/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loop-acceleration/diamond_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 08:17:35,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 08:17:35,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 08:17:35,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 08:17:35,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 08:17:35,172 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 08:17:35,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 08:17:35,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 08:17:35,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 08:17:35,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 08:17:35,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 08:17:35,183 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 08:17:35,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 08:17:35,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 08:17:35,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 08:17:35,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 08:17:35,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 08:17:35,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 08:17:35,190 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 08:17:35,194 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 08:17:35,196 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 08:17:35,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 08:17:35,199 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 08:17:35,199 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 08:17:35,200 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 08:17:35,201 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 08:17:35,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 08:17:35,206 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 08:17:35,210 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 08:17:35,211 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 08:17:35,233 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 08:17:35,234 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 08:17:35,234 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 08:17:35,234 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 08:17:35,235 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 08:17:35,235 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 08:17:35,235 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 08:17:35,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 08:17:35,235 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 08:17:35,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 08:17:35,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 08:17:35,236 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 08:17:35,236 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 08:17:35,236 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 08:17:35,236 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 08:17:35,236 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 08:17:35,237 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 08:17:35,237 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 08:17:35,237 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 08:17:35,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:17:35,237 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 08:17:35,237 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 08:17:35,237 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 08:17:35,237 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 08:17:35,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 08:17:35,238 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 08:17:35,238 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 08:17:35,238 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 08:17:35,239 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 08:17:35,239 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 08:17:35,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 08:17:35,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 08:17:35,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 08:17:35,460 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 08:17:35,461 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 08:17:35,462 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/diamond_1-2.c [2022-03-20 08:17:35,521 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aebfefb00/26fa1cd785fd4de793168f33bddb82a3/FLAG3c10d6a26 [2022-03-20 08:17:35,879 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 08:17:35,879 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_1-2.c [2022-03-20 08:17:35,883 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aebfefb00/26fa1cd785fd4de793168f33bddb82a3/FLAG3c10d6a26 [2022-03-20 08:17:36,298 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aebfefb00/26fa1cd785fd4de793168f33bddb82a3 [2022-03-20 08:17:36,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 08:17:36,302 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 08:17:36,303 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 08:17:36,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 08:17:36,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 08:17:36,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:17:36" (1/1) ... [2022-03-20 08:17:36,308 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f2ea885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:36, skipping insertion in model container [2022-03-20 08:17:36,308 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:17:36" (1/1) ... [2022-03-20 08:17:36,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 08:17:36,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 08:17:36,461 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-acceleration/diamond_1-2.c[373,386] [2022-03-20 08:17:36,470 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:17:36,477 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 08:17:36,486 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-acceleration/diamond_1-2.c[373,386] [2022-03-20 08:17:36,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:17:36,503 INFO L208 MainTranslator]: Completed translation [2022-03-20 08:17:36,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:36 WrapperNode [2022-03-20 08:17:36,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 08:17:36,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 08:17:36,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 08:17:36,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 08:17:36,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:36" (1/1) ... [2022-03-20 08:17:36,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:36" (1/1) ... [2022-03-20 08:17:36,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:36" (1/1) ... [2022-03-20 08:17:36,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:36" (1/1) ... [2022-03-20 08:17:36,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:36" (1/1) ... [2022-03-20 08:17:36,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:36" (1/1) ... [2022-03-20 08:17:36,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:36" (1/1) ... [2022-03-20 08:17:36,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 08:17:36,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 08:17:36,536 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 08:17:36,536 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 08:17:36,537 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:36" (1/1) ... [2022-03-20 08:17:36,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:17:36,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:17:36,570 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) [2022-03-20 08:17:36,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 08:17:36,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 08:17:36,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 08:17:36,598 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 08:17:36,598 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 08:17:36,598 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 08:17:36,598 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 08:17:36,599 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 08:17:36,599 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 08:17:36,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 08:17:36,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 08:17:36,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 08:17:36,600 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 08:17:36,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 08:17:36,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 08:17:36,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 08:17:36,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 08:17:36,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 08:17:36,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 08:17:36,649 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 08:17:36,650 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 08:17:36,778 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 08:17:36,782 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 08:17:36,782 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 08:17:36,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:17:36 BoogieIcfgContainer [2022-03-20 