/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/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 20:32:56,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 20:32:56,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 20:32:56,188 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-14 20:32:56,195 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 20:32:56,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 20:32:56,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 20:32:56,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 20:32:56,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 20:32:56,198 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 20:32:56,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 20:32:56,208 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 20:32:56,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 20:32:56,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 20:32:56,218 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 20:32:56,219 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 20:32:56,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 20:32:56,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 20:32:56,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 20:32:56,226 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 20:32:56,230 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 20:32:56,239 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 20:32:56,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 20:32:56,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 20:32:56,240 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 20:32:56,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 20:32:56,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 20:32:56,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 20:32:56,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 20:32:56,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 20:32:56,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 20:32:56,241 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 20:32:56,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 20:32:56,242 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 20:32:56,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 20:32:56,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 20:32:56,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 20:32:56,242 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 20:32:56,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 20:32:56,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 20:32:56,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 20:32:56,242 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 20:32:56,243 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 20:32:56,243 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 20:32:56,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 20:32:56,448 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 20:32:56,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 20:32:56,450 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 20:32:56,452 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 20:32:56,453 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2022-02-14 20:32:56,515 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ae2cc8a9/b31036c3c26c453a8c4b53fe35954d42/FLAGeeba47b4b [2022-02-14 20:32:56,922 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 20:32:56,928 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-1.i [2022-02-14 20:32:56,936 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ae2cc8a9/b31036c3c26c453a8c4b53fe35954d42/FLAGeeba47b4b [2022-02-14 20:32:56,951 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ae2cc8a9/b31036c3c26c453a8c4b53fe35954d42 [2022-02-14 20:32:56,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 20:32:56,954 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 20:32:56,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 20:32:56,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 20:32:56,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 20:32:56,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 08:32:56" (1/1) ... [2022-02-14 20:32:56,974 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37b8392a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:56, skipping insertion in model container [2022-02-14 20:32:56,975 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 08:32:56" (1/1) ... [2022-02-14 20:32:56,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 20:32:57,004 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 20:32:57,175 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/sum01-1.i[808,821] [2022-02-14 20:32:57,189 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 20:32:57,194 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 20:32:57,202 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/sum01-1.i[808,821] [2022-02-14 20:32:57,205 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 20:32:57,214 INFO L208 MainTranslator]: Completed translation [2022-02-14 20:32:57,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:57 WrapperNode [2022-02-14 20:32:57,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 20:32:57,217 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 20:32:57,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 20:32:57,217 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 20:32:57,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:57" (1/1) ... [2022-02-14 20:32:57,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:57" (1/1) ... [2022-02-14 20:32:57,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:57" (1/1) ... [2022-02-14 20:32:57,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:57" (1/1) ... [2022-02-14 20:32:57,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:57" (1/1) ... [2022-02-14 20:32:57,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:57" (1/1) ... [2022-02-14 20:32:57,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:57" (1/1) ... [2022-02-14 20:32:57,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 20:32:57,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 20:32:57,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 20:32:57,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 20:32:57,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:57" (1/1) ... [2022-02-14 20:32:57,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 20:32:57,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:32:57,291 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-14 20:32:57,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-14 20:32:57,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 20:32:57,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 20:32:57,324 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 20:32:57,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 20:32:57,324 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 20:32:57,324 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 20:32:57,325 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 20:32:57,325 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-14 20:32:57,325 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-14 20:32:57,325 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 20:32:57,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 20:32:57,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 20:32:57,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-14 20:32:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 20:32:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 20:32:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 20:32:57,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 20:32:57,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 20:32:57,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 20:32:57,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 20:32:57,369 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 20:32:57,370 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 20:32:57,474 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 20:32:57,495 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 20:32:57,495 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-14 20:32:57,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:32:57 BoogieIcfgContainer [2022-02-14 20:32:57,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 20:32:57,497 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 20:32:57,497 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 20:32:57,498 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 20:32:57,501 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:32:57" (1/1) ... [2022-02-14 20:32:57,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 08:32:57 BasicIcfg [2022-02-14 20:32:57,511 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 20:32:57,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 20:32:57,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 20:32:57,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 20:32:57,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 08:32:56" (1/4) ... [2022-02-14 