/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/cggmp2005_variant.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 20:51:24,872 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 20:51:24,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 20:51:24,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 20:51:24,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 20:51:24,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 20:51:24,930 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 20:51:24,932 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 20:51:24,933 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 20:51:24,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 20:51:24,934 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 20:51:24,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 20:51:24,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 20:51:24,936 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 20:51:24,937 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 20:51:24,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 20:51:24,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 20:51:24,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 20:51:24,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 20:51:24,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 20:51:24,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 20:51:24,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 20:51:24,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 20:51:24,949 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 20:51:24,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 20:51:24,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 20:51:24,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 20:51:24,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 20:51:24,964 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 20:51:24,992 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 20:51:24,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 20:51:24,993 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 20:51:24,993 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 20:51:24,995 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 20:51:24,995 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 20:51:24,995 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 20:51:24,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 20:51:24,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 20:51:24,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 20:51:24,997 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 20:51:24,997 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 20:51:24,997 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 20:51:24,997 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 20:51:24,997 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 20:51:24,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 20:51:24,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 20:51:24,998 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 20:51:24,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 20:51:24,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 20:51:24,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 20:51:24,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 20:51:24,998 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 20:51:24,998 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 20:51:24,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 20:51:24,999 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 20:51:24,999 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 20:51:24,999 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 20:51:24,999 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 20:51:24,999 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 20:51:25,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 20:51:25,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 20:51:25,269 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 20:51:25,269 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 20:51:25,270 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 20:51:25,271 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005_variant.i [2022-02-23 20:51:25,320 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a6b5944b/5ff5a65431ad4d0d94097e7124f16511/FLAG75869710a [2022-02-23 20:51:25,723 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 20:51:25,724 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005_variant.i [2022-02-23 20:51:25,729 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a6b5944b/5ff5a65431ad4d0d94097e7124f16511/FLAG75869710a [2022-02-23 20:51:26,135 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a6b5944b/5ff5a65431ad4d0d94097e7124f16511 [2022-02-23 20:51:26,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 20:51:26,141 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 20:51:26,144 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 20:51:26,144 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 20:51:26,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 20:51:26,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 08:51:26" (1/1) ... [2022-02-23 20:51:26,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ad27eb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:51:26, skipping insertion in model container [2022-02-23 20:51:26,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 08:51:26" (1/1) ... [2022-02-23 20:51:26,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 20:51:26,167 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 20:51:26,305 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/cggmp2005_variant.i[895,908] [2022-02-23 20:51:26,314 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 20:51:26,319 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 20:51:26,333 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/cggmp2005_variant.i[895,908] [2022-02-23 20:51:26,335 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 20:51:26,346 INFO L208 MainTranslator]: Completed translation [2022-02-23 20:51:26,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:51:26 WrapperNode [2022-02-23 20:51:26,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 20:51:26,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 20:51:26,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 20:51:26,348 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 20:51:26,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:51:26" (1/1) ... [2022-02-23 20:51:26,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:51:26" (1/1) ... [2022-02-23 20:51:26,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:51:26" (1/1) ... [2022-02-23 20:51:26,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:51:26" (1/1) ... [2022-02-23 20:51:26,364 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:51:26" (1/1) ... [2022-02-23 20:51:26,367 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:51:26" (1/1) ... [2022-02-23 20:51:26,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:51:26" (1/1) ... [2022-02-23 20:51:26,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 20:51:26,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 20:51:26,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 