/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-new/half.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 08:32:52,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 08:32:52,064 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 08:32:52,091 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 08:32:52,099 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 08:32:52,100 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 08:32:52,101 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 08:32:52,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 08:32:52,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 08:32:52,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 08:32:52,105 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 08:32:52,106 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 08:32:52,108 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 08:32:52,108 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 08:32:52,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 08:32:52,111 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 08:32:52,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 08:32:52,114 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 08:32:52,121 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 08:32:52,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 08:32:52,122 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 08:32:52,123 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 08:32:52,142 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 08:32:52,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 08:32:52,143 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 08:32:52,143 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 08:32:52,144 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 08:32:52,144 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 08:32:52,144 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 08:32:52,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 08:32:52,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 08:32:52,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 08:32:52,145 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 08:32:52,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 08:32:52,145 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 08:32:52,145 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 08:32:52,145 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 08:32:52,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 08:32:52,146 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 08:32:52,146 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 08:32:52,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 08:32:52,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:32:52,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 08:32:52,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 08:32:52,147 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 08:32:52,147 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 08:32:52,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 08:32:52,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 08:32:52,147 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 08:32:52,147 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 08:32:52,148 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 08:32:52,148 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 08:32:52,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 08:32:52,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 08:32:52,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 08:32:52,421 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 08:32:52,421 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 08:32:52,423 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i [2022-03-20 08:32:52,484 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c94b902d9/9e32c75506bc4584b61cbf099a780744/FLAG74c788e28 [2022-03-20 08:32:52,847 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 08:32:52,847 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half.i [2022-03-20 08:32:52,853 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c94b902d9/9e32c75506bc4584b61cbf099a780744/FLAG74c788e28 [2022-03-20 08:32:53,251 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c94b902d9/9e32c75506bc4584b61cbf099a780744 [2022-03-20 08:32:53,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 08:32:53,256 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 08:32:53,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 08:32:53,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 08:32:53,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 08:32:53,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:32:53" (1/1) ... [2022-03-20 08:32:53,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f0d3571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:32:53, skipping insertion in model container [2022-03-20 08:32:53,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:32:53" (1/1) ... [2022-03-20 08:32:53,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 08:32:53,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 08:32:53,419 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-new/half.i[891,904] [2022-03-20 08:32:53,452 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:32:53,458 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 08:32:53,468 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-new/half.i[891,904] [2022-03-20 08:32:53,471 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:32:53,481 INFO L208 MainTranslator]: Completed translation [2022-03-20 08:32:53,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:32:53 WrapperNode [2022-03-20 08:32:53,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 08:32:53,482 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 08:32:53,483 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 08:32:53,483 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 08:32:53,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:32:53" (1/1) ... [2022-03-20 08:32:53,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:32:53" (1/1) ... [2022-03-20 08:32:53,497 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:32:53" (1/1) ... [2022-03-20 08:32:53,498 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:32:53" (1/1) ... [2022-03-20 08:32:53,501 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:32:53" (1/1) ... [2022-03-20 08:32:53,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:32:53" (1/1) ... [2022-03-20 08:32:53,505 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:32:53" (1/1) ... [2022-03-20 08:32:53,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 08:32:53,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 08:32:53,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 08:32:53,507 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 08:32:53,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:32:53" (1/1) ... [2022-03-20 08:32:53,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:32:53,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:32:53,534 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 08:32:53,546 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 08:32:53,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 08:32:53,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 08:32:53,570 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 08:32:53,570 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 08:32:53,570 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 08:32:53,571 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 08:32:53,571 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 08:32:53,571 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 08:32:53,572 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 08:32:53,572 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 08:32:53,572 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 08:32:53,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 08:32:53,573 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 08:32:53,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 08:32:53,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 08:32:53,573 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 08:32:53,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 08:32:53,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 08:32:53,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 08:32:53,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 