/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/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 08:24:05,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 08:24:05,909 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 08:24:05,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 08:24:05,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 08:24:05,931 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 08:24:05,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 08:24:05,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 08:24:05,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 08:24:05,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 08:24:05,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 08:24:05,936 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-03-20 08:24:05,950 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 08:24:05,951 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 08:24:05,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 08:24:05,952 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 08:24:05,966 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 08:24:05,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 08:24:05,966 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 08:24:05,966 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 08:24:05,967 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 08:24:05,967 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 08:24:05,967 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 08:24:05,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 08:24:05,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 08:24:05,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 08:24:05,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 08:24:05,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 08:24:05,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 08:24:05,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 08:24:05,968 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 08:24:05,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 08:24:05,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 08:24:05,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 08:24:05,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 08:24:05,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:24:05,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 08:24:05,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 08:24:05,969 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 08:24:05,969 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 08:24:05,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 08:24:05,970 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 08:24:05,970 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 08:24:05,979 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 08:24:05,980 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 08:24:05,981 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 08:24:06,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 08:24:06,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 08:24:06,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 08:24:06,249 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 08:24:06,250 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 08:24:06,251 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2022-03-20 08:24:06,303 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b71c8fe4/ef0b1a36ab0f4001b9fb34afef8deb9c/FLAG075d83c84 [2022-03-20 08:24:06,658 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 08:24:06,658 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/afnp2014.i [2022-03-20 08:24:06,662 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b71c8fe4/ef0b1a36ab0f4001b9fb34afef8deb9c/FLAG075d83c84 [2022-03-20 08:24:07,088 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b71c8fe4/ef0b1a36ab0f4001b9fb34afef8deb9c [2022-03-20 08:24:07,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 08:24:07,091 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 08:24:07,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 08:24:07,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 08:24:07,100 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 08:24:07,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:24:07" (1/1) ... [2022-03-20 08:24:07,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50d94e5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:24:07, skipping insertion in model container [2022-03-20 08:24:07,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:24:07" (1/1) ... [2022-03-20 08:24:07,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 08:24:07,116 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 08:24:07,274 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/afnp2014.i[895,908] [2022-03-20 08:24:07,281 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:24:07,285 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 08:24:07,293 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/afnp2014.i[895,908] [2022-03-20 08:24:07,295 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:24:07,303 INFO L208 MainTranslator]: Completed translation [2022-03-20 08:24:07,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:24:07 WrapperNode [2022-03-20 08:24:07,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 08:24:07,305 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 08:24:07,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 08:24:07,305 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 08:24:07,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:24:07" (1/1) ... [2022-03-20 08:24:07,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:24:07" (1/1) ... [2022-03-20 08:24:07,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:24:07" (1/1) ... [2022-03-20 08:24:07,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:24:07" (1/1) ... [2022-03-20 08:24:07,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:24:07" (1/1) ... [2022-03-20 08:24:07,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:24:07" (1/1) ... [2022-03-20 08:24:07,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:24:07" (1/1) ... [2022-03-20 08:24:07,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 08:24:07,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 08:24:07,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 08:24:07,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 08:24:07,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:24:07" (1/1) ... [2022-03-20 08:24:07,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:24:07,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:24:07,381 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 08:24:07,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 08:24:07,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 08:24:07,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 08:24:07,424 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 08:24:07,424 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 08:24:07,424 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 08:24:07,425 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 08:24:07,425 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 08:24:07,425 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 08:24:07,426 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 08:24:07,426 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 08:24:07,426 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 08:24:07,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 08:24:07,426 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 08:24:07,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 08:24:07,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 08:24:07,426 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 08:24:07,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 08:24:07,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 08:24:07,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 08:24:07,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 08:24:07,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 