/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/sendmail-close-angle.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 17:15:25,082 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 17:15:25,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 17:15:25,136 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 17:15:25,136 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 17:15:25,137 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 17:15:25,138 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 17:15:25,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 17:15:25,140 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 17:15:25,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 17:15:25,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 17:15:25,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 17:15:25,142 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 17:15:25,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 17:15:25,143 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 17:15:25,143 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 17:15:25,144 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 17:15:25,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 17:15:25,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 17:15:25,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 17:15:25,147 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 17:15:25,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 17:15:25,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 17:15:25,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 17:15:25,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 17:15:25,152 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 17:15:25,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 17:15:25,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 17:15:25,172 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 17:15:25,172 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 17:15:25,182 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 17:15:25,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 17:15:25,184 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 17:15:25,184 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 17:15:25,184 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 17:15:25,184 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 17:15:25,185 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 17:15:25,185 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 17:15:25,185 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 17:15:25,185 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 17:15:25,185 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 17:15:25,186 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 17:15:25,186 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 17:15:25,186 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 17:15:25,186 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 17:15:25,186 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 17:15:25,186 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 17:15:25,186 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 17:15:25,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 17:15:25,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 17:15:25,186 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 17:15:25,187 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 17:15:25,187 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 17:15:25,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 17:15:25,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 17:15:25,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 17:15:25,404 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 17:15:25,404 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 17:15:25,405 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2022-03-18 17:15:25,456 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdc9cff20/7a66284bf1c649108e5f5e770385654e/FLAGfafdb654d [2022-03-18 17:15:25,797 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 17:15:25,798 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2022-03-18 17:15:25,803 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdc9cff20/7a66284bf1c649108e5f5e770385654e/FLAGfafdb654d [2022-03-18 17:15:26,210 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdc9cff20/7a66284bf1c649108e5f5e770385654e [2022-03-18 17:15:26,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 17:15:26,214 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 17:15:26,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 17:15:26,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 17:15:26,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 17:15:26,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:15:26" (1/1) ... [2022-03-18 17:15:26,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2482aa0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:15:26, skipping insertion in model container [2022-03-18 17:15:26,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:15:26" (1/1) ... [2022-03-18 17:15:26,224 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 17:15:26,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 17:15:26,408 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/sendmail-close-angle.i[893,906] [2022-03-18 17:15:26,428 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 17:15:26,437 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 17:15:26,456 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/sendmail-close-angle.i[893,906] [2022-03-18 17:15:26,472 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 17:15:26,483 INFO L208 MainTranslator]: Completed translation [2022-03-18 17:15:26,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:15:26 WrapperNode [2022-03-18 17:15:26,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 17:15:26,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 17:15:26,494 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 17:15:26,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 17:15:26,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:15:26" (1/1) ... [2022-03-18 17:15:26,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:15:26" (1/1) ... [2022-03-18 17:15:26,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:15:26" (1/1) ... [2022-03-18 17:15:26,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:15:26" (1/1) ... [2022-03-18 17:15:26,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:15:26" (1/1) ... [2022-03-18 17:15:26,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:15:26" (1/1) ... [2022-03-18 17:15:26,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:15:26" (1/1) ... [2022-03-18 17:15:26,529 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 17:15:26,530 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 17:15:26,530 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 17:15:26,530 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 17:15:26,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:15:26" (1/1) ... [2022-03-18 17:15:26,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 17:15:26,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:15:26,570 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) [2022-03-18 17:15:26,581 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 [2022-03-18 17:15:26,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 17:15:26,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 17:15:26,603 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 17:15:26,603 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 17:15:26,603 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 17:15:26,603 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 17:15:26,604 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 17:15:26,604 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 17:15:26,604 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-18 17:15:26,604 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-18 17:15:26,604 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 17:15:26,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 17:15:26,604 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 17:15:26,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 17:15:26,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 17:15:26,605 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 17:15:26,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 17:15:26,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 17:15:26,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 17:15:26,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 17:15:26,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 17:15:26,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 17:15:26,670 