:21,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-10 12:30:21,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:30:22,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 12:30:22,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:30:23,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 12:30:23,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248703205] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:30:23,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:30:23,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 28 [2022-01-10 12:30:23,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496640782] [2022-01-10 12:30:23,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:30:23,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-10 12:30:23,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:30:23,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-10 12:30:23,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-01-10 12:30:23,382 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 28 states, 26 states have (on average 2.0) internal successors, (52), 23 states have internal predecessors, (52), 7 states have call successors, (7), 1 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-10 12:30:23,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:30:23,858 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2022-01-10 12:30:23,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 12:30:23,858 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.0) internal successors, (52), 23 states have internal predecessors, (52), 7 states have call successors, (7), 1 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 32 [2022-01-10 12:30:23,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:30:23,859 INFO L225 Difference]: With dead ends: 70 [2022-01-10 12:30:23,859 INFO L226 Difference]: Without dead ends: 66 [2022-01-10 12:30:23,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=182, Invalid=1078, Unknown=0, NotChecked=0, Total=1260 [2022-01-10 12:30:23,860 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 60 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 12:30:23,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 677 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 286 Invalid, 0 Unknown, 21 Unchecked, 0.2s Time] [2022-01-10 12:30:23,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-10 12:30:23,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2022-01-10 12:30:23,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 47 states have internal predecessors, (55), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (15), 11 states have call predecessors, (15), 9 states have call successors, (15) [2022-01-10 12:30:23,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2022-01-10 12:30:23,865 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 32 [2022-01-10 12:30:23,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:30:23,865 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2022-01-10 12:30:23,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.0) internal successors, (52), 23 states have internal predecessors, (52), 7 states have call successors, (7), 1 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-10 12:30:23,865 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2022-01-10 12:30:23,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-10 12:30:23,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:23,866 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:30:23,881 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 12:30:24,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-01-10 12:30:24,070 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:24,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:24,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1986732847, now seen corresponding path program 1 times [2022-01-10 12:30:24,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:24,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625184981] [2022-01-10 12:30:24,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:24,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:24,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:24,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:24,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-10 12:30:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:24,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:30:24,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:24,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 12:30:24,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:24,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625184981] [2022-01-10 12:30:24,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625184981] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:30:24,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:30:24,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 12:30:24,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37989054] [2022-01-10 12:30:24,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:30:24,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 12:30:24,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:30:24,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 12:30:24,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 12:30:24,181 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 12:30:24,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:30:24,226 INFO L93 Difference]: Finished difference Result 92 states and 113 transitions. [2022-01-10 12:30:24,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 12:30:24,226 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-01-10 12:30:24,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:30:24,227 INFO L225 Difference]: With dead ends: 92 [2022-01-10 12:30:24,227 INFO L226 Difference]: Without dead ends: 66 [2022-01-10 12:30:24,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 12:30:24,228 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 27 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:30:24,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 228 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:30:24,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-10 12:30:24,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2022-01-10 12:30:24,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 45 states have (on average 1.2) internal successors, (54), 47 states have internal predecessors, (54), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (15), 11 states have call predecessors, (15), 9 states have call successors, (15) [2022-01-10 12:30:24,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2022-01-10 12:30:24,236 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 33 [2022-01-10 12:30:24,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:30:24,236 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2022-01-10 12:30:24,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 12:30:24,236 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2022-01-10 12:30:24,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 12:30:24,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:24,237 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:30:24,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 12:30:24,237 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:24,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:24,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1717403632, now seen corresponding path program 1 times [2022-01-10 12:30:24,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:24,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711612015] [2022-01-10 12:30:24,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:24,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:24,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:24,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:24,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-10 12:30:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:24,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:30:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:24,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 12:30:24,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:24,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711612015] [2022-01-10 12:30:24,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711612015] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:30:24,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:30:24,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 12:30:24,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711336190] [2022-01-10 12:30:24,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:30:24,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 12:30:24,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:30:24,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 12:30:24,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 12:30:24,379 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 12:30:24,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:30:24,563 INFO L93 Difference]: Finished difference Result 91 states and 111 transitions. [2022-01-10 12:30:24,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 12:30:24,564 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 34 [2022-01-10 12:30:24,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:30:24,565 INFO L225 Difference]: With dead ends: 91 [2022-01-10 12:30:24,565 INFO L226 Difference]: Without dead ends: 68 [2022-01-10 12:30:24,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-10 12:30:24,565 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 