/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 07:23:46,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 07:23:46,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 07:23:46,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 07:23:46,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 07:23:46,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 07:23:46,799 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 07:23:46,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 07:23:46,802 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 07:23:46,805 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 07:23:46,806 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 07:23:46,807 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 07:23:46,807 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 07:23:46,809 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 07:23:46,810 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 07:23:46,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 07:23:46,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 07:23:46,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 07:23:46,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 07:23:46,818 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 07:23:46,819 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 07:23:46,820 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 07:23:46,821 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 07:23:46,822 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 07:23:46,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 07:23:46,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 07:23:46,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 07:23:46,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 07:23:46,834 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 07:23:46,844 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 07:23:46,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 07:23:46,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 07:23:46,846 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 07:23:46,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 07:23:46,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 07:23:46,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 07:23:46,846 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 07:23:46,846 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 07:23:46,846 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 07:23:46,847 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 07:23:46,847 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 07:23:46,847 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 07:23:46,847 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 07:23:46,847 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 07:23:46,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 07:23:46,848 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 07:23:46,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 07:23:46,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:23:46,848 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 07:23:46,848 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 07:23:46,849 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 07:23:46,849 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 07:23:47,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 07:23:47,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 07:23:47,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 07:23:47,161 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 07:23:47,161 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 07:23:47,162 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2022-01-31 07:23:47,238 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a31eb9d9b/1266a11ad8b44f5e931fc6cdc9d85c36/FLAGfa23b5c5d [2022-01-31 07:23:47,644 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 07:23:47,645 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2022-01-31 07:23:47,649 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a31eb9d9b/1266a11ad8b44f5e931fc6cdc9d85c36/FLAGfa23b5c5d [2022-01-31 07:23:47,661 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a31eb9d9b/1266a11ad8b44f5e931fc6cdc9d85c36 [2022-01-31 07:23:47,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 07:23:47,663 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 07:23:47,667 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 07:23:47,667 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 07:23:47,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 07:23:47,669 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:23:47" (1/1) ... [2022-01-31 07:23:47,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a63f749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:47, skipping insertion in model container [2022-01-31 07:23:47,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:23:47" (1/1) ... [2022-01-31 07:23:47,674 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 07:23:47,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 07:23:47,997 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i[817,830] [2022-01-31 07:23:48,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:23:48,017 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 07:23:48,027 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i[817,830] [2022-01-31 07:23:48,041 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:23:48,053 INFO L208 MainTranslator]: Completed translation [2022-01-31 07:23:48,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:48 WrapperNode [2022-01-31 07:23:48,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 07:23:48,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 07:23:48,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 07:23:48,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 07:23:48,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:48" (1/1) ... [2022-01-31 07:23:48,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:48" (1/1) ... [2022-01-31 07:23:48,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:48" (1/1) ... [2022-01-31 07:23:48,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:48" (1/1) ... [2022-01-31 07:23:48,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:48" (1/1) ... [2022-01-31 07:23:48,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:48" (1/1) ... [2022-01-31 07:23:48,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:48" (1/1) ... [2022-01-31 07:23:48,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 07:23:48,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 07:23:48,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 07:23:48,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 07:23:48,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:48" (1/1) ... [2022-01-31 07:23:48,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:23:48,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:48,141 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) [2022-01-31 07:23:48,208 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 [2022-01-31 07:23:48,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 07:23:48,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 07:23:48,241 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 07:23:48,241 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 07:23:48,242 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 07:23:48,242 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 07:23:48,242 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 07:23:48,242 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 07:23:48,242 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 07:23:48,243 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 07:23:48,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 07:23:48,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 07:23:48,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 07:23:48,243 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 07:23:48,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 07:23:48,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 07:23:48,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 07:23:48,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 07:23:48,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 07:23:48,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 07:23:48,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 07:23:48,309 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 07:23:48,311 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 07:23:48,457 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 07:23:48,460 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 07:23:48,460 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-31 07:23:48,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:23:48 BoogieIcfgContainer [2022-01-31 07:23:48,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 07:23:48,462 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 07:23:48,462 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 07:23:48,463 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 07:23:48,465 