/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/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 03:38:16,598 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 03:38:16,600 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 03:38:16,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 03:38:16,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 03:38:16,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 03:38:16,637 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 03:38:16,643 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 03:38:16,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 03:38:16,650 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 03:38:16,650 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 03:38:16,651 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 03:38:16,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 03:38:16,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 03:38:16,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 03:38:16,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 03:38:16,654 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 03:38:16,655 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 03:38:16,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 03:38:16,657 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 03:38:16,658 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 03:38:16,661 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 03:38:16,663 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 03:38:16,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 03:38:16,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 03:38:16,675 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 03:38:16,676 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 03:38:16,676 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 03:38:16,677 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 03:38:16,678 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 03:38:16,679 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 03:38:16,679 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 03:38:16,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 03:38:16,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 03:38:16,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 03:38:16,682 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 03:38:16,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 03:38:16,683 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 03:38:16,684 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 03:38:16,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 03:38:16,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 03:38:16,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 03:38:16,688 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 03:38:16,702 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 03:38:16,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 03:38:16,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 03:38:16,704 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 03:38:16,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 03:38:16,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 03:38:16,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 03:38:16,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 03:38:16,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 03:38:16,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 03:38:16,705 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 03:38:16,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 03:38:16,706 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 03:38:16,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 03:38:16,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 03:38:16,706 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 03:38:16,706 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 03:38:16,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 03:38:16,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 03:38:16,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 03:38:16,707 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 03:38:16,707 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 03:38:16,708 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 03:38:16,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 03:38:16,945 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 03:38:16,947 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 03:38:16,948 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 03:38:16,951 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 03:38:16,952 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2022-03-20 03:38:17,010 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca2fe3ecc/ccb62780424b48c18b9b29a88bd40c53/FLAG688133a2f [2022-03-20 03:38:17,375 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 03:38:17,375 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2022-03-20 03:38:17,381 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca2fe3ecc/ccb62780424b48c18b9b29a88bd40c53/FLAG688133a2f [2022-03-20 03:38:17,391 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca2fe3ecc/ccb62780424b48c18b9b29a88bd40c53 [2022-03-20 03:38:17,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 03:38:17,394 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 03:38:17,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 03:38:17,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 03:38:17,400 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 03:38:17,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:38:17" (1/1) ... [2022-03-20 03:38:17,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17fbf443 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:38:17, skipping insertion in model container [2022-03-20 03:38:17,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:38:17" (1/1) ... [2022-03-20 03:38:17,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 03:38:17,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 03:38:17,615 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i[893,906] [2022-03-20 03:38:17,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 03:38:17,634 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 03:38:17,649 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i[893,906] [2022-03-20 03:38:17,656 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 03:38:17,669 INFO L208 MainTranslator]: Completed translation [2022-03-20 03:38:17,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:38:17 WrapperNode [2022-03-20 03:38:17,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 03:38:17,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 03:38:17,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 03:38:17,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 03:38:17,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:38:17" (1/1) ... [2022-03-20 03:38:17,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:38:17" (1/1) ... [2022-03-20 03:38:17,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:38:17" (1/1) ... [2022-03-20 03:38:17,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:38:17" (1/1) ... [2022-03-20 03:38:17,696 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:38:17" (1/1) ... [2022-03-20 03:38:17,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:38:17" (1/1) ... [2022-03-20 03:38:17,700 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:38:17" (1/1) ... [2022-03-20 03:38:17,701 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 03:38:17,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 03:38:17,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 03:38:17,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 03:38:17,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:38:17" (1/1) ... [2022-03-20 03:38:17,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 03:38:17,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:38:17,729 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) [2022-03-20 03:38:17,750 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 [2022-03-20 03:38:17,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 03:38:17,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 