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 17:15:26,672 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 17:15:26,805 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 17:15:26,811 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 17:15:26,811 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 17:15:26,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:15:26 BoogieIcfgContainer [2022-03-18 17:15:26,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 17:15:26,813 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 17:15:26,813 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 17:15:26,827 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 17:15:26,830 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:15:26" (1/1) ... [2022-03-18 17:15:26,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 05:15:26 BasicIcfg [2022-03-18 17:15:26,842 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 17:15:26,843 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 17:15:26,843 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 17:15:26,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 17:15:26,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 05:15:26" (1/4) ... [2022-03-18 17:15:26,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b998878 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:15:26, skipping insertion in model container [2022-03-18 17:15:26,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:15:26" (2/4) ... [2022-03-18 17:15:26,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b998878 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:15:26, skipping insertion in model container [2022-03-18 17:15:26,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:15:26" (3/4) ... [2022-03-18 17:15:26,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b998878 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 05:15:26, skipping insertion in model container [2022-03-18 17:15:26,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 05:15:26" (4/4) ... [2022-03-18 17:15:26,847 INFO L111 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.iJordan [2022-03-18 17:15:26,850 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 17:15:26,851 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 17:15:26,921 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 17:15:26,940 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 [2022-03-18 17:15:26,940 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 17:15:26,949 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 21 states have (on average 1.380952380952381) internal successors, (29), 23 states have internal predecessors, (29), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 17:15:26,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-18 17:15:26,954 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:15:26,954 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:15:26,954 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:15:26,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:15:26,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1933732557, now seen corresponding path program 1 times [2022-03-18 17:15:26,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:15:26,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821282263] [2022-03-18 17:15:26,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:15:26,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:15:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:27,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:15:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:15:27,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:15:27,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821282263] [2022-03-18 17:15:27,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821282263] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:15:27,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:15:27,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 17:15:27,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755871111] [2022-03-18 17:15:27,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:15:27,160 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 17:15:27,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:15:27,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 17:15:27,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 17:15:27,187 INFO L87 Difference]: Start difference. First operand has 36 states, 21 states have (on average 1.380952380952381) internal successors, (29), 23 states have internal predecessors, (29), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-03-18 17:15:27,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:15:27,253 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-03-18 17:15:27,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 17:15:27,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 15 [2022-03-18 17:15:27,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:15:27,261 INFO L225 Difference]: With dead ends: 36 [2022-03-18 17:15:27,261 INFO L226 Difference]: Without dead ends: 30 [2022-03-18 17:15:27,262 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 17:15:27,265 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:15:27,265 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:15:27,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-18 17:15:27,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-18 17:15:27,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 10 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 17:15:27,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-03-18 17:15:27,296 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 15 [2022-03-18 17:15:27,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:15:27,296 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-03-18 17:15:27,296 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-03-18 17:15:27,296 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-03-18 17:15:27,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-18 17:15:27,297 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:15:27,297 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:15:27,297 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 17:15:27,297 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:15:27,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:15:27,298 INFO L85 PathProgramCache]: Analyzing trace with hash 213262551, now seen corresponding path program 1 times [2022-03-18 17:15:27,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:15:27,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436254673] [2022-03-18 17:15:27,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:15:27,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:15:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:27,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:15:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:15:27,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:15:27,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436254673] [2022-03-18 17:15:27,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436254673] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:15:27,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:15:27,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 17:15:27,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129554754] [2022-03-18 17:15:27,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:15:27,362 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 17:15:27,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:15:27,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 17:15:27,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 17:15:27,363 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. 