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:23:48" (1/1) ... [2022-01-31 07:23:48,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:23:48 BasicIcfg [2022-01-31 07:23:48,501 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 07:23:48,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 07:23:48,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 07:23:48,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 07:23:48,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:23:47" (1/4) ... [2022-01-31 07:23:48,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68c930bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:23:48, skipping insertion in model container [2022-01-31 07:23:48,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:48" (2/4) ... [2022-01-31 07:23:48,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68c930bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:23:48, skipping insertion in model container [2022-01-31 07:23:48,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:23:48" (3/4) ... [2022-01-31 07:23:48,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68c930bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 07:23:48, skipping insertion in model container [2022-01-31 07:23:48,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:23:48" (4/4) ... [2022-01-31 07:23:48,506 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.iJordan [2022-01-31 07:23:48,509 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 07:23:48,509 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 07:23:48,610 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 07:23:48,617 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 07:23:48,617 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 07:23:48,631 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 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) [2022-01-31 07:23:48,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 07:23:48,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:48,644 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:48,645 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:48,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:48,693 INFO L85 PathProgramCache]: Analyzing trace with hash -988722501, now seen corresponding path program 1 times [2022-01-31 07:23:48,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:48,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759393844] [2022-01-31 07:23:48,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:48,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:48,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:23:48,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:48,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759393844] [2022-01-31 07:23:48,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759393844] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:48,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:48,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 07:23:48,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665553828] [2022-01-31 07:23:48,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:48,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:23:48,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:48,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:23:48,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 07:23:48,936 INFO L87 Difference]: Start difference. First operand has 32 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:48,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:48,968 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2022-01-31 07:23:48,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:23:48,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 07:23:48,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:48,976 INFO L225 Difference]: With dead ends: 32 [2022-01-31 07:23:48,976 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 07:23:48,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 07:23:48,983 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 29 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 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 [2022-01-31 07:23:48,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:23:48,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 07:23:49,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-31 07:23:49,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:23:49,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-01-31 07:23:49,008 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2022-01-31 07:23:49,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:49,009 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-01-31 07:23:49,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:49,009 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-01-31 07:23:49,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 07:23:49,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:49,010 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:49,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 07:23:49,012 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:49,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:49,013 INFO L85 PathProgramCache]: Analyzing trace with hash 557574329, now seen corresponding path program 1 times [2022-01-31 07:23:49,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:49,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606629458] [2022-01-31 07:23:49,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:49,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:49,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:49,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:23:49,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:49,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606629458] [2022-01-31 07:23:49,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606629458] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:49,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:49,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 07:23:49,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945121408] [2022-01-31 07:23:49,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:49,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 07:23:49,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:49,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 07:23:49,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 07:23:49,065 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:49,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:49,104 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2022-01-31 07:23:49,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 07:23:49,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 07:23:49,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:49,105 INFO L225 Difference]: With dead ends: 29 [2022-01-31 07:23:49,105 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 07:23:49,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 07:23:49,107 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 27 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:49,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 36 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:23:49,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 07:23:49,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-01-31 07:23:49,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:23:49,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-01-31 07:23:49,124 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 16 [2022-01-31 07:23:49,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:49,124 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-01-31 07:23:49,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:49,125 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-01-31 07:23:49,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 07:23:49,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:49,125 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:49,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 07:23:49,126 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:49,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:49,126 INFO L85 PathProgramCache]: Analyzing trace with hash 353901147, now seen corresponding path program 1 times [2022-01-31 07:23:49,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:49,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927284635] [2022-01-31 07:23:49,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:49,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:49,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:49,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:49,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:23:49,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:49,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927284635] [2022-01-31 07:23:49,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927284635] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:49,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633379550] [2022-01-31 