03:38:17,768 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 03:38:17,768 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 03:38:17,768 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 03:38:17,768 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 03:38:17,769 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 03:38:17,769 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 03:38:17,769 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 03:38:17,769 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 03:38:17,769 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 03:38:17,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 03:38:17,770 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 03:38:17,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 03:38:17,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 03:38:17,772 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 03:38:17,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 03:38:17,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 03:38:17,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 03:38:17,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 03:38:17,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 03:38:17,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 03:38:17,827 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 03:38:17,829 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 03:38:17,915 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 03:38:17,919 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 03:38:17,919 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 03:38:17,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:38:17 BoogieIcfgContainer [2022-03-20 03:38:17,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 03:38:17,921 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 03:38:17,921 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 03:38:17,922 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 03:38:17,924 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:38:17" (1/1) ... [2022-03-20 03:38:17,926 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 03:38:17,965 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 0 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 03:38:17,966 INFO L91 elerationTransformer]: Accelerated Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] to Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[] [2022-03-20 03:38:17,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 03:38:17 BasicIcfg [2022-03-20 03:38:17,971 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 03:38:17,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 03:38:17,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 03:38:17,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 03:38:17,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 03:38:17" (1/4) ... [2022-03-20 03:38:17,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@422c8596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:38:17, skipping insertion in model container [2022-03-20 03:38:17,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:38:17" (2/4) ... [2022-03-20 03:38:17,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@422c8596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:38:17, skipping insertion in model container [2022-03-20 03:38:17,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:38:17" (3/4) ... [2022-03-20 03:38:17,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@422c8596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 03:38:17, skipping insertion in model container [2022-03-20 03:38:17,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 03:38:17" (4/4) ... [2022-03-20 03:38:17,977 INFO L111 eAbstractionObserver]: Analyzing ICFG string_concat-noarr.iJordan [2022-03-20 03:38:17,981 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 03:38:17,982 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 03:38:18,017 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 03:38:18,022 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2022-03-20 03:38:18,023 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 03:38:18,033 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 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) [2022-03-20 03:38:18,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 03:38:18,038 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:38:18,038 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:38:18,039 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:38:18,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:38:18,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1427438595, now seen corresponding path program 1 times [2022-03-20 03:38:18,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:38:18,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773765887] [2022-03-20 03:38:18,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:38:18,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:38:18,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:18,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:38:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:18,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:18,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:38:18,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773765887] [2022-03-20 03:38:18,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773765887] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:38:18,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:38:18,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 03:38:18,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534028583] [2022-03-20 03:38:18,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:38:18,240 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 03:38:18,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:38:18,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 03:38:18,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 03:38:18,300 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-03-20 03:38:18,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:38:18,359 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-03-20 03:38:18,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 03:38:18,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 15 [2022-03-20 03:38:18,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:38:18,367 INFO L225 Difference]: With dead ends: 26 [2022-03-20 03:38:18,368 INFO L226 Difference]: Without dead ends: 18 [2022-03-20 03:38:18,369 INFO L912 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 [2022-03-20 03:38:18,372 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 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 [2022-03-20 03:38:18,373 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:38:18,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-20 03:38:18,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-03-20 03:38:18,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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) [2022-03-20 03:38:18,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-03-20 03:38:18,407 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2022-03-20 03:38:18,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:38:18,408 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-03-20 03:38:18,408 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-03-20 03:38:18,408 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-03-20 03:38:18,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 03:38:18,408 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:38:18,409 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:38:18,409 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 03:38:18,409 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:38:18,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:38:18,410 INFO L85 PathProgramCache]: Analyzing trace with hash -548355260, now seen corresponding path program 1 times [2022-03-20 03:38:18,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:38:18,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140329471] [2022-03-20 