26 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:30:24,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 259 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:30:24,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-10 12:30:24,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2022-01-10 12:30:24,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 45 states have (on average 1.2) internal successors, (54), 47 states have internal predecessors, (54), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (15), 11 states have call predecessors, (15), 9 states have call successors, (15) [2022-01-10 12:30:24,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2022-01-10 12:30:24,571 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 34 [2022-01-10 12:30:24,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:30:24,571 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2022-01-10 12:30:24,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 12:30:24,571 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2022-01-10 12:30:24,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 12:30:24,571 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:24,571 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:30:24,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 12:30:24,572 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:24,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:24,572 INFO L85 PathProgramCache]: Analyzing trace with hash -192590371, now seen corresponding path program 2 times [2022-01-10 12:30:24,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:24,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824994224] [2022-01-10 12:30:24,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:24,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:24,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:24,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 12:30:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:24,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:30:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:24,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:30:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:24,798 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 12:30:24,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:24,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824994224] [2022-01-10 12:30:24,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824994224] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:30:24,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680209368] [2022-01-10 12:30:24,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 12:30:24,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:30:24,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:30:24,800 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 12:30:24,801 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 12:30:24,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 12:30:24,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:30:24,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-10 12:30:24,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:30:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 12:30:25,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:30:25,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680209368] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:30:25,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 12:30:25,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 20 [2022-01-10 12:30:25,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231513488] [2022-01-10 12:30:25,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 12:30:25,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 12:30:25,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:30:25,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 12:30:25,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2022-01-10 12:30:25,495 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 15 states have internal predecessors, (38), 5 states have call successors, (5), 1 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-10 12:30:25,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:30:25,815 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2022-01-10 12:30:25,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 12:30:25,816 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 15 states have internal predecessors, (38), 5 states have call successors, (5), 1 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 40 [2022-01-10 12:30:25,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:30:25,816 INFO L225 Difference]: With dead ends: 70 [2022-01-10 12:30:25,816 INFO L226 Difference]: Without dead ends: 66 [2022-01-10 12:30:25,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-01-10 12:30:25,817 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 25 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:30:25,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 755 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 222 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-01-10 12:30:25,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-10 12:30:25,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-01-10 12:30:25,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 49 states have internal predecessors, (56), 9 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (17), 12 states have call predecessors, (17), 9 states have call successors, (17) [2022-01-10 12:30:25,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2022-01-10 12:30:25,823 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 40 [2022-01-10 12:30:25,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:30:25,823 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2022-01-10 12:30:25,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 15 states have internal predecessors, (38), 5 states have call successors, (5), 1 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-10 12:30:25,824 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2022-01-10 12:30:25,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-10 12:30:25,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:25,824 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:30:25,849 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 12:30:26,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:30:26,035 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:26,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:26,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1563118538, now seen corresponding path program 3 times [2022-01-10 12:30:26,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:26,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779326429] [2022-01-10 12:30:26,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:26,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:26,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:26,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 12:30:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:26,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:30:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:26,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:30:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:26,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:30:26,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-10 12:30:26,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:26,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779326429] [2022-01-10 12:30:26,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779326429] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:30:26,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981414825] [2022-01-10 12:30:26,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 12:30:26,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:30:26,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:30:26,298 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 12:30:26,299 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 12:30:26,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 12:30:26,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:30:26,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-10 12:30:26,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:30:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-10 12:30:32,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:30:41,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981414825] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:30:41,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 12:30:41,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 26 [2022-01-10 12:30:41,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686730428] [2022-01-10 12:30:41,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 12:30:41,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 12:30:41,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:30:41,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 12:30:41,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1074, Unknown=2, NotChecked=0, Total=1190 [2022-01-10 12:30:41,686 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand has 26 states, 25 states have (on average 1.68) internal successors, (42), 19 states have internal predecessors, (42), 4 states have call successors, (4), 1 states have call predecessors, (4), 8 states have return successors, (8), 8 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 12:30:47,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:30:47,753 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2022-01-10 