/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-lit/gj2007.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 21:58:52,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 21:58:52,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 21:58:52,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 21:58:52,306 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 21:58:52,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 21:58:52,308 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 21:58:52,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 21:58:52,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 21:58:52,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 21:58:52,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 21:58:52,316 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 21:58:52,316 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 21:58:52,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 21:58:52,319 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 21:58:52,321 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 21:58:52,321 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 21:58:52,322 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 21:58:52,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 21:58:52,327 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 21:58:52,328 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 21:58:52,329 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 21:58:52,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 21:58:52,330 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 21:58:52,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 21:58:52,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 21:58:52,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 21:58:52,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 21:58:52,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 21:58:52,343 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-18 21:58:52,365 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 21:58:52,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 21:58:52,367 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 21:58:52,367 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 21:58:52,367 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 21:58:52,368 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 21:58:52,368 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 21:58:52,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 21:58:52,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 21:58:52,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 21:58:52,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 21:58:52,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 21:58:52,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 21:58:52,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 21:58:52,369 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 21:58:52,369 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 21:58:52,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 21:58:52,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 21:58:52,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 21:58:52,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 21:58:52,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 21:58:52,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 21:58:52,369 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 21:58:52,370 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 21:58:52,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 21:58:52,370 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 21:58:52,370 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-18 21:58:52,370 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-18 21:58:52,371 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 21:58:52,371 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 21:58:52,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 21:58:52,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 21:58:52,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 21:58:52,574 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 21:58:52,574 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 21:58:52,575 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.i [2022-03-18 21:58:52,615 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f492e0143/36ab93b06ff546ff9da44cccdc61a52a/FLAG175910e07 [2022-03-18 21:58:52,960 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 21:58:52,960 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.i [2022-03-18 21:58:52,965 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f492e0143/36ab93b06ff546ff9da44cccdc61a52a/FLAG175910e07 [2022-03-18 21:58:52,974 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f492e0143/36ab93b06ff546ff9da44cccdc61a52a [2022-03-18 21:58:52,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 21:58:52,976 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 21:58:52,977 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 21:58:52,977 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 21:58:52,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 21:58:52,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 09:58:52" (1/1) ... [2022-03-18 21:58:52,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b48a776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:58:52, skipping insertion in model container [2022-03-18 21:58:52,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 09:58:52" (1/1) ... [2022-03-18 21:58:52,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 21:58:52,994 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 21:58:53,137 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-lit/gj2007.i[895,908] [2022-03-18 21:58:53,143 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 21:58:53,151 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 21:58:53,159 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-lit/gj2007.i[895,908] [2022-03-18 21:58:53,160 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 21:58:53,168 INFO L208 MainTranslator]: Completed translation [2022-03-18 21:58:53,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:58:53 WrapperNode [2022-03-18 21:58:53,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 21:58:53,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 21:58:53,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 21:58:53,170 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 21:58:53,177 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:58:53" (1/1) ... [2022-03-18 21:58:53,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:58:53" (1/1) ... [2022-03-18 21:58:53,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:58:53" (1/1) ... [2022-03-18 21:58:53,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:58:53" (1/1) ... [2022-03-18 21:58:53,183 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:58:53" (1/1) ... [2022-03-18 21:58:53,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:58:53" (1/1) ... [2022-03-18 21:58:53,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:58:53" (1/1) ... [2022-03-18 21:58:53,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 21:58:53,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 21:58:53,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 21:58:53,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 21:58:53,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:58:53" (1/1) ... [2022-03-18 21:58:53,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 21:58:53,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:58:53,210 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) [2022-03-18 21:58:53,219 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 [2022-03-18 21:58:53,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 21:58:53,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 21:58:53,262 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 21:58:53,262 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 21:58:53,262 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 21:58:53,262 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 21:58:53,262 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 21:58:53,262 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 21:58:53,263 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-18 21:58:53,263 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-18 21:58:53,263 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 21:58:53,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 21:58:53,263 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 21:58:53,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 21:58:53,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 21:58:53,263 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 21:58:53,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 21:58:53,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 21:58:53,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 21:58:53,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 21:58:53,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 21:58:53,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 21:58:53,313 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 21:58:53,314 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 21:58:53,379 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 21:58:53,383 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 21:58:53,383 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 21:58:53,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 09:58:53 BoogieIcfgContainer [2022-03-18 21:58:53,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 21:58:53,385 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 21:58:53,385 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 