08:17:36,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 08:17:36,784 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 08:17:36,784 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 08:17:36,785 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 08:17:36,787 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:17:36" (1/1) ... [2022-03-20 08:17:36,788 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 08:17:36,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:17:36 BasicIcfg [2022-03-20 08:17:36,797 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 08:17:36,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 08:17:36,812 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 08:17:36,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 08:17:36,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:17:36" (1/4) ... [2022-03-20 08:17:36,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b3a8ee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:17:36, skipping insertion in model container [2022-03-20 08:17:36,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:36" (2/4) ... [2022-03-20 08:17:36,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b3a8ee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:17:36, skipping insertion in model container [2022-03-20 08:17:36,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:17:36" (3/4) ... [2022-03-20 08:17:36,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b3a8ee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:17:36, skipping insertion in model container [2022-03-20 08:17:36,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:17:36" (4/4) ... [2022-03-20 08:17:36,817 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_1-2.cqvasr [2022-03-20 08:17:36,821 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 08:17:36,831 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 08:17:36,874 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 08:17:36,886 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 08:17:36,887 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 08:17:36,911 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 08:17:36,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 08:17:36,914 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:17:36,915 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:17:36,915 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:17:36,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:17:36,920 INFO L85 PathProgramCache]: Analyzing trace with hash -756157467, now seen corresponding path program 1 times [2022-03-20 08:17:36,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:17:36,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620252686] [2022-03-20 08:17:36,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:36,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:17:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:37,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:17:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:37,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:17:37,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620252686] [2022-03-20 08:17:37,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620252686] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:17:37,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:17:37,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 08:17:37,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688512493] [2022-03-20 08:17:37,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:17:37,067 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 08:17:37,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:17:37,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 08:17:37,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:17:37,094 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:37,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:17:37,138 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-03-20 08:17:37,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 08:17:37,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-20 08:17:37,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:17:37,147 INFO L225 Difference]: With dead ends: 30 [2022-03-20 08:17:37,147 INFO L226 Difference]: Without dead ends: 13 [2022-03-20 08:17:37,150 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:17:37,153 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:17:37,154 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 22 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:17:37,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-03-20 08:17:37,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-03-20 08:17:37,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:37,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-03-20 08:17:37,180 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-03-20 08:17:37,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:17:37,180 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-03-20 08:17:37,181 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:37,182 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-03-20 08:17:37,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 08:17:37,182 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:17:37,183 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:17:37,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 08:17:37,183 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:17:37,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:17:37,186 INFO L85 PathProgramCache]: Analyzing trace with hash -755233946, now seen corresponding path program 1 times [2022-03-20 08:17:37,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:17:37,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131493743] [2022-03-20 08:17:37,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:37,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:17:37,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:37,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:17:37,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:37,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:37,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:17:37,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131493743] [2022-03-20 08:17:37,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131493743] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:17:37,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:17:37,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 08:17:37,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108818787] [2022-03-20 08:17:37,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:17:37,315 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 08:17:37,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:17:37,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 08:17:37,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 08:17:37,317 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:37,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:17:37,351 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-03-20 08:17:37,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 08:17:37,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-20 08:17:37,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:17:37,353 INFO L225 Difference]: With dead ends: 20 [2022-03-20 08:17:37,353 INFO L226 Difference]: Without dead ends: 15 [2022-03-20 08:17:37,356 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 08:17:37,358 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:17:37,358 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 18 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:17:37,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-20 08:17:37,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-03-20 08:17:37,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:37,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-03-20 08:17:37,368 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-03-20 08:17:37,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:17:37,373 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-03-20 08:17:37,373 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:37,374 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-03-20 08:17:37,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-20 08:17:37,374 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:17:37,374 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:17:37,374 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 08:17:37,374 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:17:37,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:17:37,380 INFO L85 PathProgramCache]: Analyzing trace with hash 980092676, now seen corresponding path program 1 times [2022-03-20 08:17:37,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:17:37,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146082378] [2022-03-20 08:17:37,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:37,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:17:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:37,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:17:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:37,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:17:37,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146082378] [2022-03-20 