/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-acceleration/array_4.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 03:33:22,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 03:33:22,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 03:33:22,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 03:33:22,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 03:33:22,578 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 03:33:22,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 03:33:22,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 03:33:22,589 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 03:33:22,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 03:33:22,594 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 03:33:22,594 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 03:33:22,594 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 03:33:22,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 03:33:22,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 03:33:22,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 03:33:22,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 03:33:22,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 03:33:22,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 03:33:22,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 03:33:22,599 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 03:33:22,601 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 03:33:22,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 03:33:22,603 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 03:33:22,603 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 03:33:22,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 03:33:22,605 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 03:33:22,605 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 03:33:22,605 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 03:33:22,606 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 03:33:22,606 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 03:33:22,606 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 03:33:22,607 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 03:33:22,607 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 03:33:22,608 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 03:33:22,608 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 03:33:22,608 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 03:33:22,609 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 03:33:22,609 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 03:33:22,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 03:33:22,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 03:33:22,615 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 03:33:22,615 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 03:33:22,627 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 03:33:22,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 03:33:22,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 03:33:22,629 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 03:33:22,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 03:33:22,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 03:33:22,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 03:33:22,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 03:33:22,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 03:33:22,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 03:33:22,630 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 03:33:22,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 03:33:22,630 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 03:33:22,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 03:33:22,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 03:33:22,630 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 03:33:22,631 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 03:33:22,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 03:33:22,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 03:33:22,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 03:33:22,631 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 03:33:22,632 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 03:33:22,632 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 03:33:22,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 03:33:22,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 03:33:22,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 03:33:22,870 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 03:33:22,870 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 03:33:22,871 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_4.i [2022-03-20 03:33:22,914 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fcc64d8d/e8692a9ca929430cb04488fc476f5d05/FLAG586fcf8e2 [2022-03-20 03:33:23,274 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 03:33:23,274 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_4.i [2022-03-20 03:33:23,280 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fcc64d8d/e8692a9ca929430cb04488fc476f5d05/FLAG586fcf8e2 [2022-03-20 03:33:23,290 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fcc64d8d/e8692a9ca929430cb04488fc476f5d05 [2022-03-20 03:33:23,292 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 03:33:23,292 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 03:33:23,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 03:33:23,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 03:33:23,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 03:33:23,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:33:23" (1/1) ... [2022-03-20 03:33:23,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f79034f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:33:23, skipping insertion in model container [2022-03-20 03:33:23,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:33:23" (1/1) ... [2022-03-20 03:33:23,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 03:33:23,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 03:33:23,445 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-acceleration/array_4.i[848,861] [2022-03-20 03:33:23,455 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 03:33:23,460 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 03:33:23,492 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-acceleration/array_4.i[848,861] [2022-03-20 03:33:23,498 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 03:33:23,509 INFO L208 MainTranslator]: Completed translation [2022-03-20 03:33:23,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:33:23 WrapperNode [2022-03-20 03:33:23,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 03:33:23,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 03:33:23,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 03:33:23,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 03:33:23,519 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:33:23" (1/1) ... [2022-03-20 03:33:23,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:33:23" (1/1) ... [2022-03-20 03:33:23,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:33:23" (1/1) ... [2022-03-20 03:33:23,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:33:23" (1/1) ... [2022-03-20 03:33:23,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:33:23" (1/1) ... [2022-03-20 03:33:23,540 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:33:23" (1/1) ... [2022-03-20 03:33:23,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:33:23" (1/1) ... [2022-03-20 03:33:23,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 03:33:23,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 03:33:23,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 03:33:23,548 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 03:33:23,549 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:33:23" (1/1) ... [2022-03-20 03:33:23,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 03:33:23,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:33:23,575 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 03:33:23,592 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 03:33:23,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 03:33:23,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 03:33:23,604 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 03:33:23,604 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 03:33:23,605 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 03:33:23,605 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 03:33:23,605 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 03:33:23,605 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 03:33:23,606 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 03:33:23,606 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 03:33:23,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 03:33:23,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 03:33:23,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 03:33:23,606 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 03:33:23,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 03:33:23,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 03:33:23,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 03:33:23,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 03:33:23,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 03:33:23,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 03:33:23,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 03:33:23,673 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 03:33:23,674 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 03:33:23,846 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 03:33:23,857 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 03:33:23,857 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 03:33:23,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:33:23 BoogieIcfgContainer [2022-03-20 03:33:23,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 03:33:23,859 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 03:33:23,859 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 03:33:23,861 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 03:33:23,863 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:33:23" (1/1) ... [2022-03-20 03:33:23,864 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 