21:58:53,386 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 21:58:53,388 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 09:58:53" (1/1) ... [2022-03-18 21:58:53,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 09:58:53 BasicIcfg [2022-03-18 21:58:53,398 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 21:58:53,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 21:58:53,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 21:58:53,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 21:58:53,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 09:58:52" (1/4) ... [2022-03-18 21:58:53,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@605a9230 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 09:58:53, skipping insertion in model container [2022-03-18 21:58:53,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:58:53" (2/4) ... [2022-03-18 21:58:53,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@605a9230 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 09:58:53, skipping insertion in model container [2022-03-18 21:58:53,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 09:58:53" (3/4) ... [2022-03-18 21:58:53,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@605a9230 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 09:58:53, skipping insertion in model container [2022-03-18 21:58:53,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 09:58:53" (4/4) ... [2022-03-18 21:58:53,402 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007.iqvasr [2022-03-18 21:58:53,406 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 21:58:53,406 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 21:58:53,434 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 21:58:53,438 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 [2022-03-18 21:58:53,438 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 21:58:53,459 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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) [2022-03-18 21:58:53,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 21:58:53,463 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:58:53,463 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:58:53,464 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:58:53,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:58:53,467 INFO L85 PathProgramCache]: Analyzing trace with hash -2102751182, now seen corresponding path program 1 times [2022-03-18 21:58:53,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:58:53,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337936499] [2022-03-18 21:58:53,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:58:53,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:58:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:58:53,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:58:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:58:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:58:53,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:58:53,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337936499] [2022-03-18 21:58:53,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337936499] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:58:53,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:58:53,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 21:58:53,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339227497] [2022-03-18 21:58:53,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:58:53,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 21:58:53,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:58:53,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 21:58:53,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 21:58:53,628 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-03-18 21:58:53,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:58:53,653 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-03-18 21:58:53,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 21:58:53,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2022-03-18 21:58:53,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:58:53,659 INFO L225 Difference]: With dead ends: 32 [2022-03-18 21:58:53,659 INFO L226 Difference]: Without dead ends: 13 [2022-03-18 21:58:53,661 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 21:58:53,664 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 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 [2022-03-18 21:58:53,664 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:58:53,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-03-18 21:58:53,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-03-18 21:58:53,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2022-03-18 21:58:53,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-03-18 21:58:53,684 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-03-18 21:58:53,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:58:53,685 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-03-18 21:58:53,685 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-03-18 21:58:53,685 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-03-18 21:58:53,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 21:58:53,685 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:58:53,685 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:58:53,685 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 21:58:53,686 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:58:53,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:58:53,686 INFO L85 PathProgramCache]: Analyzing trace with hash -2101827661, now seen corresponding path program 1 times [2022-03-18 21:58:53,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:58:53,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338378766] [2022-03-18 21:58:53,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:58:53,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:58:53,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:58:53,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:58:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:58:53,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:58:53,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:58:53,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338378766] [2022-03-18 21:58:53,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338378766] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:58:53,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:58:53,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:58:53,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116900417] [2022-03-18 21:58:53,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:58:53,740 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:58:53,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:58:53,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:58:53,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:58:53,741 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-03-18 21:58:53,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:58:53,767 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-03-18 21:58:53,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:58:53,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2022-03-18 21:58:53,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:58:53,768 INFO L225 Difference]: With dead ends: 22 [2022-03-18 21:58:53,768 INFO L226 Difference]: Without dead ends: 15 [2022-03-18 21:58:53,768 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:58:53,769 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:58:53,770 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:58:53,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-18 21:58:53,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-18 21:58:53,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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) [2022-03-18 21:58:53,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-03-18 21:58:53,774 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-03-18 21:58:53,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:58:53,774 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-03-18 21:58:53,774 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-03-18 21:58:53,774 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-03-18 21:58:53,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-18 21:58:53,775 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:58:53,775 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:58:53,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 21:58:53,775 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:58:53,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:58:53,776 INFO L85 PathProgramCache]: Analyzing trace with hash -311341615, now seen corresponding path program 1 times [2022-03-18 21:58:53,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:58:53,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929653101] [2022-03-18 21:58:53,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:58:53,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:58:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:58:53,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:58:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:58:53,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:58:53,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:58:53,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929653101] [2022-03-18 21:58:53,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929653101] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:58:53,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248838274] [2022-03-18 21:58:53,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:58:53,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:58:53,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:58:53,872 