/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 08:17:17,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 08:17:17,909 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 08:17:17,937 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 08:17:17,937 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 08:17:17,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 08:17:17,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 08:17:17,947 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 08:17:17,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 08:17:17,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 08:17:17,953 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 08:17:17,954 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 08:17:17,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 08:17:17,956 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 08:17:17,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 08:17:17,959 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 08:17:17,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 08:17:17,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 08:17:17,963 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 08:17:17,967 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 08:17:17,968 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 08:17:17,969 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 08:17:17,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 08:17:17,970 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 08:17:17,971 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 08:17:17,976 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 08:17:17,982 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 08:17:17,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 08:17:17,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 08:17:17,984 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 08:17:18,005 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 08:17:18,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 08:17:18,007 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 08:17:18,008 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 08:17:18,009 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 08:17:18,009 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 08:17:18,009 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 08:17:18,009 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 08:17:18,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 08:17:18,010 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 08:17:18,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 08:17:18,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 08:17:18,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 08:17:18,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 08:17:18,010 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 08:17:18,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 08:17:18,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 08:17:18,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 08:17:18,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 08:17:18,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:17:18,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 08:17:18,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 08:17:18,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 08:17:18,012 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 08:17:18,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 08:17:18,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 08:17:18,012 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 08:17:18,012 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 08:17:18,013 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 08:17:18,013 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 08:17:18,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 08:17:18,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 08:17:18,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 08:17:18,255 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 08:17:18,255 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 08:17:18,256 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-2.i [2022-03-20 08:17:18,319 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f151ba53c/246e888e9e8f445989b2ccb8688078ee/FLAG67b55bba3 [2022-03-20 08:17:18,671 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 08:17:18,671 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-2.i [2022-03-20 08:17:18,676 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f151ba53c/246e888e9e8f445989b2ccb8688078ee/FLAG67b55bba3 [2022-03-20 08:17:19,103 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f151ba53c/246e888e9e8f445989b2ccb8688078ee [2022-03-20 08:17:19,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 08:17:19,106 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 08:17:19,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 08:17:19,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 08:17:19,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 08:17:19,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:17:19" (1/1) ... [2022-03-20 08:17:19,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dab83d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:19, skipping insertion in model container [2022-03-20 08:17:19,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:17:19" (1/1) ... [2022-03-20 08:17:19,115 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 08:17:19,123 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 08:17:19,263 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_3-2.i[809,822] [2022-03-20 08:17:19,275 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:17:19,280 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 08:17:19,288 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_3-2.i[809,822] [2022-03-20 08:17:19,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:17:19,300 INFO L208 MainTranslator]: Completed translation [2022-03-20 08:17:19,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:19 WrapperNode [2022-03-20 08:17:19,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 08:17:19,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 08:17:19,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 08:17:19,302 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 08:17:19,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:19" (1/1) ... [2022-03-20 08:17:19,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:19" (1/1) ... [2022-03-20 08:17:19,313 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:19" (1/1) ... [2022-03-20 08:17:19,313 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:19" (1/1) ... [2022-03-20 08:17:19,316 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:19" (1/1) ... [2022-03-20 08:17:19,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:19" (1/1) ... [2022-03-20 08:17:19,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:19" (1/1) ... [2022-03-20 08:17:19,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 08:17:19,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 08:17:19,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 08:17:19,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 08:17:19,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:19" (1/1) ... [2022-03-20 08:17:19,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:17:19,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:17:19,358 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 08:17:19,376 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 08:17:19,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 08:17:19,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 08:17:19,389 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 08:17:19,389 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 08:17:19,390 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 08:17:19,390 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 08:17:19,390 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 08:17:19,390 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 08:17:19,391 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 08:17:19,391 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 08:17:19,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 08:17:19,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 