/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 20:46:06,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 20:46:06,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 20:46:06,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 20:46:06,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 20:46:06,084 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 20:46:06,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 20:46:06,085 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 20:46:06,086 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 20:46:06,087 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 20:46:06,087 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 20:46:06,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 20:46:06,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 20:46:06,089 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 20:46:06,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 20:46:06,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 20:46:06,090 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 20:46:06,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 20:46:06,092 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 20:46:06,093 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 20:46:06,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 20:46:06,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 20:46:06,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 20:46:06,095 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 20:46:06,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-23 20:46:06,097 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-23 20:46:06,097 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-23 20:46:06,098 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-23 20:46:06,098 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-23 20:46:06,098 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-23 20:46:06,099 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-23 20:46:06,099 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-23 20:46:06,100 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-23 20:46:06,100 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-23 20:46:06,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-23 20:46:06,101 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-23 20:46:06,101 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-23 20:46:06,101 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-23 20:46:06,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 20:46:06,102 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 20:46:06,102 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 20:46:06,103 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 20:46:06,117 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 20:46:06,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 20:46:06,117 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 20:46:06,118 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 20:46:06,118 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 20:46:06,118 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 20:46:06,118 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 20:46:06,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 20:46:06,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 20:46:06,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 20:46:06,119 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 20:46:06,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 20:46:06,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 20:46:06,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 20:46:06,119 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 20:46:06,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 20:46:06,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 20:46:06,119 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 20:46:06,119 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 20:46:06,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 20:46:06,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 20:46:06,120 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 20:46:06,120 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 20:46:06,120 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 20:46:06,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 20:46:06,120 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 20:46:06,120 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 20:46:06,120 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 20:46:06,121 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 20:46:06,121 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 20:46:06,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 20:46:06,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 20:46:06,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 20:46:06,264 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 20:46:06,265 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 20:46:06,266 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2022-02-23 20:46:06,310 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c13d0bc28/c74a3e6091e64297bfb972dc6d9ccf76/FLAG632eaa2c2 [2022-02-23 20:46:06,670 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 20:46:06,671 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2022-02-23 20:46:06,676 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c13d0bc28/c74a3e6091e64297bfb972dc6d9ccf76/FLAG632eaa2c2 [2022-02-23 20:46:06,689 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c13d0bc28/c74a3e6091e64297bfb972dc6d9ccf76 [2022-02-23 20:46:06,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 20:46:06,692 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 20:46:06,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 20:46:06,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 20:46:06,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 20:46:06,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 08:46:06" (1/1) ... [2022-02-23 20:46:06,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@688b91e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:46:06, skipping insertion in model container [2022-02-23 20:46:06,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 08:46:06" (1/1) ... [2022-02-23 20:46:06,702 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 20:46:06,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 20:46:06,844 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i[893,906] [2022-02-23 20:46:06,855 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 20:46:06,859 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 20:46:06,867 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i[893,906] [2022-02-23 20:46:06,872 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 20:46:06,880 INFO L208 MainTranslator]: Completed translation [2022-02-23 20:46:06,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:46:06 WrapperNode [2022-02-23 20:46:06,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 20:46:06,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 20:46:06,881 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 20:46:06,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 20:46:06,888 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:46:06" (1/1) ... [2022-02-23 20:46:06,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:46:06" (1/1) ... [2022-02-23 20:46:06,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:46:06" (1/1) ... [2022-02-23 20:46:06,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:46:06" (1/1) ... [2022-02-23 20:46:06,895 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:46:06" (1/1) ... [2022-02-23 20:46:06,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:46:06" (1/1) ... [2022-02-23 20:46:06,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:46:06" (1/1) ... [2022-02-23 20:46:06,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 20:46:06,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 20:46:06,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 20:46:06,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 20:46:06,901 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:46:06" (1/1) ... [2022-02-23 20:46:06,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 20:46:06,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:46:06,945 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) [2022-02-23 