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) [2022-03-18 21:58:53,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 21:58:53,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:58:53,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-18 21:58:53,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:58:54,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:58:54,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 21:58:54,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:58:54,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248838274] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 21:58:54,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 21:58:54,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-18 21:58:54,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931276471] [2022-03-18 21:58:54,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 21:58:54,067 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 21:58:54,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:58:54,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 21:58:54,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-18 21:58:54,069 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 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) [2022-03-18 21:58:54,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:58:54,184 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2022-03-18 21:58:54,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 21:58:54,184 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 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 13 [2022-03-18 21:58:54,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:58:54,185 INFO L225 Difference]: With dead ends: 27 [2022-03-18 21:58:54,185 INFO L226 Difference]: Without dead ends: 20 [2022-03-18 21:58:54,185 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-18 21:58:54,186 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:58:54,187 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 23 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:58:54,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-18 21:58:54,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-18 21:58:54,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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) [2022-03-18 21:58:54,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-03-18 21:58:54,190 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2022-03-18 21:58:54,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:58:54,191 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-03-18 21:58:54,191 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 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) [2022-03-18 21:58:54,191 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-03-18 21:58:54,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-18 21:58:54,191 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:58:54,191 INFO L500 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:58:54,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 21:58:54,392 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 [2022-03-18 21:58:54,392 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:58:54,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:58:54,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1743415465, now seen corresponding path program 1 times [2022-03-18 21:58:54,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:58:54,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709167405] [2022-03-18 21:58:54,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:58:54,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:58:54,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:58:54,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:58:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:58:54,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 21:58:54,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:58:54,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709167405] [2022-03-18 21:58:54,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709167405] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:58:54,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447846185] [2022-03-18 21:58:54,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:58:54,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:58:54,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:58:54,504 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) [2022-03-18 21:58:54,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 21:58:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:58:54,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 21:58:54,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:58:54,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 21:58:54,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 21:58:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 21:58:54,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447846185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 21:58:54,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 21:58:54,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-18 21:58:54,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927337769] [2022-03-18 21:58:54,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 21:58:54,679 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 21:58:54,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:58:54,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 21:58:54,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-18 21:58:54,682 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 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) [2022-03-18 21:58:54,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:58:54,786 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-03-18 21:58:54,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 21:58:54,786 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 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 19 [2022-03-18 21:58:54,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:58:54,789 INFO L225 Difference]: With dead ends: 38 [2022-03-18 21:58:54,789 INFO L226 Difference]: Without dead ends: 28 [2022-03-18 21:58:54,789 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-18 21:58:54,792 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:58:54,793 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 39 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:58:54,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-18 21:58:54,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-03-18 21:58:54,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 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) [2022-03-18 21:58:54,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-03-18 21:58:54,806 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 19 [2022-03-18 21:58:54,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:58:54,807 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-03-18 21:58:54,808 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 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) [2022-03-18 21:58:54,808 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-03-18 21:58:54,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 21:58:54,810 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:58:54,810 INFO L500 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:58:54,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 21:58:55,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-18 21:58:55,011 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:58:55,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:58:55,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1783682015, now seen corresponding path program 2 times [2022-03-18 21:58:55,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:58:55,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510399077] [2022-03-18 21:58:55,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:58:55,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:58:55,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:58:55,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:58:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:58:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 21:58:55,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:58:55,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510399077] [2022-03-18 21:58:55,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510399077] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:58:55,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011835187] [2022-03-18 21:58:55,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 21:58:55,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:58:55,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:58:55,089 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) [2022-03-18 21:58:55,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 21:58:55,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 21:58:55,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 21:58:55,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 21:58:55,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:58:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 21:58:55,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 21:58:55,354 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 21:58:55,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011835187] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 21:58:55,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 21:58:55,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-18 21:58:55,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187974801] [2022-03-18 