08:17:19,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 08:17:19,391 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 08:17:19,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 08:17:19,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 08:17:19,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 08:17:19,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 08:17:19,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 08:17:19,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 08:17:19,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 08:17:19,457 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 08:17:19,458 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 08:17:19,549 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 08:17:19,553 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 08:17:19,553 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 08:17:19,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:17:19 BoogieIcfgContainer [2022-03-20 08:17:19,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 08:17:19,555 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 08:17:19,556 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 08:17:19,556 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 08:17:19,558 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:17:19" (1/1) ... [2022-03-20 08:17:19,560 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 08:17:19,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:17:19 BasicIcfg [2022-03-20 08:17:19,570 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 08:17:19,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 08:17:19,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 08:17:19,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 08:17:19,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:17:19" (1/4) ... [2022-03-20 08:17:19,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e975d62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:17:19, skipping insertion in model container [2022-03-20 08:17:19,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:19" (2/4) ... [2022-03-20 08:17:19,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e975d62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:17:19, skipping insertion in model container [2022-03-20 08:17:19,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:17:19" (3/4) ... [2022-03-20 08:17:19,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e975d62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:17:19, skipping insertion in model container [2022-03-20 08:17:19,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:17:19" (4/4) ... [2022-03-20 08:17:19,588 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-2.iqvasr [2022-03-20 08:17:19,592 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 08:17:19,592 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 08:17:19,621 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 08:17:19,626 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 08:17:19,626 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 08:17:19,638 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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 08:17:19,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-20 08:17:19,641 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:17:19,642 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:17:19,642 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:17:19,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:17:19,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1043605578, now seen corresponding path program 1 times [2022-03-20 08:17:19,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:17:19,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094624077] [2022-03-20 08:17:19,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:19,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:17:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:19,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:17:19,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:19,806 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 08:17:19,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:17:19,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094624077] [2022-03-20 08:17:19,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094624077] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:17:19,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:17:19,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 08:17:19,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277126107] [2022-03-20 08:17:19,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:17:19,812 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 08:17:19,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:17:19,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 08:17:19,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:17:19,837 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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 08:17:19,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:17:19,884 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-03-20 08:17:19,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 08:17:19,887 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 08:17:19,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:17:19,891 INFO L225 Difference]: With dead ends: 42 [2022-03-20 08:17:19,891 INFO L226 Difference]: Without dead ends: 18 [2022-03-20 08:17:19,893 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 08:17:19,897 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 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 08:17:19,898 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:17:19,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-20 08:17:19,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-03-20 08:17:19,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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 08:17:19,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-03-20 08:17:19,937 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2022-03-20 08:17:19,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:17:19,937 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-03-20 08:17:19,938 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 08:17:19,938 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-03-20 08:17:19,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 08:17:19,939 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:17:19,939 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:17:19,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 08:17:19,940 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:17:19,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:17:19,945 INFO L85 PathProgramCache]: Analyzing trace with hash -637810695, now seen corresponding path program 1 times [2022-03-20 08:17:19,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:17:19,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666837252] [2022-03-20 08:17:19,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:19,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:17:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:20,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:17:20,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:20,025 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 08:17:20,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:17:20,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666837252] [2022-03-20 08:17:20,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666837252] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:17:20,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:17:20,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 08:17:20,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812360232] [2022-03-20 08:17:20,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:17:20,026 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 08:17:20,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:17:20,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 08:17:20,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 08:17:20,027 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:20,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:17:20,071 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-03-20 08:17:20,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 