/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/loop-invgen/nested6.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 14:59:39,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 14:59:39,125 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 14:59:39,153 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-17 14:59:39,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 14:59:39,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 14:59:39,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 14:59:39,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 14:59:39,163 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 14:59:39,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 14:59:39,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 14:59:39,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 14:59:39,170 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 14:59:39,171 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 14:59:39,172 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 14:59:39,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 14:59:39,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 14:59:39,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 14:59:39,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 14:59:39,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 14:59:39,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 14:59:39,189 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 14:59:39,195 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 14:59:39,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 14:59:39,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 14:59:39,196 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 14:59:39,196 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 14:59:39,196 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 14:59:39,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 14:59:39,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 14:59:39,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 14:59:39,197 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 14:59:39,197 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 14:59:39,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 14:59:39,203 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 14:59:39,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 14:59:39,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 14:59:39,203 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 14:59:39,203 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 14:59:39,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 14:59:39,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 14:59:39,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 14:59:39,204 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 14:59:39,204 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 14:59:39,205 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 14:59:39,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 14:59:39,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 14:59:39,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 14:59:39,439 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 14:59:39,439 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 14:59:39,441 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested6.i [2022-03-17 14:59:39,481 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a4e731de/2649b432bc56451dbd2f49e05ee5fd4d/FLAG76ed6614e [2022-03-17 14:59:39,849 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 14:59:39,849 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested6.i [2022-03-17 14:59:39,855 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a4e731de/2649b432bc56451dbd2f49e05ee5fd4d/FLAG76ed6614e [2022-03-17 14:59:40,270 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a4e731de/2649b432bc56451dbd2f49e05ee5fd4d [2022-03-17 14:59:40,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 14:59:40,274 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 14:59:40,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 14:59:40,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 14:59:40,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 14:59:40,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:59:40" (1/1) ... [2022-03-17 14:59:40,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@973714f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:59:40, skipping insertion in model container [2022-03-17 14:59:40,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:59:40" (1/1) ... [2022-03-17 14:59:40,291 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 14:59:40,302 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 14:59:40,413 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested6.i[893,906] [2022-03-17 14:59:40,422 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 14:59:40,427 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 14:59:40,463 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested6.i[893,906] [2022-03-17 14:59:40,466 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 14:59:40,475 INFO L208 MainTranslator]: Completed translation [2022-03-17 14:59:40,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:59:40 WrapperNode [2022-03-17 14:59:40,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 14:59:40,476 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 14:59:40,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 14:59:40,476 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 14:59:40,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:59:40" (1/1) ... [2022-03-17 14:59:40,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:59:40" (1/1) ... [2022-03-17 14:59:40,489 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:59:40" (1/1) ... [2022-03-17 14:59:40,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:59:40" (1/1) ... [2022-03-17 14:59:40,500 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:59:40" (1/1) ... [2022-03-17 14:59:40,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:59:40" (1/1) ... [2022-03-17 14:59:40,510 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:59:40" (1/1) ... [2022-03-17 14:59:40,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 14:59:40,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 14:59:40,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 14:59:40,513 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 14:59:40,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:59:40" (1/1) ... [2022-03-17 14:59:40,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 14:59:40,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:59:40,536 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) [2022-03-17 14:59:40,551 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 [2022-03-17 14:59:40,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 14:59:40,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 14:59:40,571 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 14:59:40,571 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 14:59:40,571 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 14:59:40,571 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 14:59:40,571 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 14:59:40,572 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 14:59:40,572 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-17 14:59:40,572 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-17 14:59:40,572 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 14:59:40,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 14:59:40,572 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 14:59:40,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 14:59:40,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 14:59:40,572 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 14:59:40,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 14:59:40,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 14:59:40,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 14:59:40,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 14:59:40,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 14:59:40,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 14:59:40,618 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 14:59:40,619 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 14:59:40,755 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 14:59:40,770 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 14:59:40,770 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-17 14:59:40,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 02:59:40 BoogieIcfgContainer [2022-03-17 14:59:40,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 14:59:40,772 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 14:59:40,772 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 14:59:40,773 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 14:59:40,775 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 02:59:40" (1/1) ... [2022-03-17 14:59:40,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 02:59:40 BasicIcfg [2022-03-17 14:59:40,786 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 14:59:40,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 14:59:40,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 14:59:40,801 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 14:59:40,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:59:40" (1/4) ... [2022-03-17 14:59:40,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41de567b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:59:40, skipping insertion in model container [2022-03-17 14:59:40,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:59:40" (2/4) ... [2022-03-17 