03:38:18,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:38:18,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:38:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:18,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:38:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:18,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:38:18,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140329471] [2022-03-20 03:38:18,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140329471] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:38:18,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:38:18,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 03:38:18,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720703730] [2022-03-20 03:38:18,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:38:18,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 03:38:18,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:38:18,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 03:38:18,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 03:38:18,562 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (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) [2022-03-20 03:38:18,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:38:18,671 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2022-03-20 03:38:18,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 03:38:18,672 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (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 [2022-03-20 03:38:18,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:38:18,673 INFO L225 Difference]: With dead ends: 27 [2022-03-20 03:38:18,674 INFO L226 Difference]: Without dead ends: 23 [2022-03-20 03:38:18,678 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-20 03:38:18,680 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:38:18,681 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:38:18,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-20 03:38:18,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-03-20 03:38:18,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 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) [2022-03-20 03:38:18,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-03-20 03:38:18,694 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2022-03-20 03:38:18,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:38:18,695 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-03-20 03:38:18,695 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (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) [2022-03-20 03:38:18,696 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-03-20 03:38:18,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 03:38:18,696 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:38:18,696 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:38:18,697 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 03:38:18,697 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:38:18,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:38:18,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1217379968, now seen corresponding path program 1 times [2022-03-20 03:38:18,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:38:18,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808946047] [2022-03-20 03:38:18,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:38:18,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:38:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:18,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:38:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:18,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:38:18,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808946047] [2022-03-20 03:38:18,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808946047] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:38:18,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527559955] [2022-03-20 03:38:18,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:38:18,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:38:18,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:38:18,777 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) [2022-03-20 03:38:18,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 03:38:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:18,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 03:38:18,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:38:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:18,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:38:19,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:19,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527559955] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:38:19,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:38:19,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-20 03:38:19,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403304939] [2022-03-20 03:38:19,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:38:19,082 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 03:38:19,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:38:19,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 03:38:19,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-20 03:38:19,084 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 9 states have internal predecessors, (33), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:38:19,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:38:19,237 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-03-20 03:38:19,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 03:38:19,237 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 9 states have internal predecessors, (33), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-20 03:38:19,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:38:19,239 INFO L225 Difference]: With dead ends: 50 [2022-03-20 03:38:19,239 INFO L226 Difference]: Without dead ends: 42 [2022-03-20 03:38:19,241 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-03-20 03:38:19,244 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 59 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:38:19,246 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 40 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:38:19,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-20 03:38:19,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2022-03-20 03:38:19,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 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) [2022-03-20 03:38:19,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-03-20 03:38:19,257 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 19 [2022-03-20 03:38:19,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:38:19,257 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-03-20 03:38:19,258 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 9 states have internal predecessors, (33), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:38:19,258 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-03-20 03:38:19,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 03:38:19,259 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:38:19,259 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:38:19,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 03:38:19,475 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 [2022-03-20 03:38:19,476 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:38:19,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:38:19,476 INFO L85 PathProgramCache]: Analyzing trace with hash -245336524, now seen corresponding path program 2 times [2022-03-20 03:38:19,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:38:19,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436977457] [2022-03-20 03:38:19,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:38:19,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:38:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:19,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:38:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:19,581 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:19,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:38:19,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436977457] [2022-03-20 