08:17:20,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-20 08:17:20,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:17:20,073 INFO L225 Difference]: With dead ends: 35 [2022-03-20 08:17:20,073 INFO L226 Difference]: Without dead ends: 25 [2022-03-20 08:17:20,074 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 08:17:20,074 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:17:20,076 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 22 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:17:20,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-20 08:17:20,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2022-03-20 08:17:20,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:20,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-03-20 08:17:20,091 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2022-03-20 08:17:20,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:17:20,092 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-03-20 08:17:20,092 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:20,092 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-03-20 08:17:20,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 08:17:20,092 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:17:20,092 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:17:20,093 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 08:17:20,093 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:17:20,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:17:20,093 INFO L85 PathProgramCache]: Analyzing trace with hash -693433385, now seen corresponding path program 1 times [2022-03-20 08:17:20,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:17:20,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686816574] [2022-03-20 08:17:20,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:20,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:17:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:20,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:17:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:20,181 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 08:17:20,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:17:20,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686816574] [2022-03-20 08:17:20,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686816574] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:17:20,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827590467] [2022-03-20 08:17:20,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:20,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:17:20,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:17:20,192 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 08:17:20,193 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 08:17:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:20,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 08:17:20,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:17:20,295 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 08:17:20,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:17:20,367 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 08:17:20,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827590467] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:17:20,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:17:20,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-20 08:17:20,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704442858] [2022-03-20 08:17:20,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:17:20,368 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 08:17:20,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:17:20,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 08:17:20,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-20 08:17:20,369 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 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 08:17:20,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:17:20,481 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2022-03-20 08:17:20,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 08:17:20,482 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 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 17 [2022-03-20 08:17:20,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:17:20,485 INFO L225 Difference]: With dead ends: 55 [2022-03-20 08:17:20,485 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 08:17:20,486 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 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 08:17:20,488 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 71 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:17:20,490 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 32 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:17:20,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 08:17:20,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 25. [2022-03-20 08:17:20,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 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 08:17:20,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-03-20 08:17:20,502 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2022-03-20 08:17:20,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:17:20,503 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-03-20 08:17:20,503 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 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 08:17:20,503 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-03-20 08:17:20,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 08:17:20,503 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:17:20,504 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:17:20,538 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 08:17:20,719 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 08:17:20,720 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:17:20,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:17:20,720 INFO L85 PathProgramCache]: Analyzing trace with hash -859874703, now seen corresponding path program 2 times [2022-03-20 08:17:20,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:17:20,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133046452] [2022-03-20 08:17:20,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:20,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:17:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:20,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:17:20,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:20,779 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 08:17:20,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:17:20,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133046452] [2022-03-20 08:17:20,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133046452] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:17:20,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:17:20,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 08:17:20,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102402841] [2022-03-20 08:17:20,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:17:20,780 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 08:17:20,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:17:20,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 08:17:20,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 08:17:20,781 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:20,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:17:20,848 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-03-20 08:17:20,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 08:17:20,848 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-20 08:17:20,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:17:20,849 INFO L225 Difference]: With dead ends: 34 [2022-03-20 08:17:20,849 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 08:17:20,849 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 08:17:20,850 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:17:20,850 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 31 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:17:20,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 08:17:20,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-03-20 08:17:20,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 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 