08:17:37,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146082378] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:17:37,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708926722] [2022-03-20 08:17:37,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:37,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:17:37,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:17:37,482 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:17:37,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 08:17:37,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:37,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 08:17:37,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:17:37,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:37,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:17:37,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:37,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708926722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:17:37,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:17:37,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-20 08:17:37,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972115287] [2022-03-20 08:17:37,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:17:37,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 08:17:37,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:17:37,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 08:17:37,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-20 08:17:37,609 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:37,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:17:37,673 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2022-03-20 08:17:37,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 08:17:37,674 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-20 08:17:37,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:17:37,674 INFO L225 Difference]: With dead ends: 25 [2022-03-20 08:17:37,674 INFO L226 Difference]: Without dead ends: 20 [2022-03-20 08:17:37,675 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-03-20 08:17:37,675 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:17:37,676 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 23 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:17:37,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-20 08:17:37,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-20 08:17:37,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:37,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-03-20 08:17:37,679 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2022-03-20 08:17:37,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:17:37,680 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-03-20 08:17:37,680 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:37,680 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-03-20 08:17:37,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 08:17:37,680 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:17:37,680 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:17:37,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 08:17:37,900 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:17:37,901 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:17:37,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:17:37,901 INFO L85 PathProgramCache]: Analyzing trace with hash -341862240, now seen corresponding path program 1 times [2022-03-20 08:17:37,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:17:37,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406867965] [2022-03-20 08:17:37,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:37,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:17:37,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:37,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:17:37,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:38,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:17:38,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406867965] [2022-03-20 08:17:38,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406867965] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:17:38,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630440048] [2022-03-20 08:17:38,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:38,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:17:38,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:17:38,006 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:17:38,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 08:17:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:38,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 08:17:38,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:17:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:38,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:17:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:38,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630440048] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:17:38,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:17:38,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-20 08:17:38,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474722313] [2022-03-20 08:17:38,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:17:38,140 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 08:17:38,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:17:38,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 08:17:38,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-03-20 08:17:38,140 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:38,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:17:38,326 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2022-03-20 08:17:38,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 08:17:38,327 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-20 08:17:38,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:17:38,327 INFO L225 Difference]: With dead ends: 36 [2022-03-20 08:17:38,327 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 08:17:38,328 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-03-20 08:17:38,328 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:17:38,329 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 38 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:17:38,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 08:17:38,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2022-03-20 08:17:38,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:38,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-03-20 08:17:38,333 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 15 [2022-03-20 08:17:38,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:17:38,333 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-03-20 08:17:38,333 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:38,334 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2022-03-20 08:17:38,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 08:17:38,334 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:17:38,334 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:17:38,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 08:17:38,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 08:17:38,543 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:17:38,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:17:38,544 INFO L85 PathProgramCache]: Analyzing trace with hash 265640572, now seen corresponding path program 2 times [2022-03-20 08:17:38,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:17:38,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222204469] [2022-03-20 08:17:38,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:38,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:17:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:38,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:17:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:38,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:17:38,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222204469] [2022-03-20 08:17:38,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222204469] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:17:38,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777375960] [2022-03-20 08:17:38,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:17:38,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:17:38,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:17:38,653 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:17:38,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 08:17:38,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:17:38,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:17:38,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 08:17:38,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:17:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:38,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:17:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:38,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777375960] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:17:38,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:17:38,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-20 08:17:38,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607605046] [2022-03-20 08:17:38,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:17:39,000 