03:38:19,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436977457] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:38:19,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323275445] [2022-03-20 03:38:19,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 03:38:19,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:38:19,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:38:19,583 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) [2022-03-20 03:38:19,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 03:38:19,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 03:38:19,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:38:19,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 03:38:19,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:38:19,724 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:19,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:38:19,849 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:19,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323275445] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:38:19,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:38:19,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-20 03:38:19,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56055474] [2022-03-20 03:38:19,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:38:19,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 03:38:19,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:38:19,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 03:38:19,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-03-20 03:38:19,852 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 15 states have internal predecessors, (45), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:38:20,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:38:20,152 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2022-03-20 03:38:20,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 03:38:20,152 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 15 states have internal predecessors, (45), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-20 03:38:20,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:38:20,155 INFO L225 Difference]: With dead ends: 94 [2022-03-20 03:38:20,156 INFO L226 Difference]: Without dead ends: 80 [2022-03-20 03:38:20,156 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2022-03-20 03:38:20,157 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 139 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 03:38:20,157 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 45 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 03:38:20,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-20 03:38:20,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 53. [2022-03-20 03:38:20,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 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) [2022-03-20 03:38:20,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2022-03-20 03:38:20,165 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 25 [2022-03-20 03:38:20,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:38:20,165 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2022-03-20 03:38:20,165 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 15 states have internal predecessors, (45), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:38:20,165 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2022-03-20 03:38:20,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 03:38:20,166 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:38:20,166 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:38:20,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 03:38:20,371 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 [2022-03-20 03:38:20,372 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:38:20,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:38:20,372 INFO L85 PathProgramCache]: Analyzing trace with hash -754687844, now seen corresponding path program 3 times [2022-03-20 03:38:20,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:38:20,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803196788] [2022-03-20 03:38:20,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:38:20,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:38:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:20,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:38:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:20,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:38:20,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803196788] [2022-03-20 03:38:20,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803196788] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:38:20,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399763534] [2022-03-20 03:38:20,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 03:38:20,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:38:20,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:38:20,528 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) [2022-03-20 03:38:20,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 03:38:20,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-20 03:38:20,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:38:20,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 03:38:20,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:38:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:20,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:38:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:21,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399763534] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:38:21,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:38:21,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-03-20 03:38:21,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198413763] [2022-03-20 03:38:21,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:38:21,017 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 03:38:21,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:38:21,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 03:38:21,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2022-03-20 03:38:21,019 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 27 states have internal predecessors, (69), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:38:21,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:38:21,655 INFO L93 Difference]: Finished difference Result 214 states and 248 transitions. [2022-03-20 03:38:21,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 03:38:21,655 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 27 states have internal predecessors, (69), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-20 03:38:21,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:38:21,657 INFO L225 Difference]: With dead ends: 214 [2022-03-20 03:38:21,657 INFO L226 Difference]: Without dead ends: 188 [2022-03-20 03:38:21,658 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=876, Invalid=1986, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 03:38:21,659 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 364 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 03:38:21,659 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 40 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 03:38:21,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-03-20 03:38:21,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 95. [2022-03-20 03:38:21,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.1444444444444444) internal successors, (103), 90 states have internal predecessors, (103), 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) [2022-03-20 03:38:21,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2022-03-20 03:38:21,667 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 37 [2022-03-20 03:38:21,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:38:21,667 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2022-03-20 03:38:21,668 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 27 states have internal predecessors, (69), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:38:21,668 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2022-03-20 