07:23:49,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:49,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:49,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:49,188 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) [2022-01-31 07:23:49,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 07:23:49,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:49,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 07:23:49,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:49,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 07:23:49,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633379550] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:49,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 07:23:49,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-01-31 07:23:49,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049938528] [2022-01-31 07:23:49,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:49,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 07:23:49,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:49,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 07:23:49,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 07:23:49,323 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:49,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:49,378 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-01-31 07:23:49,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 07:23:49,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-31 07:23:49,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:49,381 INFO L225 Difference]: With dead ends: 35 [2022-01-31 07:23:49,381 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 07:23:49,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-31 07:23:49,383 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:49,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 71 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:23:49,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 07:23:49,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-01-31 07:23:49,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:23:49,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-01-31 07:23:49,387 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 18 [2022-01-31 07:23:49,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:49,388 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-01-31 07:23:49,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:49,388 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-01-31 07:23:49,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 07:23:49,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:49,389 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:49,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:49,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:49,614 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:49,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:49,615 INFO L85 PathProgramCache]: Analyzing trace with hash 222929919, now seen corresponding path program 1 times [2022-01-31 07:23:49,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:49,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120851627] [2022-01-31 07:23:49,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:49,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:49,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:49,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:49,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120851627] [2022-01-31 07:23:49,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120851627] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:49,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647959960] [2022-01-31 07:23:49,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:49,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:49,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:49,667 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) [2022-01-31 07:23:49,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 07:23:49,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:49,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 07:23:49,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:49,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:49,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:49,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647959960] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:49,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:49,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 07:23:49,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498678323] [2022-01-31 07:23:49,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:49,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 07:23:49,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:49,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 07:23:49,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 07:23:49,784 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 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) [2022-01-31 07:23:49,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:49,931 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2022-01-31 07:23:49,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 07:23:49,932 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 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 [2022-01-31 07:23:49,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:49,936 INFO L225 Difference]: With dead ends: 59 [2022-01-31 07:23:49,936 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 07:23:49,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 07:23:49,941 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:49,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 37 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:49,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 07:23:49,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 35. [2022-01-31 07:23:49,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:23:49,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-01-31 07:23:49,965 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 21 [2022-01-31 07:23:49,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:49,965 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-01-31 07:23:49,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 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) [2022-01-31 07:23:49,966 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-01-31 07:23:49,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 07:23:49,966 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:49,966 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:49,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:50,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 07:23:50,185 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:50,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:50,186 INFO L85 PathProgramCache]: Analyzing trace with hash 810729561, now seen corresponding path program 2 times [2022-01-31 07:23:50,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:50,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171154621] [2022-01-31 07:23:50,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:50,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:50,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:50,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:23:50,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:50,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171154621] [2022-01-31 07:23:50,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171154621] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:50,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:50,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 07:23:50,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220842995] [2022-01-31 07:23:50,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:50,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 07:23:50,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:50,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 07:23:50,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 07:23:50,265 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2022-01-31 07:23:50,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:50,368 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-01-31 07:23:50,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 07:23:50,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 27 [2022-01-31 07:23:50,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:50,369 INFO L225 Difference]: With dead ends: 40 [2022-01-31 07:23:50,369 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 07:23:50,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 07:23:50,370 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 35 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:50,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 39 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:50,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 07:23:50,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2022-01-31 07:23:50,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:23:50,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-01-31 