20:46:06,958 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 [2022-02-23 20:46:06,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 20:46:06,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 20:46:06,972 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 20:46:06,972 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 20:46:06,973 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 20:46:06,973 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 20:46:06,973 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 20:46:06,973 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 20:46:06,974 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-23 20:46:06,974 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-23 20:46:06,974 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 20:46:06,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 20:46:06,974 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 20:46:06,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 20:46:06,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 20:46:06,975 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 20:46:06,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 20:46:06,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 20:46:06,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 20:46:06,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 20:46:06,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 20:46:06,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 20:46:07,036 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 20:46:07,038 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 20:46:07,149 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 20:46:07,152 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 20:46:07,153 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 20:46:07,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:46:07 BoogieIcfgContainer [2022-02-23 20:46:07,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 20:46:07,154 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 20:46:07,154 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 20:46:07,155 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 20:46:07,157 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:46:07" (1/1) ... [2022-02-23 20:46:07,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 08:46:07 BasicIcfg [2022-02-23 20:46:07,170 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 20:46:07,171 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 20:46:07,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 20:46:07,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 20:46:07,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 08:46:06" (1/4) ... [2022-02-23 20:46:07,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa7dca1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 08:46:07, skipping insertion in model container [2022-02-23 20:46:07,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:46:06" (2/4) ... [2022-02-23 20:46:07,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa7dca1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 08:46:07, skipping insertion in model container [2022-02-23 20:46:07,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:46:07" (3/4) ... [2022-02-23 20:46:07,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa7dca1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 08:46:07, skipping insertion in model container [2022-02-23 20:46:07,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 08:46:07" (4/4) ... [2022-02-23 20:46:07,176 INFO L111 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.iqvasr [2022-02-23 20:46:07,179 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 20:46:07,179 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 20:46:07,206 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 20:46:07,211 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=FINITE_AUTOMATA, 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 [2022-02-23 20:46:07,211 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 20:46:07,221 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-23 20:46:07,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-23 20:46:07,225 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:46:07,225 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:46:07,225 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:46:07,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:46:07,229 INFO L85 PathProgramCache]: Analyzing trace with hash -868390563, now seen corresponding path program 1 times [2022-02-23 20:46:07,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:46:07,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831691330] [2022-02-23 20:46:07,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:46:07,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:46:07,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:07,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:46:07,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:07,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:46:07,465 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:46:07,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831691330] [2022-02-23 20:46:07,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831691330] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:46:07,466 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:46:07,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 20:46:07,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042744510] [2022-02-23 20:46:07,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:46:07,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 20:46:07,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:46:07,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 20:46:07,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 20:46:07,499 INFO L87 Difference]: Start difference. First operand has 43 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:46:07,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:46:07,816 INFO L93 Difference]: Finished difference Result 88 states and 155 transitions. [2022-02-23 20:46:07,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 20:46:07,818 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-23 20:46:07,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:46:07,826 INFO L225 Difference]: With dead ends: 88 [2022-02-23 20:46:07,826 INFO L226 Difference]: Without dead ends: 47 [2022-02-23 20:46:07,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-23 20:46:07,832 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 34 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 20:46:07,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 68 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 20:46:07,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-23 20:46:07,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2022-02-23 20:46:07,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 19 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-23 20:46:07,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2022-02-23 20:46:07,884 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 14 [2022-02-23 20:46:07,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:46:07,885 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2022-02-23 20:46:07,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:46:07,885 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2022-02-23 20:46:07,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-23 20:46:07,887 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:46:07,888 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:46:07,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 20:46:07,888 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:46:07,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:46:07,894 INFO L85 PathProgramCache]: Analyzing trace with hash -867437251, now seen corresponding path program 1 times [2022-02-23 20:46:07,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:46:07,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602542871] [2022-02-23 20:46:07,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:46:07,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:46:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:07,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:46:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:07,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:46:07,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:46:07,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602542871] [2022-02-23 