20:32:57,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f230beb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 08:32:57, skipping insertion in model container [2022-02-14 20:32:57,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:57" (2/4) ... [2022-02-14 20:32:57,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f230beb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 08:32:57, skipping insertion in model container [2022-02-14 20:32:57,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:32:57" (3/4) ... [2022-02-14 20:32:57,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f230beb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 08:32:57, skipping insertion in model container [2022-02-14 20:32:57,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 08:32:57" (4/4) ... [2022-02-14 20:32:57,516 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01-1.iJordan [2022-02-14 20:32:57,519 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 20:32:57,519 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 20:32:57,548 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 20:32:57,567 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-14 20:32:57,567 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 20:32:57,575 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 20:32:57,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-14 20:32:57,580 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:32:57,592 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:32:57,592 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:32:57,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:32:57,596 INFO L85 PathProgramCache]: Analyzing trace with hash -423489079, now seen corresponding path program 1 times [2022-02-14 20:32:57,601 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:32:57,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026828061] [2022-02-14 20:32:57,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:32:57,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:32:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:57,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:32:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:32:57,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:32:57,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026828061] [2022-02-14 20:32:57,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026828061] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:32:57,770 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:32:57,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 20:32:57,771 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000090160] [2022-02-14 20:32:57,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:32:57,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 20:32:57,775 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:32:57,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 20:32:57,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 20:32:57,799 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 2.3333333333333335) 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) [2022-02-14 20:32:57,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:32:57,832 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-02-14 20:32:57,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 20:32:57,836 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 [2022-02-14 20:32:57,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:32:57,841 INFO L225 Difference]: With dead ends: 20 [2022-02-14 20:32:57,841 INFO L226 Difference]: Without dead ends: 14 [2022-02-14 20:32:57,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 20:32:57,847 INFO L933 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 [2022-02-14 20:32:57,850 INFO L934 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] [2022-02-14 20:32:57,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-02-14 20:32:57,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-02-14 20:32:57,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:32:57,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-02-14 20:32:57,874 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-02-14 20:32:57,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:32:57,875 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-02-14 20:32:57,875 INFO L471 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) [2022-02-14 20:32:57,876 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-02-14 20:32:57,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-14 20:32:57,876 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:32:57,877 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:32:57,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 20:32:57,877 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:32:57,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:32:57,881 INFO L85 PathProgramCache]: Analyzing trace with hash -422565558, now seen corresponding path program 1 times [2022-02-14 20:32:57,881 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:32:57,881 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628060002] [2022-02-14 20:32:57,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:32:57,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:32:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:57,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:32:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:57,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:32:57,990 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:32:57,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628060002] [2022-02-14 20:32:57,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628060002] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:32:57,991 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:32:57,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 20:32:57,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93002178] [2022-02-14 20:32:57,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:32:57,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 20:32:57,993 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:32:57,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 20:32:57,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 20:32:57,995 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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) [2022-02-14 20:32:58,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:32:58,062 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-02-14 20:32:58,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-14 20:32:58,064 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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 [2022-02-14 20:32:58,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:32:58,065 INFO L225 Difference]: With dead ends: 20 [2022-02-14 20:32:58,065 INFO L226 Difference]: Without dead ends: 17 [2022-02-14 20:32:58,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-14 20:32:58,068 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 20:32:58,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 29 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 20:32:58,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-14 20:32:58,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-02-14 20:32:58,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:32:58,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-02-14 20:32:58,071 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-02-14 20:32:58,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:32:58,071 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-02-14 20:32:58,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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) [2022-02-14 20:32:58,071 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-02-14 20:32:58,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-14 20:32:58,072 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:32:58,072 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:32:58,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 20:32:58,072 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:32:58,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:32:58,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1744981802, now seen corresponding path program 1 times [2022-02-14 20:32:58,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:32:58,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369409703] [2022-02-14 20:32:58,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:32:58,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:32:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:58,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:32:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:32:58,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:32:58,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369409703] [2022-02-14 20:32:58,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369409703] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:32:58,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631122381] [2022-02-14 