07:23:50,373 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 27 [2022-01-31 07:23:50,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:50,374 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-01-31 07:23:50,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2022-01-31 07:23:50,390 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-01-31 07:23:50,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 07:23:50,391 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:50,391 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:50,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 07:23:50,392 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:50,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:50,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1800871950, now seen corresponding path program 1 times [2022-01-31 07:23:50,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:50,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916647637] [2022-01-31 07:23:50,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:50,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:50,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:23:50,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:50,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916647637] [2022-01-31 07:23:50,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916647637] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:50,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416371960] [2022-01-31 07:23:50,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:50,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:50,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:50,546 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) [2022-01-31 07:23:50,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 07:23:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:50,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 07:23:50,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 07:23:50,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 07:23:50,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416371960] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:50,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:50,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-01-31 07:23:50,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602179098] [2022-01-31 07:23:50,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:50,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 07:23:50,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:50,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 07:23:50,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2022-01-31 07:23:50,865 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 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) [2022-01-31 07:23:51,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:51,200 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2022-01-31 07:23:51,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 07:23:51,200 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 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 30 [2022-01-31 07:23:51,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:51,201 INFO L225 Difference]: With dead ends: 88 [2022-01-31 07:23:51,201 INFO L226 Difference]: Without dead ends: 88 [2022-01-31 07:23:51,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=303, Invalid=567, Unknown=0, NotChecked=0, Total=870 [2022-01-31 07:23:51,203 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 245 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:51,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 45 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 07:23:51,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-31 07:23:51,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-01-31 07:23:51,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 82 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:23:51,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2022-01-31 07:23:51,209 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 30 [2022-01-31 07:23:51,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:51,209 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2022-01-31 07:23:51,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 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) [2022-01-31 07:23:51,210 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2022-01-31 07:23:51,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 07:23:51,211 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:51,212 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:51,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:51,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:51,433 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:51,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:51,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1270240706, now seen corresponding path program 2 times [2022-01-31 07:23:51,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:51,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415265797] [2022-01-31 07:23:51,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:51,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:51,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:51,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:51,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-01-31 07:23:51,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:51,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415265797] [2022-01-31 07:23:51,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415265797] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:51,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408634565] [2022-01-31 07:23:51,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:23:51,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:51,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:51,629 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) [2022-01-31 07:23:51,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 07:23:51,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:23:51,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:23:51,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 07:23:51,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:51,800 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-01-31 07:23:51,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-01-31 07:23:52,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408634565] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:52,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:52,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-31 07:23:52,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462461729] [2022-01-31 07:23:52,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:52,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 07:23:52,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:52,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 07:23:52,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 07:23:52,071 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-01-31 07:23:52,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:52,789 INFO L93 Difference]: Finished difference Result 256 states and 337 transitions. [2022-01-31 07:23:52,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 07:23:52,790 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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 66 [2022-01-31 07:23:52,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:52,791 INFO L225 Difference]: With dead ends: 256 [2022-01-31 07:23:52,791 INFO L226 Difference]: Without dead ends: 256 [2022-01-31 07:23:52,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 07:23:52,792 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 820 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:52,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 42 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 07:23:52,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-01-31 07:23:52,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 112. [2022-01-31 07:23:52,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.2075471698113207) internal successors, (128), 106 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:23:52,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2022-01-31 07:23:52,807 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 66 [2022-01-31 07:23:52,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:52,808 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2022-01-31 07:23:52,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-01-31 07:23:52,808 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2022-01-31 07:23:52,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 07:23:52,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:52,809 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:52,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:53,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:53,010 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:53,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:53,011 