20:46:07,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602542871] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:46:07,997 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:46:07,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 20:46:07,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743219547] [2022-02-23 20:46:07,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:46:07,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 20:46:07,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:46:07,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 20:46:07,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 20:46:07,999 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:46:08,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:46:08,164 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2022-02-23 20:46:08,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 20:46:08,165 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-23 20:46:08,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:46:08,167 INFO L225 Difference]: With dead ends: 55 [2022-02-23 20:46:08,167 INFO L226 Difference]: Without dead ends: 53 [2022-02-23 20:46:08,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-23 20:46:08,168 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 20:46:08,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 52 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 20:46:08,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-23 20:46:08,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2022-02-23 20:46:08,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-23 20:46:08,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2022-02-23 20:46:08,195 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 14 [2022-02-23 20:46:08,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:46:08,195 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2022-02-23 20:46:08,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:46:08,195 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2022-02-23 20:46:08,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-23 20:46:08,196 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:46:08,196 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:46:08,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 20:46:08,196 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:46:08,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:46:08,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1607544442, now seen corresponding path program 1 times [2022-02-23 20:46:08,197 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:46:08,197 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866796239] [2022-02-23 20:46:08,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:46:08,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:46:08,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:08,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:46:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:08,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-23 20:46:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:46:08,256 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:46:08,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866796239] [2022-02-23 20:46:08,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866796239] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:46:08,256 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:46:08,256 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 20:46:08,256 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579434260] [2022-02-23 20:46:08,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:46:08,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 20:46:08,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:46:08,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 20:46:08,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 20:46:08,257 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 20:46:08,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:46:08,397 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-02-23 20:46:08,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 20:46:08,397 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-02-23 20:46:08,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:46:08,399 INFO L225 Difference]: With dead ends: 57 [2022-02-23 20:46:08,399 INFO L226 Difference]: Without dead ends: 55 [2022-02-23 20:46:08,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-23 20:46:08,402 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 20:46:08,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 50 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 20:46:08,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-23 20:46:08,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-02-23 20:46:08,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-23 20:46:08,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2022-02-23 20:46:08,408 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 19 [2022-02-23 20:46:08,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:46:08,408 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2022-02-23 20:46:08,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 20:46:08,409 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2022-02-23 20:46:08,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-23 20:46:08,409 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:46:08,409 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:46:08,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-23 20:46:08,409 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:46:08,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:46:08,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1153064602, now seen corresponding path program 1 times [2022-02-23 20:46:08,410 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:46:08,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877020058] [2022-02-23 20:46:08,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:46:08,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:46:08,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:08,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:46:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:08,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-23 20:46:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:08,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-23 20:46:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:08,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 20:46:08,488 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:46:08,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877020058] [2022-02-23 20:46:08,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877020058] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:46:08,488 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:46:08,488 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-23 20:46:08,488 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824865599] [2022-02-23 20:46:08,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:46:08,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 20:46:08,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:46:08,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 20:46:08,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-23 20:46:08,489 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 20:46:08,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:46:08,661 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-02-23 20:46:08,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 20:46:08,662 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-02-23 20:46:08,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:46:08,663 INFO L225 Difference]: With dead ends: 61 [2022-02-23 20:46:08,664 INFO L226 Difference]: Without dead ends: 59 [2022-02-23 20:46:08,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-23 20:46:08,671 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 20:46:08,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 59 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 