20:32:58,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:32:58,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:32:58,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:32:58,252 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 20:32:58,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 20:32:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:58,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-14 20:32:58,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:32:58,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:32:58,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:32:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:32:58,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631122381] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:32:58,756 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:32:58,756 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-14 20:32:58,756 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252888835] [2022-02-14 20:32:58,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:32:58,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-14 20:32:58,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:32:58,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-14 20:32:58,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-02-14 20:32:58,758 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:32:59,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:32:59,044 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-02-14 20:32:59,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-14 20:32:59,045 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-14 20:32:59,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:32:59,045 INFO L225 Difference]: With dead ends: 26 [2022-02-14 20:32:59,045 INFO L226 Difference]: Without dead ends: 22 [2022-02-14 20:32:59,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2022-02-14 20:32:59,047 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:32:59,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 71 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:32:59,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-02-14 20:32:59,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-02-14 20:32:59,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:32:59,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-02-14 20:32:59,051 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2022-02-14 20:32:59,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:32:59,051 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-02-14 20:32:59,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:32:59,051 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-02-14 20:32:59,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-14 20:32:59,052 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:32:59,052 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:32:59,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-14 20:32:59,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:32:59,264 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:32:59,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:32:59,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1411179434, now seen corresponding path program 2 times [2022-02-14 20:32:59,265 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:32:59,265 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946507787] [2022-02-14 20:32:59,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:32:59,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:32:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:59,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:32:59,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-14 20:32:59,492 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:32:59,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946507787] [2022-02-14 20:32:59,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946507787] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:32:59,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162194920] [2022-02-14 20:32:59,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 20:32:59,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:32:59,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:32:59,494 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) [2022-02-14 20:32:59,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 20:32:59,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 20:32:59,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:32:59,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-14 20:32:59,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:32:59,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:32:59,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:33:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:33:00,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162194920] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:33:00,108 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:33:00,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-02-14 20:33:00,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111709456] [2022-02-14 20:33:00,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:33:00,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-14 20:33:00,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:33:00,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-14 20:33:00,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2022-02-14 20:33:00,109 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 31 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:33:00,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:33:00,639 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-02-14 20:33:00,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-14 20:33:00,640 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-14 20:33:00,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:33:00,640 INFO L225 Difference]: With dead ends: 34 [2022-02-14 20:33:00,640 INFO L226 Difference]: Without dead ends: 30 [2022-02-14 20:33:00,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=367, Invalid=2083, Unknown=0, NotChecked=0, Total=2450 [2022-02-14 20:33:00,642 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:33:00,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 81 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:33:00,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-14 20:33:00,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-02-14 20:33:00,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 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) [2022-02-14 20:33:00,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-02-14 20:33:00,645 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2022-02-14 20:33:00,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:33:00,645 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-02-14 20:33:00,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:33:00,645 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-02-14 20:33:00,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-14 20:33:00,646 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:33:00,646 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:33:00,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 20:33:00,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-14 20:33:00,862 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:33:00,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:33:00,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1657807639, now seen corresponding path program 1 times [2022-02-14 20:33:00,863 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:33:00,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79605812] [2022-02-14 20:33:00,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:33:00,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:33:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:33:00,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:33:00,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:33:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:33:00,933 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:33:00,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79605812] [2022-02-14 20:33:00,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79605812] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:33:00,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588691185] [2022-02-14 20:33:00,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:33:00,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:33:00,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:33:00,934 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) [2022-02-14 20:33:00,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 20:33:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:33:00,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-14 20:33:00,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:33:01,014 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:33:01,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:33:01,081 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:33:01,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588691185] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:33:01,082 