03:38:21,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 03:38:21,669 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:38:21,669 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:38:21,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 03:38:21,889 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 [2022-03-20 03:38:21,890 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:38:21,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:38:21,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1007083156, now seen corresponding path program 4 times [2022-03-20 03:38:21,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:38:21,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953981936] [2022-03-20 03:38:21,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:38:21,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:38:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:22,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:38:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:22,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:38:22,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953981936] [2022-03-20 03:38:22,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953981936] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:38:22,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21185225] [2022-03-20 03:38:22,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 03:38:22,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:38:22,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:38:22,292 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) [2022-03-20 03:38:22,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 03:38:22,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 03:38:22,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:38:22,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 03:38:22,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:38:22,532 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:22,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:38:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:23,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21185225] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:38:23,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:38:23,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-03-20 03:38:23,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110627164] [2022-03-20 03:38:23,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:38:23,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-20 03:38:23,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:38:23,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-20 03:38:23,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1188, Invalid=1674, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 03:38:23,301 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 51 states have internal predecessors, (117), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:38:24,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:38:24,854 INFO L93 Difference]: Finished difference Result 562 states and 632 transitions. [2022-03-20 03:38:24,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-20 03:38:24,854 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 51 states have internal predecessors, (117), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-03-20 03:38:24,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:38:24,857 INFO L225 Difference]: With dead ends: 562 [2022-03-20 03:38:24,857 INFO L226 Difference]: Without dead ends: 512 [2022-03-20 03:38:24,860 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3456, Invalid=6846, Unknown=0, NotChecked=0, Total=10302 [2022-03-20 03:38:24,861 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 791 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 03:38:24,861 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 50 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 03:38:24,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-03-20 03:38:24,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 179. [2022-03-20 03:38:24,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.1436781609195403) internal successors, (199), 174 states have internal predecessors, (199), 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) [2022-03-20 03:38:24,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 203 transitions. [2022-03-20 03:38:24,874 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 203 transitions. Word has length 61 [2022-03-20 03:38:24,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:38:24,874 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 203 transitions. [2022-03-20 03:38:24,875 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 51 states have internal predecessors, (117), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:38:24,875 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 203 transitions. [2022-03-20 03:38:24,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-20 03:38:24,877 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:38:24,878 INFO L499 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:38:24,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 03:38:25,091 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 [2022-03-20 03:38:25,091 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:38:25,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:38:25,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1177441036, now seen corresponding path program 5 times [2022-03-20 03:38:25,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:38:25,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990375639] [2022-03-20 03:38:25,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:38:25,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:38:25,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:26,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:38:26,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:26,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:26,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:38:26,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990375639] [2022-03-20 03:38:26,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990375639] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:38:26,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858901217] [2022-03-20 03:38:26,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 03:38:26,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:38:26,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:38:26,148 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) [2022-03-20 03:38:26,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 03:38:26,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-03-20 03:38:26,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:38:26,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-20 03:38:26,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:38:26,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:26,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:38:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:28,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858901217] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:38:28,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:38:28,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-03-20 03:38:28,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836496919] [2022-03-20 03:38:28,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:38:28,942 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-03-20 03:38:28,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:38:28,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-03-20 03:38:28,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4668, Invalid=5634, Unknown=0, NotChecked=0, Total=10302 [2022-03-20 03:38:28,946 INFO L87 Difference]: Start difference. First operand 179 states and 203 transitions. Second operand has 102 states, 102 states have (on average 2.088235294117647) internal successors, (213), 99 states have internal predecessors, (213), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:38:34,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:38:34,047 