08:24:07,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 08:24:07,476 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 08:24:07,477 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 08:24:07,598 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 08:24:07,601 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 08:24:07,601 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 08:24:07,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:24:07 BoogieIcfgContainer [2022-03-20 08:24:07,603 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 08:24:07,603 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 08:24:07,603 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 08:24:07,604 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 08:24:07,606 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:24:07" (1/1) ... [2022-03-20 08:24:07,607 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 08:24:07,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:24:07 BasicIcfg [2022-03-20 08:24:07,615 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 08:24:07,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 08:24:07,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 08:24:07,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 08:24:07,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:24:07" (1/4) ... [2022-03-20 08:24:07,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61155f72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:24:07, skipping insertion in model container [2022-03-20 08:24:07,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:24:07" (2/4) ... [2022-03-20 08:24:07,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61155f72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:24:07, skipping insertion in model container [2022-03-20 08:24:07,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:24:07" (3/4) ... [2022-03-20 08:24:07,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61155f72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:24:07, skipping insertion in model container [2022-03-20 08:24:07,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:24:07" (4/4) ... [2022-03-20 08:24:07,636 INFO L111 eAbstractionObserver]: Analyzing ICFG afnp2014.iqvasr [2022-03-20 08:24:07,639 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 08:24:07,640 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 08:24:07,684 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 08:24:07,690 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 08:24:07,690 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 08:24:07,711 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 08:24:07,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 08:24:07,714 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:24:07,714 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:24:07,715 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:24:07,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:24:07,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1500993422, now seen corresponding path program 1 times [2022-03-20 08:24:07,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:24:07,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007384814] [2022-03-20 08:24:07,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:24:07,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:24:07,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:24:07,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:24:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:24:07,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:24:07,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:24:07,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007384814] [2022-03-20 08:24:07,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007384814] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:24:07,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:24:07,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 08:24:07,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948146461] [2022-03-20 08:24:07,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:24:07,825 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 08:24:07,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:24:07,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 08:24:07,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:24:07,843 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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) [2022-03-20 08:24:07,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:24:07,865 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-03-20 08:24:07,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 08:24:07,867 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 [2022-03-20 08:24:07,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:24:07,871 INFO L225 Difference]: With dead ends: 33 [2022-03-20 08:24:07,871 INFO L226 Difference]: Without dead ends: 14 [2022-03-20 08:24:07,873 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:24:07,875 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:24:07,875 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:24:07,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-20 08:24:07,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-20 08:24:07,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:24:07,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-03-20 08:24:07,895 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-03-20 08:24:07,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:24:07,895 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-03-20 08:24:07,895 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) [2022-03-20 08:24:07,895 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-03-20 08:24:07,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-20 08:24:07,896 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:24:07,896 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:24:07,896 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 08:24:07,896 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:24:07,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:24:07,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1571147607, now seen corresponding path program 1 times [2022-03-20 08:24:07,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:24:07,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843418846] [2022-03-20 08:24:07,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:24:07,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:24:07,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:24:08,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:24:08,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:24:08,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:24:08,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:24:08,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843418846] [2022-03-20 08:24:08,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843418846] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:24:08,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:24:08,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 08:24:08,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63085514] [2022-03-20 08:24:08,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:24:08,021 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 08:24:08,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:24:08,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 08:24:08,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 08:24:08,021 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:24:08,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:24:08,068 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-03-20 08:24:08,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 08:24:08,069 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-20 08:24:08,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:24:08,069 INFO L225 Difference]: With dead ends: 22 [2022-03-20 08:24:08,070 INFO L226 Difference]: Without dead ends: 17 [2022-03-20 