08:17:20,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-03-20 08:17:20,854 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2022-03-20 08:17:20,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:17:20,855 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-03-20 08:17:20,855 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:20,855 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-03-20 08:17:20,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 08:17:20,855 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:17:20,855 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:17:20,855 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 08:17:20,856 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:17:20,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:17:20,856 INFO L85 PathProgramCache]: Analyzing trace with hash 881682956, now seen corresponding path program 1 times [2022-03-20 08:17:20,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:17:20,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282563946] [2022-03-20 08:17:20,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:20,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:17:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:20,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:17:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 08:17:20,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:17:20,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282563946] [2022-03-20 08:17:20,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282563946] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:17:20,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671703472] [2022-03-20 08:17:20,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:20,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:17:20,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:17:20,951 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 08:17:20,957 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 08:17:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:21,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 08:17:21,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:17:21,097 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 08:17:21,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:17:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 08:17:21,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671703472] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:17:21,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:17:21,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-03-20 08:17:21,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697585163] [2022-03-20 08:17:21,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:17:21,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 08:17:21,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:17:21,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 08:17:21,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-03-20 08:17:21,207 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 14 states have internal predecessors, (46), 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 08:17:21,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:17:21,461 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2022-03-20 08:17:21,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 08:17:21,462 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 14 states have internal predecessors, (46), 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 27 [2022-03-20 08:17:21,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:17:21,464 INFO L225 Difference]: With dead ends: 101 [2022-03-20 08:17:21,464 INFO L226 Difference]: Without dead ends: 82 [2022-03-20 08:17:21,465 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 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 08:17:21,466 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 180 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:17:21,466 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 41 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:17:21,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-20 08:17:21,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 56. [2022-03-20 08:17:21,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 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 08:17:21,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2022-03-20 08:17:21,483 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 27 [2022-03-20 08:17:21,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:17:21,484 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2022-03-20 08:17:21,485 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 14 states have internal predecessors, (46), 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 08:17:21,485 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2022-03-20 08:17:21,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 08:17:21,487 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:17:21,488 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:17:21,505 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 08:17:21,703 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 08:17:21,704 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:17:21,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:17:21,704 INFO L85 PathProgramCache]: Analyzing trace with hash 2068232748, now seen corresponding path program 2 times [2022-03-20 08:17:21,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:17:21,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810668864] [2022-03-20 08:17:21,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:21,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:17:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:21,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:17:21,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-03-20 08:17:21,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:17:21,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810668864] [2022-03-20 08:17:21,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810668864] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:17:21,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016937519] [2022-03-20 08:17:21,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:17:21,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:17:21,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:17:21,840 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 08:17:21,841 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 08:17:21,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:17:21,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:17:21,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 08:17:21,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:17:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-03-20 08:17:21,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:17:22,184 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-03-20 08:17:22,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016937519] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:17:22,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:17:22,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-20 08:17:22,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832315328] [2022-03-20 08:17:22,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:17:22,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 08:17:22,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:17:22,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 08:17:22,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-20 08:17:22,188 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 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 08:17:22,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:17:22,703 INFO L93 Difference]: Finished difference Result 195 states and 254 transitions. [2022-03-20 08:17:22,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 08:17:22,703 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 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 55 [2022-03-20 08:17:22,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:17:22,706 INFO L225 Difference]: With dead ends: 195 [2022-03-20 08:17:22,706 INFO L226 Difference]: Without dead ends: 166 [2022-03-20 08:17:22,707 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 100 