/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-zilu/benchmark20_conjunctive.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 10:41:10,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 10:41:10,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 10:41:10,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 10:41:10,655 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 10:41:10,656 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 10:41:10,659 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 10:41:10,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 10:41:10,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 10:41:10,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 10:41:10,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 10:41:10,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 10:41:10,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 10:41:10,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 10:41:10,671 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 10:41:10,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 10:41:10,673 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 10:41:10,673 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 10:41:10,677 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 10:41:10,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 10:41:10,682 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 10:41:10,682 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 10:41:10,683 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 10:41:10,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 10:41:10,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 10:41:10,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 10:41:10,694 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 10:41:10,695 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 10:41:10,696 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 10:41:10,697 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 10:41:10,717 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 10:41:10,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 10:41:10,717 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 10:41:10,718 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 10:41:10,718 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 10:41:10,718 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 10:41:10,718 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 10:41:10,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 10:41:10,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 10:41:10,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 10:41:10,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 10:41:10,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 10:41:10,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 10:41:10,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 10:41:10,720 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 10:41:10,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 10:41:10,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 10:41:10,720 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 10:41:10,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 10:41:10,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 10:41:10,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 10:41:10,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 10:41:10,720 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 10:41:10,721 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 10:41:10,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 10:41:10,721 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 10:41:10,721 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 10:41:10,721 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 10:41:10,721 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 10:41:10,722 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 10:41:10,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 10:41:10,902 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 10:41:10,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 10:41:10,904 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 10:41:10,906 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 10:41:10,907 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-zilu/benchmark20_conjunctive.i [2022-04-06 10:41:10,959 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2a0bffcc/c2d739a8cb144c9b883042ef3e2e7525/FLAG280c63562 [2022-04-06 10:41:11,341 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 10:41:11,341 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark20_conjunctive.i [2022-04-06 10:41:11,345 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2a0bffcc/c2d739a8cb144c9b883042ef3e2e7525/FLAG280c63562 [2022-04-06 10:41:11,361 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2a0bffcc/c2d739a8cb144c9b883042ef3e2e7525 [2022-04-06 10:41:11,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 10:41:11,365 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 10:41:11,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 10:41:11,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 10:41:11,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 10:41:11,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:41:11" (1/1) ... [2022-04-06 10:41:11,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6527b097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:41:11, skipping insertion in model container [2022-04-06 10:41:11,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:41:11" (1/1) ... [2022-04-06 10:41:11,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 10:41:11,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 10:41:11,541 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-zilu/benchmark20_conjunctive.i[873,886] [2022-04-06 10:41:11,552 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 10:41:11,564 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 10:41:11,572 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-zilu/benchmark20_conjunctive.i[873,886] [2022-04-06 10:41:11,574 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 10:41:11,582 INFO L208 MainTranslator]: Completed translation [2022-04-06 10:41:11,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:41:11 WrapperNode [2022-04-06 10:41:11,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 10:41:11,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 10:41:11,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 10:41:11,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 10:41:11,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:41:11" (1/1) ... [2022-04-06 10:41:11,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:41:11" (1/1) ... [2022-04-06 10:41:11,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:41:11" (1/1) ... [2022-04-06 10:41:11,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:41:11" (1/1) ... [2022-04-06 10:41:11,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:41:11" (1/1) ... [2022-04-06 10:41:11,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:41:11" (1/1) ... [2022-04-06 10:41:11,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:41:11" (1/1) ... [2022-04-06 10:41:11,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 10:41:11,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 10:41:11,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 10:41:11,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 10:41:11,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:41:11" (1/1) ... [2022-04-06 10:41:11,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 10:41:11,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:41:11,622 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) [2022-04-06 10:41:11,627 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 [2022-04-06 10:41:11,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 10:41:11,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 10:41:11,653 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 10:41:11,653 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 10:41:11,653 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 10:41:11,653 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 10:41:11,653 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 10:41:11,653 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 10:41:11,653 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 10:41:11,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 10:41:11,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 10:41:11,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2022-04-06 10:41:11,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 10:41:11,654 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 10:41:11,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 10:41:11,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 10:41:11,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 10:41:11,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 10:41:11,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 10:41:11,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 10:41:11,694 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 10:41:11,695 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 10:41:11,764 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 10:41:11,767 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 10:41:11,767 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 10:41:11,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:41:11 BoogieIcfgContainer [2022-04-06 10:41:11,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 10:41:11,769 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 