/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/reducercommutativity/sep20-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:38:06,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:38:06,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:38:06,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 08:38:06,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 08:38:06,228 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 08:38:06,230 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 08:38:06,235 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 08:38:06,237 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 08:38:06,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 08:38:06,242 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 08:38:06,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 08:38:06,244 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:38:06,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:38:06,247 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:38:06,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:38:06,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:38:06,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:38:06,254 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:38:06,259 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:38:06,260 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:38:06,261 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:38:06,263 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:38:06,263 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:38:06,269 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 08:38:06,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:38:06,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:38:06,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:38:06,284 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:38:06,297 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:38:06,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:38:06,299 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:38:06,300 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:38:06,300 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:38:06,300 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:38:06,300 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:38:06,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:38:06,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:38:06,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:38:06,301 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:38:06,301 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:38:06,301 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:38:06,301 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:38:06,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:38:06,302 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:38:06,302 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:38:06,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:38:06,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:38:06,302 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:38:06,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:38:06,303 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:38:06,303 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:38:06,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:38:06,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:38:06,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:38:06,550 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:38:06,552 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:38:06,553 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep20-1.i [2022-01-31 08:38:06,617 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d1c7750f/94f99e7a79b74b368c43975cd277dfec/FLAG103d4b234 [2022-01-31 08:38:07,053 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:38:07,054 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep20-1.i [2022-01-31 08:38:07,061 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d1c7750f/94f99e7a79b74b368c43975cd277dfec/FLAG103d4b234 [2022-01-31 08:38:07,074 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d1c7750f/94f99e7a79b74b368c43975cd277dfec [2022-01-31 08:38:07,076 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:38:07,078 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:38:07,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:38:07,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:38:07,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:38:07,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:38:07" (1/1) ... [2022-01-31 08:38:07,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d67e06c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:07, skipping insertion in model container [2022-01-31 08:38:07,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:38:07" (1/1) ... [2022-01-31 08:38:07,095 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:38:07,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:38:07,270 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep20-1.i[1293,1306] [2022-01-31 08:38:07,272 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:38:07,280 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:38:07,312 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep20-1.i[1293,1306] [2022-01-31 08:38:07,313 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:38:07,325 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:38:07,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:07 WrapperNode [2022-01-31 08:38:07,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:38:07,326 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:38:07,326 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:38:07,326 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:38:07,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:07" (1/1) ... [2022-01-31 08:38:07,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:07" (1/1) ... [2022-01-31 08:38:07,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:07" (1/1) ... [2022-01-31 08:38:07,352 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:07" (1/1) ... [2022-01-31 08:38:07,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:07" (1/1) ... [2022-01-31 08:38:07,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:07" (1/1) ... [2022-01-31 08:38:07,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:07" (1/1) ... [2022-01-31 08:38:07,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:38:07,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:38:07,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:38:07,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:38:07,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:07" (1/1) ... [2022-01-31 08:38:07,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:38:07,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:07,392 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 08:38:07,394 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 08:38:07,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:38:07,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:38:07,424 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:38:07,424 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-01-31 08:38:07,424 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:38:07,425 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:38:07,425 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:38:07,425 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 08:38:07,426 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 08:38:07,426 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:38:07,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:38:07,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 08:38:07,426 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-01-31 08:38:07,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:38:07,427 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:38:07,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:38:07,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:38:07,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:38:07,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:38:07,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:38:07,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:38:07,485 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:38:07,487 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:38:07,676 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:38:07,682 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:38:07,682 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 08:38:07,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:38:07 BoogieIcfgContainer [2022-01-31 08:38:07,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:38:07,684 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:38:07,684 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:38:07,685 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:38:07,688 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:38:07" (1/1) ... [2022-01-31 08:38:07,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:38:07 BasicIcfg [2022-01-31 08:38:07,711 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:38:07,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:38:07,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:38:07,715 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:38:07,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:38:07" (1/4) ... [2022-01-31 08:38:07,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b4ead6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:38:07, skipping insertion in model container [2022-01-31 08:38:07,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:07" (2/4) ... [2022-01-31 08:38:07,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b4ead6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:38:07, skipping insertion in model container [2022-01-31 08:38:07,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:38:07" (3/4) ... [2022-01-31 08:38:07,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b4ead6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:38:07, skipping insertion in model container [2022-01-31 08:38:07,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:38:07" (4/4) ... [2022-01-31 08:38:07,718 INFO L111 eAbstractionObserver]: Analyzing ICFG sep20-1.iJordan [2022-01-31 08:38:07,723 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:38:07,723 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:38:07,766 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:38:07,789 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 08:38:07,789 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:38:07,816 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 08:38:07,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 08:38:07,835 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:07,836 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:07,836 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:07,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:07,841 