/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/loops/vogal-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 19:21:37,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 19:21:37,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 19:21:37,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 19:21:37,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 19:21:37,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 19:21:37,968 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 19:21:37,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 19:21:37,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 19:21:37,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 19:21:37,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 19:21:37,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 19:21:37,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 19:21:37,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 19:21:37,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 19:21:37,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 19:21:37,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 19:21:37,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 19:21:37,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 19:21:37,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 19:21:37,980 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 19:21:37,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 19:21:37,981 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 19:21:37,982 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 19:21:37,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 19:21:37,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-17 19:21:37,984 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-17 19:21:37,984 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-17 19:21:37,985 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-17 19:21:37,985 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-17 19:21:37,986 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-17 19:21:37,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-17 19:21:37,986 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-17 19:21:37,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-17 19:21:37,987 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-17 19:21:37,988 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-17 19:21:37,988 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-17 19:21:37,988 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-17 19:21:37,988 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-17 19:21:37,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 19:21:37,989 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 19:21:37,990 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 19:21:37,990 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 19:21:38,005 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 19:21:38,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 19:21:38,006 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 19:21:38,006 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 19:21:38,006 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 19:21:38,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 19:21:38,007 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 19:21:38,007 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 19:21:38,007 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 19:21:38,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 19:21:38,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 19:21:38,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 19:21:38,008 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 19:21:38,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 19:21:38,008 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 19:21:38,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 19:21:38,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 19:21:38,008 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 19:21:38,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 19:21:38,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 19:21:38,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 19:21:38,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 19:21:38,009 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 19:21:38,009 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 19:21:38,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 19:21:38,010 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 19:21:38,010 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 19:21:38,010 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 19:21:38,010 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 19:21:38,010 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 19:21:38,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 19:21:38,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 19:21:38,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 19:21:38,203 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 19:21:38,203 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 19:21:38,204 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-2.i [2022-03-17 19:21:38,250 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c704d91c5/236ed32a5d76476096b9e133ff3b1d0d/FLAG62280bf94 [2022-03-17 19:21:38,552 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 19:21:38,552 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i [2022-03-17 19:21:38,556 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c704d91c5/236ed32a5d76476096b9e133ff3b1d0d/FLAG62280bf94 [2022-03-17 19:21:38,981 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c704d91c5/236ed32a5d76476096b9e133ff3b1d0d [2022-03-17 19:21:38,983 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 19:21:38,984 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 19:21:38,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 19:21:38,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 19:21:38,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 19:21:38,989 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:21:38" (1/1) ... [2022-03-17 19:21:38,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@799a1b01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:21:38, skipping insertion in model container [2022-03-17 19:21:38,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:21:38" (1/1) ... [2022-03-17 19:21:38,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 19:21:39,006 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 19:21:39,142 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i[808,821] [2022-03-17 19:21:39,167 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 19:21:39,188 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 19:21:39,196 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i[808,821] [2022-03-17 19:21:39,217 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 19:21:39,227 INFO L208 MainTranslator]: Completed translation [2022-03-17 19:21:39,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:21:39 WrapperNode [2022-03-17 19:21:39,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 19:21:39,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 19:21:39,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 19:21:39,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 19:21:39,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:21:39" (1/1) ... [2022-03-17 19:21:39,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:21:39" (1/1) ... [2022-03-17 19:21:39,248 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:21:39" (1/1) ... [2022-03-17 19:21:39,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:21:39" (1/1) ... [2022-03-17 19:21:39,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:21:39" (1/1) ... [2022-03-17 19:21:39,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:21:39" (1/1) ... [2022-03-17 19:21:39,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:21:39" (1/1) ... [2022-03-17 19:21:39,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 19:21:39,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 19:21:39,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 19:21:39,274 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 19:21:39,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:21:39" (1/1) ... [2022-03-17 19:21:39,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 19:21:39,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:39,297 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) [2022-03-17 19:21:39,302 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 [2022-03-17 19:21:39,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 19:21:39,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 19:21:39,323 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 19:21:39,323 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 19:21:39,323 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 19:21:39,323 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 19:21:39,323 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 19:21:39,324 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-17 19:21:39,324 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-17 19:21:39,324 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 19:21:39,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 19:21:39,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 19:21:39,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-03-17 19:21:39,325 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 19:21:39,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-17 19:21:39,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 19:21:39,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 19:21:39,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 19:21:39,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 19:21:39,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 19:21:39,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 19:21:39,406 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 19:21:39,407 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 19:21:39,568 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 19:21:39,574 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 19:21:39,574 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-03-17 19:21:39,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:21:39 BoogieIcfgContainer [2022-03-17 19:21:39,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 19:21:39,576 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 19:21:39,576 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 19:21:39,579 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 19:21:39,581 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:21:39" (1/1) ... [2022-03-17 19:21:39,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 07:21:39 BasicIcfg [2022-03-17 19:21:39,606 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 19:21:39,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 19:21:39,608 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 19:21:39,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 19:21:39,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 07:21:38" (1/4) ... [2022-03-17 19:21:39,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70a58106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:21:39, skipping insertion in model container [2022-03-17 19:21:39,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:21:39" (2/4) ... [2022-03-17 19:21:39,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70a58106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:21:39, skipping insertion in model container [2022-03-17 19:21:39,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:21:39" (3/4) ... [2022-03-17 19:21:39,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70a58106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 07:21:39, skipping insertion in model container [2022-03-17 19:21:39,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 07:21:39" (4/4) ... [2022-03-17 19:21:39,614 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-2.iqvasr [2022-03-17 19:21:39,618 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 19:21:39,618 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 19:21:39,658 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 19:21:39,664 INFO L340 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 [2022-03-17 19:21:39,664 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 19:21:39,683 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 19:21:39,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 19:21:39,687 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:39,687 