10:41:11,769 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 10:41:11,779 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 10:41:11,781 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:41:11" (1/1) ... [2022-04-06 10:41:11,782 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 10:41:11,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 10:41:11 BasicIcfg [2022-04-06 10:41:11,797 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 10:41:11,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 10:41:11,798 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 10:41:11,800 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 10:41:11,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 10:41:11" (1/4) ... [2022-04-06 10:41:11,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47067afd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:41:11, skipping insertion in model container [2022-04-06 10:41:11,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:41:11" (2/4) ... [2022-04-06 10:41:11,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47067afd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:41:11, skipping insertion in model container [2022-04-06 10:41:11,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:41:11" (3/4) ... [2022-04-06 10:41:11,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47067afd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 10:41:11, skipping insertion in model container [2022-04-06 10:41:11,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 10:41:11" (4/4) ... [2022-04-06 10:41:11,802 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark20_conjunctive.iqvasr [2022-04-06 10:41:11,805 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 10:41:11,805 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 10:41:11,861 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 10:41:11,866 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 [2022-04-06 10:41:11,866 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 10:41:11,886 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) [2022-04-06 10:41:11,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 10:41:11,889 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:41:11,889 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:41:11,890 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:41:11,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:41:11,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1809217115, now seen corresponding path program 1 times [2022-04-06 10:41:11,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:41:11,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322381017] [2022-04-06 10:41:11,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:41:11,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:41:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:12,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:41:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:12,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:41:12,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:41:12,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322381017] [2022-04-06 10:41:12,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322381017] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 10:41:12,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 10:41:12,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 10:41:12,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823642567] [2022-04-06 10:41:12,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 10:41:12,046 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 10:41:12,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:41:12,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 10:41:12,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 10:41:12,068 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) [2022-04-06 10:41:12,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:41:12,103 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-04-06 10:41:12,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 10:41:12,105 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 [2022-04-06 10:41:12,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:41:12,109 INFO L225 Difference]: With dead ends: 32 [2022-04-06 10:41:12,109 INFO L226 Difference]: Without dead ends: 13 [2022-04-06 10:41:12,111 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 [2022-04-06 10:41:12,115 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 10:41:12,116 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 10:41:12,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-04-06 10:41:12,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-04-06 10:41:12,141 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) [2022-04-06 10:41:12,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-04-06 10:41:12,142 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2022-04-06 10:41:12,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:41:12,142 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-04-06 10:41:12,143 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) [2022-04-06 10:41:12,143 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-04-06 10:41:12,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 10:41:12,143 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:41:12,143 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:41:12,143 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 10:41:12,144 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:41:12,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:41:12,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1810140636, now seen corresponding path program 1 times [2022-04-06 10:41:12,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:41:12,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601485964] [2022-04-06 10:41:12,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:41:12,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:41:12,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:12,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:41:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:41:12,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:41:12,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601485964] [2022-04-06 10:41:12,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601485964] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 10:41:12,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 10:41:12,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 10:41:12,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223571980] [2022-04-06 10:41:12,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 10:41:12,236 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 10:41:12,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:41:12,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 10:41:12,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 10:41:12,237 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 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) [2022-04-06 10:41:12,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:41:12,296 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2022-04-06 10:41:12,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 10:41:12,296 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 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 [2022-04-06 10:41:12,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:41:12,297 INFO L225 Difference]: With dead ends: 19 [2022-04-06 10:41:12,297 INFO L226 Difference]: Without dead ends: 14 [2022-04-06 10:41:12,297 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-06 10:41:12,298 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 10:41:12,299 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 28 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 10:41:12,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-04-06 10:41:12,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-04-06 10:41:12,301 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) [2022-04-06 10:41:12,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-04-06 10:41:12,302 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-04-06 10:41:12,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:41:12,302 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-04-06 10:41:12,302 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 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) [2022-04-06 10:41:12,302 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-04-06 10:41:12,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 10:41:12,303 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:41:12,303 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:41:12,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 10:41:12,303 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:41:12,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:41:12,304 INFO L85 PathProgramCache]: Analyzing trace with hash 306506437, now seen corresponding path program 1 times [2022-04-06 10:41:12,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:41:12,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886642813] [2022-04-06 10:41:12,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:41:12,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:41:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:12,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:41:12,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:41:12,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:41:12,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886642813] [2022-04-06 