21:58:55,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 21:58:55,356 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 21:58:55,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:58:55,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 21:58:55,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-18 21:58:55,357 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 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) [2022-03-18 21:58:55,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:58:55,539 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2022-03-18 21:58:55,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 21:58:55,539 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 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 27 [2022-03-18 21:58:55,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:58:55,540 INFO L225 Difference]: With dead ends: 54 [2022-03-18 21:58:55,540 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 21:58:55,540 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2022-03-18 21:58:55,541 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:58:55,541 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 39 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:58:55,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 21:58:55,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-18 21:58:55,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 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) [2022-03-18 21:58:55,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-03-18 21:58:55,546 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 27 [2022-03-18 21:58:55,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:58:55,546 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-03-18 21:58:55,546 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 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) [2022-03-18 21:58:55,546 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-03-18 21:58:55,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 21:58:55,547 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:58:55,547 INFO L500 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:58:55,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 21:58:55,762 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:58:55,763 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:58:55,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:58:55,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1181496559, now seen corresponding path program 3 times [2022-03-18 21:58:55,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:58:55,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235332376] [2022-03-18 21:58:55,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:58:55,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:58:55,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:58:55,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:58:55,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:58:55,976 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 21:58:55,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:58:55,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235332376] [2022-03-18 21:58:55,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235332376] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:58:55,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633044991] [2022-03-18 21:58:55,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 21:58:55,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:58:55,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:58:55,978 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) [2022-03-18 21:58:55,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 21:58:56,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-18 21:58:56,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 21:58:56,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 21:58:56,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:58:56,109 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-03-18 21:58:56,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 21:58:56,208 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-03-18 21:58:56,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633044991] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 21:58:56,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 21:58:56,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 24 [2022-03-18 21:58:56,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073238577] [2022-03-18 21:58:56,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 21:58:56,209 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 21:58:56,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:58:56,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 21:58:56,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-03-18 21:58:56,210 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 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) [2022-03-18 21:58:56,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:58:56,535 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2022-03-18 21:58:56,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 21:58:56,535 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 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 43 [2022-03-18 21:58:56,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:58:56,537 INFO L225 Difference]: With dead ends: 64 [2022-03-18 21:58:56,537 INFO L226 Difference]: Without dead ends: 54 [2022-03-18 21:58:56,538 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 21:58:56,538 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:58:56,539 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 23 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:58:56,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-18 21:58:56,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-18 21:58:56,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:58:56,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2022-03-18 21:58:56,545 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 43 [2022-03-18 21:58:56,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:58:56,545 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2022-03-18 21:58:56,545 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 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) [2022-03-18 21:58:56,545 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2022-03-18 21:58:56,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 21:58:56,546 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:58:56,546 INFO L500 BasicCegarLoop]: trace histogram [21, 15, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:58:56,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 21:58:56,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:58:56,760 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:58:56,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:58:56,760 INFO L85 PathProgramCache]: Analyzing trace with hash 91100323, now seen corresponding path program 4 times [2022-03-18 21:58:56,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:58:56,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599296634] [2022-03-18 21:58:56,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:58:56,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:58:56,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:58:56,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:58:56,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:58:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 21:58:56,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:58:56,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599296634] [2022-03-18 21:58:56,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599296634] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:58:56,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240968674] [2022-03-18 21:58:56,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 21:58:56,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:58:56,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:58:56,964 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) [2022-03-18 21:58:56,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 21:58:56,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 21:58:56,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 21:58:57,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 21:58:57,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:58:57,083 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 21:58:57,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 21:58:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 21:58:57,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240968674] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 21:58:57,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 21:58:57,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-18 21:58:57,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912787989] [2022-03-18 21:58:57,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 21:58:57,464 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-18 21:58:57,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:58:57,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-18 21:58:57,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 21:58:57,465 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 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) [2022-03-18 21:58:57,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:58:57,984 INFO L93 Difference]: Finished difference Result 106 states and 135 transitions. [2022-03-18 21:58:57,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 21:58:57,984 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 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 