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 08:17:22,708 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 422 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:17:22,710 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 42 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 08:17:22,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-03-20 08:17:22,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 80. [2022-03-20 08:17:22,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 75 states have internal predecessors, (83), 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 08:17:22,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2022-03-20 08:17:22,734 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 55 [2022-03-20 08:17:22,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:17:22,735 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2022-03-20 08:17:22,735 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 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 08:17:22,735 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2022-03-20 08:17:22,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 08:17:22,736 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:17:22,736 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:17:22,769 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 08:17:22,951 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 08:17:22,952 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:17:22,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:17:22,952 INFO L85 PathProgramCache]: Analyzing trace with hash -838467180, now seen corresponding path program 3 times [2022-03-20 08:17:22,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:17:22,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475815442] [2022-03-20 08:17:22,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:22,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:17:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:23,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:17:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:23,243 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-03-20 08:17:23,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:17:23,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475815442] [2022-03-20 08:17:23,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475815442] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:17:23,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858539841] [2022-03-20 08:17:23,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 08:17:23,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:17:23,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:17:23,267 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 08:17:23,275 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 08:17:23,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-20 08:17:23,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:17:23,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 08:17:23,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:17:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-20 08:17:23,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:17:23,649 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-20 08:17:23,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858539841] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:17:23,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:17:23,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10, 10] total 35 [2022-03-20 08:17:23,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305229769] [2022-03-20 08:17:23,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:17:23,652 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 08:17:23,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:17:23,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 08:17:23,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 08:17:23,653 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 35 states, 35 states have (on average 3.2) internal successors, (112), 33 states have internal predecessors, (112), 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 08:17:24,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:17:24,413 INFO L93 Difference]: Finished difference Result 247 states and 315 transitions. [2022-03-20 08:17:24,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 08:17:24,413 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.2) internal successors, (112), 33 states have internal predecessors, (112), 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 79 [2022-03-20 08:17:24,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:17:24,414 INFO L225 Difference]: With dead ends: 247 [2022-03-20 08:17:24,414 INFO L226 Difference]: Without dead ends: 192 [2022-03-20 08:17:24,416 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1441, Invalid=2849, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 08:17:24,416 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 534 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 08:17:24,416 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 61 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 08:17:24,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-03-20 08:17:24,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2022-03-20 08:17:24,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.172972972972973) internal successors, (217), 185 states have internal predecessors, (217), 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 08:17:24,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 221 transitions. [2022-03-20 08:17:24,432 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 221 transitions. Word has length 79 [2022-03-20 08:17:24,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:17:24,432 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 221 transitions. [2022-03-20 08:17:24,433 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.2) internal successors, (112), 33 states have internal predecessors, (112), 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 08:17:24,433 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 221 transitions. [2022-03-20 08:17:24,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-03-20 08:17:24,435 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:17:24,435 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:17:24,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 08:17:24,652 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 08:17:24,653 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:17:24,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:17:24,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1983528018, now seen corresponding path program 4 times [2022-03-20 08:17:24,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:17:24,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074356945] [2022-03-20 08:17:24,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:24,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:17:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:25,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:17:25,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2022-03-20 08:17:25,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:17:25,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074356945] [2022-03-20 08:17:25,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074356945] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:17:25,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594129690] [2022-03-20 08:17:25,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 08:17:25,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:17:25,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:17:25,106 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 08:17:25,108 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 08:17:25,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 08:17:25,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:17:25,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 08:17:25,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:17:25,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2022-03-20 08:17:25,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:17:26,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2022-03-20 