INFO L85 PathProgramCache]: Analyzing trace with hash 505202390, now seen corresponding path program 3 times [2022-01-31 07:23:53,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:53,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140870251] [2022-01-31 07:23:53,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:53,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:53,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:53,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:53,378 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-01-31 07:23:53,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:53,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140870251] [2022-01-31 07:23:53,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140870251] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:53,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160240492] [2022-01-31 07:23:53,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 07:23:53,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:53,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:53,402 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) [2022-01-31 07:23:53,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 07:23:53,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 07:23:53,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:23:53,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-31 07:23:53,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 584 trivial. 0 not checked. [2022-01-31 07:23:53,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 07:23:53,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160240492] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:53,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 07:23:53,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [26] total 30 [2022-01-31 07:23:53,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739446480] [2022-01-31 07:23:53,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:53,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 07:23:53,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:53,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 07:23:53,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=554, Unknown=0, NotChecked=0, Total=870 [2022-01-31 07:23:53,708 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:53,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:53,783 INFO L93 Difference]: Finished difference Result 193 states and 253 transitions. [2022-01-31 07:23:53,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 07:23:53,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-01-31 07:23:53,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:53,788 INFO L225 Difference]: With dead ends: 193 [2022-01-31 07:23:53,789 INFO L226 Difference]: Without dead ends: 192 [2022-01-31 07:23:53,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2022-01-31 07:23:53,790 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:53,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 86 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:23:53,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-01-31 07:23:53,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 113. [2022-01-31 07:23:53,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 107 states have (on average 1.2149532710280373) internal successors, (130), 107 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:23:53,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 135 transitions. [2022-01-31 07:23:53,796 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 135 transitions. Word has length 90 [2022-01-31 07:23:53,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:53,797 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 135 transitions. [2022-01-31 07:23:53,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:53,797 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 135 transitions. [2022-01-31 07:23:53,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 07:23:53,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:53,798 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:53,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:54,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:54,019 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:54,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:54,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1569844309, now seen corresponding path program 4 times [2022-01-31 07:23:54,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:54,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193928401] [2022-01-31 07:23:54,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:54,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:54,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:54,326 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-01-31 07:23:54,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:54,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193928401] [2022-01-31 07:23:54,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193928401] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:54,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640049491] [2022-01-31 07:23:54,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 07:23:54,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:54,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:54,336 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) [2022-01-31 07:23:54,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 07:23:54,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 07:23:54,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:23:54,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 07:23:54,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-01-31 07:23:54,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-01-31 07:23:55,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640049491] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:55,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:55,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-01-31 07:23:55,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744250067] [2022-01-31 07:23:55,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:55,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 07:23:55,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:55,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 07:23:55,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 07:23:55,275 INFO L87 Difference]: Start difference. First operand 113 states and 135 transitions. Second operand has 50 states, 50 states have (on average 2.24) internal successors, (112), 49 states have internal predecessors, (112), 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) [2022-01-31 07:23:57,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:57,117 INFO L93 Difference]: Finished difference Result 703 states and 941 transitions. [2022-01-31 07:23:57,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 07:23:57,118 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.24) internal successors, (112), 49 states have internal predecessors, (112), 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 93 [2022-01-31 07:23:57,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:57,122 INFO L225 Difference]: With dead ends: 703 [2022-01-31 07:23:57,122 INFO L226 Difference]: Without dead ends: 703 [2022-01-31 07:23:57,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 07:23:57,126 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 2517 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2518 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:57,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2518 Valid, 42 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 07:23:57,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-01-31 07:23:57,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 161. [2022-01-31 07:23:57,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 155 states have (on average 1.1483870967741936) internal successors, (178), 155 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:23:57,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 183 transitions. [2022-01-31 07:23:57,153 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 183 transitions. Word has length 93 [2022-01-31 07:23:57,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:57,153 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 183 transitions. [2022-01-31 07:23:57,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.24) internal successors, (112), 49 states have internal predecessors, (112), 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) [2022-01-31 07:23:57,154 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 183 transitions. [2022-01-31 07:23:57,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 07:23:57,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:57,160 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:57,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:57,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:57,384 