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 08:17:39,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:17:39,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 08:17:39,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-03-20 08:17:39,001 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:39,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:17:39,495 INFO L93 Difference]: Finished difference Result 71 states and 101 transitions. [2022-03-20 08:17:39,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 08:17:39,496 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-20 08:17:39,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:17:39,497 INFO L225 Difference]: With dead ends: 71 [2022-03-20 08:17:39,497 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 08:17:39,497 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=523, Unknown=0, NotChecked=0, Total=756 [2022-03-20 08:17:39,498 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:17:39,498 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 48 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:17:39,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 08:17:39,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 36. [2022-03-20 08:17:39,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:39,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2022-03-20 08:17:39,514 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 21 [2022-03-20 08:17:39,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:17:39,514 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2022-03-20 08:17:39,514 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:39,514 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2022-03-20 08:17:39,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 08:17:39,515 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:17:39,515 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:17:39,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-20 08:17:39,736 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:17:39,737 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:17:39,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:17:39,737 INFO L85 PathProgramCache]: Analyzing trace with hash -819090412, now seen corresponding path program 2 times [2022-03-20 08:17:39,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:17:39,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605364536] [2022-03-20 08:17:39,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:39,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:17:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:39,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:17:39,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:39,857 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:39,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:17:39,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605364536] [2022-03-20 08:17:39,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605364536] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:17:39,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256423283] [2022-03-20 08:17:39,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:17:39,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:17:39,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:17:39,859 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:17:39,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 08:17:39,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:17:39,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:17:39,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 08:17:39,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:17:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:39,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:17:40,108 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:40,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256423283] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:17:40,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:17:40,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-20 08:17:40,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216365086] [2022-03-20 08:17:40,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:17:40,109 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 08:17:40,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:17:40,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 08:17:40,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-03-20 08:17:40,110 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:40,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:17:40,817 INFO L93 Difference]: Finished difference Result 149 states and 217 transitions. [2022-03-20 08:17:40,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 08:17:40,817 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-20 08:17:40,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:17:40,819 INFO L225 Difference]: With dead ends: 149 [2022-03-20 08:17:40,819 INFO L226 Difference]: Without dead ends: 144 [2022-03-20 08:17:40,819 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=324, Invalid=732, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 08:17:40,820 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:17:40,820 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 48 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 08:17:40,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-20 08:17:40,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 80. [2022-03-20 08:17:40,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.4666666666666666) internal successors, (110), 75 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:40,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 114 transitions. [2022-03-20 08:17:40,833 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 114 transitions. Word has length 23 [2022-03-20 08:17:40,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:17:40,833 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 114 transitions. [2022-03-20 08:17:40,833 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:40,833 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 114 transitions. [2022-03-20 08:17:40,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 08:17:40,834 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:17:40,834 INFO L499 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:17:40,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 08:17:41,051 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:17:41,051 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:17:41,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:17:41,052 INFO L85 PathProgramCache]: Analyzing trace with hash -382718831, now seen corresponding path program 1 times [2022-03-20 08:17:41,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:17:41,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119391659] [2022-03-20 08:17:41,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:41,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:17:41,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:41,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:17:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:41,084 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-03-20 08:17:41,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:17:41,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119391659] [2022-03-20 08:17:41,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119391659] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:17:41,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:17:41,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 08:17:41,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820100375] [2022-03-20 08:17:41,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:17:41,085 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 08:17:41,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:17:41,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 08:17:41,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 08:17:41,086 INFO L87 Difference]: Start difference. First operand 80 states and 114 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:41,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:17:41,117 INFO L93 Difference]: Finished difference Result 136 states and 195 transitions. [2022-03-20 08:17:41,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 08:17:41,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 29 [2022-03-20 08:17:41,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:17:41,119 INFO L225 Difference]: With dead ends: 136 [2022-03-20 08:17:41,119 INFO L226 Difference]: Without dead ends: 90 [2022-03-20 08:17:41,119 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 08:17:41,120 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:17:41,120 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 22 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:17:41,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-20 08:17:41,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2022-03-20 08:17:41,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.2758620689655173) internal successors, (74), 58 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:41,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2022-03-20 08:17:41,149 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 29 [2022-03-20 