03:33:23,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 03:33:23 BasicIcfg [2022-03-20 03:33:23,873 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 03:33:23,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 03:33:23,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 03:33:23,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 03:33:23,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 03:33:23" (1/4) ... [2022-03-20 03:33:23,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b96b7f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:33:23, skipping insertion in model container [2022-03-20 03:33:23,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:33:23" (2/4) ... [2022-03-20 03:33:23,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b96b7f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:33:23, skipping insertion in model container [2022-03-20 03:33:23,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:33:23" (3/4) ... [2022-03-20 03:33:23,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b96b7f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 03:33:23, skipping insertion in model container [2022-03-20 03:33:23,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 03:33:23" (4/4) ... [2022-03-20 03:33:23,880 INFO L111 eAbstractionObserver]: Analyzing ICFG array_4.iJordan [2022-03-20 03:33:23,886 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 03:33:23,887 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 03:33:23,927 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 03:33:23,936 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 03:33:23,937 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 03:33:23,946 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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 03:33:23,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-20 03:33:23,958 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:33:23,958 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:33:23,958 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:33:23,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:33:23,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1408461327, now seen corresponding path program 1 times [2022-03-20 03:33:23,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:33:23,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90428799] [2022-03-20 03:33:23,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:33:23,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:33:24,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:24,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:33:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:24,124 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 03:33:24,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:33:24,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90428799] [2022-03-20 03:33:24,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90428799] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:33:24,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:33:24,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 03:33:24,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22761333] [2022-03-20 03:33:24,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:33:24,132 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 03:33:24,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:33:24,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 03:33:24,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 03:33:24,156 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 03:33:24,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:33:24,187 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2022-03-20 03:33:24,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 03:33:24,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 13 [2022-03-20 03:33:24,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:33:24,193 INFO L225 Difference]: With dead ends: 24 [2022-03-20 03:33:24,193 INFO L226 Difference]: Without dead ends: 17 [2022-03-20 03:33:24,194 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 03:33:24,197 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 27 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 03:33:24,197 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 27 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:33:24,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-20 03:33:24,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-20 03:33:24,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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 03:33:24,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-03-20 03:33:24,219 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2022-03-20 03:33:24,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:33:24,219 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-03-20 03:33:24,219 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 03:33:24,220 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-03-20 03:33:24,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 03:33:24,220 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:33:24,220 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:33:24,221 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 03:33:24,221 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:33:24,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:33:24,224 INFO L85 PathProgramCache]: Analyzing trace with hash 999614691, now seen corresponding path program 1 times [2022-03-20 03:33:24,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:33:24,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959984967] [2022-03-20 03:33:24,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:33:24,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:33:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:24,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:33:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:24,291 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 03:33:24,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:33:24,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959984967] [2022-03-20 03:33:24,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959984967] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:33:24,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:33:24,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 03:33:24,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046161861] [2022-03-20 03:33:24,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:33:24,293 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 03:33:24,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:33:24,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 03:33:24,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 03:33:24,294 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:24,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:33:24,335 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2022-03-20 03:33:24,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 03:33:24,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-20 03:33:24,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:33:24,338 INFO L225 Difference]: With dead ends: 23 [2022-03-20 03:33:24,338 INFO L226 Difference]: Without dead ends: 23 [2022-03-20 03:33:24,338 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 03:33:24,341 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:33:24,342 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 21 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:33:24,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-20 03:33:24,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2022-03-20 03:33:24,345 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 03:33:24,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-03-20 03:33:24,346 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2022-03-20 03:33:24,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:33:24,346 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-03-20 03:33:24,346 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:24,346 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-03-20 03:33:24,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-20 03:33:24,347 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:33:24,347 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:33:24,347 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 03:33:24,347 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:33:24,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:33:24,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1202562811, now seen corresponding path program 1 times [2022-03-20 03:33:24,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:33:24,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051123861] [2022-03-20 03:33:24,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:33:24,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:33:24,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:24,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:33:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:24,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:33:24,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:33:24,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051123861] [2022-03-20 03:33:24,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051123861] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:33:24,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182545941] [2022-03-20 03:33:24,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:33:24,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:33:24,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:33:24,409 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 03:33:24,409 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 03:33:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:24,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 03:33:24,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:33:24,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:33:24,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:33:24,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:33:24,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182545941] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:33:24,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:33:24,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-20 