INFO L85 PathProgramCache]: Analyzing trace with hash 820388973, now seen corresponding path program 1 times [2022-01-31 08:38:07,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:07,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517746495] [2022-01-31 08:38:07,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:07,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:08,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:08,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:08,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:38:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:08,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 08:38:08,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:08,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:38:08,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 08:38:08,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:08,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517746495] [2022-01-31 08:38:08,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517746495] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:38:08,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:38:08,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 08:38:08,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958691533] [2022-01-31 08:38:08,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:38:08,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:38:08,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:08,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:38:08,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:38:08,156 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:38:08,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:08,212 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2022-01-31 08:38:08,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:38:08,216 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-01-31 08:38:08,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:08,224 INFO L225 Difference]: With dead ends: 32 [2022-01-31 08:38:08,224 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 08:38:08,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 08:38:08,234 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:08,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:38:08,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 08:38:08,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-31 08:38:08,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:38:08,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-01-31 08:38:08,272 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 32 [2022-01-31 08:38:08,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:08,272 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-01-31 08:38:08,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:38:08,272 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-01-31 08:38:08,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 08:38:08,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:08,275 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:08,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:38:08,276 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:08,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:08,277 INFO L85 PathProgramCache]: Analyzing trace with hash 676191406, now seen corresponding path program 1 times [2022-01-31 08:38:08,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:08,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355059356] [2022-01-31 08:38:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:08,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:08,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:08,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:08,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:38:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:08,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 08:38:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:08,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:38:08,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 08:38:08,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:08,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355059356] [2022-01-31 08:38:08,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355059356] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:08,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381730792] [2022-01-31 08:38:08,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:08,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:08,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:08,416 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 08:38:08,444 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 08:38:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:08,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:38:08,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:08,645 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 08:38:08,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:38:08,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381730792] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:38:08,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:38:08,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 08:38:08,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507771210] [2022-01-31 08:38:08,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:38:08,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:38:08,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:08,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:38:08,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:38:08,663 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:38:08,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:08,677 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2022-01-31 08:38:08,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:38:08,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-01-31 08:38:08,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:08,679 INFO L225 Difference]: With dead ends: 29 [2022-01-31 08:38:08,679 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 08:38:08,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:38:08,681 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:08,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:38:08,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 08:38:08,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-01-31 08:38:08,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:38:08,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-01-31 08:38:08,687 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 32 [2022-01-31 08:38:08,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:08,687 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-01-31 08:38:08,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:38:08,688 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-01-31 08:38:08,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 08:38:08,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:08,689 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:08,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 08:38:08,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:08,904 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:08,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:08,905 INFO L85 PathProgramCache]: Analyzing trace with hash -941288240, now seen corresponding path program 1 times [2022-01-31 08:38:08,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:08,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429483068] [2022-01-31 08:38:08,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:08,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:08,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:08,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:08,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:38:08,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:08,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 08:38:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:08,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 08:38:09,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 08:38:09,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:09,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429483068] [2022-01-31 08:38:09,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429483068] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:09,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354587573] [2022-01-31 08:38:09,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:09,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:09,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:09,017 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 08:38:09,032 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 08:38:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:09,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:38:09,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:09,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 08:38:09,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:38:09,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354587573] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:38:09,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:38:09,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-01-31 08:38:09,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443828427] [2022-01-31 08:38:09,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:38:09,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:38:09,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:09,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:38:09,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:38:09,153 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:38:09,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:09,161 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2022-01-31 08:38:09,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:38:09,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-01-31 08:38:09,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:09,162 INFO L225 Difference]: With dead ends: 31 [2022-01-31 08:38:09,162 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 08:38:09,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:38:09,163 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:09,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:38:09,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 08:38:09,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-01-31 08:38:09,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:38:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-01-31 08:38:09,169 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 34 [2022-01-31 08:38:09,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:09,169 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-01-31 08:38:09,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:38:09,170 