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:39,688 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:39,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:39,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1974064059, now seen corresponding path program 1 times [2022-03-17 19:21:39,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:39,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853308168] [2022-03-17 19:21:39,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:39,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:39,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:39,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:39,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:21:39,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:39,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853308168] [2022-03-17 19:21:39,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853308168] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:21:39,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 19:21:39,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 19:21:39,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747032346] [2022-03-17 19:21:39,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:21:39,870 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 19:21:39,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:39,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 19:21:39,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 19:21:39,894 INFO L87 Difference]: Start difference. First operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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) [2022-03-17 19:21:39,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:39,926 INFO L93 Difference]: Finished difference Result 64 states and 91 transitions. [2022-03-17 19:21:39,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 19:21:39,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 17 [2022-03-17 19:21:39,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:39,936 INFO L225 Difference]: With dead ends: 64 [2022-03-17 19:21:39,936 INFO L226 Difference]: Without dead ends: 29 [2022-03-17 19:21:39,938 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 19:21:39,940 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:21:39,941 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 45 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:21:39,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-17 19:21:39,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-17 19:21:39,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 3 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) [2022-03-17 19:21:39,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-03-17 19:21:39,967 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2022-03-17 19:21:39,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:39,967 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-03-17 19:21:39,968 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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) [2022-03-17 19:21:39,968 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-03-17 19:21:39,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-17 19:21:39,969 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:39,969 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:39,970 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 19:21:39,970 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:39,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:39,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1576298534, now seen corresponding path program 1 times [2022-03-17 19:21:39,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:39,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594405387] [2022-03-17 19:21:39,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:39,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:40,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:40,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:40,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:21:40,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:40,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594405387] [2022-03-17 19:21:40,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594405387] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:21:40,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 19:21:40,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 19:21:40,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010151200] [2022-03-17 19:21:40,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:21:40,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 19:21:40,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:40,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 19:21:40,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 19:21:40,053 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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) [2022-03-17 19:21:40,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:40,108 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2022-03-17 19:21:40,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 19:21:40,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 19 [2022-03-17 19:21:40,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:40,110 INFO L225 Difference]: With dead ends: 65 [2022-03-17 19:21:40,111 INFO L226 Difference]: Without dead ends: 44 [2022-03-17 19:21:40,111 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 19:21:40,112 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:21:40,112 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 34 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:21:40,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-17 19:21:40,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2022-03-17 19:21:40,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 3 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) [2022-03-17 19:21:40,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-03-17 19:21:40,117 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2022-03-17 19:21:40,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:40,117 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-03-17 19:21:40,117 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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) [2022-03-17 19:21:40,117 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-03-17 19:21:40,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-17 19:21:40,118 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:40,118 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:40,118 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 19:21:40,118 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:40,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:40,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1150961380, now seen corresponding path program 1 times [2022-03-17 19:21:40,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:40,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928143026] [2022-03-17 19:21:40,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:40,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:40,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:40,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:21:40,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:40,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928143026] [2022-03-17 19:21:40,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928143026] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:40,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506188664] [2022-03-17 19:21:40,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:40,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:40,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:40,250 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:21:40,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 19:21:40,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:40,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 19:21:40,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:21:40,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 19:21:40,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 19:21:40,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506188664] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:21:40,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 19:21:40,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-03-17 19:21:40,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35936847] [2022-03-17 19:21:40,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:21:40,440 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 19:21:40,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:40,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 19:21:40,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-17 19:21:40,441 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:40,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:40,467 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-03-17 19:21:40,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 19:21:40,467 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 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 21 [2022-03-17 19:21:40,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:40,468 INFO L225 Difference]: With dead ends: 54 [2022-03-17 19:21:40,468 INFO L226 Difference]: Without dead ends: 49 [2022-03-17 19:21:40,468 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-17 19:21:40,469 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 25 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:21:40,470 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 169 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:21:40,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-17 19:21:40,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2022-03-17 19:21:40,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 3 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) [2022-03-17 19:21:40,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2022-03-17 19:21:40,477 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 21 [2022-03-17 19:21:40,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:40,477 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2022-03-17 19:21:40,478 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:40,478 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2022-03-17 19:21:40,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-17 19:21:40,478 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:40,478 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:40,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 19:21:40,679 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:40,679 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:40,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:40,680 INFO L85 PathProgramCache]: Analyzing trace with hash 452661009, now seen corresponding path program 1 times [2022-03-17 19:21:40,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:40,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562996021] [2022-03-17 19:21:40,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:40,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:40,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:40,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 19:21:40,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:40,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562996021] [2022-03-17 19:21:40,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562996021] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:40,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929687914] [2022-03-17 19:21:40,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:40,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:40,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:40,780 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:21:40,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 19:21:40,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:40,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 19:21:40,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:21:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 19:21:40,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 19:21:40,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929687914] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:21:40,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 19:21:40,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-03-17 