08:32:53,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 08:32:53,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 08:32:53,628 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 08:32:53,629 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 08:32:53,786 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 08:32:53,791 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 08:32:53,791 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 08:32:53,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:32:53 BoogieIcfgContainer [2022-03-20 08:32:53,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 08:32:53,793 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 08:32:53,793 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 08:32:53,794 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 08:32:53,809 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:32:53" (1/1) ... [2022-03-20 08:32:53,811 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 08:32:53,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:32:53 BasicIcfg [2022-03-20 08:32:53,821 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 08:32:53,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 08:32:53,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 08:32:53,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 08:32:53,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:32:53" (1/4) ... [2022-03-20 08:32:53,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af5b309 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:32:53, skipping insertion in model container [2022-03-20 08:32:53,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:32:53" (2/4) ... [2022-03-20 08:32:53,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af5b309 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:32:53, skipping insertion in model container [2022-03-20 08:32:53,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:32:53" (3/4) ... [2022-03-20 08:32:53,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af5b309 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:32:53, skipping insertion in model container [2022-03-20 08:32:53,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:32:53" (4/4) ... [2022-03-20 08:32:53,844 INFO L111 eAbstractionObserver]: Analyzing ICFG half.iqvasr [2022-03-20 08:32:53,850 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 08:32:53,850 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 08:32:53,902 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 08:32:53,909 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 08:32:53,909 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 08:32:53,924 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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 08:32:53,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 08:32:53,928 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:32:53,928 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:32:53,929 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:32:53,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:32:53,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1612362112, now seen corresponding path program 1 times [2022-03-20 08:32:53,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:32:53,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281222804] [2022-03-20 08:32:53,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:32:53,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:32:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:32:54,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:32:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:32:54,109 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 08:32:54,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:32:54,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281222804] [2022-03-20 08:32:54,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281222804] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:32:54,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:32:54,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 08:32:54,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989404431] [2022-03-20 08:32:54,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:32:54,116 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 08:32:54,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:32:54,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 08:32:54,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:32:54,144 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 08:32:54,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:32:54,190 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-03-20 08:32:54,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 08:32:54,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2022-03-20 08:32:54,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:32:54,200 INFO L225 Difference]: With dead ends: 34 [2022-03-20 08:32:54,200 INFO L226 Difference]: Without dead ends: 15 [2022-03-20 08:32:54,203 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 08:32:54,206 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 26 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 08:32:54,207 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:32:54,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-20 08:32:54,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-20 08:32:54,236 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) [2022-03-20 08:32:54,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-03-20 08:32:54,237 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2022-03-20 08:32:54,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:32:54,238 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-03-20 08:32:54,239 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 08:32:54,239 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-03-20 08:32:54,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 08:32:54,239 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:32:54,240 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:32:54,240 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 08:32:54,241 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:32:54,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:32:54,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1611438591, now seen corresponding path program 1 times [2022-03-20 08:32:54,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:32:54,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590191769] [2022-03-20 08:32:54,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:32:54,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:32:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:32:54,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:32:54,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:32:54,443 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 08:32:54,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:32:54,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590191769] [2022-03-20 08:32:54,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590191769] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:32:54,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:32:54,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 08:32:54,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211150722] [2022-03-20 08:32:54,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:32:54,446 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 08:32:54,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:32:54,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 08:32:54,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-03-20 08:32:54,448 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 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 08:32:54,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:32:54,601 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-03-20 08:32:54,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 08:32:54,602 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 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 12 [2022-03-20 08:32:54,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:32:54,605 INFO L225 Difference]: With dead ends: 27 [2022-03-20 08:32:54,605 INFO L226 Difference]: Without dead ends: 21 [2022-03-20 08:32:54,610 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-03-20 08:32:54,612 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:32:54,615 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 28 