08:17:41,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:17:41,149 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2022-03-20 08:17:41,150 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:41,150 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2022-03-20 08:17:41,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 08:17:41,150 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:17:41,150 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:17:41,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-20 08:17:41,151 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:17:41,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:17:41,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1436785103, now seen corresponding path program 2 times [2022-03-20 08:17:41,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:17:41,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352945738] [2022-03-20 08:17:41,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:41,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:17:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:41,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:17:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-03-20 08:17:41,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:17:41,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352945738] [2022-03-20 08:17:41,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352945738] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:17:41,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:17:41,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 08:17:41,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257627011] [2022-03-20 08:17:41,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:17:41,175 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 08:17:41,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:17:41,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 08:17:41,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 08:17:41,176 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:41,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:17:41,206 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2022-03-20 08:17:41,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 08:17:41,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-20 08:17:41,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:17:41,208 INFO L225 Difference]: With dead ends: 88 [2022-03-20 08:17:41,209 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 08:17:41,209 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 08:17:41,210 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:17:41,210 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 24 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:17:41,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 08:17:41,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-03-20 08:17:41,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:41,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2022-03-20 08:17:41,230 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 33 [2022-03-20 08:17:41,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:17:41,231 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2022-03-20 08:17:41,231 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:41,231 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2022-03-20 08:17:41,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 08:17:41,234 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:17:41,234 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:17:41,234 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-20 08:17:41,234 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:17:41,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:17:41,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1063807026, now seen corresponding path program 3 times [2022-03-20 08:17:41,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:17:41,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061188810] [2022-03-20 08:17:41,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:41,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:17:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:41,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:17:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:41,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:17:41,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061188810] [2022-03-20 08:17:41,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061188810] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:17:41,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958405955] [2022-03-20 08:17:41,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 08:17:41,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:17:41,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:17:41,410 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:17:41,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 08:17:41,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-03-20 08:17:41,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:17:41,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 08:17:41,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:17:41,656 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:41,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:17:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 08:17:41,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958405955] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:17:41,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:17:41,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 7] total 22 [2022-03-20 08:17:41,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363670200] [2022-03-20 08:17:41,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:17:41,794 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 08:17:41,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:17:41,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 08:17:41,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-20 08:17:41,795 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:42,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:17:42,345 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-03-20 08:17:42,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 08:17:42,345 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-20 08:17:42,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:17:42,346 INFO L225 Difference]: With dead ends: 77 [2022-03-20 08:17:42,346 INFO L226 Difference]: Without dead ends: 69 [2022-03-20 08:17:42,347 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=1817, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 08:17:42,347 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:17:42,347 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 53 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 08:17:42,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-20 08:17:42,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2022-03-20 08:17:42,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:42,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2022-03-20 08:17:42,355 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 35 [2022-03-20 08:17:42,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:17:42,356 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2022-03-20 08:17:42,356 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:42,356 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2022-03-20 08:17:42,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 08:17:42,356 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:17:42,356 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:17:42,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 08:17:42,561 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:17:42,561 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:17:42,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:17:42,562 INFO L85 PathProgramCache]: Analyzing trace with hash 794106220, now seen corresponding path program 4 times [2022-03-20 08:17:42,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:17:42,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207245188] [2022-03-20 08:17:42,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:42,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:17:42,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:42,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:17:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:42,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:17:42,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207245188] [2022-03-20 08:17:42,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207245188] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:17:42,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675845696] [2022-03-20 08:17:42,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 08:17:42,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:17:42,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:17:42,751 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:17:42,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 08:17:42,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 08:17:42,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:17:42,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 