/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/loops/sum04-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 08:03:54,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 08:03:54,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 08:03:54,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 08:03:54,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 08:03:54,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 08:03:54,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 08:03:54,588 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 08:03:54,611 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 08:03:54,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 08:03:54,613 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 08:03:54,613 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 08:03:54,613 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 08:03:54,613 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 08:03:54,614 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 08:03:54,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 08:03:54,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 08:03:54,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 08:03:54,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 08:03:54,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 08:03:54,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 08:03:54,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 08:03:54,615 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 08:03:54,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 08:03:54,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 08:03:54,615 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 08:03:54,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 08:03:54,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:03:54,617 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 08:03:54,617 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 08:03:54,617 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 08:03:54,617 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 08:03:54,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 08:03:54,617 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 08:03:54,618 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 08:03:54,618 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 08:03:54,619 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 08:03:54,619 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 08:03:54,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 08:03:54,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 08:03:54,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 08:03:54,837 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 08:03:54,838 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 08:03:54,839 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-2.i [2022-03-20 08:03:54,886 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/113855a95/ac6fe853eef24a0c913d379106b0a780/FLAGdd8b06b67 [2022-03-20 08:03:55,253 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 08:03:55,253 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-2.i [2022-03-20 08:03:55,259 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/113855a95/ac6fe853eef24a0c913d379106b0a780/FLAGdd8b06b67 [2022-03-20 08:03:55,269 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/113855a95/ac6fe853eef24a0c913d379106b0a780 [2022-03-20 08:03:55,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 08:03:55,273 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 08:03:55,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 08:03:55,274 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 08:03:55,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 08:03:55,276 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:03:55" (1/1) ... [2022-03-20 08:03:55,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68b13b39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:55, skipping insertion in model container [2022-03-20 08:03:55,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:03:55" (1/1) ... [2022-03-20 08:03:55,281 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 08:03:55,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 08:03:55,397 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-2.i[808,821] [2022-03-20 08:03:55,404 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:03:55,408 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 08:03:55,415 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-2.i[808,821] [2022-03-20 08:03:55,416 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:03:55,424 INFO L208 MainTranslator]: Completed translation [2022-03-20 08:03:55,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:55 WrapperNode [2022-03-20 08:03:55,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 08:03:55,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 08:03:55,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 08:03:55,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 08:03:55,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:55" (1/1) ... [2022-03-20 08:03:55,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:55" (1/1) ... [2022-03-20 08:03:55,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:55" (1/1) ... [2022-03-20 08:03:55,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:55" (1/1) ... [2022-03-20 08:03:55,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:55" (1/1) ... [2022-03-20 08:03:55,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:55" (1/1) ... [2022-03-20 08:03:55,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:55" (1/1) ... [2022-03-20 08:03:55,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 08:03:55,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 08:03:55,441 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 08:03:55,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 08:03:55,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:55" (1/1) ... [2022-03-20 08:03:55,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:03:55,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:03:55,474 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 08:03:55,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 08:03:55,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 08:03:55,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 08:03:55,498 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 08:03:55,498 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 08:03:55,498 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 08:03:55,499 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 08:03:55,499 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 08:03:55,500 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 08:03:55,500 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 08:03:55,500 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 08:03:55,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 08:03:55,501 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 08:03:55,501 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 08:03:55,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 08:03:55,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 08:03:55,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 08:03:55,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 08:03:55,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 08:03:55,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 08:03:55,548 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 08:03:55,549 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 08:03:55,618 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 08:03:55,628 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 08:03:55,629 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 08:03:55,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:03:55 BoogieIcfgContainer [2022-03-20 08:03:55,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 08:03:55,630 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 08:03:55,630 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 08:03:55,647 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 