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-01-31 08:38:09,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 08:38:09,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:09,171 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:09,193 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 08:38:09,391 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,SelfDestructingSolverStorable2 [2022-01-31 08:38:09,392 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:09,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:09,392 INFO L85 PathProgramCache]: Analyzing trace with hash -996630189, now seen corresponding path program 1 times [2022-01-31 08:38:09,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:09,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192449752] [2022-01-31 08:38:09,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:09,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:09,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:09,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:09,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:38:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:09,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 08:38:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:09,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 08:38:09,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:09,476 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-31 08:38:09,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:09,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192449752] [2022-01-31 08:38:09,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192449752] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:09,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437238864] [2022-01-31 08:38:09,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:09,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:09,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:09,478 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 08:38:09,486 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 08:38:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:09,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:38:09,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:09,658 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 08:38:09,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:38:09,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437238864] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:38:09,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:38:09,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 08:38:09,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215262283] [2022-01-31 08:38:09,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:38:09,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:38:09,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:09,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:38:09,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:38:09,669 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:38:09,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:09,678 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-01-31 08:38:09,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:38:09,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2022-01-31 08:38:09,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:09,680 INFO L225 Difference]: With dead ends: 31 [2022-01-31 08:38:09,680 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 08:38:09,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:38:09,681 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:09,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:38:09,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 08:38:09,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-01-31 08:38:09,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:38:09,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-01-31 08:38:09,685 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 43 [2022-01-31 08:38:09,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:09,686 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-01-31 08:38:09,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:38:09,687 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-01-31 08:38:09,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 08:38:09,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:09,688 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:09,705 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 08:38:09,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:09,892 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:09,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:09,892 INFO L85 PathProgramCache]: Analyzing trace with hash -673044969, now seen corresponding path program 1 times [2022-01-31 08:38:09,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:09,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383631058] [2022-01-31 08:38:09,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:09,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:09,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:09,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:38:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:09,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 08:38:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:09,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 08:38:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:09,966 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 08:38:09,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:09,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383631058] [2022-01-31 08:38:09,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383631058] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:09,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549841887] [2022-01-31 08:38:09,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:09,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:09,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:09,968 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 08:38:09,969 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 08:38:10,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:10,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:38:10,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 08:38:10,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:38:10,246 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 08:38:10,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549841887] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:38:10,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:38:10,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:38:10,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733521740] [2022-01-31 08:38:10,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:38:10,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:38:10,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:10,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:38:10,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:38:10,249 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:38:10,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:10,344 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-01-31 08:38:10,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:38:10,344 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-01-31 08:38:10,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:10,346 INFO L225 Difference]: With dead ends: 36 [2022-01-31 08:38:10,346 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 08:38:10,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 08:38:10,350 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 30 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:10,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 34 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:38:10,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 08:38:10,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-01-31 08:38:10,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:38:10,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-01-31 08:38:10,364 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 45 [2022-01-31 08:38:10,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:10,364 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-01-31 08:38:10,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:38:10,365 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-01-31 08:38:10,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 08:38:10,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:10,370 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:10,395 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 08:38:10,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:10,571 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:10,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:10,572 INFO L85 PathProgramCache]: Analyzing trace with hash -322190095, now seen corresponding path program 2 times [2022-01-31 08:38:10,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:10,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712967337] [2022-01-31 08:38:10,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:10,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:10,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:10,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 08:38:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:10,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 08:38:10,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:10,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 08:38:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 08:38:10,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:10,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712967337] [2022-01-31 08:38:10,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712967337] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:10,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882015707] [2022-01-31 08:38:10,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:38:10,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:10,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:10,684 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 08:38:10,699 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 08:38:10,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:38:10,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:38:10,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:38:10,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:10,881 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 08:38:10,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:38:11,019 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 08:38:11,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882015707] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:38:11,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:38:11,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-01-31 