20:51:26,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 20:51:26,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:51:26" (1/1) ... [2022-02-23 20:51:26,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 20:51:26,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:51:26,404 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) [2022-02-23 20:51:26,431 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 [2022-02-23 20:51:26,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 20:51:26,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 20:51:26,451 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 20:51:26,452 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 20:51:26,452 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 20:51:26,452 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 20:51:26,452 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 20:51:26,453 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 20:51:26,453 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-23 20:51:26,453 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-23 20:51:26,453 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 20:51:26,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 20:51:26,454 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 20:51:26,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 20:51:26,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 20:51:26,454 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 20:51:26,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 20:51:26,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 20:51:26,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 20:51:26,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 20:51:26,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 20:51:26,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 20:51:26,504 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 20:51:26,506 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 20:51:26,651 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 20:51:26,656 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 20:51:26,656 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 20:51:26,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:51:26 BoogieIcfgContainer [2022-02-23 20:51:26,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 20:51:26,658 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 20:51:26,658 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 20:51:26,676 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 20:51:26,678 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:51:26" (1/1) ... [2022-02-23 20:51:49,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 08:51:49 BasicIcfg [2022-02-23 20:51:49,798 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 20:51:49,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 20:51:49,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 20:51:49,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 20:51:49,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 08:51:26" (1/4) ... [2022-02-23 20:51:49,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78800c3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 08:51:49, skipping insertion in model container [2022-02-23 20:51:49,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:51:26" (2/4) ... [2022-02-23 20:51:49,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78800c3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 08:51:49, skipping insertion in model container [2022-02-23 20:51:49,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:51:26" (3/4) ... [2022-02-23 20:51:49,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78800c3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 08:51:49, skipping insertion in model container [2022-02-23 20:51:49,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 08:51:49" (4/4) ... [2022-02-23 20:51:49,809 INFO L111 eAbstractionObserver]: Analyzing ICFG cggmp2005_variant.iqvasr [2022-02-23 20:51:49,814 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 20:51:49,815 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 20:51:49,868 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 20:51:49,874 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 20:51:49,877 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 20:51:49,891 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 20:51:49,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-23 20:51:49,896 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:51:49,897 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:51:49,898 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:51:49,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:51:49,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1291699483, now seen corresponding path program 1 times [2022-02-23 20:51:49,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:51:49,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878323593] [2022-02-23 20:51:49,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:51:49,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:51:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:51:50,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:51:50,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:51:50,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:51:50,056 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:51:50,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878323593] [2022-02-23 20:51:50,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878323593] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:51:50,058 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:51:50,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 20:51:50,060 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021863060] [2022-02-23 20:51:50,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:51:50,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 20:51:50,064 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:51:50,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 20:51:50,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 20:51:50,092 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) 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) [2022-02-23 20:51:50,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:51:50,124 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-02-23 20:51:50,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 20:51:50,126 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 [2022-02-23 20:51:50,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:51:50,139 INFO L225 Difference]: With dead ends: 32 [2022-02-23 20:51:50,139 INFO L226 Difference]: Without dead ends: 13 [2022-02-23 20:51:50,142 INFO L932 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 [2022-02-23 20:51:50,145 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 20:51:50,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 22 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 20:51:50,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-02-23 20:51:50,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-02-23 20:51:50,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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) [2022-02-23 20:51:50,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-02-23 20:51:50,171 