14:59:40,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41de567b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:59:40, skipping insertion in model container [2022-03-17 14:59:40,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 02:59:40" (3/4) ... [2022-03-17 14:59:40,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41de567b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 02:59:40, skipping insertion in model container [2022-03-17 14:59:40,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 02:59:40" (4/4) ... [2022-03-17 14:59:40,804 INFO L111 eAbstractionObserver]: Analyzing ICFG nested6.iJordan [2022-03-17 14:59:40,820 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 14:59:40,821 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 14:59:40,865 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 14:59:40,870 INFO L340 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 [2022-03-17 14:59:40,870 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 14:59:40,890 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 20 states have (on average 1.55) internal successors, (31), 22 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 14:59:40,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-17 14:59:40,895 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:59:40,896 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:59:40,896 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:59:40,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:59:40,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1002152396, now seen corresponding path program 1 times [2022-03-17 14:59:40,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:59:40,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706326291] [2022-03-17 14:59:40,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:59:40,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:59:41,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:41,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:59:41,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:41,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:59:41,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:59:41,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706326291] [2022-03-17 14:59:41,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706326291] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 14:59:41,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 14:59:41,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 14:59:41,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733890083] [2022-03-17 14:59:41,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 14:59:41,167 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 14:59:41,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:59:41,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 14:59:41,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 14:59:41,194 INFO L87 Difference]: Start difference. First operand has 30 states, 20 states have (on average 1.55) internal successors, (31), 22 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-03-17 14:59:41,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:59:41,357 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-03-17 14:59:41,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 14:59:41,359 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 16 [2022-03-17 14:59:41,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:59:41,367 INFO L225 Difference]: With dead ends: 37 [2022-03-17 14:59:41,367 INFO L226 Difference]: Without dead ends: 29 [2022-03-17 14:59:41,369 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 14:59:41,373 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 39 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 14:59:41,373 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 52 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 14:59:41,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-17 14:59:41,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-17 14:59:41,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 14:59:41,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-03-17 14:59:41,407 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 16 [2022-03-17 14:59:41,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:59:41,407 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-03-17 14:59:41,408 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-03-17 14:59:41,408 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-03-17 14:59:41,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 14:59:41,409 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:59:41,409 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:59:41,409 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 14:59:41,409 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:59:41,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:59:41,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1031567308, now seen corresponding path program 1 times [2022-03-17 14:59:41,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:59:41,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322274415] [2022-03-17 14:59:41,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:59:41,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:59:41,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:41,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:59:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:59:41,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:59:41,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322274415] [2022-03-17 14:59:41,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322274415] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 14:59:41,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 14:59:41,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-17 14:59:41,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78801779] [2022-03-17 14:59:41,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 14:59:41,506 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-17 14:59:41,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:59:41,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-17 14:59:41,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-17 14:59:41,507 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-03-17 14:59:41,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:59:41,653 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2022-03-17 14:59:41,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 14:59:41,654 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 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 17 [2022-03-17 14:59:41,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:59:41,656 INFO L225 Difference]: With dead ends: 39 [2022-03-17 14:59:41,656 INFO L226 Difference]: Without dead ends: 39 [2022-03-17 14:59:41,659 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-17 14:59:41,660 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 14:59:41,661 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 45 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 14:59:41,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-17 14:59:41,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2022-03-17 14:59:41,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 14:59:41,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-03-17 14:59:41,670 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 17 [2022-03-17 14:59:41,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:59:41,671 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-03-17 14:59:41,673 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-03-17 14:59:41,673 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-03-17 14:59:41,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-17 14:59:41,677 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:59:41,677 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:59:41,678 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 14:59:41,678 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:59:41,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:59:41,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1187235258, now seen corresponding path program 1 times [2022-03-17 14:59:41,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:59:41,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878181706] [2022-03-17 14:59:41,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:59:41,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:59:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:41,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:59:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:41,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 14:59:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:59:41,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:59:41,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878181706] [2022-03-17 14:59:41,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878181706] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 14:59:41,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 14:59:41,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 14:59:41,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924752873] [2022-03-17 14:59:41,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 14:59:41,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 14:59:41,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:59:41,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 14:59:41,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 14:59:41,766 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 14:59:41,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:59:41,848 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-03-17 