08:17:26,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594129690] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:17:26,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:17:26,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-03-20 08:17:26,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380708934] [2022-03-20 08:17:26,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:17:26,413 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-20 08:17:26,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:17:26,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-20 08:17:26,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 08:17:26,415 INFO L87 Difference]: Start difference. First operand 190 states and 221 transitions. Second operand has 64 states, 64 states have (on average 2.109375) internal successors, (135), 63 states have internal predecessors, (135), 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 08:17:28,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:17:28,380 INFO L93 Difference]: Finished difference Result 533 states and 687 transitions. [2022-03-20 08:17:28,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-20 08:17:28,381 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.109375) internal successors, (135), 63 states have internal predecessors, (135), 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 189 [2022-03-20 08:17:28,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:17:28,384 INFO L225 Difference]: With dead ends: 533 [2022-03-20 08:17:28,385 INFO L226 Difference]: Without dead ends: 408 [2022-03-20 08:17:28,390 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2379 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5736, Invalid=9516, Unknown=0, NotChecked=0, Total=15252 [2022-03-20 08:17:28,391 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1173 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1173 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 08:17:28,391 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1173 Valid, 52 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 08:17:28,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-03-20 08:17:28,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 252. [2022-03-20 08:17:28,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 247 states have (on average 1.1295546558704452) internal successors, (279), 247 states have internal predecessors, (279), 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 08:17:28,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 283 transitions. [2022-03-20 08:17:28,412 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 283 transitions. Word has length 189 [2022-03-20 08:17:28,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:17:28,414 INFO L478 AbstractCegarLoop]: Abstraction has 252 states and 283 transitions. [2022-03-20 08:17:28,414 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.109375) internal successors, (135), 63 states have internal predecessors, (135), 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 08:17:28,414 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 283 transitions. [2022-03-20 08:17:28,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-03-20 08:17:28,418 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:17:28,419 INFO L499 BasicCegarLoop]: trace histogram [60, 60, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:17:28,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 08:17:28,639 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 08:17:28,639 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:17:28,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:17:28,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1726150512, now seen corresponding path program 5 times [2022-03-20 08:17:28,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:17:28,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33031303] [2022-03-20 08:17:28,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:28,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:17:28,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:29,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:17:29,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:29,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5311 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2022-03-20 08:17:29,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:17:29,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33031303] [2022-03-20 08:17:29,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33031303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:17:29,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802980064] [2022-03-20 08:17:29,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 08:17:29,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:17:29,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:17:29,776 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 08:17:29,777 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 08:19:12,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2022-03-20 08:19:12,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:19:12,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-20 08:19:12,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:19:12,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5311 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2022-03-20 08:19:12,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:19:16,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5311 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2022-03-20 08:19:16,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802980064] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:19:16,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:19:16,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 126 [2022-03-20 08:19:16,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560221647] [2022-03-20 08:19:16,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:19:16,356 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-03-20 08:19:16,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:19:16,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-03-20 08:19:16,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-03-20 08:19:16,361 INFO L87 Difference]: Start difference. First operand 252 states and 283 transitions. Second operand has 126 states, 126 states have (on average 2.0555555555555554) internal successors, (259), 125 states have internal predecessors, (259), 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 08:19:24,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:19:24,233 INFO L93 Difference]: Finished difference Result 967 states and 1276 transitions. [2022-03-20 08:19:24,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-03-20 08:19:24,237 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0555555555555554) internal successors, (259), 125 states have internal predecessors, (259), 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 251 [2022-03-20 08:19:24,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:19:24,240 INFO L225 Difference]: With dead ends: 967 [2022-03-20 08:19:24,240 INFO L226 Difference]: Without dead ends: 842 [2022-03-20 08:19:24,246 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9571 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=23003, Invalid=38253, Unknown=0, NotChecked=0, Total=61256 [2022-03-20 08:19:24,246 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 3045 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 871 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3045 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 871 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 08:19:24,247 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3045 Valid, 42 Invalid, 1851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [871 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 08:19:24,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-03-20 08:19:24,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 376. [2022-03-20 08:19:24,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 371 states have (on average 1.0862533692722371) internal successors, (403), 371 states have internal predecessors, (403), 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 08:19:24,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 407 transitions. [2022-03-20 08:19:24,264 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 407 transitions. Word has length 251 [2022-03-20 08:19:24,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:19:24,264 