INFO L93 Difference]: Finished difference Result 1690 states and 1832 transitions. [2022-03-20 03:38:34,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-20 03:38:34,047 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.088235294117647) internal successors, (213), 99 states have internal predecessors, (213), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-03-20 03:38:34,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:38:34,053 INFO L225 Difference]: With dead ends: 1690 [2022-03-20 03:38:34,053 INFO L226 Difference]: Without dead ends: 1592 [2022-03-20 03:38:34,059 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6531 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=13800, Invalid=25206, Unknown=0, NotChecked=0, Total=39006 [2022-03-20 03:38:34,060 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1712 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 793 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1712 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 793 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 03:38:34,060 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1712 Valid, 85 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [793 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 03:38:34,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2022-03-20 03:38:34,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 347. [2022-03-20 03:38:34,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 342 states have (on average 1.1432748538011697) internal successors, (391), 342 states have internal predecessors, (391), 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) [2022-03-20 03:38:34,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 395 transitions. [2022-03-20 03:38:34,078 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 395 transitions. Word has length 109 [2022-03-20 03:38:34,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:38:34,079 INFO L478 AbstractCegarLoop]: Abstraction has 347 states and 395 transitions. [2022-03-20 03:38:34,079 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.088235294117647) internal successors, (213), 99 states have internal predecessors, (213), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:38:34,079 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 395 transitions. [2022-03-20 03:38:34,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-03-20 03:38:34,082 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:38:34,082 INFO L499 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:38:34,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 03:38:34,306 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 [2022-03-20 03:38:34,306 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:38:34,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:38:34,307 INFO L85 PathProgramCache]: Analyzing trace with hash -527993268, now seen corresponding path program 6 times [2022-03-20 03:38:34,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:38:34,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552324718] [2022-03-20 03:38:34,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:38:34,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:38:34,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:37,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:38:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:38:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:37,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:38:37,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552324718] [2022-03-20 03:38:37,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552324718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:38:37,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157165222] [2022-03-20 03:38:37,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 03:38:37,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:38:37,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:38:37,300 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) [2022-03-20 03:38:37,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 03:38:37,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-03-20 03:38:37,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:38:37,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 98 conjunts are in the unsatisfiable core [2022-03-20 03:38:37,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:38:37,983 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:37,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:38:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:38:46,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157165222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:38:46,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:38:46,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 99, 99] total 198 [2022-03-20 03:38:46,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074758732] [2022-03-20 03:38:46,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:38:46,486 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 198 states [2022-03-20 03:38:46,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:38:46,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2022-03-20 03:38:46,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18540, Invalid=20466, Unknown=0, NotChecked=0, Total=39006 [2022-03-20 03:38:46,491 INFO L87 Difference]: Start difference. First operand 347 states and 395 transitions. Second operand has 198 states, 198 states have (on average 2.0454545454545454) internal successors, (405), 195 states have internal predecessors, (405), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:39:12,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:39:12,519 INFO L93 Difference]: Finished difference Result 5674 states and 5960 transitions. [2022-03-20 03:39:12,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2022-03-20 03:39:12,519 INFO L78 Accepts]: Start accepts. Automaton has has 198 states, 198 states have (on average 2.0454545454545454) internal successors, (405), 195 states have internal predecessors, (405), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2022-03-20 03:39:12,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:39:12,536 INFO L225 Difference]: With dead ends: 5674 [2022-03-20 03:39:12,536 INFO L226 Difference]: Without dead ends: 5480 [2022-03-20 03:39:12,546 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 702 GetRequests, 313 SyntacticMatches, 1 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24603 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=55224, Invalid=96486, Unknown=0, NotChecked=0, Total=151710 [2022-03-20 03:39:12,547 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 4316 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 2174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4316 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 3493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2174 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 03:39:12,547 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4316 Valid, 55 Invalid, 3493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2174 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 03:39:12,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5480 states. [2022-03-20 03:39:12,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5480 to 683. [2022-03-20 03:39:12,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 678 states have (on average 1.1430678466076696) internal successors, (775), 678 states have internal predecessors, (775), 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) [2022-03-20 03:39:12,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 779 transitions. [2022-03-20 03:39:12,586 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 779 transitions. Word has length 205 [2022-03-20 03:39:12,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:39:12,586 INFO L478 AbstractCegarLoop]: Abstraction has 683 states and 779 transitions. [2022-03-20 03:39:12,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 198 states, 198 states have (on average 2.0454545454545454) internal successors, (405), 195 states have internal