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:32:54,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-20 08:32:54,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2022-03-20 08:32:54,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:32:54,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-03-20 08:32:54,625 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2022-03-20 08:32:54,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:32:54,625 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-03-20 08:32:54,625 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 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 08:32:54,625 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-03-20 08:32:54,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 08:32:54,626 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:32:54,626 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:32:54,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 08:32:54,628 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:32:54,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:32:54,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1133798095, now seen corresponding path program 1 times [2022-03-20 08:32:54,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:32:54,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469714943] [2022-03-20 08:32:54,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:32:54,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:32:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:32:54,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:32:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:32:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:32:54,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:32:54,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469714943] [2022-03-20 08:32:54,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469714943] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:32:54,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791931405] [2022-03-20 08:32:54,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:32:54,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:32:54,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:32:54,764 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 08:32:54,765 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 08:32:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:32:54,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 08:32:54,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:32:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:32:54,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:32:55,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:32:55,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791931405] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:32:55,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:32:55,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 13 [2022-03-20 08:32:55,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178032608] [2022-03-20 08:32:55,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:32:55,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 08:32:55,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:32:55,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 08:32:55,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-03-20 08:32:55,091 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:32:55,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:32:55,315 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2022-03-20 08:32:55,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 08:32:55,315 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-20 08:32:55,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:32:55,316 INFO L225 Difference]: With dead ends: 38 [2022-03-20 08:32:55,316 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 08:32:55,317 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-03-20 08:32:55,318 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:32:55,318 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 44 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:32:55,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 08:32:55,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2022-03-20 08:32:55,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:32:55,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-03-20 08:32:55,322 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2022-03-20 08:32:55,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:32:55,323 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-03-20 08:32:55,323 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:32:55,323 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-03-20 08:32:55,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 08:32:55,324 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:32:55,324 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:32:55,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 08:32:55,531 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 08:32:55,532 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:32:55,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:32:55,532 INFO L85 PathProgramCache]: Analyzing trace with hash 600163970, now seen corresponding path program 1 times [2022-03-20 08:32:55,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:32:55,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484025958] [2022-03-20 08:32:55,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:32:55,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:32:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:32:55,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:32:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:32:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:32:55,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:32:55,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484025958] [2022-03-20 08:32:55,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484025958] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:32:55,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500900695] [2022-03-20 08:32:55,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:32:55,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:32:55,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:32:55,735 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 08:32:55,745 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 08:32:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:32:55,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 08:32:55,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:32:55,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:32:55,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:32:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:32:56,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500900695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:32:56,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:32:56,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-03-20 08:32:56,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779325023] [2022-03-20 08:32:56,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:32:56,324 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 08:32:56,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:32:56,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 08:32:56,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-03-20 08:32:56,328 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 25 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:32:57,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:32:57,090 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2022-03-20 08:32:57,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 08:32:57,091 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-03-20 08:32:57,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:32:57,091 INFO L225 Difference]: With dead ends: 47 [2022-03-20 08:32:57,091 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 08:32:57,092 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=295, Invalid=1511, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 08:32:57,093 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 55 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:32:57,093 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 82 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 08:32:57,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 08:32:57,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2022-03-20 