19:21:40,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791686905] [2022-03-17 19:21:40,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:21:40,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 19:21:40,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:40,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 19:21:40,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-17 19:21:40,909 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:40,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:40,942 INFO L93 Difference]: Finished difference Result 99 states and 132 transitions. [2022-03-17 19:21:40,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 19:21:40,942 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 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 27 [2022-03-17 19:21:40,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:40,943 INFO L225 Difference]: With dead ends: 99 [2022-03-17 19:21:40,943 INFO L226 Difference]: Without dead ends: 70 [2022-03-17 19:21:40,944 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-17 19:21:40,945 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:21:40,945 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 67 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:21:40,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-17 19:21:40,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2022-03-17 19:21:40,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 3 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) [2022-03-17 19:21:40,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2022-03-17 19:21:40,951 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 27 [2022-03-17 19:21:40,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:40,951 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2022-03-17 19:21:40,951 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:40,952 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2022-03-17 19:21:40,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 19:21:40,952 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:40,952 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:40,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 19:21:41,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-17 19:21:41,168 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:41,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:41,168 INFO L85 PathProgramCache]: Analyzing trace with hash -302875202, now seen corresponding path program 1 times [2022-03-17 19:21:41,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:41,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836266329] [2022-03-17 19:21:41,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:41,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:41,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:41,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:41,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:41,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-17 19:21:41,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:41,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836266329] [2022-03-17 19:21:41,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836266329] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:41,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112130812] [2022-03-17 19:21:41,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:41,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:41,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:41,237 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:21:41,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 19:21:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:41,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-17 19:21:41,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:21:41,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-17 19:21:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 19:21:41,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 19:21:41,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112130812] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:21:41,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 19:21:41,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2022-03-17 19:21:41,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922398025] [2022-03-17 19:21:41,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:21:41,435 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 19:21:41,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:41,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 19:21:41,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-17 19:21:41,437 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:41,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:41,508 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2022-03-17 19:21:41,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 19:21:41,509 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 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 28 [2022-03-17 19:21:41,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:41,509 INFO L225 Difference]: With dead ends: 66 [2022-03-17 19:21:41,509 INFO L226 Difference]: Without dead ends: 44 [2022-03-17 19:21:41,510 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-03-17 19:21:41,510 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 32 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:21:41,511 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 123 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:21:41,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-17 19:21:41,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-17 19:21:41,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 3 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) [2022-03-17 19:21:41,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2022-03-17 19:21:41,515 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 28 [2022-03-17 19:21:41,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:41,515 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2022-03-17 19:21:41,515 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:41,515 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2022-03-17 19:21:41,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 19:21:41,516 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:41,516 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:41,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 19:21:41,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:41,731 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:41,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:41,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1691240082, now seen corresponding path program 1 times [2022-03-17 19:21:41,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:41,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828879948] [2022-03-17 19:21:41,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:41,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:41,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 19:21:41,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:41,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828879948] [2022-03-17 19:21:41,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828879948] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:41,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218590863] [2022-03-17 19:21:41,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:41,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:41,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:41,794 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:21:41,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 19:21:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:41,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-17 19:21:41,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:21:41,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-17 19:21:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-17 19:21:41,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:21:42,040 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-17 19:21:42,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-17 19:21:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-17 19:21:42,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218590863] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:21:42,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:21:42,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 7] total 15 [2022-03-17 19:21:42,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854124564] [2022-03-17 19:21:42,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:21:42,074 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-17 19:21:42,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:42,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-17 19:21:42,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-17 19:21:42,075 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:42,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:42,408 INFO L93 Difference]: Finished difference Result 165 states and 224 transitions. [2022-03-17 19:21:42,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-17 19:21:42,409 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-17 19:21:42,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:42,409 INFO L225 Difference]: With dead ends: 165 [2022-03-17 19:21:42,410 INFO L226 Difference]: Without dead ends: 130 [2022-03-17 19:21:42,410 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2022-03-17 19:21:42,411 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 285 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 19:21:42,411 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 62 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 19:21:42,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-17 19:21:42,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 48. [2022-03-17 19:21:42,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 3 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) [2022-03-17 19:21:42,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2022-03-17 19:21:42,438 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 29 [2022-03-17 19:21:42,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:42,438 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2022-03-17 19:21:42,438 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:42,439 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2022-03-17 19:21:42,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-17 19:21:42,439 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:42,439 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:42,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 19:21:42,653 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:42,654 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:42,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:42,654 INFO L85 PathProgramCache]: Analyzing trace with hash 671956355, now seen corresponding path program 1 times [2022-03-17 19:21:42,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:42,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432630782] [2022-03-17 19:21:42,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:42,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:42,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:42,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-17 19:21:42,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:42,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432630782] [2022-03-17 19:21:42,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432630782] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:42,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240829875] [2022-03-17 19:21:42,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:42,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:42,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:42,730 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:21:42,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 19:21:42,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:42,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-17 19:21:42,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:21:42,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 19:21:42,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:21:42,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-17 19:21:42,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240829875] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:21:42,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:21:42,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 