14:59:41,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 14:59:41,849 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-03-17 14:59:41,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:59:41,850 INFO L225 Difference]: With dead ends: 44 [2022-03-17 14:59:41,850 INFO L226 Difference]: Without dead ends: 44 [2022-03-17 14:59:41,850 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 14:59:41,851 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 14:59:41,851 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 42 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 14:59:41,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-17 14:59:41,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-17 14:59:41,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 32 states have internal predecessors, (37), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 14:59:41,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-03-17 14:59:41,856 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 21 [2022-03-17 14:59:41,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:59:41,856 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-03-17 14:59:41,856 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 14:59:41,856 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-03-17 14:59:41,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-17 14:59:41,857 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:59:41,857 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:59:41,857 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-17 14:59:41,857 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:59:41,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:59:41,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1420692427, now seen corresponding path program 1 times [2022-03-17 14:59:41,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:59:41,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374123840] [2022-03-17 14:59:41,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:59:41,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:59:41,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:41,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:59:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:41,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-17 14:59:41,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:41,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:59:41,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:59:41,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374123840] [2022-03-17 14:59:41,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374123840] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:59:41,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600350660] [2022-03-17 14:59:41,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:59:41,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:59:41,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:59:41,955 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) [2022-03-17 14:59:41,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 14:59:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:42,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 14:59:42,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:59:42,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 14:59:42,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 14:59:42,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600350660] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 14:59:42,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 14:59:42,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-03-17 14:59:42,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817071598] [2022-03-17 14:59:42,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 14:59:42,217 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 14:59:42,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:59:42,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 14:59:42,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-03-17 14:59:42,217 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 14:59:42,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:59:42,290 INFO L93 Difference]: Finished difference Result 72 states and 94 transitions. [2022-03-17 14:59:42,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 14:59:42,291 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2022-03-17 14:59:42,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:59:42,291 INFO L225 Difference]: With dead ends: 72 [2022-03-17 14:59:42,291 INFO L226 Difference]: Without dead ends: 72 [2022-03-17 14:59:42,292 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-03-17 14:59:42,292 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 22 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 14:59:42,292 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 99 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 14:59:42,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-17 14:59:42,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 48. [2022-03-17 14:59:42,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 14:59:42,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-03-17 14:59:42,298 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 25 [2022-03-17 14:59:42,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:59:42,298 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-03-17 14:59:42,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 14:59:42,299 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-03-17 14:59:42,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-17 14:59:42,299 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:59:42,299 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:59:42,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 14:59:42,500 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:59:42,500 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:59:42,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:59:42,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1754984885, now seen corresponding path program 1 times [2022-03-17 14:59:42,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:59:42,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114296019] [2022-03-17 14:59:42,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:59:42,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:59:42,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:42,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:59:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:42,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-17 14:59:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:42,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-17 14:59:42,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 14:59:42,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:59:42,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114296019] [2022-03-17 14:59:42,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114296019] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:59:42,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636382390] [2022-03-17 14:59:42,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:59:42,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:59:42,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:59:42,652 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) [2022-03-17 14:59:42,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 14:59:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:42,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 14:59:42,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:59:42,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 14:59:42,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:59:42,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 14:59:42,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636382390] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:59:42,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:59:42,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 14 [2022-03-17 14:59:42,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323665615] [2022-03-17 14:59:42,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:59:42,898 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-17 14:59:42,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:59:42,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-17 14:59:42,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-03-17 14:59:42,899 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-17 14:59:43,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:59:43,358 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2022-03-17 14:59:43,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-17 14:59:43,359 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 32 [2022-03-17 14:59:43,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:59:43,362 INFO L225 Difference]: With dead ends: 94 [2022-03-17 14:59:43,362 INFO L226 Difference]: Without dead ends: 94 [2022-03-17 14:59:43,362 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2022-03-17 14:59:43,364 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 89 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 14:59:43,365 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 61 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 14:59:43,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-17 14:59:43,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 66. [2022-03-17 14:59:43,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.25) internal successors, (60), 50 states have internal predecessors, (60), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-17 14:59:43,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2022-03-17 14:59:43,386 