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2022-02-23 20:51:50,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:51:50,172 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-02-23 20:51:50,172 INFO L471 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) [2022-02-23 20:51:50,172 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-02-23 20:51:50,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-23 20:51:50,172 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:51:50,173 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:51:50,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 20:51:50,173 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:51:50,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:51:50,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1292623004, now seen corresponding path program 1 times [2022-02-23 20:51:50,174 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:51:50,174 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530727251] [2022-02-23 20:51:50,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:51:50,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:51:50,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:51:50,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:51:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:51:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:51:50,228 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:51:50,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530727251] [2022-02-23 20:51:50,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530727251] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:51:50,229 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:51:50,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 20:51:50,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984476178] [2022-02-23 20:51:50,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:51:50,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 20:51:50,230 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:51:50,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 20:51:50,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 20:51:50,231 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2022-02-23 20:51:50,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:51:50,263 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2022-02-23 20:51:50,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 20:51:50,264 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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 [2022-02-23 20:51:50,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:51:50,264 INFO L225 Difference]: With dead ends: 19 [2022-02-23 20:51:50,264 INFO L226 Difference]: Without dead ends: 14 [2022-02-23 20:51:50,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 20:51:50,266 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 20:51:50,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 19 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 20:51:50,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-02-23 20:51:50,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-02-23 20:51:50,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:51:50,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-02-23 20:51:50,270 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-02-23 20:51:50,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:51:50,271 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-02-23 20:51:50,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2022-02-23 20:51:50,271 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-02-23 20:51:50,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-23 20:51:50,272 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:51:50,272 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:51:50,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 20:51:50,272 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:51:50,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:51:50,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1443329038, now seen corresponding path program 1 times [2022-02-23 20:51:50,273 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:51:50,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493317361] [2022-02-23 20:51:50,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:51:50,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:51:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:51:50,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:51:50,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:51:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:51:50,419 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:51:50,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493317361] [2022-02-23 20:51:50,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493317361] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:51:50,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076560186] [2022-02-23 20:51:50,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:51:50,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:51:50,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:51:50,423 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) [2022-02-23 20:51:50,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 20:51:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:51:50,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 20:51:50,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:51:50,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:51:50,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:51:50,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:51:50,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076560186] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 20:51:50,754 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 20:51:50,754 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-02-23 20:51:50,754 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91051738] [2022-02-23 20:51:50,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 20:51:50,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 20:51:50,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:51:50,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 20:51:50,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-23 20:51:50,756 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 11 states have internal predecessors, (17), 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) [2022-02-23 20:51:50,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:51:50,880 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2022-02-23 20:51:50,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 20:51:50,881 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 11 states have internal predecessors, (17), 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 13 [2022-02-23 20:51:50,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:51:50,881 INFO L225 Difference]: With dead ends: 14 [2022-02-23 20:51:50,881 INFO L226 Difference]: Without dead ends: 0 [2022-02-23 20:51:50,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-02-23 20:51:50,883 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 20:51:50,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 45 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 