11 [2022-03-17 19:21:42,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651652007] [2022-03-17 19:21:42,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:21:42,897 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 19:21:42,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:42,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 19:21:42,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-03-17 19:21:42,897 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:43,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:43,440 INFO L93 Difference]: Finished difference Result 325 states and 469 transitions. [2022-03-17 19:21:43,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-17 19:21:43,440 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-17 19:21:43,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:43,441 INFO L225 Difference]: With dead ends: 325 [2022-03-17 19:21:43,441 INFO L226 Difference]: Without dead ends: 288 [2022-03-17 19:21:43,442 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=281, Invalid=909, Unknown=0, NotChecked=0, Total=1190 [2022-03-17 19:21:43,442 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 384 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 19:21:43,443 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 71 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 19:21:43,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-03-17 19:21:43,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 72. [2022-03-17 19:21:43,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.2985074626865671) internal successors, (87), 67 states have internal predecessors, (87), 3 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) [2022-03-17 19:21:43,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 91 transitions. [2022-03-17 19:21:43,453 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 91 transitions. Word has length 32 [2022-03-17 19:21:43,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:43,453 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 91 transitions. [2022-03-17 19:21:43,453 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:43,453 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 91 transitions. [2022-03-17 19:21:43,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-17 19:21:43,454 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:43,454 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:43,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 19:21:43,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:43,671 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:43,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:43,671 INFO L85 PathProgramCache]: Analyzing trace with hash 901240101, now seen corresponding path program 2 times [2022-03-17 19:21:43,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:43,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791760959] [2022-03-17 19:21:43,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:43,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:43,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:43,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-17 19:21:43,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:43,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791760959] [2022-03-17 19:21:43,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791760959] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:43,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182733917] [2022-03-17 19:21:43,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 19:21:43,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:43,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:43,752 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:21:43,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 19:21:43,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 19:21:43,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:21:43,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-17 19:21:43,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:21:43,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-17 19:21:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-17 19:21:43,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:21:44,106 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-17 19:21:44,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-03-17 19:21:44,149 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-17 19:21:44,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182733917] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:21:44,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:21:44,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 9] total 22 [2022-03-17 19:21:44,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093997823] [2022-03-17 19:21:44,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:21:44,150 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-17 19:21:44,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:44,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-17 19:21:44,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-03-17 19:21:44,151 INFO L87 Difference]: Start difference. First operand 72 states and 91 transitions. Second operand has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:44,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:44,961 INFO L93 Difference]: Finished difference Result 465 states and 620 transitions. [2022-03-17 19:21:44,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-17 19:21:44,961 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-03-17 19:21:44,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:44,963 INFO L225 Difference]: With dead ends: 465 [2022-03-17 19:21:44,963 INFO L226 Difference]: Without dead ends: 406 [2022-03-17 19:21:44,965 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=371, Invalid=1699, Unknown=0, NotChecked=0, Total=2070 [2022-03-17 19:21:44,965 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 969 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-17 19:21:44,965 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [969 Valid, 108 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-17 19:21:44,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-03-17 19:21:44,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 95. [2022-03-17 19:21:44,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.288888888888889) internal successors, (116), 90 states have internal predecessors, (116), 3 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) [2022-03-17 19:21:44,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 120 transitions. [2022-03-17 19:21:44,979 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 120 transitions. Word has length 39 [2022-03-17 19:21:44,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:44,979 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 120 transitions. [2022-03-17 19:21:44,979 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:44,979 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 120 transitions. [2022-03-17 19:21:44,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-17 19:21:44,980 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:44,980 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:44,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 19:21:45,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:45,188 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:45,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:45,188 INFO L85 PathProgramCache]: Analyzing trace with hash 897642276, now seen corresponding path program 1 times [2022-03-17 19:21:45,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:45,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247231457] [2022-03-17 19:21:45,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:45,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:45,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:45,248 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-17 19:21:45,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:45,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247231457] [2022-03-17 19:21:45,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247231457] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:45,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498070787] [2022-03-17 19:21:45,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:45,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:45,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:45,249 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:21:45,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 19:21:45,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:45,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-17 19:21:45,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:21:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-17 19:21:45,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:21:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-17 19:21:45,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498070787] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:21:45,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:21:45,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 5] total 14 [2022-03-17 19:21:45,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143396267] [2022-03-17 19:21:45,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:21:45,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-17 19:21:45,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:45,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-17 19:21:45,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-17 19:21:45,480 INFO L87 Difference]: Start difference. First operand 95 states and 120 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:46,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:46,670 INFO L93 Difference]: Finished difference Result 646 states and 965 transitions. [2022-03-17 19:21:46,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-17 19:21:46,671 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-03-17 19:21:46,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:46,672 INFO L225 Difference]: With dead ends: 646 [2022-03-17 19:21:46,672 INFO L226 Difference]: Without dead ends: 566 [2022-03-17 19:21:46,674 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=624, Invalid=2346, Unknown=0, NotChecked=0, Total=2970 [2022-03-17 19:21:46,674 INFO L912 BasicCegarLoop]: 82 mSDtfsCounter, 939 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1034 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 1034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-17 19:21:46,674 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [939 Valid, 119 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 1034 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-17 19:21:46,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-03-17 19:21:46,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 183. [2022-03-17 19:21:46,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.297752808988764) internal successors, (231), 178 states have internal predecessors, (231), 3 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) [2022-03-17 19:21:46,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 235 transitions. [2022-03-17 19:21:46,694 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 235 transitions. Word has length 42 [2022-03-17 19:21:46,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:46,695 INFO L478 AbstractCegarLoop]: Abstraction has 183 states and 235 transitions. [2022-03-17 19:21:46,695 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:46,695 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 235 transitions. [2022-03-17 19:21:46,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-17 19:21:46,696 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:46,696 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:46,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 19:21:46,907 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:46,907 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:46,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:46,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1148183642, now seen corresponding path program 1 times [2022-03-17 19:21:46,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:46,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079022350] [2022-03-17 19:21:46,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:46,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:46,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-03-17 