08:38:11,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405248995] [2022-01-31 08:38:11,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:38:11,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 08:38:11,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:11,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 08:38:11,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-31 08:38:11,021 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-31 08:38:11,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:11,226 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2022-01-31 08:38:11,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 08:38:11,227 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-01-31 08:38:11,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:11,228 INFO L225 Difference]: With dead ends: 53 [2022-01-31 08:38:11,228 INFO L226 Difference]: Without dead ends: 53 [2022-01-31 08:38:11,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2022-01-31 08:38:11,229 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 58 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:11,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 37 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:38:11,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-31 08:38:11,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2022-01-31 08:38:11,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:38:11,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-01-31 08:38:11,234 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 51 [2022-01-31 08:38:11,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:11,234 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-01-31 08:38:11,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-31 08:38:11,235 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-01-31 08:38:11,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 08:38:11,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:11,255 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:11,283 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 08:38:11,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:11,472 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:11,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:11,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1650423198, now seen corresponding path program 3 times [2022-01-31 08:38:11,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:11,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674011794] [2022-01-31 08:38:11,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:11,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:11,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:11,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 08:38:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:11,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 08:38:11,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:11,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 08:38:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-01-31 08:38:11,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:11,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674011794] [2022-01-31 08:38:11,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674011794] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:11,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057714406] [2022-01-31 08:38:11,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:38:11,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:11,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:11,578 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 08:38:11,579 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 08:38:11,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 08:38:11,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:38:11,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:38:11,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-01-31 08:38:11,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:38:11,837 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-01-31 08:38:11,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057714406] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:38:11,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:38:11,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:38:11,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131371627] [2022-01-31 08:38:11,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:38:11,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:38:11,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:11,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:38:11,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:38:11,839 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 08:38:11,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:11,942 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2022-01-31 08:38:11,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:38:11,942 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 72 [2022-01-31 08:38:11,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:11,945 INFO L225 Difference]: With dead ends: 57 [2022-01-31 08:38:11,945 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 08:38:11,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 08:38:11,946 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:11,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 44 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:38:11,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 08:38:11,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-01-31 08:38:11,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:38:11,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2022-01-31 08:38:11,964 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 72 [2022-01-31 08:38:11,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:11,964 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2022-01-31 08:38:11,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 08:38:11,964 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2022-01-31 08:38:11,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 08:38:11,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:11,965 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:11,994 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 08:38:12,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:12,192 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:12,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:12,192 INFO L85 PathProgramCache]: Analyzing trace with hash 831180370, now seen corresponding path program 4 times [2022-01-31 08:38:12,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:12,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988521776] [2022-01-31 08:38:12,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:12,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:12,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:12,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:12,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 08:38:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:12,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 08:38:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:12,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 08:38:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:12,353 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-01-31 08:38:12,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:12,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988521776] [2022-01-31 08:38:12,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988521776] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:12,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112218550] [2022-01-31 08:38:12,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:38:12,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:12,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:12,355 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 08:38:12,381 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 08:38:12,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:38:12,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:38:12,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 08:38:12,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-01-31 08:38:12,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:38:12,708 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-01-31 08:38:12,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112218550] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:38:12,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:38:12,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-01-31 08:38:12,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896444945] [2022-01-31 08:38:12,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:38:12,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 08:38:12,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:12,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 08:38:12,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-01-31 08:38:12,712 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:38:13,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:13,089 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2022-01-31 08:38:13,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 08:38:13,090 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 78 [2022-01-31 08:38:13,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:13,091 INFO L225 Difference]: With dead ends: 72 [2022-01-31 08:38:13,091 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 08:38:13,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 08:38:13,092 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 80 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:13,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 67 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:38:13,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 08:38:13,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-01-31 08:38:13,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 63 states have internal predecessors, (72), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:38:13,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2022-01-31 08:38:13,096 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 78 [2022-01-31 08:38:13,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:13,096 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2022-01-31 08:38:13,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:38:13,096 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2022-01-31 08:38:13,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 08:38:13,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:13,097 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 11, 11, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:13,124 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 08:38:13,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:13,298 