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:57,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:57,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1570028837, now seen corresponding path program 5 times [2022-01-31 07:23:57,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:57,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613991099] [2022-01-31 07:23:57,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:57,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:58,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:58,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-01-31 07:23:58,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:58,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613991099] [2022-01-31 07:23:58,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613991099] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:58,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709075079] [2022-01-31 07:23:58,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 07:23:58,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:58,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:58,386 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) [2022-01-31 07:23:58,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 07:24:27,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2022-01-31 07:24:27,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:24:27,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 07:24:27,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:24:28,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 86 proven. 7 refuted. 0 times theorem prover too weak. 2161 trivial. 0 not checked. [2022-01-31 07:24:28,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:24:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 89 proven. 4 refuted. 0 times theorem prover too weak. 2161 trivial. 0 not checked. [2022-01-31 07:24:28,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709075079] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:24:28,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:24:28,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 8, 8] total 61 [2022-01-31 07:24:28,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086062478] [2022-01-31 07:24:28,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:24:28,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 07:24:28,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:24:28,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 07:24:28,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1234, Invalid=2426, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 07:24:28,476 INFO L87 Difference]: Start difference. First operand 161 states and 183 transitions. Second operand has 61 states, 61 states have (on average 2.360655737704918) internal successors, (144), 60 states have internal predecessors, (144), 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) [2022-01-31 07:24:36,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:24:36,199 INFO L93 Difference]: Finished difference Result 789 states and 1041 transitions. [2022-01-31 07:24:36,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2022-01-31 07:24:36,200 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.360655737704918) internal successors, (144), 60 states have internal predecessors, (144), 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 141 [2022-01-31 07:24:36,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:24:36,203 INFO L225 Difference]: With dead ends: 789 [2022-01-31 07:24:36,203 INFO L226 Difference]: Without dead ends: 789 [2022-01-31 07:24:36,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19463 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=17500, Invalid=43262, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 07:24:36,215 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 4267 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 1691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4267 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 3054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1691 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 07:24:36,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4267 Valid, 100 Invalid, 3054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1691 Valid, 1363 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 07:24:36,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-01-31 07:24:36,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 188. [2022-01-31 07:24:36,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 182 states have (on average 1.1538461538461537) internal successors, (210), 182 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:24:36,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 215 transitions. [2022-01-31 07:24:36,226 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 215 transitions. Word has length 141 [2022-01-31 07:24:36,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:24:36,226 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 215 transitions. [2022-01-31 07:24:36,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.360655737704918) internal successors, (144), 60 states have internal predecessors, (144), 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) [2022-01-31 07:24:36,226 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 215 transitions. [2022-01-31 07:24:36,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-31 07:24:36,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:24:36,228 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 15, 15, 15, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:24:36,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 07:24:36,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:36,448 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:24:36,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:24:36,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1810289526, now seen corresponding path program 6 times [2022-01-31 07:24:36,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:24:36,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919190021] [2022-01-31 07:24:36,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:24:36,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:24:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:37,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:24:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:37,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2776 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2022-01-31 07:24:37,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:24:37,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919190021] [2022-01-31 07:24:37,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919190021] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:24:37,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810457846] [2022-01-31 07:24:37,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 07:24:37,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:37,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:24:37,503 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) [2022-01-31 07:24:37,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 07:24:37,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-31 07:24:37,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:24:37,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 07:24:37,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:24:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2776 backedges. 132 proven. 5 refuted. 0 times theorem prover too weak. 2639 trivial. 0 not checked. [2022-01-31 07:24:38,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:24:38,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2776 backedges. 132 proven. 5 refuted. 0 times theorem prover too weak. 2639 trivial. 0 not checked. [2022-01-31 07:24:38,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810457846] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:24:38,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:24:38,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 8, 8] total 62 [2022-01-31 07:24:38,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396396844] [2022-01-31 07:24:38,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:24:38,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 07:24:38,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:24:38,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 07:24:38,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1521, Invalid=2261, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 07:24:38,379 INFO L87 Difference]: Start difference. First operand 188 states and 215 transitions. Second operand has 62 states, 62 states have (on average 2.338709677419355) internal successors, (145), 61 states have internal predecessors, (145), 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) [2022-01-31 07:24:49,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:24:49,390 INFO L93 Difference]: Finished difference Result 1289 states and 1762 transitions. [2022-01-31 07:24:49,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 350 states. [2022-01-31 07:24:49,391 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.338709677419355) internal