INFO L478 AbstractCegarLoop]: Abstraction has 376 states and 407 transitions. [2022-03-20 08:19:24,265 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.0555555555555554) internal successors, (259), 125 states have internal predecessors, (259), 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 08:19:24,265 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 407 transitions. [2022-03-20 08:19:24,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-03-20 08:19:24,267 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:19:24,267 INFO L499 BasicCegarLoop]: trace histogram [122, 122, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:19:24,322 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 08:19:24,484 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 08:19:24,484 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:19:24,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:19:24,484 INFO L85 PathProgramCache]: Analyzing trace with hash -734465068, now seen corresponding path program 6 times [2022-03-20 08:19:24,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:19:24,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077037481] [2022-03-20 08:19:24,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:19:24,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:19:24,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:19:29,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:19:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:19:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16595 backedges. 0 proven. 14884 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2022-03-20 08:19:29,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:19:29,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077037481] [2022-03-20 08:19:29,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077037481] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:19:29,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875321364] [2022-03-20 08:19:29,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 08:19:29,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:19:29,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:19:29,015 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 08:19:29,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 08:24:51,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 59 check-sat command(s) [2022-03-20 08:24:51,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:24:51,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 08:24:51,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:24:52,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16595 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 14884 trivial. 0 not checked. [2022-03-20 08:24:52,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:24:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16595 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 14884 trivial. 0 not checked. [2022-03-20 08:24:54,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875321364] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:24:54,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:24:54,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 34, 34] total 159 [2022-03-20 08:24:54,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252830603] [2022-03-20 08:24:54,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:24:54,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-03-20 08:24:54,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:24:54,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-03-20 08:24:54,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12096, Invalid=13026, Unknown=0, NotChecked=0, Total=25122 [2022-03-20 08:24:54,957 INFO L87 Difference]: Start difference. First operand 376 states and 407 transitions. Second operand has 159 states, 159 states have (on average 3.169811320754717) internal successors, (504), 157 states have internal predecessors, (504), 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 08:25:09,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:25:09,519 INFO L93 Difference]: Finished difference Result 1187 states and 1527 transitions. [2022-03-20 08:25:09,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-03-20 08:25:09,519 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 3.169811320754717) internal successors, (504), 157 states have internal predecessors, (504), 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 375 [2022-03-20 08:25:09,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:25:09,522 INFO L225 Difference]: With dead ends: 1187 [2022-03-20 08:25:09,522 INFO L226 Difference]: Without dead ends: 936 [2022-03-20 08:25:09,527 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1184 GetRequests, 871 SyntacticMatches, 1 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13347 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=35975, Invalid=62307, Unknown=0, NotChecked=0, Total=98282 [2022-03-20 08:25:09,527 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 4376 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 1791 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4376 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 3055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1791 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 08:25:09,528 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4376 Valid, 56 Invalid, 3055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1791 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 08:25:09,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-03-20 08:25:09,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 934. [2022-03-20 08:25:09,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 929 states have (on average 1.1679224973089344) internal successors, (1085), 929 states have internal predecessors, (1085), 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 08:25:09,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1089 transitions. [2022-03-20 08:25:09,704 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1089 transitions. Word has length 375 [2022-03-20 08:25:09,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:25:09,705 INFO L478 AbstractCegarLoop]: Abstraction has 934 states and 1089 transitions. [2022-03-20 08:25:09,705 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 3.169811320754717) internal successors, (504), 157 states have internal predecessors, (504), 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 08:25:09,705 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1089 transitions. [2022-03-20 08:25:09,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 934 [2022-03-20 08:25:09,721 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:25:09,722 INFO L499 BasicCegarLoop]: trace histogram [154, 154, 153, 153, 153, 153, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:25:09,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 08:25:09,935 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:25:09,936 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:25:09,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:25:09,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1253376950, now seen corresponding path program 7 times [2022-03-20 08:25:09,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:25:09,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481072276] [2022-03-20 08:25:09,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:25:09,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:25:10,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:15,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:25:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:15,978 INFO L134 CoverageAnalysis]: Checked inductivity of 70380 backedges. 0 proven. 23409 refuted. 0 times theorem prover too weak. 46971 trivial. 0 not checked. [2022-03-20 08:25:15,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:25:15,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481072276] [2022-03-20 08:25:15,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481072276] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:25:15,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528939791] [2022-03-20 08:25:15,979 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 08:25:15,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:25:15,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:25:15,996 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:25:15,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 08:25:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:16,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 2672 conjuncts, 155 conjunts are in the unsatisfiable core [2022-03-20 08:25:16,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:25:17,782 INFO L134 CoverageAnalysis]: Checked inductivity of 70380 backedges. 