19:21:46,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:46,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079022350] [2022-03-17 19:21:46,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079022350] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:46,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348632336] [2022-03-17 19:21:46,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:46,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:46,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:46,995 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:21:46,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 19:21:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:47,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 19:21:47,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:21:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-03-17 19:21:47,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:21:47,332 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-03-17 19:21:47,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348632336] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:21:47,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:21:47,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2022-03-17 19:21:47,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396158217] [2022-03-17 19:21:47,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:21:47,333 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-17 19:21:47,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:47,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-17 19:21:47,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-03-17 19:21:47,334 INFO L87 Difference]: Start difference. First operand 183 states and 235 transitions. Second operand has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:49,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:49,662 INFO L93 Difference]: Finished difference Result 1129 states and 1600 transitions. [2022-03-17 19:21:49,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-17 19:21:49,662 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-17 19:21:49,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:49,666 INFO L225 Difference]: With dead ends: 1129 [2022-03-17 19:21:49,666 INFO L226 Difference]: Without dead ends: 963 [2022-03-17 19:21:49,670 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1858 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1099, Invalid=5381, Unknown=0, NotChecked=0, Total=6480 [2022-03-17 19:21:49,670 INFO L912 BasicCegarLoop]: 143 mSDtfsCounter, 1743 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 2482 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1743 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 3019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 2482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-17 19:21:49,671 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1743 Valid, 190 Invalid, 3019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 2482 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-17 19:21:49,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-03-17 19:21:49,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 257. [2022-03-17 19:21:49,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.3055555555555556) internal successors, (329), 252 states have internal predecessors, (329), 3 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) [2022-03-17 19:21:49,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 333 transitions. [2022-03-17 19:21:49,708 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 333 transitions. Word has length 68 [2022-03-17 19:21:49,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:49,708 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 333 transitions. [2022-03-17 19:21:49,708 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:49,708 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 333 transitions. [2022-03-17 19:21:49,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-17 19:21:49,709 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:49,709 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:49,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 19:21:49,912 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-17 19:21:49,913 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:49,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:49,913 INFO L85 PathProgramCache]: Analyzing trace with hash 171263176, now seen corresponding path program 2 times [2022-03-17 19:21:49,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:49,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899403479] [2022-03-17 19:21:49,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:49,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:50,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-03-17 19:21:50,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:50,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899403479] [2022-03-17 19:21:50,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899403479] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:50,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829022998] [2022-03-17 19:21:50,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 19:21:50,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:50,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:50,061 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:21:50,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 19:21:50,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 19:21:50,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:21:50,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-17 19:21:50,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:21:50,387 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 2 proven. 92 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-03-17 19:21:50,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:21:50,628 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 2 proven. 92 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-03-17 19:21:50,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829022998] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:21:50,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:21:50,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2022-03-17 19:21:50,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949461576] [2022-03-17 19:21:50,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:21:50,630 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-17 19:21:50,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:50,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-17 19:21:50,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-03-17 19:21:50,631 INFO L87 Difference]: Start difference. First operand 257 states and 333 transitions. Second operand has 28 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 27 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:54,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:21:54,404 INFO L93 Difference]: Finished difference Result 1394 states and 1888 transitions. [2022-03-17 19:21:54,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-17 19:21:54,405 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 27 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-03-17 19:21:54,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:21:54,408 INFO L225 Difference]: With dead ends: 1394 [2022-03-17 19:21:54,408 INFO L226 Difference]: Without dead ends: 1156 [2022-03-17 19:21:54,410 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3725 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1475, Invalid=11635, Unknown=0, NotChecked=0, Total=13110 [2022-03-17 19:21:54,411 INFO L912 BasicCegarLoop]: 248 mSDtfsCounter, 2231 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 7054 mSolverCounterSat, 735 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2231 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 7789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 735 IncrementalHoareTripleChecker+Valid, 7054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-17 19:21:54,411 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2231 Valid, 320 Invalid, 7789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [735 Valid, 7054 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-17 19:21:54,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2022-03-17 19:21:54,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 283. [2022-03-17 19:21:54,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 278 states have (on average 1.29136690647482) internal successors, (359), 278 states have internal predecessors, (359), 3 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) [2022-03-17 19:21:54,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 363 transitions. [2022-03-17 19:21:54,448 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 363 transitions. Word has length 88 [2022-03-17 19:21:54,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:21:54,448 INFO L478 AbstractCegarLoop]: Abstraction has 283 states and 363 transitions. [2022-03-17 19:21:54,448 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 27 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:21:54,449 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 363 transitions. [2022-03-17 19:21:54,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-17 19:21:54,449 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:21:54,450 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:21:54,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 19:21:54,667 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:54,667 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:21:54,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:21:54,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1294175702, now seen corresponding path program 3 times [2022-03-17 19:21:54,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:21:54,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431895702] [2022-03-17 19:21:54,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:21:54,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:21:54,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:54,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:21:54,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:21:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-03-17 19:21:54,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:21:54,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431895702] [2022-03-17 19:21:54,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431895702] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:21:54,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247357697] [2022-03-17 19:21:54,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 19:21:54,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:21:54,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:21:54,801 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:21:54,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 19:21:55,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-17 19:21:55,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:21:55,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-17 19:21:55,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:21:55,268 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-03-17 19:21:55,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:21:55,769 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-03-17 19:21:55,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247357697] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:21:55,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:21:55,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 16] total 26 [2022-03-17 19:21:55,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380550110] [2022-03-17 19:21:55,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:21:55,770 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-17 19:21:55,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:21:55,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-17 19:21:55,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2022-03-17 19:21:55,771 INFO L87 Difference]: Start difference. First operand 283 states and 363 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:22:19,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:22:19,337 INFO L93 Difference]: Finished difference Result 4633 states and 6144 transitions. [2022-03-17 19:22:19,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-17 19:22:19,337 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-03-17 19:22:19,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:22:19,348 