03:33:24,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092794485] [2022-03-20 03:33:24,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:33:24,641 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 03:33:24,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:33:24,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 03:33:24,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-20 03:33:24,642 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:24,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:33:24,747 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-03-20 03:33:24,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 03:33:24,747 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-03-20 03:33:24,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:33:24,749 INFO L225 Difference]: With dead ends: 40 [2022-03-20 03:33:24,749 INFO L226 Difference]: Without dead ends: 40 [2022-03-20 03:33:24,751 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-20 03:33:24,753 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 46 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:33:24,754 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 31 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:33:24,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-20 03:33:24,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2022-03-20 03:33:24,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 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 03:33:24,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-03-20 03:33:24,759 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 16 [2022-03-20 03:33:24,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:33:24,760 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-03-20 03:33:24,761 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:24,761 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-03-20 03:33:24,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 03:33:24,762 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:33:24,762 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:33:24,782 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 03:33:24,975 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 03:33:24,976 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:33:24,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:33:24,976 INFO L85 PathProgramCache]: Analyzing trace with hash -111794581, now seen corresponding path program 2 times [2022-03-20 03:33:24,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:33:24,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121909234] [2022-03-20 03:33:24,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:33:24,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:33:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:25,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:33:25,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:25,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 03:33:25,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:33:25,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121909234] [2022-03-20 03:33:25,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121909234] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:33:25,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:33:25,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 03:33:25,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416382223] [2022-03-20 03:33:25,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:33:25,066 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 03:33:25,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:33:25,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 03:33:25,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 03:33:25,069 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 03:33:25,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:33:25,128 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2022-03-20 03:33:25,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 03:33:25,128 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 22 [2022-03-20 03:33:25,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:33:25,130 INFO L225 Difference]: With dead ends: 30 [2022-03-20 03:33:25,130 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 03:33:25,131 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-20 03:33:25,136 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:33:25,138 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 30 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:33:25,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 03:33:25,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-20 03:33:25,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 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 03:33:25,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-03-20 03:33:25,142 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2022-03-20 03:33:25,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:33:25,143 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-03-20 03:33:25,143 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 03:33:25,143 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-03-20 03:33:25,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 03:33:25,144 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:33:25,144 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:33:25,144 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 03:33:25,145 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:33:25,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:33:25,145 INFO L85 PathProgramCache]: Analyzing trace with hash 550607117, now seen corresponding path program 1 times [2022-03-20 03:33:25,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:33:25,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752067244] [2022-03-20 03:33:25,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:33:25,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:33:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:25,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:33:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 03:33:25,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:33:25,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752067244] [2022-03-20 03:33:25,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752067244] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:33:25,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304202629] [2022-03-20 03:33:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:33:25,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:33:25,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:33:25,254 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 03:33:25,257 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 03:33:25,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:25,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 03:33:25,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:33:25,400 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 03:33:25,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:33:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 03:33:25,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304202629] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:33:25,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:33:25,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-03-20 03:33:25,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492295446] [2022-03-20 03:33:25,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:33:25,509 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 03:33:25,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:33:25,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 03:33:25,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-03-20 03:33:25,510 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:25,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:33:25,740 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2022-03-20 03:33:25,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 03:33:25,740 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 4 states have call predecessors, (5), 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 03:33:25,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:33:25,741 INFO L225 Difference]: With dead ends: 77 [2022-03-20 03:33:25,741 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 03:33:25,741 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2022-03-20 03:33:25,742 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 153 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:33:25,742 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 35 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:33:25,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 03:33:25,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-03-20 03:33:25,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 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 03:33:25,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-03-20 03:33:25,746 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 25 [2022-03-20 03:33:25,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:33:25,746 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-03-20 03:33:25,747 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:25,747 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-03-20 03:33:25,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 03:33:25,748 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:33:25,748 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:33:25,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 03:33:25,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:33:25,967 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:33:25,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:33:25,968 INFO L85 PathProgramCache]: Analyzing trace with hash 187678327, now seen corresponding path program 2 times [2022-03-20 03:33:25,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:33:25,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607350700] [2022-03-20 03:33:25,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:33:25,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:33:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:26,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:33:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:26,113 