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) [2022-03-18 17:15:27,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:15:27,467 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2022-03-18 17:15:27,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 17:15:27,468 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 [2022-03-18 17:15:27,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:15:27,468 INFO L225 Difference]: With dead ends: 34 [2022-03-18 17:15:27,468 INFO L226 Difference]: Without dead ends: 34 [2022-03-18 17:15:27,469 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 17:15:27,470 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 29 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:15:27,470 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 42 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:15:27,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-18 17:15:27,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-18 17:15:27,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 17:15:27,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-03-18 17:15:27,476 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 16 [2022-03-18 17:15:27,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:15:27,476 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-03-18 17:15:27,476 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) [2022-03-18 17:15:27,476 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-03-18 17:15:27,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-18 17:15:27,477 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:15:27,477 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] [2022-03-18 17:15:27,477 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 17:15:27,477 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:15:27,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:15:27,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1077134525, now seen corresponding path program 1 times [2022-03-18 17:15:27,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:15:27,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539442605] [2022-03-18 17:15:27,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:15:27,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:15:27,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:27,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:15:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:27,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 17:15:27,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:27,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:15:27,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:15:27,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539442605] [2022-03-18 17:15:27,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539442605] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:15:27,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:15:27,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 17:15:27,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77984942] [2022-03-18 17:15:27,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:15:27,560 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 17:15:27,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:15:27,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 17:15:27,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-18 17:15:27,561 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 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) [2022-03-18 17:15:27,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:15:27,703 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2022-03-18 17:15:27,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 17:15:27,703 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 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 [2022-03-18 17:15:27,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:15:27,704 INFO L225 Difference]: With dead ends: 47 [2022-03-18 17:15:27,704 INFO L226 Difference]: Without dead ends: 47 [2022-03-18 17:15:27,706 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-18 17:15:27,707 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 44 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:15:27,707 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:15:27,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-18 17:15:27,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-03-18 17:15:27,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 29 states have internal predecessors, (31), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 17:15:27,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2022-03-18 17:15:27,712 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 21 [2022-03-18 17:15:27,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:15:27,712 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2022-03-18 17:15:27,713 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 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) [2022-03-18 17:15:27,713 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2022-03-18 17:15:27,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 17:15:27,713 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:15:27,714 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:15:27,714 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 17:15:27,714 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:15:27,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:15:27,714 INFO L85 PathProgramCache]: Analyzing trace with hash -2113482804, now seen corresponding path program 1 times [2022-03-18 17:15:27,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:15:27,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618681918] [2022-03-18 17:15:27,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:15:27,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:15:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:27,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:15:27,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:27,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 17:15:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:27,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 17:15:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 17:15:27,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:15:27,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618681918] [2022-03-18 17:15:27,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618681918] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:15:27,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:15:27,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 17:15:27,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002801647] [2022-03-18 17:15:27,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:15:27,775 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 17:15:27,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:15:27,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 17:15:27,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-18 17:15:27,775 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 17:15:27,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:15:27,916 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2022-03-18 17:15:27,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 17:15:27,916 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-03-18 17:15:27,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:15:27,917 INFO L225 Difference]: With dead ends: 54 [2022-03-18 17:15:27,917 INFO L226 Difference]: Without dead ends: 54 [2022-03-18 17:15:27,918 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-18 17:15:27,918 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 38 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:15:27,919 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 66 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:15:27,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-18 17:15:27,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2022-03-18 17:15:27,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 32 states have internal predecessors, (34), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 17:15:27,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2022-03-18 17:15:27,924 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 29 [2022-03-18 17:15:27,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:15:27,924 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2022-03-18 17:15:27,924 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 17:15:27,924 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2022-03-18 17:15:27,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 17:15:27,925 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:15:27,925 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:15:27,925 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 17:15:27,925 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:15:27,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:15:27,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1308577884, now seen corresponding path program 1 times [2022-03-18 17:15:27,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:15:27,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244470412] [2022-03-18 17:15:27,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:15:27,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:15:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:27,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:15:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:27,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 17:15:27,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:27,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 17:15:27,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:28,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-18 