08:03:55,649 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:03:55" (1/1) ... [2022-03-20 08:03:55,651 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 08:03:55,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:03:55 BasicIcfg [2022-03-20 08:03:55,673 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 08:03:55,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 08:03:55,674 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 08:03:55,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 08:03:55,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:03:55" (1/4) ... [2022-03-20 08:03:55,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28d7610c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:03:55, skipping insertion in model container [2022-03-20 08:03:55,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:03:55" (2/4) ... [2022-03-20 08:03:55,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28d7610c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:03:55, skipping insertion in model container [2022-03-20 08:03:55,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:03:55" (3/4) ... [2022-03-20 08:03:55,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28d7610c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:03:55, skipping insertion in model container [2022-03-20 08:03:55,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:03:55" (4/4) ... [2022-03-20 08:03:55,684 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-2.iqvasr [2022-03-20 08:03:55,688 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 08:03:55,688 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 08:03:55,727 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 08:03:55,733 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 08:03:55,733 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 08:03:55,752 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 08:03:55,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 08:03:55,754 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:03:55,755 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:03:55,755 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:03:55,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:03:55,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1795998501, now seen corresponding path program 1 times [2022-03-20 08:03:55,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:03:55,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233096934] [2022-03-20 08:03:55,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:55,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:03:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:55,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:03:55,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:55,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:55,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:03:55,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233096934] [2022-03-20 08:03:55,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233096934] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:03:55,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:03:55,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 08:03:55,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093663131] [2022-03-20 08:03:55,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:03:55,913 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 08:03:55,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:03:55,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 08:03:55,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:03:55,936 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:03:55,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:03:55,975 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-03-20 08:03:55,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 08:03:55,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-20 08:03:55,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:03:55,981 INFO L225 Difference]: With dead ends: 30 [2022-03-20 08:03:55,981 INFO L226 Difference]: Without dead ends: 13 [2022-03-20 08:03:55,983 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:03:55,986 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:03:55,986 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 21 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:03:55,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-03-20 08:03:56,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-03-20 08:03:56,012 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) [2022-03-20 08:03:56,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-03-20 08:03:56,014 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2022-03-20 08:03:56,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:03:56,015 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-03-20 08:03:56,015 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:03:56,015 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-03-20 08:03:56,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 08:03:56,016 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:03:56,016 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:03:56,017 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 08:03:56,017 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:03:56,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:03:56,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1796922022, now seen corresponding path program 1 times [2022-03-20 08:03:56,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:03:56,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853738028] [2022-03-20 08:03:56,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:56,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:03:56,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:56,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:03:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:56,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:03:56,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853738028] [2022-03-20 08:03:56,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853738028] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:03:56,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:03:56,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 08:03:56,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446929051] [2022-03-20 08:03:56,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:03:56,085 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 08:03:56,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:03:56,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 08:03:56,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 08:03:56,087 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:03:56,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:03:56,119 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-03-20 08:03:56,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 08:03:56,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-20 08:03:56,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:03:56,120 INFO L225 Difference]: With dead ends: 20 [2022-03-20 08:03:56,120 INFO L226 Difference]: Without dead ends: 15 [2022-03-20 08:03:56,123 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 08:03:56,124 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:03:56,125 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 18 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:03:56,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-20 08:03:56,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-03-20 08:03:56,135 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) [2022-03-20 08:03:56,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-03-20 08:03:56,140 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2022-03-20 08:03:56,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:03:56,140 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-03-20 08:03:56,140 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:03:56,141 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-03-20 