INFO L225 Difference]: With dead ends: 4633 [2022-03-17 19:22:19,348 INFO L226 Difference]: Without dead ends: 4371 [2022-03-17 19:22:19,351 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5004 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=2549, Invalid=12213, Unknown=0, NotChecked=0, Total=14762 [2022-03-17 19:22:19,352 INFO L912 BasicCegarLoop]: 210 mSDtfsCounter, 2769 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2564 mSolverCounterSat, 622 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2769 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 3186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 622 IncrementalHoareTripleChecker+Valid, 2564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:22:19,352 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2769 Valid, 272 Invalid, 3186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [622 Valid, 2564 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-03-17 19:22:19,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2022-03-17 19:22:19,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 301. [2022-03-17 19:22:19,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 296 states have (on average 1.277027027027027) internal successors, (378), 296 states have internal predecessors, (378), 3 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) [2022-03-17 19:22:19,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 382 transitions. [2022-03-17 19:22:19,420 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 382 transitions. Word has length 96 [2022-03-17 19:22:19,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:22:19,420 INFO L478 AbstractCegarLoop]: Abstraction has 301 states and 382 transitions. [2022-03-17 19:22:19,420 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:22:19,420 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 382 transitions. [2022-03-17 19:22:19,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-17 19:22:19,421 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:22:19,421 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:22:19,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-17 19:22:19,626 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-17 19:22:19,627 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:22:19,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:22:19,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1837140656, now seen corresponding path program 4 times [2022-03-17 19:22:19,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:22:19,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751307722] [2022-03-17 19:22:19,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:22:19,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:22:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:20,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:22:20,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2022-03-17 19:22:20,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:22:20,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751307722] [2022-03-17 19:22:20,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751307722] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:22:20,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096155048] [2022-03-17 19:22:20,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 19:22:20,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:22:20,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:22:20,106 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:22:20,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-17 19:22:20,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 19:22:20,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:22:20,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-17 19:22:20,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:22:20,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-17 19:22:20,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-17 19:22:20,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-17 19:22:20,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-17 19:22:20,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-17 19:22:20,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-17 19:22:20,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-17 19:22:20,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-17 19:22:20,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-17 19:22:20,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-17 19:22:20,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-17 19:22:20,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-17 19:22:21,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-17 19:22:21,402 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-03-17 19:22:21,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 23 [2022-03-17 19:22:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 91 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-03-17 19:22:21,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:22:22,165 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_345 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_345) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_345 |c_main_~#string_entrada~0.offset|))) (or (< .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< (select .cse1 |c_main_~#vetor_vogais~0.offset|) .cse0)))) is different from false [2022-03-17 19:22:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 107 proven. 11 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-17 19:22:22,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096155048] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:22:22,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:22:22,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 18] total 46 [2022-03-17 19:22:22,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855960586] [2022-03-17 19:22:22,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:22:22,313 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-17 19:22:22,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:22:22,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-17 19:22:22,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1793, Unknown=1, NotChecked=86, Total=2070 [2022-03-17 19:22:22,314 INFO L87 Difference]: Start difference. First operand 301 states and 382 transitions. Second operand has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 45 states have internal predecessors, (121), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:22:31,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:22:31,480 INFO L93 Difference]: Finished difference Result 1195 states and 1560 transitions. [2022-03-17 19:22:31,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-03-17 19:22:31,481 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 45 states have internal predecessors, (121), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-17 19:22:31,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:22:31,483 INFO L225 Difference]: With dead ends: 1195 [2022-03-17 19:22:31,483 INFO L226 Difference]: Without dead ends: 1087 [2022-03-17 19:22:31,489 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10023 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=3180, Invalid=29043, Unknown=1, NotChecked=356, Total=32580 [2022-03-17 19:22:31,489 INFO L912 BasicCegarLoop]: 79 mSDtfsCounter, 1788 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 4440 mSolverCounterSat, 742 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1788 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 5485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 742 IncrementalHoareTripleChecker+Valid, 4440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-17 19:22:31,490 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1788 Valid, 194 Invalid, 5485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [742 Valid, 4440 Invalid, 0 Unknown, 303 Unchecked, 2.4s Time] [2022-03-17 19:22:31,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2022-03-17 19:22:31,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 420. [2022-03-17 19:22:31,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 415 states have (on average 1.274698795180723) internal successors, (529), 415 states have internal predecessors, (529), 3 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) [2022-03-17 19:22:31,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 533 transitions. [2022-03-17 19:22:31,578 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 533 transitions. Word has length 102 [2022-03-17 19:22:31,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:22:31,578 INFO L478 AbstractCegarLoop]: Abstraction has 420 states and 533 transitions. [2022-03-17 19:22:31,578 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 45 states have internal predecessors, (121), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:22:31,578 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 533 transitions. [2022-03-17 19:22:31,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-17 19:22:31,579 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:22:31,579 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:22:31,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-17 19:22:31,785 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-17 19:22:31,785 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:22:31,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:22:31,785 INFO L85 PathProgramCache]: Analyzing trace with hash 983559120, now seen corresponding path program 1 times [2022-03-17 19:22:31,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:22:31,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552584049] [2022-03-17 19:22:31,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:22:31,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:22:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:32,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:22:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:32,288 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-17 19:22:32,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:22:32,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552584049] [2022-03-17 19:22:32,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552584049] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:22:32,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150559807] [2022-03-17 19:22:32,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:22:32,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:22:32,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:22:32,290 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:22:32,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-17 19:22:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:32,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-17 19:22:32,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:22:32,801 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-17 19:22:32,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-17 19:22:32,853 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-17 19:22:32,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:22:33,077 INFO L356 Elim1Store]: treesize reduction 27, result has 68.2 percent of original size [2022-03-17 19:22:33,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 65 [2022-03-17 19:22:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-17 19:22:33,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150559807] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:22:33,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:22:33,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 9] total 31 [2022-03-17 19:22:33,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206734227] [2022-03-17 19:22:33,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:22:33,200 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-17 19:22:33,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:22:33,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-17 19:22:33,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2022-03-17 19:22:33,201 INFO L87 Difference]: Start difference. First operand 420 states and 533 transitions. Second operand has 31 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 30 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:22:36,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:22:36,065 INFO L93 Difference]: Finished difference Result 1075 states and 1380 transitions. [2022-03-17 19:22:36,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-17 19:22:36,065 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 30 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-17 