08:17:42,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:17:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:42,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:17:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:43,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675845696] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:17:43,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:17:43,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-03-20 08:17:43,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295408319] [2022-03-20 08:17:43,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:17:43,267 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 08:17:43,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:17:43,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 08:17:43,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2022-03-20 08:17:43,269 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:50,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:17:50,014 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2022-03-20 08:17:50,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 08:17:50,014 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-20 08:17:50,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:17:50,015 INFO L225 Difference]: With dead ends: 103 [2022-03-20 08:17:50,015 INFO L226 Difference]: Without dead ends: 98 [2022-03-20 08:17:50,017 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=985, Invalid=2555, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 08:17:50,017 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 08:17:50,017 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 83 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 08:17:50,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-20 08:17:50,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-03-20 08:17:50,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:50,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2022-03-20 08:17:50,038 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 37 [2022-03-20 08:17:50,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:17:50,038 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2022-03-20 08:17:50,039 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:50,039 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2022-03-20 08:17:50,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 08:17:50,040 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:17:50,040 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:17:50,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 08:17:50,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:17:50,256 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:17:50,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:17:50,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1208240388, now seen corresponding path program 3 times [2022-03-20 08:17:50,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:17:50,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483386858] [2022-03-20 08:17:50,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:50,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:17:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:50,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:17:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:50,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:17:50,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483386858] [2022-03-20 08:17:50,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483386858] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:17:50,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18036129] [2022-03-20 08:17:50,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 08:17:50,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:17:50,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:17:50,498 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:17:50,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 08:17:50,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-03-20 08:17:50,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:17:50,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 08:17:50,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:17:50,768 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:50,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:17:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:51,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18036129] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:17:51,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:17:51,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 20] total 37 [2022-03-20 08:17:51,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351773122] [2022-03-20 08:17:51,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:17:51,483 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 08:17:51,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:17:51,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 08:17:51,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 08:17:51,484 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 37 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:18:23,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:18:23,636 INFO L93 Difference]: Finished difference Result 138 states and 155 transitions. [2022-03-20 08:18:23,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 08:18:23,637 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-03-20 08:18:23,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:18:23,637 INFO L225 Difference]: With dead ends: 138 [2022-03-20 08:18:23,637 INFO L226 Difference]: Without dead ends: 129 [2022-03-20 08:18:23,639 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 31.1s TimeCoverageRelationStatistics Valid=1222, Invalid=3890, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 08:18:23,639 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 149 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 08:18:23,639 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 106 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 08:18:23,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-20 08:18:23,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-03-20 08:18:23,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:18:23,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2022-03-20 08:18:23,651 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 39 [2022-03-20 08:18:23,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:18:23,653 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2022-03-20 08:18:23,654 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:18:23,654 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2022-03-20 08:18:23,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 08:18:23,655 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:18:23,655 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:18:23,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 08:18:23,860 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:18:23,860 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:18:23,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:18:23,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1642006708, now seen corresponding path program 5 times [2022-03-20 08:18:23,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:18:23,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001614700] [2022-03-20 08:18:23,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:18:23,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:18:23,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:18:24,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:18:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:18:24,441 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:18:24,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:18:24,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001614700] [2022-03-20 08:18:24,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001614700] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:18:24,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325239587] [2022-03-20 08:18:24,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 08:18:24,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:18:24,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:18:24,442 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:18:24,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 08:18:34,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2022-03-20 08:18:34,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:18:34,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 08:18:34,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:18:35,246 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:18:35,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:18:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:18:36,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325239587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:18:36,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:18:36,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-03-20 08:18:36,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171042229] [2022-03-20 08:18:36,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:18:36,670 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-20 