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:13,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:13,299 INFO L85 PathProgramCache]: Analyzing trace with hash -223833676, now seen corresponding path program 5 times [2022-01-31 08:38:13,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:13,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677392767] [2022-01-31 08:38:13,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:13,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:13,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:13,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:13,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 08:38:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:13,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 08:38:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:13,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-01-31 08:38:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:13,531 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-01-31 08:38:13,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:13,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677392767] [2022-01-31 08:38:13,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677392767] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:13,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523793766] [2022-01-31 08:38:13,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:38:13,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:13,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:13,533 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 08:38:13,564 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 08:38:13,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-01-31 08:38:13,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:38:13,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 08:38:13,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2022-01-31 08:38:14,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:38:14,450 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-01-31 08:38:14,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523793766] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:38:14,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:38:14,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2022-01-31 08:38:14,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740712939] [2022-01-31 08:38:14,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:38:14,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 08:38:14,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:14,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 08:38:14,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-01-31 08:38:14,452 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:38:14,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:14,995 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2022-01-31 08:38:14,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 08:38:14,996 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2022-01-31 08:38:14,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:14,997 INFO L225 Difference]: With dead ends: 98 [2022-01-31 08:38:14,997 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 08:38:14,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=2340, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 08:38:14,999 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 167 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:14,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 52 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:38:15,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 08:38:15,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-01-31 08:38:15,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 89 states have (on average 1.1910112359550562) internal successors, (106), 89 states have internal predecessors, (106), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:38:15,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 115 transitions. [2022-01-31 08:38:15,004 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 115 transitions. Word has length 116 [2022-01-31 08:38:15,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:15,004 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 115 transitions. [2022-01-31 08:38:15,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:38:15,004 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 115 transitions. [2022-01-31 08:38:15,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 08:38:15,006 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:15,006 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 12, 12, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:15,028 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 08:38:15,219 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,SelfDestructingSolverStorable8 [2022-01-31 08:38:15,220 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:15,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:15,220 INFO L85 PathProgramCache]: Analyzing trace with hash 502059094, now seen corresponding path program 6 times [2022-01-31 08:38:15,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:15,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305409176] [2022-01-31 08:38:15,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:15,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:15,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:15,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 08:38:15,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:15,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 08:38:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:15,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-01-31 08:38:15,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2740 trivial. 0 not checked. [2022-01-31 08:38:15,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:15,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305409176] [2022-01-31 08:38:15,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305409176] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:15,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022248956] [2022-01-31 08:38:15,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 08:38:15,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:15,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:15,478 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 08:38:15,506 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 08:38:15,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-31 08:38:15,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:38:15,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:38:15,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:15,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 1242 proven. 16 refuted. 0 times theorem prover too weak. 1626 trivial. 0 not checked. [2022-01-31 08:38:15,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:38:16,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2868 trivial. 0 not checked. [2022-01-31 08:38:16,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022248956] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:38:16,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:38:16,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 7] total 26 [2022-01-31 08:38:16,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085463872] [2022-01-31 08:38:16,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:38:16,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 08:38:16,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:16,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 08:38:16,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2022-01-31 08:38:16,243 INFO L87 Difference]: Start difference. First operand 97 states and 115 transitions. Second operand has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:38:16,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:16,662 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2022-01-31 08:38:16,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 08:38:16,662 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 190 [2022-01-31 08:38:16,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:16,663 INFO L225 Difference]: With dead ends: 112 [2022-01-31 08:38:16,663 INFO L226 Difference]: Without dead ends: 112 [2022-01-31 08:38:16,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=510, Invalid=1842, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 08:38:16,664 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 66 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:16,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 57 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:38:16,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-31 08:38:16,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2022-01-31 08:38:16,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 103 states have (on average 1.1650485436893203) internal successors, (120), 103 states have internal predecessors, (120), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:38:16,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 129 transitions. [2022-01-31 08:38:16,669 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 129 transitions. Word has length 190 [2022-01-31 08:38:16,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:16,669 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 129 transitions. [2022-01-31 08:38:16,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:38:16,669 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 129 transitions. [2022-01-31 08:38:16,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-01-31 08:38:16,671 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:16,671 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 13, 13, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:16,697 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 08:38:16,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 08:38:16,872 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:16,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:16,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1107414944, now seen corresponding path program 7 times [2022-01-31 08:38:16,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:16,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511160763] [2022-01-31 08:38:16,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:16,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:17,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:17,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 08:38:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:17,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 08:38:17,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:17,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-01-31 08:38:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:17,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2993 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2824 trivial. 