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-03-20 03:33:26,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:33:26,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607350700] [2022-03-20 03:33:26,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607350700] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:33:26,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517438371] [2022-03-20 03:33:26,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 03:33:26,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:33:26,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:33:26,116 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 03:33:26,117 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 03:33:26,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 03:33:26,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:33:26,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 03:33:26,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:33:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-03-20 03:33:26,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:33:26,520 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-03-20 03:33:26,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517438371] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:33:26,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:33:26,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-20 03:33:26,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071506661] [2022-03-20 03:33:26,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:33:26,521 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 03:33:26,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:33:26,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 03:33:26,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-20 03:33:26,522 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:26,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:33:26,947 INFO L93 Difference]: Finished difference Result 138 states and 151 transitions. [2022-03-20 03:33:26,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 03:33:26,947 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-03-20 03:33:26,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:33:26,948 INFO L225 Difference]: With dead ends: 138 [2022-03-20 03:33:26,948 INFO L226 Difference]: Without dead ends: 138 [2022-03-20 03:33:26,949 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 03:33:26,950 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 250 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 03:33:26,950 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 36 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 03:33:26,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-03-20 03:33:26,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 89. [2022-03-20 03:33:26,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 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 03:33:26,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-03-20 03:33:26,955 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 64 [2022-03-20 03:33:26,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:33:26,955 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-03-20 03:33:26,956 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:26,956 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-03-20 03:33:26,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-20 03:33:26,956 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:33:26,956 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:33:26,976 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 03:33:27,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:33:27,172 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:33:27,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:33:27,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1370027761, now seen corresponding path program 3 times [2022-03-20 03:33:27,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:33:27,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068992461] [2022-03-20 03:33:27,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:33:27,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:33:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:27,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:33:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-03-20 03:33:27,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:33:27,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068992461] [2022-03-20 03:33:27,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068992461] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:33:27,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137655358] [2022-03-20 03:33:27,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 03:33:27,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:33:27,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:33:27,500 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 03:33:27,501 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 03:33:27,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-20 03:33:27,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:33:27,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 03:33:27,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:33:27,763 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-20 03:33:27,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:33:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-20 03:33:28,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137655358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:33:28,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:33:28,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 15, 15] total 40 [2022-03-20 03:33:28,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151502261] [2022-03-20 03:33:28,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:33:28,110 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 03:33:28,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:33:28,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 03:33:28,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 03:33:28,111 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 40 states, 40 states have (on average 3.225) internal successors, (129), 38 states have internal predecessors, (129), 4 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 03:33:28,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:33:28,971 INFO L93 Difference]: Finished difference Result 208 states and 232 transitions. [2022-03-20 03:33:28,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 03:33:28,972 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.225) internal successors, (129), 38 states have internal predecessors, (129), 4 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 88 [2022-03-20 03:33:28,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:33:28,972 INFO L225 Difference]: With dead ends: 208 [2022-03-20 03:33:28,973 INFO L226 Difference]: Without dead ends: 182 [2022-03-20 03:33:28,974 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1941, Invalid=3759, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 03:33:28,975 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 456 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 03:33:28,975 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 44 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 03:33:28,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-20 03:33:29,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2022-03-20 03:33:29,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0113636363636365) internal successors, (178), 176 states have internal predecessors, (178), 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 03:33:29,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2022-03-20 03:33:29,006 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 88 [2022-03-20 03:33:29,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:33:29,006 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2022-03-20 03:33:29,007 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.225) internal successors, (129), 38 states have internal predecessors, (129), 4 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 03:33:29,007 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2022-03-20 03:33:29,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-03-20 03:33:29,008 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:33:29,008 INFO L499 BasicCegarLoop]: trace histogram [35, 34, 34, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:33:29,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 03:33:29,208 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:33:29,209 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:33:29,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:33:29,209 INFO L85 PathProgramCache]: Analyzing trace with hash 804363235, now seen corresponding path program 4 times [2022-03-20 03:33:29,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:33:29,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208941711] [2022-03-20 03:33:29,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:33:29,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:33:29,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:29,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:33:29,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:29,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2022-03-20 03:33:29,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:33:29,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208941711] [2022-03-20 03:33:29,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208941711] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:33:29,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415049518] [2022-03-20 03:33:29,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 03:33:29,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:33:29,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:33:29,720 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 03:33:29,721 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 03:33:29,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 