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 32 [2022-03-17 14:59:43,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:59:43,386 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2022-03-17 14:59:43,386 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-17 14:59:43,386 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2022-03-17 14:59:43,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-17 14:59:43,387 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:59:43,387 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:59:43,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 14:59:43,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:59:43,595 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:59:43,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:59:43,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1763990758, now seen corresponding path program 1 times [2022-03-17 14:59:43,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:59:43,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208219009] [2022-03-17 14:59:43,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:59:43,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:59:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:43,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:59:43,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:43,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-17 14:59:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:43,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-17 14:59:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:43,704 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-17 14:59:43,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:59:43,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208219009] [2022-03-17 14:59:43,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208219009] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:59:43,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798117613] [2022-03-17 14:59:43,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:59:43,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:59:43,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:59:43,707 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) [2022-03-17 14:59:43,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 14:59:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:43,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 14:59:43,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:59:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-17 14:59:43,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:59:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-17 14:59:43,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798117613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:59:43,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:59:43,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-17 14:59:43,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442780083] [2022-03-17 14:59:43,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:59:44,000 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-17 14:59:44,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:59:44,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-17 14:59:44,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-03-17 14:59:44,002 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-17 14:59:44,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:59:44,236 INFO L93 Difference]: Finished difference Result 86 states and 110 transitions. [2022-03-17 14:59:44,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 14:59:44,236 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 42 [2022-03-17 14:59:44,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:59:44,237 INFO L225 Difference]: With dead ends: 86 [2022-03-17 14:59:44,237 INFO L226 Difference]: Without dead ends: 82 [2022-03-17 14:59:44,237 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2022-03-17 14:59:44,237 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 62 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 14:59:44,238 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 60 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 14:59:44,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-17 14:59:44,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 71. [2022-03-17 14:59:44,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 52 states have (on average 1.25) internal successors, (65), 54 states have internal predecessors, (65), 13 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 14:59:44,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 90 transitions. [2022-03-17 14:59:44,241 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 90 transitions. Word has length 42 [2022-03-17 14:59:44,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:59:44,241 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 90 transitions. [2022-03-17 14:59:44,242 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-17 14:59:44,242 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 90 transitions. [2022-03-17 14:59:44,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-17 14:59:44,242 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:59:44,243 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:59:44,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-17 14:59:44,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:59:44,443 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:59:44,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:59:44,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1192666941, now seen corresponding path program 1 times [2022-03-17 14:59:44,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:59:44,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651292657] [2022-03-17 14:59:44,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:59:44,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:59:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:44,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:59:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:44,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 14:59:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:44,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 14:59:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:44,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-17 14:59:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 14:59:44,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:59:44,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651292657] [2022-03-17 14:59:44,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651292657] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:59:44,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216597805] [2022-03-17 14:59:44,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:59:44,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:59:44,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:59:44,518 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) [2022-03-17 14:59:44,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 14:59:44,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:44,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-17 14:59:44,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:59:44,680 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-17 14:59:44,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:59:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 14:59:44,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216597805] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:59:44,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:59:44,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-03-17 14:59:44,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904444599] [2022-03-17 14:59:44,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:59:44,780 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-17 14:59:44,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:59:44,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-17 14:59:44,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-03-17 14:59:44,780 INFO L87 Difference]: Start difference. First operand 71 states and 90 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-17 14:59:44,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:59:44,984 INFO L93 Difference]: Finished difference Result 95 states and 125 transitions. [2022-03-17 14:59:44,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 14:59:44,984 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 44 [2022-03-17 14:59:44,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:59:44,985 INFO L225 Difference]: With dead ends: 95 [2022-03-17 14:59:44,985 INFO L226 Difference]: Without dead ends: 93 [2022-03-17 14:59:44,985 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2022-03-17 14:59:44,986 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 94 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 14:59:44,986 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 68 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 14:59:44,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-17 14:59:44,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 78. [2022-03-17 14:59:44,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 56 states have (on average 1.25) internal successors, (70), 59 states have internal predecessors, (70), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-17 14:59:44,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2022-03-17 14:59:44,990 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 44 [2022-03-17 14:59:44,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:59:44,990 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2022-03-17 