successors, (145), 61 states have internal predecessors, (145), 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 182 [2022-01-31 07:24:49,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:24:49,398 INFO L225 Difference]: With dead ends: 1289 [2022-01-31 07:24:49,399 INFO L226 Difference]: Without dead ends: 1240 [2022-01-31 07:24:49,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 961 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 407 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66390 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=38508, Invalid=128364, Unknown=0, NotChecked=0, Total=166872 [2022-01-31 07:24:49,414 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 4323 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 1620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4324 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 2365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1620 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 07:24:49,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4324 Valid, 74 Invalid, 2365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1620 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 07:24:49,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2022-01-31 07:24:49,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 714. [2022-01-31 07:24:49,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 708 states have (on average 1.3559322033898304) internal successors, (960), 708 states have internal predecessors, (960), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:24:49,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 965 transitions. [2022-01-31 07:24:49,434 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 965 transitions. Word has length 182 [2022-01-31 07:24:49,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:24:49,435 INFO L470 AbstractCegarLoop]: Abstraction has 714 states and 965 transitions. [2022-01-31 07:24:49,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.338709677419355) internal successors, (145), 61 states have internal predecessors, (145), 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) [2022-01-31 07:24:49,435 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 965 transitions. [2022-01-31 07:24:49,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 690 [2022-01-31 07:24:49,447 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:24:49,447 INFO L514 BasicCegarLoop]: trace histogram [143, 143, 143, 50, 50, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:24:49,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 07:24:49,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 07:24:49,660 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:24:49,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:24:49,660 INFO L85 PathProgramCache]: Analyzing trace with hash 760111838, now seen corresponding path program 7 times [2022-01-31 07:24:49,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:24:49,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406918354] [2022-01-31 07:24:49,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:24:49,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:24:49,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:50,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:24:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:50,872 INFO L134 CoverageAnalysis]: Checked inductivity of 43255 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2022-01-31 07:24:50,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:24:50,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406918354] [2022-01-31 07:24:50,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406918354] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:24:50,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249169647] [2022-01-31 07:24:50,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 07:24:50,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:50,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:24:50,878 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) [2022-01-31 07:24:50,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 07:24:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:51,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 2581 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-31 07:24:51,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:24:52,041 INFO L134 CoverageAnalysis]: Checked inductivity of 43255 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2022-01-31 07:24:52,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:24:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 43255 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2022-01-31 07:24:54,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249169647] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:24:54,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:24:54,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 106 [2022-01-31 07:24:54,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133945246] [2022-01-31 07:24:54,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:24:54,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 07:24:54,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:24:54,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 07:24:54,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 07:24:54,985 INFO L87 Difference]: Start difference. First operand 714 states and 965 transitions. Second operand has 106 states, 106 states have (on average 2.1132075471698113) internal successors, (224), 105 states have internal predecessors, (224), 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) [2022-01-31 07:25:02,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:25:02,234 INFO L93 Difference]: Finished difference Result 44221 states and 62630 transitions. [2022-01-31 07:25:02,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 07:25:02,235 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.1132075471698113) internal successors, (224), 105 states have internal predecessors, (224), 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 689 [2022-01-31 07:25:02,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:25:02,333 INFO L225 Difference]: With dead ends: 44221 [2022-01-31 07:25:02,333 INFO L226 Difference]: Without dead ends: 44221 [2022-01-31 07:25:02,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1534 GetRequests, 1328 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6726 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=16173, Invalid=26883, Unknown=0, NotChecked=0, Total=43056 [2022-01-31 07:25:02,336 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 4868 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1793 mSolverCounterSat, 958 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4869 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 2751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 958 IncrementalHoareTripleChecker+Valid, 1793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 07:25:02,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4869 Valid, 57 Invalid, 2751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [958 Valid, 1793 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 07:25:02,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44221 states. [2022-01-31 07:25:02,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44221 to 818. [2022-01-31 07:25:02,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 812 states have (on average 1.3103448275862069) internal successors, (1064), 812 states have internal predecessors, (1064), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:25:02,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1069 transitions. [2022-01-31 07:25:02,561 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1069 transitions. Word has length 689 [2022-01-31 07:25:02,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:25:02,561 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 1069 transitions. [2022-01-31 07:25:02,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.1132075471698113) internal successors, (224), 105 states have internal predecessors, (224), 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) [2022-01-31 07:25:02,561 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1069 transitions. [2022-01-31 07:25:02,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 794 [2022-01-31 07:25:02,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:25:02,573 INFO L514 BasicCegarLoop]: trace histogram [143, 143, 143, 102, 102, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:25:02,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 07:25:02,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:25:02,808 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:25:02,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:25:02,808 INFO L85 PathProgramCache]: Analyzing trace with hash -235896330, now seen corresponding path program 8 times [2022-01-31 07:25:02,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:25:02,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680198378] [2022-01-31 