10:41:12,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886642813] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:41:12,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239156630] [2022-04-06 10:41:12,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:41:12,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:41:12,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:41:12,354 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) [2022-04-06 10:41:12,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 10:41:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:41:12,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 10:41:12,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:41:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:41:12,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:41:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:41:12,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239156630] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:41:12,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:41:12,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-04-06 10:41:12,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814858214] [2022-04-06 10:41:12,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:41:12,567 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 10:41:12,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:41:12,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 10:41:12,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 10:41:12,567 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 7 states have internal predecessors, (14), 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) [2022-04-06 10:41:12,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:41:12,611 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2022-04-06 10:41:12,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 10:41:12,612 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 7 states have internal predecessors, (14), 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 [2022-04-06 10:41:12,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:41:12,612 INFO L225 Difference]: With dead ends: 14 [2022-04-06 10:41:12,612 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 10:41:12,613 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-04-06 10:41:12,613 INFO L913 BasicCegarLoop]: 8 mSDtfsCounter, 8 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 10:41:12,614 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 35 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 10:41:12,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 10:41:12,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 10:41:12,614 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) [2022-04-06 10:41:12,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 10:41:12,614 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2022-04-06 10:41:12,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:41:12,615 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 10:41:12,615 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 7 states have internal predecessors, (14), 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) [2022-04-06 10:41:12,615 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 10:41:12,615 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 10:41:12,617 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 10:41:12,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 10:41:12,843 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 [2022-04-06 10:41:12,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 10:41:12,879 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|)) [2022-04-06 10:41:12,880 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-04-06 10:41:12,880 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-04-06 10:41:12,880 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 10:41:12,880 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 10:41:12,880 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-04-06 10:41:12,880 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-04-06 10:41:12,880 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 19 30) the Hoare annotation is: true [2022-04-06 10:41:12,880 INFO L882 garLoopResultBuilder]: For program point L23(line 23) no Hoare annotation was computed. [2022-04-06 10:41:12,880 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 19 30) no Hoare annotation was computed. [2022-04-06 10:41:12,881 INFO L878 garLoopResultBuilder]: At program point L24-2(lines 24 27) the Hoare annotation is: (and (<= 0 main_~i~0) (<= 0 main_~sum~0)) [2022-04-06 10:41:12,881 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 19 30) no Hoare annotation was computed. [2022-04-06 10:41:12,881 INFO L878 garLoopResultBuilder]: At program point L24-3(lines 24 27) the Hoare annotation is: (<= 0 main_~sum~0) [2022-04-06 10:41:12,881 INFO L882 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2022-04-06 10:41:12,881 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 18) the Hoare annotation is: true [2022-04-06 10:41:12,881 INFO L882 garLoopResultBuilder]: For program point L15(lines 15 17) no Hoare annotation was computed. [2022-04-06 10:41:12,881 INFO L882 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2022-04-06 10:41:12,881 INFO L882 garLoopResultBuilder]: For program point L15-2(lines 14 18) no Hoare annotation was computed. [2022-04-06 10:41:12,881 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2022-04-06 10:41:12,881 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 18) no Hoare annotation was computed. [2022-04-06 10:41:12,884 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-04-06 10:41:12,885 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 10:41:12,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 10:41:12 BasicIcfg [2022-04-06 10:41:12,897 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 10:41:12,897 INFO L158 Benchmark]: Toolchain (without parser) took 1532.40ms. Allocated memory was 176.2MB in the beginning and 225.4MB in the end (delta: 49.3MB). Free memory was 118.6MB in the beginning and 128.2MB in the end (delta: -9.6MB). Peak memory consumption was 40.2MB. Max. memory is 8.0GB. [2022-04-06 10:41:12,898 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 176.2MB. Free memory is still 134.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 10:41:12,898 INFO L158 Benchmark]: CACSL2BoogieTranslator took 216.06ms. Allocated memory was 176.2MB in the beginning and 225.4MB in the end (delta: 49.3MB). Free memory was 118.5MB in the beginning and 197.4MB in the end (delta: -78.8MB). Peak memory consumption was 12.4MB. Max. memory is 8.0GB. [2022-04-06 10:41:12,899 INFO L158 Benchmark]: Boogie Preprocessor took 17.63ms. Allocated memory is still 225.4MB. Free memory was 197.4MB in the beginning and 195.8MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 10:41:12,899 INFO L158 Benchmark]: RCFGBuilder took 166.75ms. Allocated memory is still 225.4MB. Free memory was 195.8MB in the beginning and 184.8MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 10:41:12,899 INFO L158 Benchmark]: IcfgTransformer took 28.02ms. Allocated memory is still 225.4MB. Free memory was 184.8MB in the beginning and 183.8MB in the end (delta: 999.8kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 10:41:12,900 INFO L158 Benchmark]: TraceAbstraction took 1098.65ms. Allocated memory is still 225.4MB. Free memory was 183.2MB in the beginning and 128.2MB in the end (delta: 55.1MB). Peak memory consumption was 55.6MB. Max. memory is 8.0GB. [2022-04-06 10:41:12,902 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 176.2MB. Free memory is still 134.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 216.06ms. Allocated memory was 176.2MB in the beginning and 225.4MB in the end (delta: 49.3MB). Free memory was 118.5MB in the beginning and 197.4MB in the end (delta: -78.8MB). Peak memory consumption was 12.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.63ms. Allocated memory is still 225.4MB. Free memory was 197.4MB in the beginning and 195.8MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 166.75ms. Allocated memory is still 225.4MB. Free memory was 195.8MB in the beginning and 184.8MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 28.02ms. Allocated memory is still 225.4MB. Free memory was 184.8MB in the beginning and 183.8MB in the end (delta: 999.8kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 1098.65ms. Allocated memory is still 225.4MB. Free memory was 183.2MB in the beginning and 128.2MB in the end (delta: 55.1MB). Peak memory consumption was 55.6MB. 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: 16]: 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: 1.0s, 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, 31 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 30 mSDsluCounter, 86 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 47 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 53 IncrementalHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 39 mSDtfsCounter, 53 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 15, 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, 21 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 8 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 50 NumberOfCodeBlocks, 50 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 126 SizeOfPredicates, 3 NumberOfNonLiveVariables, 68 ConjunctsInSsa, 6 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: 24]: Loop Invariant Derived loop invariant: 0 <= i && 0 <= sum RESULT: Ultimate proved your program to be correct! [2022-04-06 10:41:12,933 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...