53 [2022-03-18 21:58:57,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:58:57,985 INFO L225 Difference]: With dead ends: 106 [2022-03-18 21:58:57,985 INFO L226 Difference]: Without dead ends: 88 [2022-03-18 21:58:57,986 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2022-03-18 21:58:57,987 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:58:57,987 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 29 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:58:57,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-18 21:58:57,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-18 21:58:57,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 83 states have internal predecessors, (90), 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) [2022-03-18 21:58:57,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2022-03-18 21:58:57,994 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 53 [2022-03-18 21:58:57,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:58:57,994 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2022-03-18 21:58:57,994 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 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) [2022-03-18 21:58:57,994 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2022-03-18 21:58:57,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-18 21:58:57,996 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:58:57,996 INFO L500 BasicCegarLoop]: trace histogram [38, 32, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:58:58,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 21:58:58,213 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:58:58,213 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:58:58,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:58:58,213 INFO L85 PathProgramCache]: Analyzing trace with hash 303694625, now seen corresponding path program 5 times [2022-03-18 21:58:58,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:58:58,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998045081] [2022-03-18 21:58:58,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:58:58,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:58:58,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:58:58,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:58:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:58:58,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 21:58:58,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:58:58,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998045081] [2022-03-18 21:58:58,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998045081] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:58:58,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381543193] [2022-03-18 21:58:58,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 21:58:58,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:58:58,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:58:58,688 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) [2022-03-18 21:58:58,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 21:58:58,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2022-03-18 21:58:58,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 21:58:58,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-18 21:58:58,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:58:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 21:58:58,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 21:58:59,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 21:58:59,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381543193] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 21:58:59,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 21:58:59,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 54 [2022-03-18 21:58:59,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941368410] [2022-03-18 21:58:59,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 21:58:59,545 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-18 21:58:59,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:58:59,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-18 21:58:59,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 21:58:59,547 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 53 states have internal predecessors, (115), 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) [2022-03-18 21:59:00,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:59:00,618 INFO L93 Difference]: Finished difference Result 142 states and 172 transitions. [2022-03-18 21:59:00,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-18 21:59:00,619 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 53 states have internal predecessors, (115), 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 87 [2022-03-18 21:59:00,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:59:00,620 INFO L225 Difference]: With dead ends: 142 [2022-03-18 21:59:00,620 INFO L226 Difference]: Without dead ends: 124 [2022-03-18 21:59:00,623 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4031, Invalid=6681, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 21:59:00,624 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:59:00,624 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 29 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:59:00,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-18 21:59:00,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-03-18 21:59:00,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0588235294117647) internal successors, (126), 119 states have internal predecessors, (126), 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) [2022-03-18 21:59:00,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2022-03-18 21:59:00,632 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 87 [2022-03-18 21:59:00,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:59:00,632 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2022-03-18 21:59:00,633 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 53 states have internal predecessors, (115), 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) [2022-03-18 21:59:00,633 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2022-03-18 21:59:00,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-18 21:59:00,634 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:59:00,634 INFO L500 BasicCegarLoop]: trace histogram [56, 50, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:59:00,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 21:59:00,841 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:59:00,841 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:59:00,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:59:00,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1836286909, now seen corresponding path program 6 times [2022-03-18 21:59:00,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:59:00,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951094268] [2022-03-18 21:59:00,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:59:00,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:59:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:59:01,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:59:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:59:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:59:01,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:59:01,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951094268] [2022-03-18 21:59:01,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951094268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:59:01,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230297034] [2022-03-18 21:59:01,934 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 21:59:01,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:59:01,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:59:01,935 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) [2022-03-18 21:59:01,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 21:59:01,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-03-18 21:59:01,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 21:59:01,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 21:59:01,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:59:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 650 proven. 36 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-03-18 21:59:02,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 21:59:02,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 650 proven. 