08:24:08,070 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-20 08:24:08,071 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:24:08,071 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 29 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:24:08,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-20 08:24:08,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-20 08:24:08,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:24:08,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-20 08:24:08,075 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2022-03-20 08:24:08,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:24:08,075 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-20 08:24:08,075 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:24:08,075 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-20 08:24:08,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-20 08:24:08,076 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:24:08,076 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:24:08,076 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 08:24:08,076 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:24:08,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:24:08,077 INFO L85 PathProgramCache]: Analyzing trace with hash 271190683, now seen corresponding path program 1 times [2022-03-20 08:24:08,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:24:08,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529765764] [2022-03-20 08:24:08,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:24:08,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:24:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:24:08,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:24:08,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:24:08,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:24:08,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:24:08,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529765764] [2022-03-20 08:24:08,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529765764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:24:08,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161718611] [2022-03-20 08:24:08,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:24:08,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:24:08,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:24:08,141 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:24:08,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 08:24:08,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:24:08,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 08:24:08,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:24:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:24:08,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:24:08,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:24:08,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161718611] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:24:08,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:24:08,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-03-20 08:24:08,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537423869] [2022-03-20 08:24:08,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:24:08,341 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 08:24:08,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:24:08,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 08:24:08,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-20 08:24:08,342 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 7 states have internal predecessors, (19), 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) [2022-03-20 08:24:08,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:24:08,462 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-03-20 08:24:08,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 08:24:08,462 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 7 states have internal predecessors, (19), 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 16 [2022-03-20 08:24:08,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:24:08,463 INFO L225 Difference]: With dead ends: 25 [2022-03-20 08:24:08,464 INFO L226 Difference]: Without dead ends: 20 [2022-03-20 08:24:08,467 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-03-20 08:24:08,469 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:24:08,470 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 39 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:24:08,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-20 08:24:08,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-20 08:24:08,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:24:08,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-03-20 08:24:08,476 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 16 [2022-03-20 08:24:08,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:24:08,478 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-03-20 08:24:08,478 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 7 states have internal predecessors, (19), 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) [2022-03-20 08:24:08,478 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-03-20 08:24:08,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 08:24:08,479 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:24:08,479 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:24:08,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 08:24:08,693 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:24:08,693 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:24:08,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:24:08,695 INFO L85 PathProgramCache]: Analyzing trace with hash 974575831, now seen corresponding path program 2 times [2022-03-20 08:24:08,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:24:08,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663560775] [2022-03-20 08:24:08,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:24:08,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:24:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:24:08,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:24:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:24:08,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:24:08,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:24:08,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663560775] [2022-03-20 08:24:08,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663560775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:24:08,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152750323] [2022-03-20 08:24:08,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:24:08,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:24:08,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:24:08,808 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:24:08,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 08:24:08,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:24:08,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:24:08,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 08:24:08,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:24:08,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:24:08,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:24:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:24:08,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152750323] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:24:08,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:24:08,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-03-20 08:24:08,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584496384] [2022-03-20 08:24:08,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:24:08,969 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 08:24:08,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:24:08,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 08:24:08,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-20 08:24:08,970 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 9 states have internal predecessors, (26), 