predecessors, (405), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:39:12,587 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 779 transitions. [2022-03-20 03:39:12,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2022-03-20 03:39:12,596 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:39:12,597 INFO L499 BasicCegarLoop]: trace histogram [191, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:39:12,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 03:39:12,807 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 [2022-03-20 03:39:12,808 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:39:12,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:39:12,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1829454644, now seen corresponding path program 7 times [2022-03-20 03:39:12,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:39:12,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506272955] [2022-03-20 03:39:12,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:39:12,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:39:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:39:24,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:39:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:39:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 36290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:39:24,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:39:24,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506272955] [2022-03-20 03:39:24,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506272955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:39:24,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443618065] [2022-03-20 03:39:24,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 03:39:24,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:39:24,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:39:24,188 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) [2022-03-20 03:39:24,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 03:39:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:39:24,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 1577 conjuncts, 192 conjunts are in the unsatisfiable core [2022-03-20 03:39:24,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:39:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 36290 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:39:46,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 03:39:46,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443618065] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:39:46,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 03:39:46,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [193] imperfect sequences [196] total 387 [2022-03-20 03:39:46,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382037374] [2022-03-20 03:39:46,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:39:46,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-03-20 03:39:46,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:39:46,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-03-20 03:39:46,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37061, Invalid=112321, Unknown=0, NotChecked=0, Total=149382 [2022-03-20 03:39:46,803 INFO L87 Difference]: Start difference. First operand 683 states and 779 transitions. Second operand has 193 states, 193 states have (on average 2.0362694300518136) internal successors, (393), 193 states have internal predecessors, (393), 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) [2022-03-20 03:39:49,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:39:49,557 INFO L93 Difference]: Finished difference Result 27952 states and 28052 transitions. [2022-03-20 03:39:49,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-03-20 03:39:49,558 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.0362694300518136) internal successors, (393), 193 states have internal predecessors, (393), 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 397 [2022-03-20 03:39:49,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:39:49,567 INFO L225 Difference]: With dead ends: 27952 [2022-03-20 03:39:49,567 INFO L226 Difference]: Without dead ends: 1198 [2022-03-20 03:39:49,574 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 385 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36860 ImplicationChecksByTransitivity, 32.3s TimeCoverageRelationStatistics Valid=37061, Invalid=112321, Unknown=0, NotChecked=0, Total=149382 [2022-03-20 03:39:49,577 INFO L913 BasicCegarLoop]: 207 mSDtfsCounter, 539 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 03:39:49,577 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 1193 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 03:39:49,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2022-03-20 03:39:49,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1190. [2022-03-20 03:39:49,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1185 states have (on average 1.0075949367088608) internal successors, (1194), 1185 states have internal predecessors, (1194), 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) [2022-03-20 03:39:49,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1198 transitions. [2022-03-20 03:39:49,599 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1198 transitions. Word has length 397 [2022-03-20 03:39:49,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:39:49,599 INFO L478 AbstractCegarLoop]: Abstraction has 1190 states and 1198 transitions. [2022-03-20 03:39:49,599 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.0362694300518136) internal successors, (393), 193 states have internal predecessors, (393), 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) [2022-03-20 03:39:49,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1198 transitions. [2022-03-20 03:39:49,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2022-03-20 03:39:49,605 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:39:49,606 INFO L499 BasicCegarLoop]: trace histogram [100, 99, 92, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:39:49,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 03:39:49,819 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 [2022-03-20 03:39:49,820 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:39:49,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:39:49,820 INFO L85 PathProgramCache]: Analyzing trace with hash -856352636, now seen corresponding path program 1 times [2022-03-20 03:39:49,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:39:49,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388985856] [2022-03-20 03:39:49,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:39:49,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:39:49,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:40:01,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:40:01,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:40:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:40:01,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:40:01,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388985856] [2022-03-20 03:40:01,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388985856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:40:01,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322669517] [2022-03-20 03:40:01,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:40:01,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:40:01,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:40:01,172 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) [2022-03-20 03:40:01,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 03:40:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:40:01,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 1395 conjuncts, 194 conjunts are in the unsatisfiable core [2022-03-20 03:40:01,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:40:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:40:02,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:40:04,159 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:40:04,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322669517] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:40:04,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:40:04,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [196, 