14:59:44,990 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-17 14:59:44,990 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2022-03-17 14:59:44,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-17 14:59:44,991 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:59:44,991 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:59:45,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 14:59:45,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:59:45,195 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:59:45,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:59:45,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1839163900, now seen corresponding path program 1 times [2022-03-17 14:59:45,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:59:45,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288451598] [2022-03-17 14:59:45,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:59:45,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:59:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:45,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:59:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:45,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 14:59:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:45,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 14:59:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:45,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-17 14:59:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:45,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-17 14:59:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:45,251 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-17 14:59:45,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:59:45,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288451598] [2022-03-17 14:59:45,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288451598] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:59:45,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550131083] [2022-03-17 14:59:45,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:59:45,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:59:45,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:59:45,252 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 14:59:45,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 14:59:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:59:45,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-17 14:59:45,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:59:45,421 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 14:59:45,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:59:45,526 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-17 14:59:45,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550131083] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:59:45,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:59:45,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 15 [2022-03-17 14:59:45,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24512123] [2022-03-17 14:59:45,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:59:45,527 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-17 14:59:45,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:59:45,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-17 14:59:45,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-03-17 14:59:45,528 INFO L87 Difference]: Start difference. First operand 78 states and 101 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 13 states have internal predecessors, (60), 5 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-17 14:59:46,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:59:46,153 INFO L93 Difference]: Finished difference Result 123 states and 169 transitions. [2022-03-17 14:59:46,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-17 14:59:46,153 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 13 states have internal predecessors, (60), 5 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 55 [2022-03-17 14:59:46,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:59:46,153 INFO L225 Difference]: With dead ends: 123 [2022-03-17 14:59:46,153 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 14:59:46,154 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=344, Invalid=1462, Unknown=0, NotChecked=0, Total=1806 [2022-03-17 14:59:46,154 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 82 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 14:59:46,155 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 79 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 14:59:46,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 14:59:46,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 14:59:46,155 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) [2022-03-17 14:59:46,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 14:59:46,155 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 55 [2022-03-17 14:59:46,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:59:46,155 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 14:59:46,155 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 13 states have internal predecessors, (60), 5 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-17 14:59:46,156 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 14:59:46,156 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 14:59:46,158 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 14:59:46,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 14:59:46,358 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:59:46,361 INFO L718 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:59:46,362 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 14:59:46,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 02:59:46 BasicIcfg [2022-03-17 14:59:46,364 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 14:59:46,365 INFO L158 Benchmark]: Toolchain (without parser) took 6090.44ms. Allocated memory was 181.4MB in the beginning and 244.3MB in the end (delta: 62.9MB). Free memory was 126.3MB in the beginning and 200.7MB in the end (delta: -74.4MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 14:59:46,365 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 181.4MB. Free memory is still 142.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 14:59:46,365 INFO L158 Benchmark]: CACSL2BoogieTranslator took 192.43ms. Allocated memory was 181.4MB in the beginning and 244.3MB in the end (delta: 62.9MB). Free memory was 126.2MB in the beginning and 217.6MB in the end (delta: -91.4MB). Peak memory consumption was 15.6MB. Max. memory is 8.0GB. [2022-03-17 14:59:46,366 INFO L158 Benchmark]: Boogie Preprocessor took 36.43ms. Allocated memory is still 244.3MB. Free memory was 217.6MB in the beginning and 216.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 14:59:46,366 INFO L158 Benchmark]: RCFGBuilder took 258.66ms. Allocated memory is still 244.3MB. Free memory was 216.1MB in the beginning and 205.1MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-17 14:59:46,366 INFO L158 Benchmark]: IcfgTransformer took 13.84ms. Allocated memory is still 244.3MB. Free memory was 205.1MB in the beginning and 204.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 14:59:46,366 INFO L158 Benchmark]: TraceAbstraction took 5577.24ms. Allocated memory is still 244.3MB. Free memory was 203.5MB in the beginning and 200.7MB in the end (delta: 2.7MB). Peak memory consumption was 3.4MB. Max. memory is 8.0GB. [2022-03-17 14:59:46,367 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 181.4MB. Free memory is still 142.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 192.43ms. Allocated memory was 181.4MB in the beginning and 244.3MB in the end (delta: 62.9MB). Free memory was 126.2MB in the beginning and 217.6MB in the end (delta: -91.4MB). Peak memory consumption was 15.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 36.43ms. Allocated memory is still 244.3MB. Free memory was 217.6MB in the beginning and 216.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 258.66ms. Allocated memory is still 244.3MB. Free memory was 216.1MB in the beginning and 205.1MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 13.84ms. Allocated memory is still 244.3MB. Free memory was 205.1MB in the beginning and 204.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 5577.24ms. Allocated memory is still 244.3MB. Free memory was 203.5MB in the beginning and 200.7MB in the end (delta: 2.7MB). Peak memory consumption was 3.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.5s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 462 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 448 mSDsluCounter, 506 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 323 mSDsCounter, 386 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1699 IncrementalHoareTripleChecker+Invalid, 2085 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 386 mSolverCounterUnsat, 183 mSDtfsCounter, 1699 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 542 GetRequests, 383 SyntacticMatches, 5 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=7, InterpolantAutomatonStates: 100, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 84 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 450 NumberOfCodeBlocks, 450 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 606 ConstructedInterpolants, 0 QuantifiedInterpolants, 1499 SizeOfPredicates, 21 NumberOfNonLiveVariables, 555 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 17 InterpolantComputations, 4 PerfectInterpolantSequences, 398/439 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 RESULT: Ultimate proved your program to be correct! [2022-03-17 14:59:46,402 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...