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) [2022-03-20 08:24:09,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:24:09,027 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-03-20 08:24:09,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 08:24:09,028 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 9 states have internal predecessors, (26), 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 19 [2022-03-20 08:24:09,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:24:09,028 INFO L225 Difference]: With dead ends: 20 [2022-03-20 08:24:09,028 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 08:24:09,028 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-20 08:24:09,029 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:24:09,029 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 47 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:24:09,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 08:24:09,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 08:24:09,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 08:24:09,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 08:24:09,030 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2022-03-20 08:24:09,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:24:09,031 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 08:24:09,031 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 9 states have internal predecessors, (26), 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) [2022-03-20 08:24:09,031 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 08:24:09,031 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 08:24:09,033 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 08:24:09,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 08:24:09,250 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 08:24:09,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 08:24:09,282 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|)) [2022-03-20 08:24:09,282 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 08:24:09,282 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 08:24:09,282 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 08:24:09,283 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 08:24:09,283 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 08:24:09,283 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 08:24:09,285 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 24 33) the Hoare annotation is: true [2022-03-20 08:24:09,285 INFO L878 garLoopResultBuilder]: At program point L27-5(lines 27 30) the Hoare annotation is: (and (<= 0 main_~y~0) (<= 1 main_~x~0) (<= main_~y~0 main_~x~0)) [2022-03-20 08:24:09,285 INFO L878 garLoopResultBuilder]: At program point L27-6(lines 27 30) the Hoare annotation is: (<= main_~y~0 main_~x~0) [2022-03-20 08:24:09,285 INFO L882 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2022-03-20 08:24:09,285 INFO L882 garLoopResultBuilder]: For program point L31(line 31) no Hoare annotation was computed. [2022-03-20 08:24:09,285 INFO L882 garLoopResultBuilder]: For program point L27-3(lines 27 30) no Hoare annotation was computed. [2022-03-20 08:24:09,286 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 24 33) no Hoare annotation was computed. [2022-03-20 08:24:09,286 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 24 33) no Hoare annotation was computed. [2022-03-20 08:24:09,286 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-03-20 08:24:09,286 INFO L882 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-03-20 08:24:09,286 INFO L882 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2022-03-20 08:24:09,286 INFO L882 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2022-03-20 08:24:09,286 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2022-03-20 08:24:09,286 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2022-03-20 08:24:09,288 INFO L719 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2022-03-20 08:24:09,290 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 08:24:09,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:24:09 BasicIcfg [2022-03-20 08:24:09,300 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 08:24:09,300 INFO L158 Benchmark]: Toolchain (without parser) took 2209.27ms. Allocated memory was 209.7MB in the beginning and 259.0MB in the end (delta: 49.3MB). Free memory was 155.3MB in the beginning and 131.2MB in the end (delta: 24.1MB). Peak memory consumption was 73.3MB. Max. memory is 8.0GB. [2022-03-20 08:24:09,307 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 209.7MB. Free memory is still 171.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 08:24:09,307 INFO L158 Benchmark]: CACSL2BoogieTranslator took 207.45ms. Allocated memory was 209.7MB in the beginning and 259.0MB in the end (delta: 49.3MB). Free memory was 155.2MB in the beginning and 231.8MB in the end (delta: -76.7MB). Peak memory consumption was 7.6MB. Max. memory is 8.0GB. [2022-03-20 08:24:09,308 INFO L158 Benchmark]: Boogie Preprocessor took 16.99ms. Allocated memory is still 259.0MB. Free memory was 231.8MB in the beginning and 230.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 08:24:09,308 INFO L158 Benchmark]: RCFGBuilder took 280.46ms. Allocated memory is still 259.0MB. Free memory was 230.3MB in the beginning and 219.9MB in the end (delta: 10.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-20 08:24:09,308 INFO L158 Benchmark]: IcfgTransformer took 27.87ms. Allocated memory is still 259.0MB. Free memory was 219.9MB in the beginning and 218.8MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 08:24:09,308 INFO L158 Benchmark]: TraceAbstraction took 1667.56ms. Allocated memory is still 259.0MB. Free memory was 218.3MB in the beginning and 131.2MB in the end (delta: 87.1MB). Peak memory consumption was 87.0MB. Max. memory is 8.0GB. [2022-03-20 08:24:09,309 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 209.7MB. Free memory is still 171.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 207.45ms. Allocated memory was 209.7MB in the beginning and 259.0MB in the end (delta: 49.3MB). Free memory was 155.2MB in the beginning and 231.8MB in the end (delta: -76.7MB). Peak memory consumption was 7.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 16.99ms. Allocated memory is still 259.0MB. Free memory was 231.8MB in the beginning and 230.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 280.46ms. Allocated memory is still 259.0MB. Free memory was 230.3MB in the beginning and 219.9MB in the end (delta: 10.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 27.87ms. Allocated memory is still 259.0MB. Free memory was 219.9MB in the beginning and 218.8MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 1667.56ms. Allocated memory is still 259.0MB. Free memory was 218.3MB in the beginning and 131.2MB in the end (delta: 87.1MB). Peak memory consumption was 87.0MB. 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, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.6s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 72 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 71 mSDsluCounter, 139 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 84 mSDsCounter, 22 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 128 IncrementalHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 22 mSolverCounterUnsat, 55 mSDtfsCounter, 128 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 107 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 10 PreInvPairs, 13 NumberOfFragments, 24 HoareAnnotationTreeSize, 10 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 24 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 94 NumberOfCodeBlocks, 94 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 121 ConstructedInterpolants, 0 QuantifiedInterpolants, 331 SizeOfPredicates, 2 NumberOfNonLiveVariables, 138 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 0/36 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: (0 <= y && 1 <= x) && y <= x RESULT: Ultimate proved your program to be correct! [2022-03-20 08:24:09,349 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...