17:15:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:28,004 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 17:15:28,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:15:28,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244470412] [2022-03-18 17:15:28,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244470412] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:15:28,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:15:28,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 17:15:28,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947281934] [2022-03-18 17:15:28,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:15:28,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 17:15:28,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:15:28,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 17:15:28,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-03-18 17:15:28,006 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 17:15:28,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:15:28,167 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2022-03-18 17:15:28,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 17:15:28,168 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-03-18 17:15:28,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:15:28,168 INFO L225 Difference]: With dead ends: 73 [2022-03-18 17:15:28,168 INFO L226 Difference]: Without dead ends: 68 [2022-03-18 17:15:28,169 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-18 17:15:28,169 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 69 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:15:28,170 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 45 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:15:28,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-18 17:15:28,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-03-18 17:15:28,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.125) internal successors, (45), 43 states have internal predecessors, (45), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 17:15:28,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2022-03-18 17:15:28,175 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 32 [2022-03-18 17:15:28,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:15:28,175 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2022-03-18 17:15:28,175 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 17:15:28,175 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2022-03-18 17:15:28,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 17:15:28,176 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:15:28,176 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:15:28,176 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-18 17:15:28,176 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:15:28,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:15:28,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1447644068, now seen corresponding path program 1 times [2022-03-18 17:15:28,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:15:28,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242671188] [2022-03-18 17:15:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:15:28,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:15:28,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:28,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:15:28,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:28,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 17:15:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:28,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 17:15:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:28,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 17:15:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:28,243 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 17:15:28,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:15:28,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242671188] [2022-03-18 17:15:28,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242671188] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:15:28,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:15:28,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 17:15:28,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558134501] [2022-03-18 17:15:28,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:15:28,244 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 17:15:28,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:15:28,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 17:15:28,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 17:15:28,244 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 17:15:28,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:15:28,443 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2022-03-18 17:15:28,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 17:15:28,443 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2022-03-18 17:15:28,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:15:28,444 INFO L225 Difference]: With dead ends: 75 [2022-03-18 17:15:28,444 INFO L226 Difference]: Without dead ends: 75 [2022-03-18 17:15:28,444 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-18 17:15:28,445 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 85 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:15:28,445 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 56 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:15:28,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-18 17:15:28,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2022-03-18 17:15:28,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 46 states have internal predecessors, (48), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 17:15:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2022-03-18 17:15:28,450 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 34 [2022-03-18 17:15:28,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:15:28,450 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2022-03-18 17:15:28,450 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 17:15:28,450 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2022-03-18 17:15:28,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-18 17:15:28,451 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:15:28,452 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:15:28,452 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-18 17:15:28,452 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:15:28,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:15:28,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1060067119, now seen corresponding path program 1 times [2022-03-18 17:15:28,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:15:28,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91597940] [2022-03-18 17:15:28,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:15:28,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:15:28,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:28,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:15:28,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:28,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 17:15:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:28,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 17:15:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:28,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 17:15:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:28,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 17:15:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:28,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 17:15:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:28,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-18 17:15:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:28,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-18 17:15:28,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:28,567 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 17:15:28,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:15:28,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91597940] [2022-03-18 17:15:28,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91597940] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:15:28,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770542211] [2022-03-18 17:15:28,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:15:28,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:15:28,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:15:28,580 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) [2022-03-18 17:15:28,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 