195, 195] total 208 [2022-03-20 03:40:04,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183414589] [2022-03-20 03:40:04,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:40:04,161 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 208 states [2022-03-20 03:40:04,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:40:04,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 208 interpolants. [2022-03-20 03:40:04,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20515, Invalid=22541, Unknown=0, NotChecked=0, Total=43056 [2022-03-20 03:40:04,168 INFO L87 Difference]: Start difference. First operand 1190 states and 1198 transitions. Second operand has 208 states, 208 states have (on average 2.1153846153846154) internal successors, (440), 205 states have internal predecessors, (440), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:40:25,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:40:25,951 INFO L93 Difference]: Finished difference Result 2339 states and 2474 transitions. [2022-03-20 03:40:25,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2022-03-20 03:40:25,951 INFO L78 Accepts]: Start accepts. Automaton has has 208 states, 208 states have (on average 2.1153846153846154) internal successors, (440), 205 states have internal predecessors, (440), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 397 [2022-03-20 03:40:25,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:40:25,952 INFO L225 Difference]: With dead ends: 2339 [2022-03-20 03:40:25,952 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 03:40:25,958 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1192 GetRequests, 782 SyntacticMatches, 2 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22518 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=61129, Invalid=106561, Unknown=0, NotChecked=0, Total=167690 [2022-03-20 03:40:25,958 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 1921 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 1334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1921 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1334 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:40:25,959 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1921 Valid, 68 Invalid, 2171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1334 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 03:40:25,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 03:40:25,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 03:40:25,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 03:40:25,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 03:40:25,960 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 397 [2022-03-20 03:40:25,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:40:25,960 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 03:40:25,960 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 208 states, 208 states have (on average 2.1153846153846154) internal successors, (440), 205 states have internal predecessors, (440), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:40:25,960 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 03:40:25,960 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 03:40:25,963 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 03:40:25,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 03:40:26,171 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 [2022-03-20 03:40:26,173 INFO L719 BasicCegarLoop]: Path program histogram: [7, 1, 1, 1] [2022-03-20 03:40:26,174 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 03:40:26,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 03:40:26 BasicIcfg [2022-03-20 03:40:26,178 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 03:40:26,178 INFO L158 Benchmark]: Toolchain (without parser) took 128784.16ms. Allocated memory was 189.8MB in the beginning and 882.9MB in the end (delta: 693.1MB). Free memory was 133.5MB in the beginning and 528.5MB in the end (delta: -395.1MB). Peak memory consumption was 297.7MB. Max. memory is 8.0GB. [2022-03-20 03:40:26,178 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 189.8MB. Free memory is still 150.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 03:40:26,179 INFO L158 Benchmark]: CACSL2BoogieTranslator took 272.74ms. Allocated memory was 189.8MB in the beginning and 239.1MB in the end (delta: 49.3MB). Free memory was 133.3MB in the beginning and 209.9MB in the end (delta: -76.6MB). Peak memory consumption was 8.6MB. Max. memory is 8.0GB. [2022-03-20 03:40:26,179 INFO L158 Benchmark]: Boogie Preprocessor took 30.08ms. Allocated memory is still 239.1MB. Free memory was 209.9MB in the beginning and 208.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 03:40:26,179 INFO L158 Benchmark]: RCFGBuilder took 219.34ms. Allocated memory is still 239.1MB. Free memory was 208.4MB in the beginning and 198.0MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 03:40:26,179 INFO L158 Benchmark]: IcfgTransformer took 49.79ms. Allocated memory is still 239.1MB. Free memory was 197.8MB in the beginning and 194.2MB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2022-03-20 03:40:26,180 INFO L158 Benchmark]: TraceAbstraction took 128205.48ms. Allocated memory was 239.1MB in the beginning and 882.9MB in the end (delta: 643.8MB). Free memory was 193.8MB in the beginning and 528.5MB in the end (delta: -334.7MB). Peak memory consumption was 310.1MB. Max. memory is 8.0GB. [2022-03-20 03:40:26,182 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from IcfgTransformer: - StatisticsResult: Jordan loop acceleration statistics 0 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 189.8MB. Free memory is still 150.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 272.74ms. Allocated memory was 189.8MB in the beginning and 239.1MB in the end (delta: 49.3MB). Free memory was 133.3MB in the beginning and 209.9MB in the end (delta: -76.6MB). Peak memory consumption was 8.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.08ms. Allocated memory is still 239.1MB. Free memory was 209.9MB in the beginning and 208.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 219.34ms. Allocated memory is still 239.1MB. Free memory was 208.4MB in the beginning and 198.0MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 49.79ms. Allocated memory is still 239.1MB. Free memory was 197.8MB in the beginning and 194.2MB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * TraceAbstraction took 128205.48ms. Allocated memory was 239.1MB in the beginning and 882.9MB in the end (delta: 643.8MB). Free memory was 193.8MB in the beginning and 528.5MB in the end (delta: -334.7MB). Peak memory consumption was 310.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 128.2s, OverallIterations: 10, TraceHistogramMax: 191, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 58.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9883 SdHoareTripleChecker+Valid, 5.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9882 mSDsluCounter, 1637 SdHoareTripleChecker+Invalid, 4.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1300 mSDsCounter, 4981 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4746 IncrementalHoareTripleChecker+Invalid, 9727 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4981 mSolverCounterUnsat, 337 mSDtfsCounter, 4746 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3302 GetRequests, 1713 SyntacticMatches, 8 SemanticMatches, 1581 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93085 ImplicationChecksByTransitivity, 88.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1190occurred in iteration=9, InterpolantAutomatonStates: 803, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 6516 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 65.6s InterpolantComputationTime, 2532 NumberOfCodeBlocks, 2532 NumberOfCodeBlocksAsserted, 170 NumberOfCheckSat, 3360 ConstructedInterpolants, 0 QuantifiedInterpolants, 9782 SizeOfPredicates, 7 NumberOfNonLiveVariables, 4730 ConjunctsInSsa, 587 ConjunctsInUnsatCore, 25 InterpolantComputations, 3 PerfectInterpolantSequences, 36290/162586 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-20 03:40:26,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...