0 not checked. [2022-01-31 08:38:17,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:17,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511160763] [2022-01-31 08:38:17,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511160763] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:17,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004768680] [2022-01-31 08:38:17,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 08:38:17,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:17,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:17,192 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 08:38:17,219 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 08:38:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:17,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 08:38:17,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:17,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2993 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2824 trivial. 0 not checked. [2022-01-31 08:38:17,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:38:17,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2993 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2824 trivial. 0 not checked. [2022-01-31 08:38:17,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004768680] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:38:17,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:38:17,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 24 [2022-01-31 08:38:17,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675804069] [2022-01-31 08:38:17,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:38:17,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 08:38:17,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:17,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 08:38:17,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 08:38:18,000 INFO L87 Difference]: Start difference. First operand 111 states and 129 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:38:18,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:18,326 INFO L93 Difference]: Finished difference Result 125 states and 143 transitions. [2022-01-31 08:38:18,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 08:38:18,327 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 204 [2022-01-31 08:38:18,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:18,328 INFO L225 Difference]: With dead ends: 125 [2022-01-31 08:38:18,328 INFO L226 Difference]: Without dead ends: 125 [2022-01-31 08:38:18,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 408 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=716, Invalid=1176, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 08:38:18,329 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 60 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:18,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 44 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:38:18,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-31 08:38:18,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-01-31 08:38:18,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 117 states have (on average 1.1452991452991452) internal successors, (134), 117 states have internal predecessors, (134), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:38:18,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 143 transitions. [2022-01-31 08:38:18,333 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 143 transitions. Word has length 204 [2022-01-31 08:38:18,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:18,333 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 143 transitions. [2022-01-31 08:38:18,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:38:18,333 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 143 transitions. [2022-01-31 08:38:18,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-01-31 08:38:18,335 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:18,335 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 20, 20, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:18,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 08:38:18,559 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,SelfDestructingSolverStorable10 [2022-01-31 08:38:18,559 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:18,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:18,560 INFO L85 PathProgramCache]: Analyzing trace with hash 476398030, now seen corresponding path program 8 times [2022-01-31 08:38:18,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:18,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13801687] [2022-01-31 08:38:18,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:18,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:18,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:18,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 08:38:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:18,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 08:38:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:18,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-01-31 08:38:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:18,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3224 backedges. 0 proven. 1527 refuted. 0 times theorem prover too weak. 1697 trivial. 0 not checked. [2022-01-31 08:38:18,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:18,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13801687] [2022-01-31 08:38:18,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13801687] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:18,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791596318] [2022-01-31 08:38:18,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:38:18,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:18,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:18,846 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 08:38:18,871 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 08:38:19,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:38:19,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:38:19,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 08:38:19,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3224 backedges. 1236 proven. 287 refuted. 0 times theorem prover too weak. 1701 trivial. 0 not checked. [2022-01-31 08:38:19,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:38:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3224 backedges. 0 proven. 1527 refuted. 0 times theorem prover too weak. 1697 trivial. 0 not checked. [2022-01-31 08:38:19,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791596318] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:38:19,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:38:19,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 23 [2022-01-31 08:38:19,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311565977] [2022-01-31 08:38:19,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:38:19,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 08:38:19,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:19,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 08:38:19,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 08:38:19,760 INFO L87 Difference]: Start difference. First operand 125 states and 143 transitions. Second operand has 23 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 22 states have internal predecessors, (91), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:38:20,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:20,116 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2022-01-31 08:38:20,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 08:38:20,116 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 22 states have internal predecessors, (91), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 218 [2022-01-31 08:38:20,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:20,117 INFO L225 Difference]: With dead ends: 143 [2022-01-31 08:38:20,117 INFO L226 Difference]: Without dead ends: 143 [2022-01-31 08:38:20,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 458 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 08:38:20,119 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 163 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:20,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 54 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:38:20,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-31 08:38:20,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-01-31 08:38:20,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 135 states have (on average 1.1703703703703703) internal successors, (158), 135 states have internal predecessors, (158), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:38:20,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 167 transitions. [2022-01-31 08:38:20,123 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 167 transitions. Word has length 218 [2022-01-31 08:38:20,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:20,123 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 167 transitions. [2022-01-31 08:38:20,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 22 states have internal predecessors, (91), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:38:20,123 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 167 transitions. [2022-01-31 08:38:20,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-01-31 08:38:20,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:20,126 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 20, 20, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:20,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 08:38:20,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 08:38:20,336 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:20,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:20,336 INFO L85 PathProgramCache]: Analyzing trace with hash 119913582, now seen corresponding path program 9 times [2022-01-31 08:38:20,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:20,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060010276] [2022-01-31 08:38:20,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:20,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:20,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:20,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:20,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 08:38:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:20,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 08:38:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:20,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2022-01-31 08:38:20,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:20,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6005 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2022-01-31 08:38:20,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:20,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060010276] [2022-01-31 08:38:20,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060010276] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:20,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371245058] [2022-01-31 08:38:20,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:38:20,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:20,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:20,628 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:38:20,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 08:38:21,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-01-31 08:38:21,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:38:21,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 08:38:21,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6005 backedges. 