0 proven. 23409 refuted. 0 times theorem prover too weak. 46971 trivial. 0 not checked. [2022-03-20 08:25:17,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:25:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 70380 backedges. 0 proven. 23409 refuted. 0 times theorem prover too weak. 46971 trivial. 0 not checked. [2022-03-20 08:25:36,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528939791] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:25:36,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:25:36,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [157, 156, 156] total 312 [2022-03-20 08:25:36,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329050751] [2022-03-20 08:25:36,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:25:36,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 312 states [2022-03-20 08:25:36,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:25:36,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 312 interpolants. [2022-03-20 08:25:36,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48207, Invalid=48825, Unknown=0, NotChecked=0, Total=97032 [2022-03-20 08:25:36,814 INFO L87 Difference]: Start difference. First operand 934 states and 1089 transitions. Second operand has 312 states, 312 states have (on average 2.0224358974358974) internal successors, (631), 311 states have internal predecessors, (631), 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 08:27:25,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:27:25,966 INFO L93 Difference]: Finished difference Result 2641 states and 3415 transitions. [2022-03-20 08:27:25,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 311 states. [2022-03-20 08:27:25,967 INFO L78 Accepts]: Start accepts. Automaton has has 312 states, 312 states have (on average 2.0224358974358974) internal successors, (631), 311 states have internal predecessors, (631), 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 933 [2022-03-20 08:27:25,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:27:25,972 INFO L225 Difference]: With dead ends: 2641 [2022-03-20 08:27:25,972 INFO L226 Difference]: Without dead ends: 2020 [2022-03-20 08:27:25,988 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2331 GetRequests, 1713 SyntacticMatches, 0 SemanticMatches, 618 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59977 ImplicationChecksByTransitivity, 45.4s TimeCoverageRelationStatistics Valid=143996, Invalid=239784, Unknown=0, NotChecked=0, Total=383780 [2022-03-20 08:27:25,989 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 8378 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 2376 mSolverCounterSat, 2376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8378 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 4752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2376 IncrementalHoareTripleChecker+Valid, 2376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-20 08:27:25,989 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8378 Valid, 62 Invalid, 4752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2376 Valid, 2376 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-20 08:27:25,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2022-03-20 08:27:26,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 1244. [2022-03-20 08:27:26,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1239 states have (on average 1.12590799031477) internal successors, (1395), 1239 states have internal predecessors, (1395), 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 08:27:26,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1399 transitions. [2022-03-20 08:27:26,177 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1399 transitions. Word has length 933 [2022-03-20 08:27:26,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:27:26,177 INFO L478 AbstractCegarLoop]: Abstraction has 1244 states and 1399 transitions. [2022-03-20 08:27:26,178 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 312 states, 312 states have (on average 2.0224358974358974) internal successors, (631), 311 states have internal predecessors, (631), 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 08:27:26,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1399 transitions. [2022-03-20 08:27:26,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1244 [2022-03-20 08:27:26,192 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:27:26,192 INFO L499 BasicCegarLoop]: trace histogram [308, 308, 154, 154, 153, 153, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:27:26,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 08:27:26,410 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 08:27:26,411 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:27:26,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:27:26,411 INFO L85 PathProgramCache]: Analyzing trace with hash 6256564, now seen corresponding path program 8 times [2022-03-20 08:27:26,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:27:26,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893067436] [2022-03-20 08:27:26,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:27:26,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:27:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:27:45,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:27:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:27:45,243 INFO L134 CoverageAnalysis]: Checked inductivity of 141835 backedges. 0 proven. 94864 refuted. 0 times theorem prover too weak. 46971 trivial. 0 not checked. [2022-03-20 08:27:45,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:27:45,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893067436] [2022-03-20 08:27:45,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893067436] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:27:45,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626734321] [2022-03-20 08:27:45,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:27:45,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:27:45,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:27:45,245 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:27:45,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 08:27:45,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:27:45,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:27:45,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 4067 conjuncts, 310 conjunts are in the unsatisfiable core [2022-03-20 08:27:45,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:27:47,283 INFO L134 CoverageAnalysis]: Checked inductivity of 141835 backedges. 0 proven. 94864 refuted. 0 times theorem prover too weak. 46971 trivial. 0 not checked. [2022-03-20 08:27:47,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:28:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 141835 backedges. 0 proven. 94864 refuted. 0 times theorem prover too weak. 46971 trivial. 0 not checked. [2022-03-20 08:28:42,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626734321] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:28:42,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:28:42,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [312, 311, 311] total 622 [2022-03-20 08:28:42,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286766115] [2022-03-20 08:28:42,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:28:42,737 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 622 states [2022-03-20 08:28:42,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:28:42,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 622 interpolants. [2022-03-20 08:28:42,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192512, Invalid=193750, Unknown=0, NotChecked=0, Total=386262 [2022-03-20 08:28:42,783 INFO L87 Difference]: Start difference. First operand 1244 states and 1399 transitions. Second operand has 622 states, 622 states have (on average 2.0112540192926045) internal successors, (1251), 621 states have internal predecessors, (1251), 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)