19:22:36,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:22:36,068 INFO L225 Difference]: With dead ends: 1075 [2022-03-17 19:22:36,068 INFO L226 Difference]: Without dead ends: 894 [2022-03-17 19:22:36,069 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1838 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=868, Invalid=6964, Unknown=0, NotChecked=0, Total=7832 [2022-03-17 19:22:36,070 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 539 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2672 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-17 19:22:36,071 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 146 Invalid, 2878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2672 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-17 19:22:36,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-03-17 19:22:36,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 542. [2022-03-17 19:22:36,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 537 states have (on average 1.2681564245810055) internal successors, (681), 537 states have internal predecessors, (681), 3 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) [2022-03-17 19:22:36,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 685 transitions. [2022-03-17 19:22:36,186 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 685 transitions. Word has length 102 [2022-03-17 19:22:36,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:22:36,186 INFO L478 AbstractCegarLoop]: Abstraction has 542 states and 685 transitions. [2022-03-17 19:22:36,186 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 30 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:22:36,186 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 685 transitions. [2022-03-17 19:22:36,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-17 19:22:36,187 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:22:36,188 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:22:36,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-17 19:22:36,401 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-17 19:22:36,401 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:22:36,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:22:36,401 INFO L85 PathProgramCache]: Analyzing trace with hash -709416465, now seen corresponding path program 2 times [2022-03-17 19:22:36,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:22:36,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272229173] [2022-03-17 19:22:36,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:22:36,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:22:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:36,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:22:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:36,766 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-03-17 19:22:36,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:22:36,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272229173] [2022-03-17 19:22:36,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272229173] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:22:36,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8641599] [2022-03-17 19:22:36,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 19:22:36,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:22:36,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:22:36,767 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:22:36,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-17 19:22:36,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 19:22:36,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:22:36,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-17 19:22:36,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:22:37,578 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-17 19:22:37,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-17 19:22:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 96 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-03-17 19:22:37,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:22:38,056 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-03-17 19:22:38,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 110 [2022-03-17 19:22:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 102 proven. 21 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-03-17 19:22:38,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8641599] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:22:38,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:22:38,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 15] total 41 [2022-03-17 19:22:38,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060410972] [2022-03-17 19:22:38,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:22:38,270 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-17 19:22:38,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:22:38,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-17 19:22:38,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1448, Unknown=0, NotChecked=0, Total=1640 [2022-03-17 19:22:38,271 INFO L87 Difference]: Start difference. First operand 542 states and 685 transitions. Second operand has 41 states, 41 states have (on average 3.097560975609756) internal successors, (127), 40 states have internal predecessors, (127), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:22:43,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:22:43,601 INFO L93 Difference]: Finished difference Result 1753 states and 2254 transitions. [2022-03-17 19:22:43,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-17 19:22:43,602 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.097560975609756) internal successors, (127), 40 states have internal predecessors, (127), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-17 19:22:43,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:22:43,607 INFO L225 Difference]: With dead ends: 1753 [2022-03-17 19:22:43,607 INFO L226 Difference]: Without dead ends: 1482 [2022-03-17 19:22:43,609 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6955 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2226, Invalid=19826, Unknown=0, NotChecked=0, Total=22052 [2022-03-17 19:22:43,610 INFO L912 BasicCegarLoop]: 73 mSDtfsCounter, 1473 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 3582 mSolverCounterSat, 571 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1473 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 4153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 571 IncrementalHoareTripleChecker+Valid, 3582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-17 19:22:43,610 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1473 Valid, 168 Invalid, 4153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [571 Valid, 3582 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-17 19:22:43,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2022-03-17 19:22:43,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 579. [2022-03-17 19:22:43,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 574 states have (on average 1.2526132404181185) internal successors, (719), 574 states have internal predecessors, (719), 3 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) [2022-03-17 19:22:43,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 723 transitions. [2022-03-17 19:22:43,779 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 723 transitions. Word has length 102 [2022-03-17 19:22:43,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:22:43,780 INFO L478 AbstractCegarLoop]: Abstraction has 579 states and 723 transitions. [2022-03-17 19:22:43,780 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.097560975609756) internal successors, (127), 40 states have internal predecessors, (127), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:22:43,780 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 723 transitions. [2022-03-17 19:22:43,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-17 19:22:43,781 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:22:43,781 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:22:43,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-17 19:22:43,998 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-17 19:22:43,998 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:22:43,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:22:43,998 INFO L85 PathProgramCache]: Analyzing trace with hash -366375887, now seen corresponding path program 3 times [2022-03-17 19:22:43,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:22:43,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629722225] [2022-03-17 19:22:43,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:22:43,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:22:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:44,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:22:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:22:44,359 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 52 proven. 26 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-17 19:22:44,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:22:44,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629722225] [2022-03-17 19:22:44,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629722225] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:22:44,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981889303] [2022-03-17 19:22:44,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 19:22:44,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:22:44,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:22:44,361 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:22:44,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-17 19:22:44,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-17 19:22:44,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:22:44,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-17 19:22:44,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:22:46,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-17 19:22:46,067 INFO L356 Elim1Store]: treesize reduction 46, result has 63.8 percent of original size [2022-03-17 19:22:46,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 61 treesize of output 97 [2022-03-17 19:22:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 19 proven. 141 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-03-17 19:22:46,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:22:52,725 INFO L356 Elim1Store]: treesize reduction 204, result has 25.8 percent of original size [2022-03-17 19:22:52,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 82 treesize of output 86 [2022-03-17 19:22:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 13 proven. 147 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-03-17 19:22:52,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981889303] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:22:52,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:22:52,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 24, 20] total 52 [2022-03-17 19:22:52,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888205842] [2022-03-17 19:22:52,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:22:52,950 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-17 19:22:52,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:22:52,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-17 19:22:52,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=2238, Unknown=0, NotChecked=0, Total=2652 [2022-03-17 19:22:52,951 INFO L87 Difference]: Start difference. First operand 579 states and 723 transitions. Second operand has 52 states, 52 states have (on average 2.7115384615384617) internal successors, (141), 51 states have internal predecessors, (141), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:23:33,182 WARN L232 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 100 DAG size of output: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 19:23:57,742 WARN L232 SmtUtils]: Spent 8.28s on a formula simplification. DAG size of input: 76 DAG size of output: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 19:24:07,516 WARN L232 SmtUtils]: Spent 8.41s on a formula simplification. DAG size of input: 89 DAG size of output: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 19:24:18,329 WARN L232 SmtUtils]: Spent 10.54s on a formula simplification. DAG size of input: 85 DAG size of output: 83 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 19:24:43,991 WARN L232 SmtUtils]: Spent 6.70s on a formula simplification. DAG size of input: 84 DAG size of output: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 19:25:03,133 WARN L232 