17:15:28,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:28,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 17:15:28,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:15:29,001 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 17:15:29,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:15:29,169 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 17:15:29,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770542211] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:15:29,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:15:29,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-18 17:15:29,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139049211] [2022-03-18 17:15:29,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:15:29,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 17:15:29,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:15:29,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 17:15:29,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-03-18 17:15:29,173 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 18 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2022-03-18 17:15:29,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:15:29,725 INFO L93 Difference]: Finished difference Result 113 states and 148 transitions. [2022-03-18 17:15:29,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 17:15:29,725 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) Word has length 57 [2022-03-18 17:15:29,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:15:29,727 INFO L225 Difference]: With dead ends: 113 [2022-03-18 17:15:29,727 INFO L226 Difference]: Without dead ends: 100 [2022-03-18 17:15:29,728 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2022-03-18 17:15:29,729 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 118 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 17:15:29,729 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 70 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 17:15:29,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-18 17:15:29,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 92. [2022-03-18 17:15:29,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 59 states have internal predecessors, (61), 26 states have call successors, (26), 10 states have call predecessors, (26), 9 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-18 17:15:29,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 111 transitions. [2022-03-18 17:15:29,750 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 111 transitions. Word has length 57 [2022-03-18 17:15:29,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:15:29,750 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 111 transitions. [2022-03-18 17:15:29,750 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2022-03-18 17:15:29,750 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 111 transitions. [2022-03-18 17:15:29,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-18 17:15:29,751 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:15:29,751 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:15:29,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 17:15:29,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:15:29,967 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:15:29,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:15:29,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1512463065, now seen corresponding path program 1 times [2022-03-18 17:15:29,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:15:29,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337070600] [2022-03-18 17:15:29,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:15:29,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:15:29,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:30,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:15:30,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:30,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 17:15:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:30,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 17:15:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:30,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 17:15:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:30,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 17:15:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:30,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-18 17:15:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:30,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 17:15:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:30,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-18 17:15:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:30,089 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 17:15:30,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:15:30,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337070600] [2022-03-18 17:15:30,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337070600] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:15:30,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914353772] [2022-03-18 17:15:30,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:15:30,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:15:30,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:15:30,093 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) [2022-03-18 17:15:30,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 17:15:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:30,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 17:15:30,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:15:30,369 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 17:15:30,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:15:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 17:15:30,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914353772] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:15:30,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:15:30,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 16 [2022-03-18 17:15:30,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623417069] [2022-03-18 17:15:30,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:15:30,485 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 17:15:30,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:15:30,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 17:15:30,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-03-18 17:15:30,486 INFO L87 Difference]: Start difference. First operand 92 states and 111 transitions. Second operand has 16 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 8 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2022-03-18 17:15:30,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:15:30,699 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2022-03-18 17:15:30,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 17:15:30,699 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 8 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) Word has length 59 [2022-03-18 17:15:30,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:15:30,702 INFO L225 Difference]: With dead ends: 96 [2022-03-18 17:15:30,702 INFO L226 Difference]: Without dead ends: 96 [2022-03-18 17:15:30,703 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 125 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-03-18 17:15:30,704 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 78 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:15:30,704 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 71 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:15:30,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-18 17:15:30,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-03-18 17:15:30,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 62 states have internal predecessors, (64), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-18 17:15:30,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 114 transitions. [2022-03-18 17:15:30,720 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 114 transitions. Word has length 59 [2022-03-18 17:15:30,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:15:30,720 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 114 transitions. [2022-03-18 17:15:30,720 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 8 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2022-03-18 17:15:30,720 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 114 transitions. [2022-03-18 17:15:30,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-18 17:15:30,724 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:15:30,724 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:15:30,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 17:15:30,935 