12:30:47,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 12:30:47,754 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.68) internal successors, (42), 19 states have internal predecessors, (42), 4 states have call successors, (4), 1 states have call predecessors, (4), 8 states have return successors, (8), 8 states have call predecessors, (8), 4 states have call successors, (8) Word has length 48 [2022-01-10 12:30:47,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:30:47,755 INFO L225 Difference]: With dead ends: 76 [2022-01-10 12:30:47,755 INFO L226 Difference]: Without dead ends: 72 [2022-01-10 12:30:47,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=200, Invalid=1778, Unknown=2, NotChecked=0, Total=1980 [2022-01-10 12:30:47,756 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 49 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 12:30:47,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 739 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 12:30:47,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-10 12:30:47,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2022-01-10 12:30:47,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 49 states have (on average 1.183673469387755) internal successors, (58), 51 states have internal predecessors, (58), 9 states have call successors, (9), 3 states have call predecessors, (9), 9 states have return successors, (19), 13 states have call predecessors, (19), 9 states have call successors, (19) [2022-01-10 12:30:47,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2022-01-10 12:30:47,760 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 48 [2022-01-10 12:30:47,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:30:47,761 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2022-01-10 12:30:47,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.68) internal successors, (42), 19 states have internal predecessors, (42), 4 states have call successors, (4), 1 states have call predecessors, (4), 8 states have return successors, (8), 8 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 12:30:47,761 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2022-01-10 12:30:47,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-10 12:30:47,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:47,761 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:30:47,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-10 12:30:47,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:30:47,966 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:47,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:47,966 INFO L85 PathProgramCache]: Analyzing trace with hash -205825200, now seen corresponding path program 1 times [2022-01-10 12:30:47,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:47,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374042404] [2022-01-10 12:30:47,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:47,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:47,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:47,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-10 12:30:47,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:47,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-10 12:30:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:48,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-10 12:30:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:48,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:30:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:48,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:30:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:48,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:30:48,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:48,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:30:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:48,030 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-10 12:30:48,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:48,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374042404] [2022-01-10 12:30:48,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374042404] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:30:48,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:30:48,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 12:30:48,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062464998] [2022-01-10 12:30:48,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:30:48,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 12:30:48,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:30:48,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 12:30:48,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 12:30:48,031 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 12:30:48,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:30:48,041 INFO L93 Difference]: Finished difference Result 135 states and 177 transitions. [2022-01-10 12:30:48,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 12:30:48,042 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 72 [2022-01-10 12:30:48,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:30:48,043 INFO L225 Difference]: With dead ends: 135 [2022-01-10 12:30:48,043 INFO L226 Difference]: Without dead ends: 71 [2022-01-10 12:30:48,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 12:30:48,045 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 0 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:30:48,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 168 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:30:48,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-10 12:30:48,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-01-10 12:30:48,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 9 states have call successors, (9), 3 states have call predecessors, (9), 10 states have return successors, (23), 14 states have call predecessors, (23), 9 states have call successors, (23) [2022-01-10 12:30:48,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 92 transitions. [2022-01-10 12:30:48,063 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 92 transitions. Word has length 72 [2022-01-10 12:30:48,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:30:48,063 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 92 transitions. [2022-01-10 12:30:48,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 12:30:48,063 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 92 transitions. [2022-01-10 12:30:48,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-10 12:30:48,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:48,064 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:30:48,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 12:30:48,064 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:48,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:48,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1744831293, now seen corresponding path program 4 times [2022-01-10 12:30:48,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:48,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640758986] [2022-01-10 12:30:48,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:48,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:48,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:48,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:48,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 12:30:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:48,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:30:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:48,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:30:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:48,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:30:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:48,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:30:48,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 12:30:48,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:48,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640758986] [2022-01-10 12:30:48,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640758986] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:30:48,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643727348] [2022-01-10 12:30:48,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 12:30:48,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:30:48,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:30:48,496 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 12:30:48,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 12:30:48,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 12:30:48,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:30:48,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 54 conjunts are in the unsatisfiable core [2022-01-10 12:30:48,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:30:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-10 12:30:56,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:31:14,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643727348] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:31:14,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 12:31:14,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 32 [2022-01-10 12:31:14,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934582053] [2022-01-10 12:31:14,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 12:31:14,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-10 12:31:14,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:31:14,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-10 