08:03:56,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-20 08:03:56,141 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:03:56,141 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:03:56,141 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 08:03:56,141 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:03:56,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:03:56,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1176605188, now seen corresponding path program 1 times [2022-03-20 08:03:56,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:03:56,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130735853] [2022-03-20 08:03:56,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:56,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:03:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:56,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:03:56,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:56,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:56,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:03:56,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130735853] [2022-03-20 08:03:56,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130735853] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:03:56,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571726811] [2022-03-20 08:03:56,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:56,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:03:56,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:03:56,192 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:03:56,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 08:03:56,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:56,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 08:03:56,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:03:56,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:56,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:03:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:56,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571726811] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:03:56,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:03:56,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-20 08:03:56,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703078142] [2022-03-20 08:03:56,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:03:56,374 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 08:03:56,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:03:56,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 08:03:56,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-20 08:03:56,375 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:03:56,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:03:56,455 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-03-20 08:03:56,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 08:03:56,456 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-20 08:03:56,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:03:56,456 INFO L225 Difference]: With dead ends: 25 [2022-03-20 08:03:56,456 INFO L226 Difference]: Without dead ends: 20 [2022-03-20 08:03:56,457 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-20 08:03:56,457 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:03:56,457 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 18 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:03:56,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-20 08:03:56,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-20 08:03:56,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:03:56,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-03-20 08:03:56,461 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 13 [2022-03-20 08:03:56,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:03:56,461 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-03-20 08:03:56,461 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:03:56,461 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-03-20 08:03:56,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 08:03:56,461 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:03:56,462 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:03:56,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 08:03:56,663 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:03:56,664 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:03:56,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:03:56,664 INFO L85 PathProgramCache]: Analyzing trace with hash 2042821406, now seen corresponding path program 2 times [2022-03-20 08:03:56,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:03:56,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284122977] [2022-03-20 08:03:56,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:56,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:03:56,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:56,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:03:56,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:56,754 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:56,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:03:56,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284122977] [2022-03-20 08:03:56,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284122977] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:03:56,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009067483] [2022-03-20 08:03:56,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:03:56,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:03:56,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:03:56,756 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:03:56,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 08:03:56,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:03:56,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:03:56,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 08:03:56,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:03:56,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:56,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:03:56,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:56,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009067483] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:03:56,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:03:56,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-03-20 08:03:56,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912616144] [2022-03-20 08:03:56,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:03:56,883 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 08:03:56,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:03:56,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 08:03:56,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-03-20 08:03:56,883 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:03:56,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:03:56,977 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-03-20 08:03:56,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 08:03:56,977 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-20 08:03:56,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:03:56,978 INFO L225 Difference]: With dead ends: 33 [2022-03-20 08:03:56,978 INFO L226 Difference]: Without dead ends: 28 [2022-03-20 08:03:56,978 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-03-20 08:03:56,979 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:03:56,979 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 33 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:03:56,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-20 08:03:56,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-03-20 08:03:56,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:03:56,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2022-03-20 08:03:56,983 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 19 [2022-03-20 08:03:56,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:03:56,983 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2022-03-20 08:03:56,983 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:03:56,983 