36 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-03-18 21:59:02,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230297034] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 21:59:02,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 21:59:02,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 9, 9] total 67 [2022-03-18 21:59:02,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494188370] [2022-03-18 21:59:02,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 21:59:02,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-18 21:59:02,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:59:02,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-18 21:59:02,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-03-18 21:59:02,545 INFO L87 Difference]: Start difference. First operand 124 states and 130 transitions. Second operand has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 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) [2022-03-18 21:59:04,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:59:04,155 INFO L93 Difference]: Finished difference Result 145 states and 166 transitions. [2022-03-18 21:59:04,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-18 21:59:04,155 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 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 123 [2022-03-18 21:59:04,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:59:04,156 INFO L225 Difference]: With dead ends: 145 [2022-03-18 21:59:04,156 INFO L226 Difference]: Without dead ends: 140 [2022-03-18 21:59:04,160 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-03-18 21:59:04,161 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 134 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 21:59:04,161 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 33 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 21:59:04,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-18 21:59:04,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2022-03-18 21:59:04,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.1111111111111112) internal successors, (150), 135 states have internal predecessors, (150), 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) [2022-03-18 21:59:04,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2022-03-18 21:59:04,168 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 123 [2022-03-18 21:59:04,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:59:04,169 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2022-03-18 21:59:04,169 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 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) [2022-03-18 21:59:04,169 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2022-03-18 21:59:04,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-18 21:59:04,170 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:59:04,170 INFO L500 BasicCegarLoop]: trace histogram [64, 50, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:59:04,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 21:59:04,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:59:04,388 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:59:04,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:59:04,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1500719781, now seen corresponding path program 7 times [2022-03-18 21:59:04,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:59:04,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581177156] [2022-03-18 21:59:04,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:59:04,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:59:04,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:59:05,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:59:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:59:05,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:59:05,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:59:05,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581177156] [2022-03-18 21:59:05,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581177156] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:59:05,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338315902] [2022-03-18 21:59:05,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 21:59:05,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:59:05,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:59:05,787 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) [2022-03-18 21:59:05,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 21:59:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:59:05,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-18 21:59:05,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:59:06,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:59:06,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 21:59:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:59:07,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338315902] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 21:59:07,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 21:59:07,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 104 [2022-03-18 21:59:07,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665847665] [2022-03-18 21:59:07,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 21:59:07,617 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-03-18 21:59:07,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:59:07,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-03-18 21:59:07,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 21:59:07,622 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 104 states, 104 states have (on average 2.1634615384615383) internal successors, (225), 103 states have internal predecessors, (225), 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) [2022-03-18 21:59:10,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:59:10,876 INFO L93 Difference]: Finished difference Result 217 states and 302 transitions. [2022-03-18 21:59:10,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-18 21:59:10,877 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.1634615384615383) internal successors, (225), 103 states have internal predecessors, (225), 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 139 [2022-03-18 21:59:10,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:59:10,878 INFO L225 Difference]: With dead ends: 217 [2022-03-18 21:59:10,878 INFO L226 Difference]: Without dead ends: 212 [2022-03-18 21:59:10,882 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5906 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=15556, Invalid=25856, Unknown=0, NotChecked=0, Total=41412 [2022-03-18 21:59:10,883 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 206 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 688 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 688 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 21:59:10,884 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 23 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [688 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 21:59:10,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-18 21:59:10,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-03-18 21:59:10,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.2463768115942029) internal successors, (258), 207 states have internal predecessors, (258), 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) [2022-03-18 21:59:10,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 262 transitions. [2022-03-18 21:59:10,903 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 262 transitions. Word has length 139 [2022-03-18 21:59:10,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:59:10,904 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 262 transitions. [2022-03-18 21:59:10,904 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.1634615384615383) internal successors, (225), 103 states have internal predecessors, (225), 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) [2022-03-18 21:59:10,904 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 262 transitions. [2022-03-18 21:59:10,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-03-18 21:59:10,906 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:59:10,906 INFO L500 BasicCegarLoop]: trace histogram [100, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:59:10,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 21:59:11,113 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 21:59:11,114 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:59:11,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:59:11,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1560556615, now seen corresponding path program 8 times [2022-03-18 21:59:11,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:59:11,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020693705] [2022-03-18 21:59:11,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:59:11,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:59:11,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:59:12,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:59:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:59:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2022-03-18 21:59:12,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:59:12,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020693705] [2022-03-18 21:59:12,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020693705] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:59:12,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265804183] [2022-03-18 21:59:12,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 21:59:12,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:59:12,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:59:12,361 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) [2022-03-18 21:59:12,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 21:59:12,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 21:59:12,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 21:59:12,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 105 conjunts are in the unsatisfiable core [2022-03-18 21:59:12,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:59:13,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2022-03-18 21:59:13,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 21:59:13,859 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2022-03-18 21:59:13,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265804183] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 21:59:13,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 21:59:13,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 58 [2022-03-18 21:59:13,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579735030] [2022-03-18 21:59:13,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 21:59:13,860 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-18 21:59:13,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:59:13,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-18 21:59:13,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2022-03-18 21:59:13,861 INFO L87 