20:46:08,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-23 20:46:08,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-02-23 20:46:08,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-23 20:46:08,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2022-02-23 20:46:08,686 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 24 [2022-02-23 20:46:08,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:46:08,687 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2022-02-23 20:46:08,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 20:46:08,687 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2022-02-23 20:46:08,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 20:46:08,688 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:46:08,688 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:46:08,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-23 20:46:08,688 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:46:08,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:46:08,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1359459551, now seen corresponding path program 1 times [2022-02-23 20:46:08,689 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:46:08,689 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743603380] [2022-02-23 20:46:08,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:46:08,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:46:08,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:08,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:46:08,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:08,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-23 20:46:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:08,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-23 20:46:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:08,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-23 20:46:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 20:46:08,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:46:08,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743603380] [2022-02-23 20:46:08,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743603380] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:46:08,783 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:46:08,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 20:46:08,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31858172] [2022-02-23 20:46:08,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:46:08,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 20:46:08,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:46:08,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 20:46:08,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 20:46:08,784 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 20:46:08,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:46:08,919 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2022-02-23 20:46:08,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 20:46:08,920 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-02-23 20:46:08,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:46:08,920 INFO L225 Difference]: With dead ends: 66 [2022-02-23 20:46:08,920 INFO L226 Difference]: Without dead ends: 64 [2022-02-23 20:46:08,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-23 20:46:08,921 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 20:46:08,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 53 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 20:46:08,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-02-23 20:46:08,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-02-23 20:46:08,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-23 20:46:08,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-02-23 20:46:08,930 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 29 [2022-02-23 20:46:08,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:46:08,930 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-02-23 20:46:08,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 20:46:08,930 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-02-23 20:46:08,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-23 20:46:08,931 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:46:08,931 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:46:08,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-23 20:46:08,931 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:46:08,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:46:08,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1056918318, now seen corresponding path program 1 times [2022-02-23 20:46:08,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:46:08,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922519863] [2022-02-23 20:46:08,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:46:08,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:46:08,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:08,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:46:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-23 20:46:09,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-23 20:46:09,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-23 20:46:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-23 20:46:09,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-23 20:46:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-23 20:46:09,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,020 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-23 20:46:09,020 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:46:09,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922519863] [2022-02-23 20:46:09,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922519863] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:46:09,020 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:46:09,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-23 20:46:09,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083248197] [2022-02-23 20:46:09,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:46:09,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 20:46:09,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:46:09,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 20:46:09,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-23 20:46:09,021 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 20:46:09,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:46:09,185 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2022-02-23 20:46:09,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 20:46:09,185 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-02-23 20:46:09,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:46:09,189 INFO L225 Difference]: With dead ends: 75 [2022-02-23 20:46:09,189 INFO L226 Difference]: Without dead ends: 73 [2022-02-23 20:46:09,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-02-23 20:46:09,190 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 34 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 20:46:09,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 57 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 20:46:09,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-02-23 20:46:09,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2022-02-23 20:46:09,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-23 20:46:09,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2022-02-23 20:46:09,208 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 47 [2022-02-23 20:46:09,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:46:09,210 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2022-02-23 20:46:09,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 20:46:09,210 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2022-02-23 20:46:09,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-23 20:46:09,214 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:46:09,214 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 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] [2022-02-23 20:46:09,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-23 20:46:09,214 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:46:09,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:46:09,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1366093938, now seen corresponding path program 1 times [2022-02-23 