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2022-03-20 08:03:56,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 08:03:56,984 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:03:56,984 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:03:57,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 08:03:57,199 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 08:03:57,200 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:03:57,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:03:57,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1851728790, now seen corresponding path program 3 times [2022-03-20 08:03:57,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:03:57,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114132119] [2022-03-20 08:03:57,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:57,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:03:57,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:57,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:03:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:57,396 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:57,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:03:57,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114132119] [2022-03-20 08:03:57,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114132119] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:03:57,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931220428] [2022-03-20 08:03:57,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 08:03:57,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:03:57,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:03:57,397 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:03:57,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 08:03:57,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-20 08:03:57,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:03:57,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 08:03:57,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:03:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:57,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:03:57,915 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:57,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931220428] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:03:57,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:03:57,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 25 [2022-03-20 08:03:57,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469947654] [2022-03-20 08:03:57,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:03:57,916 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 08:03:57,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:03:57,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 08:03:57,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2022-03-20 08:03:57,917 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 22 states have internal predecessors, (44), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:03:58,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:03:58,226 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2022-03-20 08:03:58,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 08:03:58,226 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 22 states have internal predecessors, (44), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-20 08:03:58,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:03:58,227 INFO L225 Difference]: With dead ends: 35 [2022-03-20 08:03:58,227 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 08:03:58,228 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=1142, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 08:03:58,228 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 19 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:03:58,228 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 100 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:03:58,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 08:03:58,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-20 08:03:58,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:03:58,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2022-03-20 08:03:58,232 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2022-03-20 08:03:58,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:03:58,232 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2022-03-20 08:03:58,232 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 22 states have internal predecessors, (44), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:03:58,232 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2022-03-20 08:03:58,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 08:03:58,233 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:03:58,233 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:03:58,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 08:03:58,433 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:03:58,433 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:03:58,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:03:58,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1988665612, now seen corresponding path program 4 times [2022-03-20 08:03:58,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:03:58,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262882447] [2022-03-20 08:03:58,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:03:58,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:03:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:58,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:03:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:03:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 66 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:58,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:03:58,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262882447] [2022-03-20 08:03:58,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262882447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:03:58,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200833861] [2022-03-20 08:03:58,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 08:03:58,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:03:58,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:03:58,527 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:03:58,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 08:03:58,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 08:03:58,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:03:58,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 08:03:58,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:03:58,624 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:03:58,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 08:03:58,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200833861] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:03:58,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 08:03:58,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 13 [2022-03-20 08:03:58,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573753952] [2022-03-20 08:03:58,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:03:58,625 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 08:03:58,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:03:58,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 08:03:58,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-03-20 08:03:58,625 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:03:58,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:03:58,646 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-03-20 08:03:58,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 08:03:58,646 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 2 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 29 [2022-03-20 08:03:58,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:03:58,646 INFO L225 Difference]: With dead ends: 30 [2022-03-20 08:03:58,646 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 08:03:58,647 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-03-20 08:03:58,647 INFO L913 BasicCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:03:58,647 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:03:58,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 08:03:58,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 08:03:58,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 08:03:58,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 08:03:58,648 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2022-03-20 08:03:58,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:03:58,648 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 08:03:58,648 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:03:58,648 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 08:03:58,648 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 08:03:58,650 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 08:03:58,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 08:03:58,867 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:03:58,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 08:03:58,921 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 08:03:58,921 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 08:03:58,921 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 08:03:58,921 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 08:03:58,921 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 08:03:58,921 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 08:03:58,921 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 08:03:58,921 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 28) the Hoare annotation is: true [2022-03-20 08:03:58,921 INFO L878 garLoopResultBuilder]: At program point L24-3(lines 24 26) the Hoare annotation is: (or (and (<= main_~sn~0 16) (<= 9 main_~i~0) (< 15 main_~sn~0)) (and (<= 6 main_~sn~0) (<= main_~sn~0 6) (<= main_~i~0 4) (<= 4 main_~i~0)) (and (= main_~sn~0 0) (= main_~i~0 1)) (and (<= main_~i~0 7) (<= 12 main_~sn~0) (<= main_~sn~0 12) (<= 7 main_~i~0)) (and (<= 14 main_~sn~0) (<= 8 main_~i~0) (<= main_~i~0 8) (<= main_~sn~0 14)) (and (<= main_~sn~0 10) (<= 10 main_~sn~0) (<= main_~i~0 6) (<= 6 main_~i~0)) (and (<= 4 main_~sn~0) (<= main_~sn~0 4) (<= 3 main_~i~0) (<= main_~i~0 3)) (and (<= 2 main_~i~0) (<= main_~sn~0 2) (<= main_~i~0 2) (<= 2 main_~sn~0)) (and (<= main_~i~0 5) (<= 8 main_~sn~0) (<= 5 main_~i~0) (<= main_~sn~0 8))) [2022-03-20 08:03:58,921 INFO L878 garLoopResultBuilder]: At program point L24-4(lines 24 26) the Hoare annotation is: (and (<= main_~sn~0 16) (< 15 main_~sn~0)) [2022-03-20 08:03:58,922 INFO L882 garLoopResultBuilder]: For program point L24-2(lines 24 26) no Hoare annotation was computed. [2022-03-20 08:03:58,922 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 22 28) no Hoare annotation was computed. [2022-03-20 08:03:58,922 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 22 28) no Hoare annotation was computed. [2022-03-20 08:03:58,922 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 19) the Hoare annotation is: true [2022-03-20 08:03:58,922 INFO L882 garLoopResultBuilder]: For program point L15(lines 15 17) no Hoare annotation was computed. [2022-03-20 08:03:58,922 INFO L882 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2022-03-20 08:03:58,922 INFO L882 garLoopResultBuilder]: For program point L15-2(lines 14 19) no Hoare annotation was computed. [2022-03-20 08:03:58,922 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2022-03-20 08:03:58,922 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 19) no Hoare annotation was computed. [2022-03-20 08:03:58,924 INFO L719 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2022-03-20 08:03:58,925 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 08:03:58,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:03:58 BasicIcfg [2022-03-20 08:03:58,933 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 08:03:58,934 INFO L158 Benchmark]: Toolchain (without parser) took 3660.78ms. Allocated memory was 197.1MB in the beginning and 246.4MB in the end (delta: 49.3MB). Free memory was 147.6MB in the beginning and 97.6MB in the end (delta: 50.0MB). Peak memory consumption was 99.6MB. Max. memory is 8.0GB. [2022-03-20 08:03:58,934 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 197.1MB. Free memory is still 163.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 08:03:58,934 INFO L158 Benchmark]: CACSL2BoogieTranslator took 150.54ms. Allocated memory is still 197.1MB. Free memory was 147.4MB in the beginning and 174.2MB in the end (delta: -26.8MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-20 08:03:58,934 INFO L158 Benchmark]: Boogie Preprocessor took 15.54ms. Allocated memory is still 197.1MB. Free memory was 174.2MB in the beginning and 172.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 08:03:58,934 INFO L158 Benchmark]: RCFGBuilder took 188.88ms. Allocated memory is still 197.1MB. Free memory was 172.5MB in the beginning and 162.4MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-20 08:03:58,935 INFO L158 Benchmark]: IcfgTransformer took 42.81ms. Allocated memory is still 197.1MB. Free memory was 162.4MB in the beginning and 161.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 08:03:58,935 INFO L158 Benchmark]: TraceAbstraction took 3258.96ms. Allocated memory was 197.1MB in the beginning and 246.4MB in the end (delta: 49.3MB). Free memory was 160.6MB in the beginning and 97.6MB in the end (delta: 62.9MB). Peak memory consumption was 112.5MB. Max. memory is 8.0GB. [2022-03-20 08:03:58,936 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 197.1MB. Free memory is still 163.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 150.54ms. Allocated memory is still 197.1MB. Free memory was 147.4MB in the beginning and 174.2MB in the end (delta: -26.8MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 15.54ms. Allocated memory is still 197.1MB. Free memory was 174.2MB in the beginning and 172.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 188.88ms. Allocated memory is still 197.1MB. Free memory was 172.5MB in the beginning and 162.4MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 42.81ms. Allocated memory is still 197.1MB. Free memory was 162.4MB in the beginning and 161.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 3258.96ms. Allocated memory was 197.1MB in the beginning and 246.4MB in the end (delta: 49.3MB). Free memory was 160.6MB in the beginning and 97.6MB in the end (delta: 62.9MB). Peak memory consumption was 112.5MB. 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, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.2s, OverallIterations: 6, TraceHistogramMax: 9, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 77 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 76 mSDsluCounter, 211 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 136 mSDsCounter, 42 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 472 IncrementalHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 42 mSolverCounterUnsat, 75 mSDtfsCounter, 472 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 219 GetRequests, 139 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=5, InterpolantAutomatonStates: 50, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 12 PreInvPairs, 22 NumberOfFragments, 127 HoareAnnotationTreeSize, 12 FomulaSimplifications, 11 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 198 NumberOfCodeBlocks, 196 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 244 ConstructedInterpolants, 0 QuantifiedInterpolants, 826 SizeOfPredicates, 1 NumberOfNonLiveVariables, 283 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 147/405 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: (((((((((sn <= 16 && 9 <= i) && 15 < sn) || (((6 <= sn && sn <= 6) && i <= 4) && 4 <= i)) || (sn == 0 && i == 1)) || (((i <= 7 && 12 <= sn) && sn <= 12) && 7 <= i)) || (((14 <= sn && 8 <= i) && i <= 8) && sn <= 14)) || (((sn <= 10 && 10 <= sn) && i <= 6) && 6 <= i)) || (((4 <= sn && sn <= 4) && 3 <= i) && i <= 3)) || (((2 <= i && sn <= 2) && i <= 2) && 2 <= sn)) || (((i <= 5 && 8 <= sn) && 5 <= i) && sn <= 8) RESULT: Ultimate proved your program to be correct! [2022-03-20 08:03:58,958 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...