Difference]: Start difference. First operand 212 states and 262 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 55 states have internal predecessors, (111), 2 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) [2022-03-18 21:59:16,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:59:16,818 INFO L93 Difference]: Finished difference Result 2868 states and 4243 transitions. [2022-03-18 21:59:16,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-18 21:59:16,818 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 55 states have internal predecessors, (111), 2 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 211 [2022-03-18 21:59:16,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:59:16,827 INFO L225 Difference]: With dead ends: 2868 [2022-03-18 21:59:16,827 INFO L226 Difference]: Without dead ends: 2863 [2022-03-18 21:59:16,829 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 417 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=332, Invalid=11878, Unknown=0, NotChecked=0, Total=12210 [2022-03-18 21:59:16,830 INFO L912 BasicCegarLoop]: 112 mSDtfsCounter, 164 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 8645 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 8699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 8645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-18 21:59:16,830 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 389 Invalid, 8699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 8645 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-18 21:59:16,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2022-03-18 21:59:16,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 214. [2022-03-18 21:59:16,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.2488038277511961) internal successors, (261), 209 states have internal predecessors, (261), 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) [2022-03-18 21:59:16,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 265 transitions. [2022-03-18 21:59:16,895 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 265 transitions. Word has length 211 [2022-03-18 21:59:16,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:59:16,896 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 265 transitions. [2022-03-18 21:59:16,896 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 55 states have internal predecessors, (111), 2 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) [2022-03-18 21:59:16,897 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 265 transitions. [2022-03-18 21:59:16,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-03-18 21:59:16,899 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:59:16,899 INFO L500 BasicCegarLoop]: trace histogram [101, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:59:16,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 21:59:17,116 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:59:17,117 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:59:17,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:59:17,117 INFO L85 PathProgramCache]: Analyzing trace with hash 187719926, now seen corresponding path program 9 times [2022-03-18 21:59:17,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:59:17,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718155283] [2022-03-18 21:59:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:59:17,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:59:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:59:18,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:59:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:59:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 7651 proven. 0 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2022-03-18 21:59:18,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:59:18,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718155283] [2022-03-18 21:59:18,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718155283] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:59:18,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:59:18,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-18 21:59:18,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597908378] [2022-03-18 21:59:18,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:59:18,084 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-18 21:59:18,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:59:18,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-18 21:59:18,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-03-18 21:59:18,085 INFO L87 Difference]: Start difference. First operand 214 states and 265 transitions. Second operand has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 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) [2022-03-18 21:59:18,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:59:18,892 INFO L93 Difference]: Finished difference Result 313 states and 413 transitions. [2022-03-18 21:59:18,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-18 21:59:18,892 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 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 213 [2022-03-18 21:59:18,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:59:18,893 INFO L225 Difference]: With dead ends: 313 [2022-03-18 21:59:18,893 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 21:59:18,894 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 21:59:18,895 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 21:59:18,895 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 31 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 21:59:18,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 21:59:18,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 21:59:18,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-18 21:59:18,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 21:59:18,895 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 213 [2022-03-18 21:59:18,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:59:18,895 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 21:59:18,896 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 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) [2022-03-18 21:59:18,896 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 21:59:18,896 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 21:59:18,898 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 21:59:18,898 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-18 21:59:18,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-18 21:59:25,438 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-18 21:59:25,438 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-18 21:59:25,439 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-18 21:59:25,439 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-18 21:59:25,439 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-18 21:59:25,439 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-18 21:59:25,439 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-18 21:59:25,439 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 24 37) the Hoare annotation is: true [2022-03-18 21:59:25,440 INFO L878 garLoopResultBuilder]: At program point L28-2(lines 27 34) the Hoare annotation is: (or (and (<= main_~y~0 69) (<= 69 main_~y~0) (< main_~x~0 70) (<= 69 main_~x~0)) (and (< main_~x~0 76) (<= 75 main_~y~0) (<= 75 main_~x~0) (<= main_~y~0 75)) (and (<= 80 main_~x~0) (<= main_~y~0 80) (< main_~x~0 81) (<= 80 main_~y~0)) (and (<= 58 main_~x~0) (<= main_~x~0 58) (<= 58 main_~y~0) (<= main_~y~0 58)) (and (< main_~x~0 89) (<= main_~y~0 88) (<= 88 main_~y~0) (<= 88 main_~x~0)) (and (< main_~x~0 85) (<= 84 main_~x~0) (<= main_~y~0 84) (<= 84 main_~y~0)) (and (<= 77 main_~y~0) (< main_~x~0 78) (<= main_~y~0 77) (<= 77 main_~x~0)) (and (<= 66 main_~y~0) (<= main_~y~0 66) (<= 66 main_~x~0) (< main_~x~0 67)) (and (< main_~x~0 97) (<= 96 main_~y~0) (<= 96 main_~x~0) (<= main_~y~0 96)) (and (<= 74 main_~x~0) (<= 74 main_~y~0) (<= main_~y~0 74) (< main_~x~0 75)) (and (< main_~x~0 77) (<= 76 main_~x~0) (<= main_~y~0 76) (<= 76 main_~y~0)) (and (< main_~x~0 94) (<= 93 main_~y~0) (<= main_~y~0 93) (<= 93 main_~x~0)) (and (<= main_~y~0 53) (<= 53 main_~x~0) (<= 53 main_~y~0) (<= main_~x~0 53)) (and (<= 78 main_~y~0) (<= 78 main_~x~0) (< main_~x~0 79) (<= main_~y~0 78)) (and (<= 92 main_~y~0) (<= 92 main_~x~0) (<= main_~y~0 92) (< main_~x~0 93)) (and (<= main_~y~0 56) (<= main_~x~0 56) (<= 56 main_~x~0) (<= 56 main_~y~0)) (and (<= 51 main_~y~0) (<= main_~x~0 51) (<= 51 main_~x~0) (<= main_~y~0 51)) (and (<= 90 main_~y~0) (<= main_~y~0 90) (<= 90 main_~x~0) (< main_~x~0 91)) (and (<= 70 main_~x~0) (<= 70 main_~y~0) (<= main_~y~0 70) (< main_~x~0 71)) (and (<= main_~y~0 68) (<= 68 main_~y~0) (<= 68 main_~x~0) (< main_~x~0 69)) (and (<= main_~x~0 55) (<= 55 main_~y~0) (<= main_~y~0 55) (<= 55 main_~x~0)) (and (<= 81 main_~x~0) (<= main_~y~0 81) (< main_~x~0 82) (<= 81 main_~y~0)) (and (<= main_~x~0 63) (<= 63 main_~x~0) (<= 63 main_~y~0) (<= main_~y~0 63)) (and (<= 65 main_~y~0) (<= main_~y~0 65) (<= 65 main_~x~0) (< main_~x~0 66)) (and (<= main_~x~0 60) (<= 60 main_~y~0) (<= main_~y~0 60) (<= 60 main_~x~0)) (and (<= 97 main_~y~0) (< main_~x~0 98) (<= 97 main_~x~0) (<= main_~y~0 97)) (and (<= main_~y~0 85) (<= 85 main_~x~0) (<= 85 main_~y~0) (< main_~x~0 86)) (and (<= main_~y~0 59) (<= main_~x~0 59) (<= 59 main_~x~0) (<= 59 main_~y~0)) (and (<= 86 main_~y~0) (< main_~x~0 87) (<= 86 main_~x~0) (<= main_~y~0 86)) (and (<= 54 main_~y~0) (<= main_~x~0 54) (<= 54 main_~x~0) (<= main_~y~0 54)) (and (<= main_~y~0 72) (< main_~x~0 73) (<= 72 main_~x~0) (<= 72 main_~y~0)) (and (<= 91 main_~y~0) (<= main_~y~0 91) (<= 91 main_~x~0) (< main_~x~0 92)) (and (<= main_~y~0 52) (<= main_~x~0 52) (<= 52 main_~x~0) (<= 52 main_~y~0)) (and (<= 62 main_~x~0) (<= main_~y~0 62) (<= main_~x~0 62) (<= 62 