03:33:29,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:33:29,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 03:33:29,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:33:30,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2022-03-20 03:33:30,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:33:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2022-03-20 03:33:31,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415049518] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:33:31,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:33:31,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-03-20 03:33:31,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211335156] [2022-03-20 03:33:31,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:33:31,248 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-20 03:33:31,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:33:31,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-20 03:33:31,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 03:33:31,251 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:33,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:33:33,284 INFO L93 Difference]: Finished difference Result 378 states and 411 transitions. [2022-03-20 03:33:33,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-20 03:33:33,285 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 180 [2022-03-20 03:33:33,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:33:33,286 INFO L225 Difference]: With dead ends: 378 [2022-03-20 03:33:33,286 INFO L226 Difference]: Without dead ends: 378 [2022-03-20 03:33:33,289 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2022-03-20 03:33:33,290 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 930 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 03:33:33,290 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [930 Valid, 26 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 03:33:33,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-03-20 03:33:33,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 249. [2022-03-20 03:33:33,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.0081967213114753) internal successors, (246), 244 states have internal predecessors, (246), 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 03:33:33,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2022-03-20 03:33:33,299 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 180 [2022-03-20 03:33:33,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:33:33,299 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2022-03-20 03:33:33,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:33:33,299 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2022-03-20 03:33:33,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-03-20 03:33:33,301 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:33:33,301 INFO L499 BasicCegarLoop]: trace histogram [66, 66, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:33:33,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-20 03:33:33,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:33:33,519 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:33:33,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:33:33,521 INFO L85 PathProgramCache]: Analyzing trace with hash -820476697, now seen corresponding path program 5 times [2022-03-20 03:33:33,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:33:33,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523212196] [2022-03-20 03:33:33,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:33:33,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:33:33,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:35,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:33:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:33:35,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6107 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2022-03-20 03:33:35,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:33:35,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523212196] [2022-03-20 03:33:35,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523212196] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:33:35,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852560626] [2022-03-20 03:33:35,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 03:33:35,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:33:35,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:33:35,028 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 03:33:35,029 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 03:35:53,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2022-03-20 03:35:53,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:35:53,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 03:35:53,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:35:53,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6107 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2022-03-20 03:35:53,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:35:57,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6107 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2022-03-20 03:35:57,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852560626] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:35:57,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:35:57,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 138 [2022-03-20 03:35:57,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619265481] [2022-03-20 03:35:57,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:35:57,911 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-03-20 03:35:57,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:35:57,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-03-20 03:35:57,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-03-20 03:35:57,918 INFO L87 Difference]: Start difference. First operand 249 states and 250 transitions. Second operand has 138 states, 138 states have (on average 2.0434782608695654) internal successors, (282), 137 states have internal predecessors, (282), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:36:06,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:36:06,876 INFO L93 Difference]: Finished difference Result 786 states and 887 transitions. [2022-03-20 03:36:06,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-03-20 03:36:06,877 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.0434782608695654) internal successors, (282), 137 states have internal predecessors, (282), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 248 [2022-03-20 03:36:06,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:36:06,881 INFO L225 Difference]: With dead ends: 786 [2022-03-20 03:36:06,881 INFO L226 Difference]: Without dead ends: 786 [2022-03-20 03:36:06,887 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11518 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=27677, Invalid=46035, Unknown=0, NotChecked=0, Total=73712 [2022-03-20 03:36:06,889 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1978 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 927 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1978 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 927 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:36:06,890 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1978 Valid, 61 Invalid, 1753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [927 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 03:36:06,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2022-03-20 03:36:06,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 385. [2022-03-20 03:36:06,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 380 states have (on average 1.0052631578947369) internal successors, (382), 380 states have internal predecessors, (382), 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 03:36:06,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 386 transitions. [2022-03-20 03:36:06,914 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 386 transitions. Word has length 248 [2022-03-20 03:36:06,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:36:06,915 INFO L478 AbstractCegarLoop]: Abstraction has 385 states and 386 transitions. [2022-03-20 03:36:06,916 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.0434782608695654) internal successors, (282), 137 states have internal predecessors, (282), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:36:06,916 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 386 transitions. [2022-03-20 03:36:06,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2022-03-20 03:36:06,919 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:36:06,919 INFO L499 BasicCegarLoop]: trace histogram [134, 134, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:36:06,976 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 03:36:07,128 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:36:07,128 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:36:07,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:36:07,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1626566417, now seen corresponding path program 6 times [2022-03-20 03:36:07,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:36:07,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535224216] [2022-03-20 03:36:07,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:36:07,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:36:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:36:12,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:36:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:36:12,590 INFO L134 CoverageAnalysis]: Checked inductivity of 19707 backedges. 0 proven. 17956 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2022-03-20 03:36:12,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:36:12,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535224216] [2022-03-20 03:36:12,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535224216] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:36:12,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049539292] [2022-03-20 03:36:12,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 03:36:12,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:36:12,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:36:12,592 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 03:36:12,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process