08:32:57,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:32:57,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-03-20 08:32:57,100 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 18 [2022-03-20 08:32:57,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:32:57,100 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-03-20 08:32:57,101 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:32:57,101 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-03-20 08:32:57,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 08:32:57,101 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:32:57,101 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:32:57,124 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 08:32:57,315 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 08:32:57,316 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:32:57,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:32:57,316 INFO L85 PathProgramCache]: Analyzing trace with hash 249106799, now seen corresponding path program 2 times [2022-03-20 08:32:57,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:32:57,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843452405] [2022-03-20 08:32:57,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:32:57,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:32:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:32:57,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:32:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:32:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 08:32:57,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:32:57,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843452405] [2022-03-20 08:32:57,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843452405] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:32:57,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619575351] [2022-03-20 08:32:57,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:32:57,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:32:57,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:32:57,501 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:32:57,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 08:32:57,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:32:57,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:32:57,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 08:32:57,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:32:57,766 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:32:57,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:32:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 08:32:57,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619575351] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:32:57,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:32:57,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 6] total 25 [2022-03-20 08:32:57,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710522647] [2022-03-20 08:32:57,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:32:57,941 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 08:32:57,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:32:57,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 08:32:57,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-20 08:32:57,942 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:32:58,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:32:58,419 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-03-20 08:32:58,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 08:32:58,421 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 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 [2022-03-20 08:32:58,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:32:58,421 INFO L225 Difference]: With dead ends: 49 [2022-03-20 08:32:58,422 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 08:32:58,423 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=235, Invalid=1405, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 08:32:58,424 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 41 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:32:58,424 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 78 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 08:32:58,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 08:32:58,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2022-03-20 08:32:58,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:32:58,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-03-20 08:32:58,433 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 27 [2022-03-20 08:32:58,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:32:58,433 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-03-20 08:32:58,433 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:32:58,433 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-03-20 08:32:58,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 08:32:58,434 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:32:58,434 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:32:58,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 08:32:58,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:32:58,648 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:32:58,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:32:58,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1415796412, now seen corresponding path program 3 times [2022-03-20 08:32:58,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:32:58,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965981892] [2022-03-20 08:32:58,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:32:58,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:32:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:32:58,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:32:58,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:32:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 08:32:58,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:32:58,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965981892] [2022-03-20 08:32:58,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965981892] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:32:58,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311373479] [2022-03-20 08:32:58,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 08:32:58,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:32:58,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:32:58,892 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:32:58,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 08:32:58,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-20 08:32:58,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:32:58,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 08:32:58,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:32:59,360 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:32:59,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:33:00,160 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:33:00,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311373479] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:33:00,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:33:00,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 40 [2022-03-20 08:33:00,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637592338] [2022-03-20 08:33:00,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:33:00,161 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 08:33:00,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:33:00,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 08:33:00,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1324, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 08:33:00,163 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 40 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 37 states have internal predecessors, (62), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:33:00,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:33:00,737 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2022-03-20 08:33:00,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 08:33:00,738 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 37 states have internal predecessors, (62), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-20 08:33:00,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:33:00,738 INFO L225 Difference]: With dead ends: 39 [2022-03-20 08:33:00,738 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 08:33:00,740 