main_~y~0)) (and (<= main_~y~0 57) (<= 57 main_~x~0) (<= 57 main_~y~0) (<= main_~x~0 57)) (and (<= main_~y~0 71) (<= 71 main_~y~0) (< main_~x~0 72) (<= 71 main_~x~0)) (and (<= 79 main_~x~0) (< main_~x~0 80) (<= main_~y~0 79) (<= 79 main_~y~0)) (and (<= main_~x~0 61) (<= main_~y~0 61) (<= 61 main_~x~0) (<= 61 main_~y~0)) (and (< main_~x~0 100) (<= 99 main_~x~0) (<= main_~y~0 99) (<= 99 main_~y~0)) (and (<= 64 main_~y~0) (<= main_~y~0 64) (<= main_~x~0 64) (<= 64 main_~x~0)) (and (<= main_~y~0 73) (<= 73 main_~x~0) (< main_~x~0 74) (<= 73 main_~y~0)) (and (<= 82 main_~x~0) (<= 82 main_~y~0) (<= main_~y~0 82) (< main_~x~0 83)) (and (<= main_~y~0 94) (<= 94 main_~x~0) (<= 94 main_~y~0) (< main_~x~0 95)) (and (<= 50 main_~y~0) (<= main_~x~0 50) (<= main_~y~0 50)) (and (< main_~x~0 99) (<= 98 main_~y~0) (<= 98 main_~x~0) (<= main_~y~0 98)) (and (<= 83 main_~x~0) (< main_~x~0 84) (<= 83 main_~y~0) (<= main_~y~0 83)) (and (< main_~x~0 88) (<= main_~y~0 87) (<= 87 main_~x~0) (<= 87 main_~y~0)) (and (<= main_~y~0 67) (<= 67 main_~x~0) (<= 67 main_~y~0) (< main_~x~0 68)) (and (< 99 main_~y~0) (<= 100 main_~x~0) (<= main_~y~0 100)) (and (<= 95 main_~x~0) (< main_~x~0 96) (<= 95 main_~y~0) (<= main_~y~0 95)) (and (<= main_~y~0 89) (<= 89 main_~y~0) (<= 89 main_~x~0) (< main_~x~0 90))) [2022-03-18 21:59:25,440 INFO L878 garLoopResultBuilder]: At program point L27-2(lines 27 34) the Hoare annotation is: (and (< 99 main_~y~0) (<= main_~y~0 100)) [2022-03-18 21:59:25,441 INFO L882 garLoopResultBuilder]: For program point L28(lines 28 33) no Hoare annotation was computed. [2022-03-18 21:59:25,441 INFO L882 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2022-03-18 21:59:25,441 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 24 37) no Hoare annotation was computed. [2022-03-18 21:59:25,441 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 24 37) no Hoare annotation was computed. [2022-03-18 21:59:25,441 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-03-18 21:59:25,441 INFO L882 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-03-18 21:59:25,441 INFO L882 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2022-03-18 21:59:25,441 INFO L882 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2022-03-18 21:59:25,441 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2022-03-18 21:59:25,441 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2022-03-18 21:59:25,444 INFO L718 BasicCegarLoop]: Path program histogram: [9, 1, 1, 1] [2022-03-18 21:59:25,444 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 21:59:25,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 09:59:25 BasicIcfg [2022-03-18 21:59:25,485 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 21:59:25,486 INFO L158 Benchmark]: Toolchain (without parser) took 32509.41ms. Allocated memory was 215.0MB in the beginning and 475.0MB in the end (delta: 260.0MB). Free memory was 161.9MB in the beginning and 410.0MB in the end (delta: -248.1MB). Peak memory consumption was 258.7MB. Max. memory is 8.0GB. [2022-03-18 21:59:25,486 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 215.0MB. Free memory is still 178.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 21:59:25,486 INFO L158 Benchmark]: CACSL2BoogieTranslator took 192.09ms. Allocated memory is still 215.0MB. Free memory was 161.8MB in the beginning and 191.1MB in the end (delta: -29.3MB). Peak memory consumption was 13.1MB. Max. memory is 8.0GB. [2022-03-18 21:59:25,486 INFO L158 Benchmark]: Boogie Preprocessor took 17.59ms. Allocated memory is still 215.0MB. Free memory was 191.1MB in the beginning and 189.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 21:59:25,486 INFO L158 Benchmark]: RCFGBuilder took 196.71ms. Allocated memory is still 215.0MB. Free memory was 189.6MB in the beginning and 180.2MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-18 21:59:25,486 INFO L158 Benchmark]: IcfgTransformer took 12.69ms. Allocated memory is still 215.0MB. Free memory was 180.1MB in the beginning and 178.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-18 21:59:25,486 INFO L158 Benchmark]: TraceAbstraction took 32086.50ms. Allocated memory was 215.0MB in the beginning and 475.0MB in the end (delta: 260.0MB). Free memory was 178.3MB in the beginning and 410.0MB in the end (delta: -231.7MB). Peak memory consumption was 275.0MB. Max. memory is 8.0GB. [2022-03-18 21:59:25,487 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 215.0MB. Free memory is still 178.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 192.09ms. Allocated memory is still 215.0MB. Free memory was 161.8MB in the beginning and 191.1MB in the end (delta: -29.3MB). Peak memory consumption was 13.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.59ms. Allocated memory is still 215.0MB. Free memory was 191.1MB in the beginning and 189.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 196.71ms. Allocated memory is still 215.0MB. Free memory was 189.6MB in the beginning and 180.2MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 12.69ms. Allocated memory is still 215.0MB. Free memory was 180.1MB in the beginning and 178.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 32086.50ms. Allocated memory was 215.0MB in the beginning and 475.0MB in the end (delta: 260.0MB). Free memory was 178.3MB in the beginning and 410.0MB in the end (delta: -231.7MB). Peak memory consumption was 275.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 32.0s, OverallIterations: 12, TraceHistogramMax: 101, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 11.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 6.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 745 SdHoareTripleChecker+Valid, 3.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 744 mSDsluCounter, 700 SdHoareTripleChecker+Invalid, 2.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 455 mSDsCounter, 1197 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9892 IncrementalHoareTripleChecker+Invalid, 11089 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1197 mSolverCounterUnsat, 245 mSDtfsCounter, 9892 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2233 GetRequests, 1415 SyntacticMatches, 8 SemanticMatches, 810 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13368 ImplicationChecksByTransitivity, 14.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=214occurred in iteration=11, InterpolantAutomatonStates: 431, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 2649 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 18 PreInvPairs, 120 NumberOfFragments, 676 HoareAnnotationTreeSize, 18 FomulaSimplifications, 2460 FormulaSimplificationTreeSizeReduction, 3.1s HoareSimplificationTime, 7 FomulaSimplificationsInter, 13500 FormulaSimplificationTreeSizeReductionInter, 3.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 11.3s InterpolantComputationTime, 1665 NumberOfCodeBlocks, 1583 NumberOfCodeBlocksAsserted, 93 NumberOfCheckSat, 2350 ConstructedInterpolants, 0 QuantifiedInterpolants, 8130 SizeOfPredicates, 1 NumberOfNonLiveVariables, 1685 ConjunctsInSsa, 251 ConjunctsInUnsatCore, 30 InterpolantComputations, 3 PerfectInterpolantSequences, 26464/68563 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((y <= 69 && 69 <= y) && x < 70) && 69 <= x) || (((x < 76 && 75 <= y) && 75 <= x) && y <= 75)) || (((80 <= x && y <= 80) && x < 81) && 80 <= y)) || (((58 <= x && x <= 58) && 58 <= y) && y <= 58)) || (((x < 89 && y <= 88) && 88 <= y) && 88 <= x)) || (((x < 85 && 84 <= x) && y <= 84) && 84 <= y)) || (((77 <= y && x < 78) && y <= 77) && 77 <= x)) || (((66 <= y && y <= 66) && 66 <= x) && x < 67)) || (((x < 97 && 96 <= y) && 96 <= x) && y <= 96)) || (((74 <= x && 74 <= y) && y <= 74) && x < 75)) || (((x < 77 && 76 <= x) && y <= 76) && 76 <= y)) || (((x < 94 && 93 <= y) && y <= 93) && 93 <= x)) || (((y <= 53 && 53 <= x) && 53 <= y) && x <= 53)) || (((78 <= y && 78 <= x) && x < 79) && y <= 78)) || (((92 <= y && 92 <= x) && y <= 92) && x < 93)) || (((y <= 56 && x <= 56) && 56 <= x) && 56 <= y)) || (((51 <= y && x <= 51) && 51 <= x) && y <= 51)) || (((90 <= y && y <= 90) && 90 <= x) && x < 91)) || (((70 <= x && 70 <= y) && y <= 70) && x < 71)) || (((y <= 68 && 68 <= y) && 68 <= x) && x < 69)) || (((x <= 55 && 55 <= y) && y <= 55) && 55 <= x)) || (((81 <= x && y <= 81) && x < 82) && 81 <= y)) || (((x <= 63 && 63 <= x) && 63 <= y) && y <= 63)) || (((65 <= y && y <= 65) && 65 <= x) && x < 66)) || (((x <= 60 && 60 <= y) && y <= 60) && 60 <= x)) || (((97 <= y && x < 98) && 97 <= x) && y <= 97)) || (((y <= 85 && 85 <= x) && 85 <= y) && x < 86)) || (((y <= 59 && x <= 59) && 59 <= x) && 59 <= y)) || (((86 <= y && x < 87) && 86 <= x) && y <= 86)) || (((54 <= y && x <= 54) && 54 <= x) && y <= 54)) || (((y <= 72 && x < 73) && 72 <= x) && 72 <= y)) || (((91 <= y && y <= 91) && 91 <= x) && x < 92)) || (((y <= 52 && x <= 52) && 52 <= x) && 52 <= y)) || (((62 <= x && y <= 62) && x <= 62) && 62 <= y)) || (((y <= 57 && 57 <= x) && 57 <= y) && x <= 57)) || (((y <= 71 && 71 <= y) && x < 72) && 71 <= x)) || (((79 <= x && x < 80) && y <= 79) && 79 <= y)) || (((x <= 61 && y <= 61) && 61 <= x) && 61 <= y)) || (((x < 100 && 99 <= x) && y <= 99) && 99 <= y)) || (((64 <= y && y <= 64) && x <= 64) && 64 <= x)) || (((y <= 73 && 73 <= x) && x < 74) && 73 <= y)) || (((82 <= x && 82 <= y) && y <= 82) && x < 83)) || (((y <= 94 && 94 <= x) && 94 <= y) && x < 95)) || ((50 <= y && x <= 50) && y <= 50)) || (((x < 99 && 98 <= y) && 98 <= x) && y <= 98)) || (((83 <= x && x < 84) && 83 <= y) && y <= 83)) || (((x < 88 && y <= 87) && 87 <= x) && 87 <= y)) || (((y <= 67 && 67 <= x) && 67 <= y) && x < 68)) || ((99 < y && 100 <= x) && y <= 100)) || (((95 <= x && x < 96) && 95 <= y) && y <= 95)) || (((y <= 89 && 89 <= y) && 89 <= x) && x < 90) RESULT: Ultimate proved your program to be correct! [2022-03-18 21:59:25,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...