08:18:36,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:18:36,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-20 08:18:36,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=2947, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 08:18:36,672 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:21:47,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:21:47,144 INFO L93 Difference]: Finished difference Result 199 states and 216 transitions. [2022-03-20 08:21:47,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-20 08:21:47,145 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-03-20 08:21:47,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:21:47,146 INFO L225 Difference]: With dead ends: 199 [2022-03-20 08:21:47,146 INFO L226 Difference]: Without dead ends: 194 [2022-03-20 08:21:47,149 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2075 ImplicationChecksByTransitivity, 190.4s TimeCoverageRelationStatistics Valid=4019, Invalid=11227, Unknown=6, NotChecked=0, Total=15252 [2022-03-20 08:21:47,149 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2507 mSolverCounterSat, 575 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 3082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 575 IncrementalHoareTripleChecker+Valid, 2507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 08:21:47,149 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 163 Invalid, 3082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [575 Valid, 2507 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 08:21:47,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-03-20 08:21:47,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2022-03-20 08:21:47,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0159574468085106) internal successors, (191), 188 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:21:47,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2022-03-20 08:21:47,171 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 69 [2022-03-20 08:21:47,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:21:47,171 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2022-03-20 08:21:47,171 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:21:47,171 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2022-03-20 08:21:47,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 08:21:47,172 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:21:47,172 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:21:47,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-20 08:21:47,378 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 08:21:47,381 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:21:47,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:21:47,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1425056564, now seen corresponding path program 4 times [2022-03-20 08:21:47,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:21:47,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733262694] [2022-03-20 08:21:47,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:21:47,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:21:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:21:47,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:21:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:21:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:21:47,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:21:47,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733262694] [2022-03-20 08:21:47,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733262694] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:21:47,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433632566] [2022-03-20 08:21:47,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 08:21:47,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:21:47,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:21:47,945 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:21:47,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 08:21:48,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 08:21:48,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:21:48,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-20 08:21:48,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:21:48,309 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:21:48,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:21:49,699 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:21:49,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433632566] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:21:49,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:21:49,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-03-20 08:21:49,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544380743] [2022-03-20 08:21:49,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:21:49,700 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-20 08:21:49,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:21:49,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-20 08:21:49,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1075, Invalid=3215, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 08:21:49,702 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:22:46,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:22:46,021 INFO L93 Difference]: Finished difference Result 238 states and 259 transitions. [2022-03-20 08:22:46,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-20 08:22:46,021 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-03-20 08:22:46,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:22:46,022 INFO L225 Difference]: With dead ends: 238 [2022-03-20 08:22:46,022 INFO L226 Difference]: Without dead ends: 233 [2022-03-20 08:22:46,026 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2687 ImplicationChecksByTransitivity, 56.6s TimeCoverageRelationStatistics Valid=4086, Invalid=12170, Unknown=0, NotChecked=0, Total=16256 [2022-03-20 08:22:46,027 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 1903 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 2523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 1903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 08:22:46,027 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 178 Invalid, 2523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 1903 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 08:22:46,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-03-20 08:22:46,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2022-03-20 08:22:46,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.013157894736842) internal successors, (231), 228 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:22:46,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 235 transitions. [2022-03-20 08:22:46,050 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 235 transitions. Word has length 71 [2022-03-20 08:22:46,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:22:46,051 INFO L478 AbstractCegarLoop]: Abstraction has 233 states and 235 transitions. [2022-03-20 08:22:46,051 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:22:46,052 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 235 transitions. [2022-03-20 08:22:46,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-20 08:22:46,052 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:22:46,052 INFO L499 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:22:46,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-20 08:22:46,267 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 08:22:46,268 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:22:46,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:22:46,268 INFO L85 PathProgramCache]: Analyzing trace with hash 843717136, now seen corresponding path program 5 times [2022-03-20 08:22:46,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:22:46,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554506842] [2022-03-20 08:22:46,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:22:46,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:22:46,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 08:22:46,308 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 08:22:46,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 08:22:46,365 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 08:22:46,365 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-03-20 08:22:46,366 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 08:22:46,367 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-20 08:22:46,369 INFO L719 BasicCegarLoop]: Path program histogram: [5, 5, 2, 1, 1] [2022-03-20 08:22:46,372 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 08:22:46,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:22:46 BasicIcfg [2022-03-20 08:22:46,440 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 08:22:46,440 INFO L158 Benchmark]: Toolchain (without parser) took 310138.22ms. Allocated memory was 208.7MB in the beginning and 351.3MB in the end (delta: 142.6MB). Free memory was 183.8MB in the beginning and 326.2MB in the end (delta: -142.4MB). Peak memory consumption was 207.0MB. Max. memory is 8.0GB. [2022-03-20 08:22:46,440 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 208.7MB. Free memory was 170.4MB in the beginning and 170.3MB in the end (delta: 115.