07:25:02,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:25:02,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:25:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:05,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:25:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 51159 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2022-01-31 07:25:05,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:25:05,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680198378] [2022-01-31 07:25:05,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680198378] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:25:05,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118519165] [2022-01-31 07:25:05,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:25:05,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:25:05,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:25:05,867 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:25:05,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 07:25:06,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:25:06,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:25:06,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 3049 conjuncts, 104 conjunts are in the unsatisfiable core [2022-01-31 07:25:06,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:25:07,167 INFO L134 CoverageAnalysis]: Checked inductivity of 51159 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2022-01-31 07:25:07,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:25:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 51159 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2022-01-31 07:25:16,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118519165] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:25:16,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:25:16,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 105, 105] total 210 [2022-01-31 07:25:16,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573519057] [2022-01-31 07:25:16,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:25:16,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 210 states [2022-01-31 07:25:16,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:25:16,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 210 interpolants. [2022-01-31 07:25:16,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21738, Invalid=22152, Unknown=0, NotChecked=0, Total=43890 [2022-01-31 07:25:16,231 INFO L87 Difference]: Start difference. First operand 818 states and 1069 transitions. Second operand has 210 states, 210 states have (on average 2.057142857142857) internal successors, (432), 209 states have internal predecessors, (432), 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) [2022-01-31 07:26:10,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:26:10,993 INFO L93 Difference]: Finished difference Result 105061 states and 148950 transitions. [2022-01-31 07:26:10,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 209 states. [2022-01-31 07:26:10,994 INFO L78 Accepts]: Start accepts. Automaton has has 210 states, 210 states have (on average 2.057142857142857) internal successors, (432), 209 states have internal predecessors, (432), 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 793 [2022-01-31 07:26:10,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:26:11,179 INFO L225 Difference]: With dead ends: 105061 [2022-01-31 07:26:11,179 INFO L226 Difference]: Without dead ends: 105061 [2022-01-31 07:26:11,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1898 GetRequests, 1484 SyntacticMatches, 0 SemanticMatches, 414 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26980 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=64793, Invalid=107847, Unknown=0, NotChecked=0, Total=172640 [2022-01-31 07:26:11,189 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 13163 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 4247 mSolverCounterSat, 2481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13164 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 6728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2481 IncrementalHoareTripleChecker+Valid, 4247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-01-31 07:26:11,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13164 Valid, 52 Invalid, 6728 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2481 Valid, 4247 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-01-31 07:26:11,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105061 states. [2022-01-31 07:26:11,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105061 to 1026. [2022-01-31 07:26:11,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 1020 states have (on average 1.2470588235294118) internal successors, (1272), 1020 states have internal predecessors, (1272), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:26:11,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1277 transitions. [2022-01-31 07:26:11,640 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1277 transitions. Word has length 793 [2022-01-31 07:26:11,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:26:11,640 INFO L470 AbstractCegarLoop]: Abstraction has 1026 states and 1277 transitions. [2022-01-31 07:26:11,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 210 states, 210 states have (on average 2.057142857142857) internal successors, (432), 209 states have internal predecessors, (432), 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) [2022-01-31 07:26:11,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1277 transitions. [2022-01-31 07:26:11,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1002 [2022-01-31 07:26:11,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:26:11,647 INFO L514 BasicCegarLoop]: trace histogram [206, 206, 143, 143, 143, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:26:11,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-01-31 07:26:11,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 07:26:11,869 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:26:11,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:26:11,870 INFO L85 PathProgramCache]: Analyzing trace with hash 862558246, now seen corresponding path program 9 times [2022-01-31 07:26:11,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:26:11,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685193448] [2022-01-31 07:26:11,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:26:11,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:26:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:26:23,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:26:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:26:23,484 INFO L134 CoverageAnalysis]: Checked inductivity of 83191 backedges. 0 proven. 42436 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2022-01-31 07:26:23,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:26:23,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685193448] [2022-01-31 07:26:23,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685193448] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:26:23,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556146928] [2022-01-31 07:26:23,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 07:26:23,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:26:23,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:26:23,485 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:26:23,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 07:26:23,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-01-31 07:26:23,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:26:23,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-31 07:26:23,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:26:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 83191 backedges. 3027 proven. 51 refuted. 0 times theorem prover too weak. 80113 trivial. 0 not checked. [2022-01-31 07:26:25,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:26:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 83191 backedges. 3027 proven. 51 refuted. 0 times theorem prover too weak. 80113 trivial. 0 not checked. [2022-01-31 07:26:27,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556146928] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:26:27,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:26:27,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [210, 12, 12] total 229 [2022-01-31 07:26:27,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054688248] [2022-01-31 07:26:27,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:26:27,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 229 states [2022-01-31 07:26:27,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:26:27,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 229 interpolants. [2022-01-31 07:26:27,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23755, Invalid=28457, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 07:26:27,172 INFO L87 Difference]: Start difference. First operand 1026 states and 1277 transitions. Second operand has 229 states, 229 states have (on average 2.126637554585153) internal successors, (487), 228 states have internal predecessors, (487), 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)