SmtUtils]: Spent 11.02s on a formula simplification. DAG size of input: 88 DAG size of output: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 19:25:27,612 WARN L232 SmtUtils]: Spent 13.09s on a formula simplification. DAG size of input: 105 DAG size of output: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 19:25:57,073 WARN L232 SmtUtils]: Spent 12.74s on a formula simplification. DAG size of input: 92 DAG size of output: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 19:26:17,413 WARN L232 SmtUtils]: Spent 7.67s on a formula simplification. DAG size of input: 72 DAG size of output: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 19:26:58,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:26:58,165 INFO L93 Difference]: Finished difference Result 2546 states and 3174 transitions. [2022-03-17 19:26:58,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-03-17 19:26:58,165 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.7115384615384617) internal successors, (141), 51 states have internal predecessors, (141), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-17 19:26:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:26:58,170 INFO L225 Difference]: With dead ends: 2546 [2022-03-17 19:26:58,170 INFO L226 Difference]: Without dead ends: 2241 [2022-03-17 19:26:58,172 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 204 SyntacticMatches, 14 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13271 ImplicationChecksByTransitivity, 245.6s TimeCoverageRelationStatistics Valid=4724, Invalid=30410, Unknown=22, NotChecked=0, Total=35156 [2022-03-17 19:26:58,172 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 583 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 2350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1311 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-17 19:26:58,173 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [583 Valid, 183 Invalid, 2350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 694 Invalid, 0 Unknown, 1311 Unchecked, 1.1s Time] [2022-03-17 19:26:58,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2022-03-17 19:26:58,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 1369. [2022-03-17 19:26:58,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1364 states have (on average 1.2580645161290323) internal successors, (1716), 1364 states have internal predecessors, (1716), 3 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) [2022-03-17 19:26:58,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 1720 transitions. [2022-03-17 19:26:58,569 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 1720 transitions. Word has length 102 [2022-03-17 19:26:58,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:26:58,569 INFO L478 AbstractCegarLoop]: Abstraction has 1369 states and 1720 transitions. [2022-03-17 19:26:58,569 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.7115384615384617) internal successors, (141), 51 states have internal predecessors, (141), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:26:58,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 1720 transitions. [2022-03-17 19:26:58,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-17 19:26:58,572 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:26:58,572 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:26:58,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-17 19:26:58,777 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:26:58,777 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:26:58,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:26:58,777 INFO L85 PathProgramCache]: Analyzing trace with hash -183517359, now seen corresponding path program 4 times [2022-03-17 19:26:58,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:26:58,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807647385] [2022-03-17 19:26:58,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:26:58,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:26:58,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:26:59,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:26:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:26:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-03-17 19:26:59,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:26:59,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807647385] [2022-03-17 19:26:59,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807647385] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:26:59,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590506599] [2022-03-17 19:26:59,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 19:26:59,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:26:59,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:26:59,125 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:26:59,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-17 19:26:59,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 19:26:59,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:26:59,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-17 19:26:59,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:26:59,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-17 19:26:59,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-17 19:26:59,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-17 19:26:59,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-17 19:26:59,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-17 19:26:59,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-17 19:26:59,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-17 19:26:59,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-17 19:26:59,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-17 19:26:59,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-17 19:26:59,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-17 19:26:59,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-17 19:27:00,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-17 19:27:00,238 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-03-17 19:27:00,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 23 [2022-03-17 19:27:00,292 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 57 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-17 19:27:00,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:27:00,763 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_574 (Array Int Int))) (let ((.cse1 (select v_ArrVal_574 |c_main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_574) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse1) (< .cse1 (select .cse0 |c_main_~#vetor_vogais~0.offset|))))) is different from false [2022-03-17 19:27:00,908 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 72 proven. 5 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-03-17 19:27:00,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590506599] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:27:00,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:27:00,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 15] total 38 [2022-03-17 19:27:00,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985537734] [2022-03-17 19:27:00,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:27:00,909 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-17 19:27:00,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:27:00,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-17 19:27:00,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1180, Unknown=1, NotChecked=70, Total=1406 [2022-03-17 19:27:00,909 INFO L87 Difference]: Start difference. First operand 1369 states and 1720 transitions. Second operand has 38 states, 38 states have (on average 2.8684210526315788) internal successors, (109), 37 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:27:06,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:27:06,450 INFO L93 Difference]: Finished difference Result 3205 states and 4041 transitions. [2022-03-17 19:27:06,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-17 19:27:06,451 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.8684210526315788) internal successors, (109), 37 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-17 19:27:06,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:27:06,456 INFO L225 Difference]: With dead ends: 3205 [2022-03-17 19:27:06,456 INFO L226 Difference]: Without dead ends: 2090 [2022-03-17 19:27:06,459 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3970 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1890, Invalid=12633, Unknown=1, NotChecked=238, Total=14762 [2022-03-17 19:27:06,460 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 1032 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2597 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1032 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 3237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 2597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-17 19:27:06,460 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1032 Valid, 144 Invalid, 3237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 2597 Invalid, 0 Unknown, 177 Unchecked, 1.5s Time] [2022-03-17 19:27:06,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2022-03-17 19:27:06,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 1383. [2022-03-17 19:27:06,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1378 states have (on average 1.2467343976777938) internal successors, (1718), 1378 states have internal predecessors, (1718), 3 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) [2022-03-17 19:27:06,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 1722 transitions. [2022-03-17 19:27:06,879 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 1722 transitions. Word has length 102 [2022-03-17 19:27:06,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:27:06,879 INFO L478 AbstractCegarLoop]: Abstraction has 1383 states and 1722 transitions. [2022-03-17 19:27:06,879 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.8684210526315788) internal successors, (109), 37 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:27:06,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 1722 transitions. [2022-03-17 19:27:06,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-17 19:27:06,881 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:27:06,881 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:27:06,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-17 19:27:07,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-17 19:27:07,095 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:27:07,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:27:07,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1078493264, now seen corresponding path program 5 times [2022-03-17 19:27:07,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:27:07,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812135713] [2022-03-17 19:27:07,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:27:07,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:27:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:27:07,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:27:07,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:27:07,683 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 82 proven. 127 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-03-17 19:27:07,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:27:07,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812135713] [2022-03-17 19:27:07,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812135713] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:27:07,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744875284] [2022-03-17 19:27:07,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 19:27:07,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:27:07,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:27:07,685 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:27:07,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-17 19:27:16,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-17 19:27:16,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:27:16,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 106 conjunts are in the unsatisfiable core [2022-03-17 19:27:16,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:28:19,098 WARN L232 SmtUtils]: Spent 27.39s on a formula simplification. DAG size of input: 383 DAG size of output: 97 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-03-17 19:28:19,099 INFO L356 Elim1Store]: treesize reduction 1354, result has 14.1 percent of original size [2022-03-17 19:28:19,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 237 treesize of output 263