20:46:09,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:46:09,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655811799] [2022-02-23 20:46:09,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:46:09,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:46:09,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:46:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-23 20:46:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-23 20:46:09,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-23 20:46:09,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-23 20:46:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-23 20:46:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-23 20:46:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-23 20:46:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-23 20:46:09,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-23 20:46:09,295 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:46:09,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655811799] [2022-02-23 20:46:09,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655811799] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:46:09,295 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:46:09,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-23 20:46:09,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365515612] [2022-02-23 20:46:09,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:46:09,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 20:46:09,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:46:09,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 20:46:09,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-23 20:46:09,297 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-23 20:46:09,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:46:09,484 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2022-02-23 20:46:09,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 20:46:09,484 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 57 [2022-02-23 20:46:09,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:46:09,485 INFO L225 Difference]: With dead ends: 75 [2022-02-23 20:46:09,485 INFO L226 Difference]: Without dead ends: 73 [2022-02-23 20:46:09,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-02-23 20:46:09,486 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 20:46:09,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 64 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 20:46:09,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-02-23 20:46:09,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-02-23 20:46:09,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 42 states have internal predecessors, (45), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-23 20:46:09,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2022-02-23 20:46:09,494 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 57 [2022-02-23 20:46:09,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:46:09,494 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2022-02-23 20:46:09,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-23 20:46:09,495 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2022-02-23 20:46:09,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-23 20:46:09,495 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:46:09,495 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:46:09,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-23 20:46:09,496 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:46:09,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:46:09,496 INFO L85 PathProgramCache]: Analyzing trace with hash -430516171, now seen corresponding path program 1 times [2022-02-23 20:46:09,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:46:09,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55102030] [2022-02-23 20:46:09,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:46:09,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:46:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:46:09,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-23 20:46:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-23 20:46:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-23 20:46:09,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-23 20:46:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-23 20:46:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-23 20:46:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-23 20:46:09,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-23 20:46:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-23 20:46:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-02-23 20:46:09,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:46:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-23 20:46:09,593 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:46:09,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55102030] [2022-02-23 20:46:09,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55102030] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:46:09,593 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:46:09,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-23 20:46:09,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186131923] [2022-02-23 20:46:09,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:46:09,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 20:46:09,593 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:46:09,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 20:46:09,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-02-23 20:46:09,594 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-02-23 20:46:09,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:46:09,758 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2022-02-23 20:46:09,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 20:46:09,758 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 68 [2022-02-23 20:46:09,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:46:09,759 INFO L225 Difference]: With dead ends: 73 [2022-02-23 20:46:09,759 INFO L226 Difference]: Without dead ends: 0 [2022-02-23 20:46:09,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-02-23 20:46:09,760 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 36 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 20:46:09,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 56 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 20:46:09,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-23 20:46:09,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-23 20:46:09,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-23 20:46:09,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-23 20:46:09,761 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 68 [2022-02-23 20:46:09,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:46:09,761 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-23 20:46:09,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-02-23 20:46:09,762 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-23 20:46:09,762 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-23 20:46:09,763 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 20:46:09,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-23 20:46:09,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-02-23 20:46:09,976 INFO L854 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-02-23 20:46:09,976 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-02-23 20:46:09,976 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-02-23 20:46:09,976 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-02-23 20:46:09,976 INFO L861 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-02-23 20:46:09,976 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-02-23 20:46:09,976 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-02-23 20:46:09,976 INFO L861 garLoopResultBuilder]: At program point mainENTRY(lines 24 67) the Hoare annotation is: true [2022-02-23 20:46:09,977 INFO L858 garLoopResultBuilder]: For program point L31(line 31) no Hoare annotation was computed. [2022-02-23 20:46:09,977 INFO L858 garLoopResultBuilder]: For program point mainFINAL(lines 24 67) no Hoare annotation was computed. [2022-02-23 20:46:09,977 INFO L854 garLoopResultBuilder]: At program point L34-2(lines 34 65) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2022-02-23 20:46:09,977 INFO L858 garLoopResultBuilder]: For program point