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-03-18 17:15:30,936 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:15:30,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:15:30,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1765383868, now seen corresponding path program 2 times [2022-03-18 17:15:30,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:15:30,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524221245] [2022-03-18 17:15:30,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:15:30,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:15:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:31,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:15:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:31,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 17:15:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:31,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 17:15:31,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:31,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 17:15:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:31,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 17:15:31,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:31,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-18 17:15:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:31,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 17:15:31,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:31,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-18 17:15:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:31,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-18 17:15:31,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:31,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-18 17:15:31,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:31,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-18 17:15:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:31,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-03-18 17:15:31,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:31,128 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 48 proven. 31 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-03-18 17:15:31,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:15:31,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524221245] [2022-03-18 17:15:31,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524221245] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:15:31,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514756024] [2022-03-18 17:15:31,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 17:15:31,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:15:31,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:15:31,129 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) [2022-03-18 17:15:31,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 17:15:31,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 17:15:31,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:15:31,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 17:15:31,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:15:31,437 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-18 17:15:31,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:15:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-18 17:15:31,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514756024] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:15:31,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:15:31,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-03-18 17:15:31,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119702296] [2022-03-18 17:15:31,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:15:31,631 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 17:15:31,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:15:31,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 17:15:31,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-03-18 17:15:31,632 INFO L87 Difference]: Start difference. First operand 96 states and 114 transitions. Second operand has 27 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 12 states have call successors, (38), 4 states have call predecessors, (38), 2 states have return successors, (33), 12 states have call predecessors, (33), 12 states have call successors, (33) [2022-03-18 17:15:32,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:15:32,411 INFO L93 Difference]: Finished difference Result 111 states and 133 transitions. [2022-03-18 17:15:32,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 17:15:32,411 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 12 states have call successors, (38), 4 states have call predecessors, (38), 2 states have return successors, (33), 12 states have call predecessors, (33), 12 states have call successors, (33) Word has length 84 [2022-03-18 17:15:32,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:15:32,412 INFO L225 Difference]: With dead ends: 111 [2022-03-18 17:15:32,412 INFO L226 Difference]: Without dead ends: 111 [2022-03-18 17:15:32,413 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 177 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=479, Invalid=1971, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 17:15:32,413 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 139 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 17:15:32,413 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 92 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 17:15:32,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-18 17:15:32,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2022-03-18 17:15:32,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 65 states have internal predecessors, (67), 26 states have call successors, (26), 12 states have call predecessors, (26), 11 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-18 17:15:32,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2022-03-18 17:15:32,417 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 84 [2022-03-18 17:15:32,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:15:32,417 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2022-03-18 17:15:32,417 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 12 states have call successors, (38), 4 states have call predecessors, (38), 2 states have return successors, (33), 12 states have call predecessors, (33), 12 states have call successors, (33) [2022-03-18 17:15:32,417 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2022-03-18 17:15:32,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-18 17:15:32,418 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:15:32,418 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:15:32,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 17:15:32,633 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:15:32,633 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:15:32,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:15:32,634 INFO L85 PathProgramCache]: Analyzing trace with hash 446349519, now seen corresponding path program 2 times [2022-03-18 17:15:32,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:15:32,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534882178] [2022-03-18 17:15:32,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:15:32,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:15:32,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:32,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:15:32,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:32,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 17:15:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:32,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 17:15:32,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:32,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 17:15:32,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:32,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 17:15:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:32,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-18 17:15:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:32,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 17:15:32,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:32,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-18 17:15:32,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:32,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-18 17:15:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:32,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-18 17:15:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:32,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-18 17:15:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:32,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-03-18 17:15:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:32,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-18 17:15:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:32,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-18 17:15:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:32,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-03-18 17:15:32,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:32,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-18 17:15:32,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:15:32,809 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 68 proven. 