2490 proven. 100 refuted. 0 times theorem prover too weak. 3415 trivial. 0 not checked. [2022-01-31 08:38:21,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:38:22,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6005 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2022-01-31 08:38:22,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371245058] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:38:22,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:38:22,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 23 [2022-01-31 08:38:22,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001821901] [2022-01-31 08:38:22,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:38:22,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 08:38:22,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:22,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 08:38:22,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 08:38:22,178 INFO L87 Difference]: Start difference. First operand 143 states and 167 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 08:38:22,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:22,499 INFO L93 Difference]: Finished difference Result 161 states and 185 transitions. [2022-01-31 08:38:22,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 08:38:22,499 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 272 [2022-01-31 08:38:22,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:22,501 INFO L225 Difference]: With dead ends: 161 [2022-01-31 08:38:22,501 INFO L226 Difference]: Without dead ends: 161 [2022-01-31 08:38:22,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 542 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=652, Invalid=1070, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 08:38:22,502 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 58 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:22,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 54 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:38:22,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-01-31 08:38:22,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-01-31 08:38:22,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 153 states have (on average 1.1503267973856208) internal successors, (176), 153 states have internal predecessors, (176), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:38:22,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 185 transitions. [2022-01-31 08:38:22,506 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 185 transitions. Word has length 272 [2022-01-31 08:38:22,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:22,506 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 185 transitions. [2022-01-31 08:38:22,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 08:38:22,507 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 185 transitions. [2022-01-31 08:38:22,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-01-31 08:38:22,510 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:22,510 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:22,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 08:38:22,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 08:38:22,710 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:22,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:22,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1244686474, now seen corresponding path program 10 times [2022-01-31 08:38:22,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:22,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759589573] [2022-01-31 08:38:22,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:22,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:25,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:25,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:25,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 08:38:25,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:26,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 08:38:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:26,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2022-01-31 08:38:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:27,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 116 proven. 5524 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2022-01-31 08:38:27,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:27,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759589573] [2022-01-31 08:38:27,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759589573] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:27,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965725082] [2022-01-31 08:38:27,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:38:27,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:27,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:27,700 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:38:27,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 08:38:30,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:38:30,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:38:30,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 148 conjunts are in the unsatisfiable core [2022-01-31 08:38:30,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:32,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 0 proven. 5310 refuted. 0 times theorem prover too weak. 956 trivial. 0 not checked. [2022-01-31 08:38:32,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:38:36,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 0 proven. 5316 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2022-01-31 08:38:36,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965725082] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:38:36,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:38:36,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 30, 32] total 97 [2022-01-31 08:38:36,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631518840] [2022-01-31 08:38:36,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:38:36,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 08:38:36,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:36,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 08:38:36,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=9012, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 08:38:36,060 INFO L87 Difference]: Start difference. First operand 161 states and 185 transitions. Second operand has 97 states, 95 states have (on average 2.4947368421052634) internal successors, (237), 88 states have internal predecessors, (237), 6 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2022-01-31 08:38:45,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:45,579 INFO L93 Difference]: Finished difference Result 904 states and 1310 transitions. [2022-01-31 08:38:45,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 08:38:45,579 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 95 states have (on average 2.4947368421052634) internal successors, (237), 88 states have internal predecessors, (237), 6 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) Word has length 290 [2022-01-31 08:38:45,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:45,602 INFO L225 Difference]: With dead ends: 904 [2022-01-31 08:38:45,603 INFO L226 Difference]: Without dead ends: 902 [2022-01-31 08:38:45,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 734 GetRequests, 568 SyntacticMatches, 10 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6360 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=703, Invalid=24103, Unknown=0, NotChecked=0, Total=24806 [2022-01-31 08:38:45,608 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 282 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 17791 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 18085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 17791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:45,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 358 Invalid, 18085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 17791 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-01-31 08:38:45,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2022-01-31 08:38:45,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 588. [2022-01-31 08:38:45,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 577 states have (on average 1.2859618717504333) internal successors, (742), 578 states have internal predecessors, (742), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-01-31 08:38:45,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 759 transitions. [2022-01-31 08:38:45,690 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 759 transitions. Word has length 290 [2022-01-31 08:38:45,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:45,690 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 759 transitions. [2022-01-31 08:38:45,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 95 states have (on average 2.4947368421052634) internal successors, (237), 88 states have internal predecessors, (237), 6 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2022-01-31 08:38:45,691 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 759 transitions. [2022-01-31 08:38:45,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-01-31 08:38:45,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:45,695 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 59, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:45,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 08:38:45,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 08:38:45,923 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:45,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:45,924 INFO L85 PathProgramCache]: Analyzing trace with hash -562767989, now seen corresponding path program 1 times [2022-01-31 08:38:45,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:45,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162563197] [2022-01-31 08:38:45,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:45,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:48,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:48,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 08:38:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:48,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 08:38:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:48,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2022-01-31 08:38:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:49,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2489 proven. 