12:31:14,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1494, Unknown=6, NotChecked=0, Total=1640 [2022-01-10 12:31:14,384 INFO L87 Difference]: Start difference. First operand 71 states and 92 transitions. Second operand has 32 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 22 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 10 states have return successors, (11), 11 states have call predecessors, (11), 5 states have call successors, (11) [2022-01-10 12:31:15,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:31:15,331 INFO L93 Difference]: Finished difference Result 79 states and 101 transitions. [2022-01-10 12:31:15,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 12:31:15,331 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 22 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 10 states have return successors, (11), 11 states have call predecessors, (11), 5 states have call successors, (11) Word has length 56 [2022-01-10 12:31:15,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:31:15,332 INFO L225 Difference]: With dead ends: 79 [2022-01-10 12:31:15,332 INFO L226 Difference]: Without dead ends: 75 [2022-01-10 12:31:15,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=223, Invalid=2423, Unknown=6, NotChecked=0, Total=2652 [2022-01-10 12:31:15,333 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 34 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 12:31:15,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 1021 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 384 Invalid, 0 Unknown, 51 Unchecked, 0.3s Time] [2022-01-10 12:31:15,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-10 12:31:15,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-01-10 12:31:15,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 53 states have (on average 1.169811320754717) internal successors, (62), 55 states have internal predecessors, (62), 9 states have call successors, (9), 3 states have call predecessors, (9), 11 states have return successors, (25), 15 states have call predecessors, (25), 9 states have call successors, (25) [2022-01-10 12:31:15,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 96 transitions. [2022-01-10 12:31:15,338 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 96 transitions. Word has length 56 [2022-01-10 12:31:15,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:31:15,338 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 96 transitions. [2022-01-10 12:31:15,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 22 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 10 states have return successors, (11), 11 states have call predecessors, (11), 5 states have call successors, (11) [2022-01-10 12:31:15,338 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 96 transitions. [2022-01-10 12:31:15,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-10 12:31:15,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:31:15,339 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:31:15,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-10 12:31:15,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-10 12:31:15,556 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:31:15,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:31:15,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1753640052, now seen corresponding path program 1 times [2022-01-10 12:31:15,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:31:15,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141746731] [2022-01-10 12:31:15,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:31:15,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:31:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:15,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:15,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-10 12:31:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:15,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 12:31:15,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:15,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-10 12:31:15,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:15,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:31:15,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:15,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:31:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:15,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:31:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:15,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:31:15,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-01-10 12:31:15,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:31:15,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141746731] [2022-01-10 12:31:15,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141746731] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:31:15,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:31:15,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 12:31:15,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809714524] [2022-01-10 12:31:15,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:31:15,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 12:31:15,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:31:15,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 12:31:15,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 12:31:15,652 INFO L87 Difference]: Start difference. First operand 74 states and 96 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 12:31:15,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:31:15,682 INFO L93 Difference]: Finished difference Result 111 states and 139 transitions. [2022-01-10 12:31:15,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 12:31:15,682 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2022-01-10 12:31:15,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:31:15,684 INFO L225 Difference]: With dead ends: 111 [2022-01-10 12:31:15,684 INFO L226 Difference]: Without dead ends: 73 [2022-01-10 12:31:15,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-10 12:31:15,686 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 4 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:31:15,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 400 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:31:15,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-10 12:31:15,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-01-10 12:31:15,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 55 states have internal predecessors, (59), 9 states have call successors, (9), 3 states have call predecessors, (9), 11 states have return successors, (24), 14 states have call predecessors, (24), 9 states have call successors, (24) [2022-01-10 12:31:15,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2022-01-10 12:31:15,692 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 73 [2022-01-10 12:31:15,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:31:15,693 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2022-01-10 12:31:15,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 12:31:15,693 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2022-01-10 12:31:15,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 12:31:15,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:31:15,694 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:31:15,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-10 12:31:15,694 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:31:15,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:31:15,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1170898218, now seen corresponding path program 5 times [2022-01-10 12:31:15,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:31:15,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713087778] [2022-01-10 12:31:15,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:31:15,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:31:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:15,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:15,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 12:31:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:15,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:31:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:15,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:31:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:16,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:31:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:16,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:31:16,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:16,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:31:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-01-10 12:31:16,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:31:16,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713087778] [2022-01-10 12:31:16,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713087778] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:31:16,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043107231] [2022-01-10 12:31:16,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 12:31:16,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:31:16,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:31:16,163 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 12:31:16,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 12:31:16,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-10 12:31:16,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:31:16,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 59 conjunts are in the unsatisfiable core [2022-01-10 12:31:16,522 INFO L286 TraceCheckSpWp]: Computing forward predicates...