20:51:50,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-23 20:51:50,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-23 20:51:50,884 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) [2022-02-23 20:51:50,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-23 20:51:50,885 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2022-02-23 20:51:50,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:51:50,885 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-23 20:51:50,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 11 states have internal predecessors, (17), 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) [2022-02-23 20:51:50,885 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-23 20:51:50,885 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-23 20:51:50,888 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 20:51:50,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 20:51:51,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:51:51,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-02-23 20:51:51,144 INFO L854 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-02-23 20:51:51,144 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-02-23 20:51:51,144 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-02-23 20:51:51,145 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-02-23 20:51:51,145 INFO L861 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-02-23 20:51:51,145 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-02-23 20:51:51,145 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-02-23 20:51:51,145 INFO L861 garLoopResultBuilder]: At program point mainENTRY(lines 24 37) the Hoare annotation is: true [2022-02-23 20:51:51,145 INFO L858 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2022-02-23 20:51:51,145 INFO L858 garLoopResultBuilder]: For program point mainFINAL(lines 24 37) no Hoare annotation was computed. [2022-02-23 20:51:51,146 INFO L854 garLoopResultBuilder]: At program point L30-2(lines 30 34) the Hoare annotation is: (let ((.cse0 (+ main_~lo~0 (* main_~mid~0 2)))) (and (<= main_~hi~0 .cse0) (< 0 (+ main_~mid~0 1)) (<= .cse0 main_~hi~0))) [2022-02-23 20:51:51,146 INFO L858 garLoopResultBuilder]: For program point mainEXIT(lines 24 37) no Hoare annotation was computed. [2022-02-23 20:51:51,146 INFO L854 garLoopResultBuilder]: At program point L30-3(lines 30 34) the Hoare annotation is: (and (< 0 (+ main_~mid~0 1)) (< main_~hi~0 (+ main_~lo~0 1)) (<= (+ main_~lo~0 (* main_~mid~0 2)) main_~hi~0)) [2022-02-23 20:51:51,146 INFO L858 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2022-02-23 20:51:51,146 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-02-23 20:51:51,146 INFO L858 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-02-23 20:51:51,146 INFO L858 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2022-02-23 20:51:51,146 INFO L858 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2022-02-23 20:51:51,147 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2022-02-23 20:51:51,147 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2022-02-23 20:51:51,149 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-02-23 20:51:51,150 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 20:51:51,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 08:51:51 BasicIcfg [2022-02-23 20:51:51,161 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 20:51:51,161 INFO L158 Benchmark]: Toolchain (without parser) took 25020.24ms. Allocated memory was 181.4MB in the beginning and 245.4MB in the end (delta: 64.0MB). Free memory was 126.1MB in the beginning and 151.2MB in the end (delta: -25.0MB). Peak memory consumption was 39.7MB. Max. memory is 8.0GB. [2022-02-23 20:51:51,162 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 181.4MB. Free memory is still 142.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 20:51:51,162 INFO L158 Benchmark]: CACSL2BoogieTranslator took 202.52ms. Allocated memory was 181.4MB in the beginning and 245.4MB in the end (delta: 64.0MB). Free memory was 125.9MB in the beginning and 216.3MB in the end (delta: -90.5MB). Peak memory consumption was 10.8MB. Max. memory is 8.0GB. [2022-02-23 20:51:51,162 INFO L158 Benchmark]: Boogie Preprocessor took 21.25ms. Allocated memory is still 245.4MB. Free memory was 216.3MB in the beginning and 214.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-23 20:51:51,163 INFO L158 Benchmark]: RCFGBuilder took 287.82ms. Allocated memory is still 245.4MB. Free memory was 214.8MB in the beginning and 204.9MB in the end (delta: 9.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-23 20:51:51,163 INFO L158 Benchmark]: IcfgTransformer took 23139.55ms. Allocated memory is still 245.4MB. Free memory was 204.9MB in the beginning and 161.3MB in the end (delta: 43.6MB). Peak memory consumption was 44.0MB. Max. memory is 8.0GB. [2022-02-23 20:51:51,163 INFO L158 Benchmark]: TraceAbstraction took 1361.22ms. Allocated memory is still 245.4MB. Free memory was 160.7MB in the beginning and 151.2MB in the end (delta: 9.5MB). Peak memory consumption was 11.1MB. Max. memory is 8.0GB. [2022-02-23 20:51:51,165 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 181.4MB. Free memory is still 142.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 202.52ms. Allocated memory was 181.4MB in the beginning and 245.4MB in the end (delta: 64.0MB). Free memory was 125.9MB in the beginning and 216.3MB in the end (delta: -90.5MB). Peak memory consumption was 10.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.25ms. Allocated memory is still 245.4MB. Free memory was 216.3MB in the beginning and 214.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 287.82ms. Allocated memory is still 245.4MB. Free memory was 214.8MB in the beginning and 204.9MB in the end (delta: 9.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 23139.55ms. Allocated memory is still 245.4MB. Free memory was 204.9MB in the beginning and 161.3MB in the end (delta: 43.6MB). Peak memory consumption was 44.0MB. Max. memory is 8.0GB. * TraceAbstraction took 1361.22ms. Allocated memory is still 245.4MB. Free memory was 160.7MB in the beginning and 151.2MB in the end (delta: 9.5MB). Peak memory consumption was 11.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.3s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 29 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 28 mSDsluCounter, 86 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 47 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 47 IncrementalHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 39 mSDtfsCounter, 47 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 16, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 11 NumberOfFragments, 49 HoareAnnotationTreeSize, 9 FomulaSimplifications, 6 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 29 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 50 NumberOfCodeBlocks, 50 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 220 SizeOfPredicates, 3 NumberOfNonLiveVariables, 61 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 0/3 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: 30]: Loop Invariant Derived loop invariant: (hi <= lo + mid * 2 && 0 < mid + 1) && lo + mid * 2 <= hi RESULT: Ultimate proved your program to be correct! [2022-02-23 20:51:51,182 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...