2346 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [2022-01-31 08:38:49,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:49,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162563197] [2022-01-31 08:38:49,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162563197] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:49,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051598211] [2022-01-31 08:38:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:49,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:49,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:49,595 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:38:49,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 08:38:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:49,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 73 conjunts are in the unsatisfiable core [2022-01-31 08:38:49,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:50,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-01-31 08:38:51,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-31 08:38:53,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2491 proven. 1872 refuted. 0 times theorem prover too weak. 1903 trivial. 0 not checked. [2022-01-31 08:38:53,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:38:55,953 INFO L353 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-01-31 08:38:55,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-01-31 08:38:56,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2546 proven. 1815 refuted. 0 times theorem prover too weak. 1905 trivial. 0 not checked. [2022-01-31 08:38:56,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051598211] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:38:56,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:38:56,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 32, 30] total 106 [2022-01-31 08:38:56,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566415936] [2022-01-31 08:38:56,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:38:56,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 08:38:56,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:56,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 08:38:56,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=10750, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 08:38:56,125 INFO L87 Difference]: Start difference. First operand 588 states and 759 transitions. Second operand has 106 states, 104 states have (on average 2.8076923076923075) internal successors, (292), 102 states have internal predecessors, (292), 4 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-31 08:39:10,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:39:10,093 INFO L93 Difference]: Finished difference Result 2636 states and 3563 transitions. [2022-01-31 08:39:10,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2022-01-31 08:39:10,094 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 104 states have (on average 2.8076923076923075) internal successors, (292), 102 states have internal predecessors, (292), 4 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 290 [2022-01-31 08:39:10,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:39:10,106 INFO L225 Difference]: With dead ends: 2636 [2022-01-31 08:39:10,107 INFO L226 Difference]: Without dead ends: 2610 [2022-01-31 08:39:10,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 886 GetRequests, 612 SyntacticMatches, 24 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 18706 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=2291, Invalid=60961, Unknown=0, NotChecked=0, Total=63252 [2022-01-31 08:39:10,112 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 572 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 7144 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 10952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 7144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3661 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-01-31 08:39:10,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 308 Invalid, 10952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 7144 Invalid, 0 Unknown, 3661 Unchecked, 3.4s Time] [2022-01-31 08:39:10,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2610 states. [2022-01-31 08:39:10,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2610 to 2023. [2022-01-31 08:39:10,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2004 states have (on average 1.3298403193612773) internal successors, (2665), 2010 states have internal predecessors, (2665), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (43), 8 states have call predecessors, (43), 8 states have call successors, (43) [2022-01-31 08:39:10,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 2717 transitions. [2022-01-31 08:39:10,174 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 2717 transitions. Word has length 290 [2022-01-31 08:39:10,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:39:10,174 INFO L470 AbstractCegarLoop]: Abstraction has 2023 states and 2717 transitions. [2022-01-31 08:39:10,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 104 states have (on average 2.8076923076923075) internal successors, (292), 102 states have internal predecessors, (292), 4 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-31 08:39:10,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 2717 transitions. [2022-01-31 08:39:10,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-01-31 08:39:10,188 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:39:10,189 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 59, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:39:10,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-31 08:39:10,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:39:10,403 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:39:10,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:39:10,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1373769193, now seen corresponding path program 2 times [2022-01-31 08:39:10,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:39:10,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221282833] [2022-01-31 08:39:10,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:39:10,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:39:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:39:13,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:39:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:39:13,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 08:39:13,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:39:14,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 08:39:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:39:14,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2022-01-31 08:39:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:39:15,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 1552 proven. 4066 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-01-31 08:39:15,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:39:15,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221282833] [2022-01-31 08:39:15,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221282833] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:39:15,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693995733] [2022-01-31 08:39:15,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:39:15,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:39:15,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:39:15,436 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:39:15,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 08:39:15,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:39:15,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:39:15,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 221 conjunts are in the unsatisfiable core [2022-01-31 08:39:15,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:39:17,753 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 08:39:17,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:39:17,897 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 08:39:17,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:39:18,019 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 08:39:18,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:39:18,133 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 08:39:18,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:39:18,264 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 08:39:18,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:39:18,375 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 08:39:18,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:39:18,484 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 08:39:18,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:39:18,591 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 08:39:18,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:39:18,693 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 08:39:18,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:39:18,795 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 08:39:18,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:39:18,906 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 08:39:18,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:39:19,011 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 08:39:19,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:39:19,136 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 08:39:19,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:39:19,247 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 08:39:19,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:39:19,358 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 08:39:19,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:39:19,497 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 08:39:19,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:39:19,638 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 08:39:19,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:39:19,783 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 08:39:19,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:39:19,942 INFO L353 Elim1Store]: treesize reduction 80, result has 14.0 percent of original size [2022-01-31 08:39:19,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 27 [2022-01-31 08:39:20,074 INFO L353 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2022-01-31 08:39:20,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 27 [2022-01-31 08:40:04,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2545 proven. 3127 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2022-01-31 08:40:04,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:41:17,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:41:17,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 118 [2022-01-31 08:41:17,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6