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 08:22:46,440 INFO L158 Benchmark]: CACSL2BoogieTranslator took 201.86ms. Allocated memory was 208.7MB in the beginning and 292.6MB in the end (delta: 83.9MB). Free memory was 183.8MB in the beginning and 267.0MB in the end (delta: -83.2MB). Peak memory consumption was 10.1MB. Max. memory is 8.0GB. [2022-03-20 08:22:46,441 INFO L158 Benchmark]: Boogie Preprocessor took 28.62ms. Allocated memory is still 292.6MB. Free memory was 267.0MB in the beginning and 265.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 08:22:46,441 INFO L158 Benchmark]: RCFGBuilder took 246.94ms. Allocated memory is still 292.6MB. Free memory was 265.6MB in the beginning and 255.4MB in the end (delta: 10.1MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-20 08:22:46,441 INFO L158 Benchmark]: IcfgTransformer took 13.73ms. Allocated memory is still 292.6MB. Free memory was 255.4MB in the beginning and 254.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 08:22:46,442 INFO L158 Benchmark]: TraceAbstraction took 309627.59ms. Allocated memory was 292.6MB in the beginning and 351.3MB in the end (delta: 58.7MB). Free memory was 253.8MB in the beginning and 326.2MB in the end (delta: -72.4MB). Peak memory consumption was 193.8MB. Max. memory is 8.0GB. [2022-03-20 08:22:46,443 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 208.7MB. Free memory was 170.4MB in the beginning and 170.3MB in the end (delta: 115.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 201.86ms. Allocated memory was 208.7MB in the beginning and 292.6MB in the end (delta: 83.9MB). Free memory was 183.8MB in the beginning and 267.0MB in the end (delta: -83.2MB). Peak memory consumption was 10.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.62ms. Allocated memory is still 292.6MB. Free memory was 267.0MB in the beginning and 265.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 246.94ms. Allocated memory is still 292.6MB. Free memory was 265.6MB in the beginning and 255.4MB in the end (delta: 10.1MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 13.73ms. Allocated memory is still 292.6MB. Free memory was 255.4MB in the beginning and 254.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 309627.59ms. Allocated memory was 292.6MB in the beginning and 351.3MB in the end (delta: 58.7MB). Free memory was 253.8MB in the beginning and 326.2MB in the end (delta: -72.4MB). Peak memory consumption was 193.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int x = 0; [L15] unsigned int y = __VERIFIER_nondet_uint(); [L17] COND TRUE x < 99 VAL [x=0, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=2, y=4294967295] [L17] COND TRUE x < 99 VAL [x=2, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=4, y=4294967295] [L17] COND TRUE x < 99 VAL [x=4, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=6, y=4294967295] [L17] COND TRUE x < 99 VAL [x=6, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=8, y=4294967295] [L17] COND TRUE x < 99 VAL [x=8, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=10, y=4294967295] [L17] COND TRUE x < 99 VAL [x=10, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=12, y=4294967295] [L17] COND TRUE x < 99 VAL [x=12, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=14, y=4294967295] [L17] COND TRUE x < 99 VAL [x=14, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=16, y=4294967295] [L17] COND TRUE x < 99 VAL [x=16, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=18, y=4294967295] [L17] COND TRUE x < 99 VAL [x=18, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=20, y=4294967295] [L17] COND TRUE x < 99 VAL [x=20, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=22, y=4294967295] [L17] COND TRUE x < 99 VAL [x=22, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=24, y=4294967295] [L17] COND TRUE x < 99 VAL [x=24, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=26, y=4294967295] [L17] COND TRUE x < 99 VAL [x=26, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=28, y=4294967295] [L17] COND TRUE x < 99 VAL [x=28, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=30, y=4294967295] [L17] COND TRUE x < 99 VAL [x=30, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=32, y=4294967295] [L17] COND TRUE x < 99 VAL [x=32, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=34, y=4294967295] [L17] COND TRUE x < 99 VAL [x=34, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=36, y=4294967295] [L17] COND TRUE x < 99 VAL [x=36, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=38, y=4294967295] [L17] COND TRUE x < 99 VAL [x=38, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=40, y=4294967295] [L17] COND TRUE x < 99 VAL [x=40, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=42, y=4294967295] [L17] COND TRUE x < 99 VAL [x=42, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=44, y=4294967295] [L17] COND TRUE x < 99 VAL [x=44, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=46, y=4294967295] [L17] COND TRUE x < 99 VAL [x=46, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=48, y=4294967295] [L17] COND TRUE x < 99 VAL [x=48, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=50, y=4294967295] [L17] COND TRUE x < 99 VAL [x=50, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=52, y=4294967295] [L17] COND TRUE x < 99 VAL [x=52, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=54, y=4294967295] [L17] COND TRUE x < 99 VAL [x=54, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=56, y=4294967295] [L17] COND TRUE x < 99 VAL [x=56, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=58, y=4294967295] [L17] COND TRUE x < 99 VAL [x=58, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=60, y=4294967295] [L17] COND TRUE x < 99 VAL [x=60, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=62, y=4294967295] [L17] COND TRUE x < 99 VAL [x=62, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=64, y=4294967295] [L17] COND TRUE x < 99 VAL [x=64, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=66, y=4294967295] [L17] COND TRUE x < 99 VAL [x=66, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=68, y=4294967295] [L17] COND TRUE x < 99 VAL [x=68, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=70, y=4294967295] [L17] COND TRUE x < 99 VAL [x=70, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=72, y=4294967295] [L17] COND TRUE x < 99 VAL [x=72, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=74, y=4294967295] [L17] COND TRUE x < 99 VAL [x=74, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=76, y=4294967295] [L17] COND TRUE x < 99 VAL [x=76, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=78, y=4294967295] [L17] COND TRUE x < 99 VAL [x=78, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=80, y=4294967295] [L17] COND TRUE x < 99 VAL [x=80, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=82, y=4294967295] [L17] COND TRUE x < 99 VAL [x=82, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=84, y=4294967295] [L17] COND TRUE x < 99 VAL [x=84, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=86, y=4294967295] [L17] COND TRUE x < 99 VAL [x=86, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=88, y=4294967295] [L17] COND TRUE x < 99 VAL [x=88, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=90, y=4294967295] [L17] COND TRUE x < 99 VAL [x=90, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=92, y=4294967295] [L17] COND TRUE x < 99 VAL [x=92, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=94, y=4294967295] [L17] COND TRUE x < 99 VAL [x=94, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=96, y=4294967295] [L17] COND TRUE x < 99 VAL [x=96, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=98, y=4294967295] [L17] COND TRUE x < 99 VAL [x=98, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=100, y=4294967295] [L17] COND FALSE !(x < 99) VAL [x=100, y=4294967295] [L25] CALL __VERIFIER_assert((x % 2) == (y % 2)) VAL [\old(cond)=0] [L7] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L8] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 309.5s, OverallIterations: 14, TraceHistogramMax: 50, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 287.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 549 SdHoareTripleChecker+Valid, 5.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 548 mSDsluCounter, 826 SdHoareTripleChecker+Invalid, 5.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 667 mSDsCounter, 1799 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6829 IncrementalHoareTripleChecker+Invalid, 8628 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1799 mSolverCounterUnsat, 159 mSDtfsCounter, 6829 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1075 GetRequests, 554 SyntacticMatches, 9 SemanticMatches, 512 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6647 ImplicationChecksByTransitivity, 286.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=233occurred in iteration=13, InterpolantAutomatonStates: 289, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 136 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 10.9s SatisfiabilityAnalysisTime, 8.0s InterpolantComputationTime, 841 NumberOfCodeBlocks, 841 NumberOfCodeBlocksAsserted, 82 NumberOfCheckSat, 1022 ConstructedInterpolants, 0 QuantifiedInterpolants, 5490 SizeOfPredicates, 10 NumberOfNonLiveVariables, 985 ConjunctsInSsa, 258 ConjunctsInUnsatCore, 31 InterpolantComputations, 4 PerfectInterpolantSequences, 262/7150 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-20 08:22:46,470 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...