31 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2022-03-18 17:15:32,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:15:32,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534882178] [2022-03-18 17:15:32,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534882178] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:15:32,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263185095] [2022-03-18 17:15:32,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 17:15:32,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:15:32,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:15:32,816 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) [2022-03-18 17:15:32,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 17:15:32,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 17:15:32,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:15:32,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 17:15:32,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:15:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 68 proven. 22 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2022-03-18 17:15:33,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:15:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 68 proven. 22 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2022-03-18 17:15:33,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263185095] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:15:33,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:15:33,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 15 [2022-03-18 17:15:33,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035368117] [2022-03-18 17:15:33,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:15:33,364 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 17:15:33,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:15:33,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 17:15:33,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-03-18 17:15:33,364 INFO L87 Difference]: Start difference. First operand 100 states and 117 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 6 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-18 17:15:33,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:15:33,645 INFO L93 Difference]: Finished difference Result 98 states and 115 transitions. [2022-03-18 17:15:33,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 17:15:33,645 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 6 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) Word has length 107 [2022-03-18 17:15:33,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:15:33,646 INFO L225 Difference]: With dead ends: 98 [2022-03-18 17:15:33,646 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 17:15:33,646 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 240 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2022-03-18 17:15:33,647 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 44 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:15:33,647 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 68 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:15:33,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 17:15:33,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 17:15:33,647 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) [2022-03-18 17:15:33,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 17:15:33,647 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 107 [2022-03-18 17:15:33,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:15:33,648 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 17:15:33,648 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 6 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-18 17:15:33,648 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 17:15:33,648 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 17:15:33,650 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 17:15:33,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 17:15:33,867 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:15:33,869 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2022-03-18 17:15:33,870 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 17:15:33,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 05:15:33 BasicIcfg [2022-03-18 17:15:33,872 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 17:15:33,872 INFO L158 Benchmark]: Toolchain (without parser) took 7658.14ms. Allocated memory was 210.8MB in the beginning and 313.5MB in the end (delta: 102.8MB). Free memory was 156.3MB in the beginning and 254.3MB in the end (delta: -98.0MB). Peak memory consumption was 5.3MB. Max. memory is 8.0GB. [2022-03-18 17:15:33,872 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 210.8MB. Free memory is still 172.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 17:15:33,873 INFO L158 Benchmark]: CACSL2BoogieTranslator took 277.92ms. Allocated memory is still 210.8MB. Free memory was 156.1MB in the beginning and 182.0MB in the end (delta: -25.9MB). Peak memory consumption was 4.9MB. Max. memory is 8.0GB. [2022-03-18 17:15:33,873 INFO L158 Benchmark]: Boogie Preprocessor took 35.61ms. Allocated memory is still 210.8MB. Free memory was 182.0MB in the beginning and 180.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-18 17:15:33,873 INFO L158 Benchmark]: RCFGBuilder took 282.52ms. Allocated memory is still 210.8MB. Free memory was 180.5MB in the beginning and 169.0MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-18 17:15:33,873 INFO L158 Benchmark]: IcfgTransformer took 28.99ms. Allocated memory is still 210.8MB. Free memory was 169.0MB in the beginning and 167.6MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 17:15:33,873 INFO L158 Benchmark]: TraceAbstraction took 7029.19ms. Allocated memory was 210.8MB in the beginning and 313.5MB in the end (delta: 102.8MB). Free memory was 167.3MB in the beginning and 254.3MB in the end (delta: -87.0MB). Peak memory consumption was 16.1MB. Max. memory is 8.0GB. [2022-03-18 17:15:33,874 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 210.8MB. Free memory is still 172.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 277.92ms. Allocated memory is still 210.8MB. Free memory was 156.1MB in the beginning and 182.0MB in the end (delta: -25.9MB). Peak memory consumption was 4.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.61ms. Allocated memory is still 210.8MB. Free memory was 182.0MB in the beginning and 180.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 282.52ms. Allocated memory is still 210.8MB. Free memory was 180.5MB in the beginning and 169.0MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 28.99ms. Allocated memory is still 210.8MB. Free memory was 169.0MB in the beginning and 167.6MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 7029.19ms. Allocated memory was 210.8MB in the beginning and 313.5MB in the end (delta: 102.8MB). Free memory was 167.3MB in the beginning and 254.3MB in the end (delta: -87.0MB). Peak memory consumption was 16.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.0s, OverallIterations: 10, TraceHistogramMax: 16, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 676 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 668 mSDsluCounter, 600 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 301 mSDsCounter, 927 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2556 IncrementalHoareTripleChecker+Invalid, 3483 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 927 mSolverCounterUnsat, 299 mSDtfsCounter, 2556 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 893 GetRequests, 699 SyntacticMatches, 14 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=9, InterpolantAutomatonStates: 114, 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, 10 MinimizatonAttempts, 33 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 761 NumberOfCodeBlocks, 761 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 1050 ConstructedInterpolants, 0 QuantifiedInterpolants, 3625 SizeOfPredicates, 16 NumberOfNonLiveVariables, 688 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 2730/2923 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! [2022-03-18 17:15:33,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...