mainEXIT(lines 24 67) no Hoare annotation was computed. [2022-02-23 20:46:09,977 INFO L858 garLoopResultBuilder]: For program point L34-3(lines 34 65) no Hoare annotation was computed. [2022-02-23 20:46:09,977 INFO L854 garLoopResultBuilder]: At program point L35-2(lines 35 64) the Hoare annotation is: (and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2022-02-23 20:46:09,977 INFO L858 garLoopResultBuilder]: For program point L36(lines 36 63) no Hoare annotation was computed. [2022-02-23 20:46:09,977 INFO L854 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~i~0 2) main_~len~0)) [2022-02-23 20:46:09,977 INFO L854 garLoopResultBuilder]: At program point L56(lines 36 63) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2022-02-23 20:46:09,977 INFO L854 garLoopResultBuilder]: At program point L37-1(line 37) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~i~0 2) main_~len~0)) [2022-02-23 20:46:09,977 INFO L854 garLoopResultBuilder]: At program point L57(line 57) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2022-02-23 20:46:09,977 INFO L858 garLoopResultBuilder]: For program point L38(line 38) no Hoare annotation was computed. [2022-02-23 20:46:09,977 INFO L854 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2022-02-23 20:46:09,977 INFO L858 garLoopResultBuilder]: For program point L39(line 39) no Hoare annotation was computed. [2022-02-23 20:46:09,977 INFO L854 garLoopResultBuilder]: At program point L59(line 59) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2022-02-23 20:46:09,978 INFO L854 garLoopResultBuilder]: At program point L40(line 40) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~i~0 2) main_~len~0)) [2022-02-23 20:46:09,978 INFO L858 garLoopResultBuilder]: For program point L60(line 60) no Hoare annotation was computed. [2022-02-23 20:46:09,978 INFO L854 garLoopResultBuilder]: At program point L40-1(line 40) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~i~0 2) main_~len~0)) [2022-02-23 20:46:09,978 INFO L854 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~i~0 2) main_~len~0)) [2022-02-23 20:46:09,978 INFO L854 garLoopResultBuilder]: At program point L42(line 42) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~i~0 2) main_~len~0)) [2022-02-23 20:46:09,978 INFO L858 garLoopResultBuilder]: For program point L43(line 43) no Hoare annotation was computed. [2022-02-23 20:46:09,978 INFO L854 garLoopResultBuilder]: At program point L46-1(line 46) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2022-02-23 20:46:09,978 INFO L854 garLoopResultBuilder]: At program point L47(line 47) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2022-02-23 20:46:09,978 INFO L854 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2022-02-23 20:46:09,978 INFO L858 garLoopResultBuilder]: For program point L49(line 49) no Hoare annotation was computed. [2022-02-23 20:46:09,978 INFO L854 garLoopResultBuilder]: At program point L52-1(line 52) the Hoare annotation is: (and (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2022-02-23 20:46:09,978 INFO L858 garLoopResultBuilder]: For program point L53(line 53) no Hoare annotation was computed. [2022-02-23 20:46:09,978 INFO L854 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2022-02-23 20:46:09,979 INFO L854 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (and (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2022-02-23 20:46:09,979 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-02-23 20:46:09,979 INFO L858 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-02-23 20:46:09,979 INFO L858 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2022-02-23 20:46:09,979 INFO L858 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2022-02-23 20:46:09,979 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2022-02-23 20:46:09,979 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2022-02-23 20:46:09,981 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:46:09,982 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 20:46:09,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 08:46:09 BasicIcfg [2022-02-23 20:46:09,991 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 20:46:09,991 INFO L158 Benchmark]: Toolchain (without parser) took 3299.14ms. Allocated memory was 209.7MB in the beginning and 298.8MB in the end (delta: 89.1MB). Free memory was 154.5MB in the beginning and 132.9MB in the end (delta: 21.7MB). Peak memory consumption was 110.2MB. Max. memory is 8.0GB. [2022-02-23 20:46:09,992 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 209.7MB. Free memory is still 170.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 20:46:09,992 INFO L158 Benchmark]: CACSL2BoogieTranslator took 186.64ms. Allocated memory is still 209.7MB. Free memory was 154.2MB in the beginning and 181.1MB in the end (delta: -26.9MB). Peak memory consumption was 11.1MB. Max. memory is 8.0GB. [2022-02-23 20:46:09,992 INFO L158 Benchmark]: Boogie Preprocessor took 18.73ms. Allocated memory is still 209.7MB. Free memory was 181.1MB in the beginning and 179.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 20:46:09,992 INFO L158 Benchmark]: RCFGBuilder took 253.40ms. Allocated memory is still 209.7MB. Free memory was 179.5MB in the beginning and 167.5MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-02-23 20:46:09,992 INFO L158 Benchmark]: IcfgTransformer took 16.28ms. Allocated memory is still 209.7MB. Free memory was 167.5MB in the beginning and 165.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 20:46:09,993 INFO L158 Benchmark]: TraceAbstraction took 2819.58ms. Allocated memory was 209.7MB in the beginning and 298.8MB in the end (delta: 89.1MB). Free memory was 165.4MB in the beginning and 132.9MB in the end (delta: 32.5MB). Peak memory consumption was 121.1MB. Max. memory is 8.0GB. [2022-02-23 20:46:09,994 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 209.7MB. Free memory is still 170.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 186.64ms. Allocated memory is still 209.7MB. Free memory was 154.2MB in the beginning and 181.1MB in the end (delta: -26.9MB). Peak memory consumption was 11.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.73ms. Allocated memory is still 209.7MB. Free memory was 181.1MB in the beginning and 179.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 253.40ms. Allocated memory is still 209.7MB. Free memory was 179.5MB in the beginning and 167.5MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 16.28ms. Allocated memory is still 209.7MB. Free memory was 167.5MB in the beginning and 165.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 2819.58ms. Allocated memory was 209.7MB in the beginning and 298.8MB in the end (delta: 89.1MB). Free memory was 165.4MB in the beginning and 132.9MB in the end (delta: 32.5MB). Peak memory consumption was 121.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.8s, OverallIterations: 8, TraceHistogramMax: 11, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 268 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 250 mSDsluCounter, 459 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 165 mSDsCounter, 489 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1489 IncrementalHoareTripleChecker+Invalid, 1978 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 489 mSolverCounterUnsat, 294 mSDtfsCounter, 1489 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 169 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=7, InterpolantAutomatonStates: 63, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 23 LocationsWithAnnotation, 55 PreInvPairs, 76 NumberOfFragments, 374 HoareAnnotationTreeSize, 55 FomulaSimplifications, 98 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 23 FomulaSimplificationsInter, 532 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 272 NumberOfCodeBlocks, 272 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 264 ConstructedInterpolants, 0 QuantifiedInterpolants, 592 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 428/428 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (0 <= j && 0 <= i) && limit + 4 <= bufsize - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((i + 1 <= len && 0 <= j) && 5 + j <= bufsize) && 0 <= i) && limit + 4 <= bufsize - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: 0 <= i && limit + 4 <= bufsize RESULT: Ultimate proved your program to be correct! [2022-02-23 20:46:10,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...