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:33:01,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-02-14 20:33:01,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721985721] [2022-02-14 20:33:01,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:33:01,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-14 20:33:01,083 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:33:01,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-14 20:33:01,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-02-14 20:33:01,084 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 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) [2022-02-14 20:33:01,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:33:01,216 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2022-02-14 20:33:01,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-14 20:33:01,216 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 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 26 [2022-02-14 20:33:01,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:33:01,219 INFO L225 Difference]: With dead ends: 44 [2022-02-14 20:33:01,219 INFO L226 Difference]: Without dead ends: 44 [2022-02-14 20:33:01,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2022-02-14 20:33:01,220 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 20:33:01,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 24 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 20:33:01,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-14 20:33:01,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-02-14 20:33:01,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:33:01,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2022-02-14 20:33:01,235 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 26 [2022-02-14 20:33:01,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:33:01,235 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2022-02-14 20:33:01,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 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) [2022-02-14 20:33:01,236 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2022-02-14 20:33:01,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-14 20:33:01,237 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:33:01,237 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:33:01,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 20:33:01,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:33:01,477 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:33:01,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:33:01,478 INFO L85 PathProgramCache]: Analyzing trace with hash -2063074549, now seen corresponding path program 2 times [2022-02-14 20:33:01,478 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:33:01,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695400152] [2022-02-14 20:33:01,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:33:01,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:33:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-14 20:33:01,527 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-14 20:33:01,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-14 20:33:01,569 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-14 20:33:01,570 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-14 20:33:01,570 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-14 20:33:01,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-14 20:33:01,573 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2022-02-14 20:33:01,575 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-14 20:33:01,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 08:33:01 BasicIcfg [2022-02-14 20:33:01,613 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-14 20:33:01,615 INFO L158 Benchmark]: Toolchain (without parser) took 4660.15ms. Allocated memory was 195.0MB in the beginning and 234.9MB in the end (delta: 39.8MB). Free memory was 142.1MB in the beginning and 201.7MB in the end (delta: -59.5MB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-14 20:33:01,615 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 195.0MB. Free memory is still 158.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-14 20:33:01,616 INFO L158 Benchmark]: CACSL2BoogieTranslator took 256.18ms. Allocated memory is still 195.0MB. Free memory was 142.0MB in the beginning and 169.0MB in the end (delta: -27.0MB). Peak memory consumption was 6.3MB. Max. memory is 8.0GB. [2022-02-14 20:33:01,616 INFO L158 Benchmark]: Boogie Preprocessor took 34.25ms. Allocated memory is still 195.0MB. Free memory was 169.0MB in the beginning and 167.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-14 20:33:01,616 INFO L158 Benchmark]: RCFGBuilder took 245.10ms. Allocated memory is still 195.0MB. Free memory was 167.3MB in the beginning and 157.5MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-14 20:33:01,616 INFO L158 Benchmark]: IcfgTransformer took 13.63ms. Allocated memory is still 195.0MB. Free memory was 157.5MB in the beginning and 156.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-14 20:33:01,617 INFO L158 Benchmark]: TraceAbstraction took 4101.38ms. Allocated memory was 195.0MB in the beginning and 234.9MB in the end (delta: 39.8MB). Free memory was 156.0MB in the beginning and 201.7MB in the end (delta: -45.7MB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-14 20:33:01,619 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 195.0MB. Free memory is still 158.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 256.18ms. Allocated memory is still 195.0MB. Free memory was 142.0MB in the beginning and 169.0MB in the end (delta: -27.0MB). Peak memory consumption was 6.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.25ms. Allocated memory is still 195.0MB. Free memory was 169.0MB in the beginning and 167.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 245.10ms. Allocated memory is still 195.0MB. Free memory was 167.3MB in the beginning and 157.5MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 13.63ms. Allocated memory is still 195.0MB. Free memory was 157.5MB in the beginning and 156.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 4101.38ms. Allocated memory was 195.0MB in the beginning and 234.9MB in the end (delta: 39.8MB). Free memory was 156.0MB in the beginning and 201.7MB in the end (delta: -45.7MB). There was no memory consumed. 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 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 VAL [i=1, n=0, n=10] [L24] COND TRUE i<=n VAL [i=1, n=0, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=1, n=2, n=10] [L24] i++ VAL [i=2, n=10, n=2] [L24] COND TRUE i<=n VAL [i=2, n=10, n=2] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=2, n=4, n=10] [L24] i++ VAL [i=3, n=4, n=10] [L24] COND TRUE i<=n VAL [i=3, n=4, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=3, n=6, n=10] [L24] i++ VAL [i=4, n=6, n=10] [L24] COND TRUE i<=n VAL [i=4, n=6, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=4, n=8, n=10] [L24] i++ VAL [i=5, n=8, n=10] [L24] COND TRUE i<=n VAL [i=5, n=8, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=5, n=10, n=10] [L24] i++ VAL [i=6, n=10, n=10] [L24] COND TRUE i<=n VAL [i=6, n=10, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=6, n=10, n=12] [L24] i++ VAL [i=7, n=10, n=12] [L24] COND TRUE i<=n VAL [i=7, n=10, n=12] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=7, n=14, n=10] [L24] i++ VAL [i=8, n=10, n=14] [L24] COND TRUE i<=n VAL [i=8, n=14, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=8, n=10, n=16] [L24] i++ VAL [i=9, n=16, n=10] [L24] COND TRUE i<=n VAL [i=9, n=10, n=16] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=9, n=10, n=18] [L24] i++ VAL [i=10, n=18, n=10] [L24] COND TRUE i<=n VAL [i=10, n=10, n=18] [L25] COND FALSE !(i<10) VAL [i=10, n=18, n=10] [L24] i++ VAL [i=11, n=18, n=10] [L24] COND FALSE !(i<=n) VAL [i=11, n=18, n=10] [L28] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.0s, OverallIterations: 6, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 134 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 133 mSDsluCounter, 228 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 166 mSDsCounter, 78 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 523 IncrementalHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 78 mSolverCounterUnsat, 62 mSDtfsCounter, 523 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 205 GetRequests, 94 SyntacticMatches, 6 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=5, InterpolantAutomatonStates: 57, 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, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 183 NumberOfCodeBlocks, 183 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 191 ConstructedInterpolants, 0 QuantifiedInterpolants, 1066 SizeOfPredicates, 6 NumberOfNonLiveVariables, 205 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 28/144 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 RESULT: Ultimate proved your program to be incorrect! [2022-02-14 20:33:01,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...