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=579, Invalid=3203, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 08:33:00,741 INFO L913 BasicCegarLoop]: 8 mSDtfsCounter, 82 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:33:00,741 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 85 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 08:33:00,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 08:33:00,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 08:33:00,742 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 08:33:00,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 08:33:00,742 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2022-03-20 08:33:00,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:33:00,742 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 08:33:00,742 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 37 states have internal predecessors, (62), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:33:00,742 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 08:33:00,743 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 08:33:00,745 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 08:33:00,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 08:33:00,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:33:00,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 08:33:01,196 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 08:33:01,196 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 08:33:01,196 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 08:33:01,197 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 08:33:01,197 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 08:33:01,197 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 08:33:01,197 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 08:33:01,197 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 24 36) the Hoare annotation is: true [2022-03-20 08:33:01,197 INFO L882 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2022-03-20 08:33:01,197 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 24 36) no Hoare annotation was computed. [2022-03-20 08:33:01,197 INFO L878 garLoopResultBuilder]: At program point L29-3(lines 29 33) the Hoare annotation is: (let ((.cse0 (* main_~n~0 2))) (or (and (= main_~n~0 0) (= main_~i~0 0)) (let ((.cse1 (+ main_~i~0 1))) (and (<= .cse0 .cse1) (< main_~i~0 (* main_~k~0 2)) (<= .cse1 .cse0))) (and (<= main_~i~0 .cse0) (< main_~n~0 (+ main_~k~0 1)) (<= .cse0 main_~i~0)))) [2022-03-20 08:33:01,197 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 24 36) no Hoare annotation was computed. [2022-03-20 08:33:01,198 INFO L878 garLoopResultBuilder]: At program point L29-4(lines 29 33) the Hoare annotation is: (let ((.cse0 (= main_~n~0 main_~k~0))) (or (and (<= main_~k~0 0) (or (not (= main_~k~0 0)) .cse0)) (let ((.cse4 (* (- 1) main_~i~0))) (let ((.cse2 (div (+ .cse4 (- 2)) (- 2))) (.cse3 (div (+ (- 1) .cse4) (- 2)))) (let ((.cse1 (<= .cse2 .cse3))) (and .cse0 (or .cse1 (<= .cse2 (+ main_~n~0 1))) (or .cse1 (<= main_~n~0 .cse3) (< .cse2 1)))))))) [2022-03-20 08:33:01,198 INFO L882 garLoopResultBuilder]: For program point L30(lines 30 32) no Hoare annotation was computed. [2022-03-20 08:33:01,198 INFO L882 garLoopResultBuilder]: For program point L34(line 34) no Hoare annotation was computed. [2022-03-20 08:33:01,198 INFO L882 garLoopResultBuilder]: For program point L29-2(lines 29 33) no Hoare annotation was computed. [2022-03-20 08:33:01,198 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-03-20 08:33:01,198 INFO L882 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-03-20 08:33:01,198 INFO L882 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2022-03-20 08:33:01,198 INFO L882 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2022-03-20 08:33:01,198 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2022-03-20 08:33:01,198 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2022-03-20 08:33:01,201 INFO L719 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2022-03-20 08:33:01,202 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 08:33:01,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:33:01 BasicIcfg [2022-03-20 08:33:01,215 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 08:33:01,216 INFO L158 Benchmark]: Toolchain (without parser) took 7960.25ms. Allocated memory was 190.8MB in the beginning and 251.7MB in the end (delta: 60.8MB). Free memory was 132.5MB in the beginning and 128.4MB in the end (delta: 4.1MB). Peak memory consumption was 64.7MB. Max. memory is 8.0GB. [2022-03-20 08:33:01,216 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 190.8MB. Free memory is still 148.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 08:33:01,217 INFO L158 Benchmark]: CACSL2BoogieTranslator took 224.91ms. Allocated memory was 190.8MB in the beginning and 251.7MB in the end (delta: 60.8MB). Free memory was 132.3MB in the beginning and 222.9MB in the end (delta: -90.6MB). Peak memory consumption was 10.1MB. Max. memory is 8.0GB. [2022-03-20 08:33:01,217 INFO L158 Benchmark]: Boogie Preprocessor took 23.95ms. Allocated memory is still 251.7MB. Free memory was 222.9MB in the beginning and 220.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 08:33:01,217 INFO L158 Benchmark]: RCFGBuilder took 285.71ms. Allocated memory is still 251.7MB. Free memory was 220.8MB in the beginning and 209.8MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 08:33:01,218 INFO L158 Benchmark]: IcfgTransformer took 28.09ms. Allocated memory is still 251.7MB. Free memory was 209.8MB in the beginning and 208.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 08:33:01,218 INFO L158 Benchmark]: TraceAbstraction took 7392.85ms. Allocated memory is still 251.7MB. Free memory was 207.7MB in the beginning and 128.4MB in the end (delta: 79.3MB). Peak memory consumption was 80.3MB. Max. memory is 8.0GB. [2022-03-20 08:33:01,220 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 190.8MB. Free memory is still 148.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 224.91ms. Allocated memory was 190.8MB in the beginning and 251.7MB in the end (delta: 60.8MB). Free memory was 132.3MB in the beginning and 222.9MB in the end (delta: -90.6MB). Peak memory consumption was 10.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.95ms. Allocated memory is still 251.7MB. Free memory was 222.9MB in the beginning and 220.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 285.71ms. Allocated memory is still 251.7MB. Free memory was 220.8MB in the beginning and 209.8MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 28.09ms. Allocated memory is still 251.7MB. Free memory was 209.8MB in the beginning and 208.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 7392.85ms. Allocated memory is still 251.7MB. Free memory was 207.7MB in the beginning and 128.4MB in the end (delta: 79.3MB). Peak memory consumption was 80.3MB. 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, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.3s, OverallIterations: 6, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 249 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 248 mSDsluCounter, 343 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 268 mSDsCounter, 180 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1045 IncrementalHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 180 mSolverCounterUnsat, 75 mSDtfsCounter, 1045 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 318 GetRequests, 138 SyntacticMatches, 9 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2068 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=5, InterpolantAutomatonStates: 87, 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, 6 MinimizatonAttempts, 21 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 16 PreInvPairs, 31 NumberOfFragments, 133 HoareAnnotationTreeSize, 16 FomulaSimplifications, 27 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 1272 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 204 NumberOfCodeBlocks, 204 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 280 ConstructedInterpolants, 0 QuantifiedInterpolants, 3240 SizeOfPredicates, 14 NumberOfNonLiveVariables, 308 ConjunctsInSsa, 70 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 15/276 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: 29]: Loop Invariant Derived loop invariant: ((n == 0 && i == 0) || ((n * 2 <= i + 1 && i < k * 2) && i + 1 <= n * 2)) || ((i <= n * 2 && n < k + 1) && n * 2 <= i) RESULT: Ultimate proved your program to be correct! [2022-03-20 08:33:01,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...