/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/sep.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:37:33,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:37:33,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:37:34,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 08:37:34,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 08:37:34,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 08:37:34,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 08:37:34,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 08:37:34,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 08:37:34,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 08:37:34,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 08:37:34,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 08:37:34,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:37:34,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:37:34,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:37:34,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:37:34,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:37:34,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:37:34,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:37:34,039 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:37:34,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:37:34,049 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:37:34,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:37:34,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:37:34,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 08:37:34,056 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 08:37:34,057 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 08:37:34,061 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 08:37:34,061 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 08:37:34,061 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 08:37:34,061 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 08:37:34,062 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 08:37:34,062 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 08:37:34,063 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 08:37:34,063 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 08:37:34,063 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 08:37:34,064 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 08:37:34,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 08:37:34,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:37:34,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:37:34,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:37:34,069 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:37:34,081 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:37:34,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:37:34,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:37:34,082 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:37:34,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:37:34,082 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:37:34,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:37:34,082 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:37:34,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:37:34,083 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:37:34,083 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:37:34,083 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:37:34,084 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:37:34,084 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:37:34,084 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:37:34,084 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:37:34,084 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:37:34,084 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:37:34,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:37:34,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:37:34,084 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:37:34,085 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:37:34,085 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:37:34,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:37:34,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:37:34,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:37:34,265 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:37:34,265 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:37:34,266 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep.i [2022-01-31 08:37:34,320 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b29cd181/0600505e3f8c4624a1dcacd945d1a576/FLAG17e34e799 [2022-01-31 08:37:34,638 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:37:34,638 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep.i [2022-01-31 08:37:34,645 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b29cd181/0600505e3f8c4624a1dcacd945d1a576/FLAG17e34e799 [2022-01-31 08:37:35,057 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b29cd181/0600505e3f8c4624a1dcacd945d1a576 [2022-01-31 08:37:35,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:37:35,062 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:37:35,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:37:35,063 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:37:35,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:37:35,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:37:35" (1/1) ... [2022-01-31 08:37:35,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4de9dafe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:37:35, skipping insertion in model container [2022-01-31 08:37:35,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:37:35" (1/1) ... [2022-01-31 08:37:35,071 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:37:35,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:37:35,208 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/sep.i[1298,1311] [2022-01-31 08:37:35,210 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:37:35,215 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:37:35,227 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/sep.i[1298,1311] [2022-01-31 08:37:35,228 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:37:35,236 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:37:35,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:37:35 WrapperNode [2022-01-31 08:37:35,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:37:35,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:37:35,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:37:35,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:37:35,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:37:35" (1/1) ... [2022-01-31 08:37:35,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:37:35" (1/1) ... [2022-01-31 08:37:35,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:37:35" (1/1) ... [2022-01-31 08:37:35,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:37:35" (1/1) ... [2022-01-31 08:37:35,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:37:35" (1/1) ... [2022-01-31 08:37:35,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:37:35" (1/1) ... [2022-01-31 08:37:35,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:37:35" (1/1) ... [2022-01-31 08:37:35,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:37:35,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:37:35,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:37:35,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:37:35,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:37:35" (1/1) ... [2022-01-31 08:37:35,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:37:35,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:37:35,292 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 08:37:35,294 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 08:37:35,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:37:35,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:37:35,318 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:37:35,319 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-01-31 08:37:35,319 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:37:35,319 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:37:35,319 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:37:35,320 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 08:37:35,320 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 08:37:35,320 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:37:35,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:37:35,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 08:37:35,320 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-01-31 08:37:35,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:37:35,321 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:37:35,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:37:35,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:37:35,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:37:35,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:37:35,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:37:35,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:37:35,378 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:37:35,379 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:37:35,557 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:37:35,562 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:37:35,562 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 08:37:35,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:37:35 BoogieIcfgContainer [2022-01-31 08:37:35,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:37:35,564 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:37:35,564 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:37:35,566 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:37:35,568 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:37:35" (1/1) ... [2022-01-31 08:37:35,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:37:35 BasicIcfg [2022-01-31 08:37:35,592 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:37:35,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:37:35,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:37:35,621 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:37:35,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:37:35" (1/4) ... [2022-01-31 08:37:35,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@291f7f6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:37:35, skipping insertion in model container [2022-01-31 08:37:35,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:37:35" (2/4) ... [2022-01-31 08:37:35,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@291f7f6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:37:35, skipping insertion in model container [2022-01-31 08:37:35,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:37:35" (3/4) ... [2022-01-31 08:37:35,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@291f7f6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:37:35, skipping insertion in model container [2022-01-31 08:37:35,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:37:35" (4/4) ... [2022-01-31 08:37:35,623 INFO L111 eAbstractionObserver]: Analyzing ICFG sep.iJordan [2022-01-31 08:37:35,627 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:37:35,627 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:37:35,682 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:37:35,703 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 08:37:35,703 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:37:35,729 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 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 08:37:35,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 08:37:35,735 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:37:35,735 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 08:37:35,736 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:37:35,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:37:35,742 INFO L85 PathProgramCache]: Analyzing trace with hash -498655796, now seen corresponding path program 1 times [2022-01-31 08:37:35,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:37:35,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777056311] [2022-01-31 08:37:35,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:37:35,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:37:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:35,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:37:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:35,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:37:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:35,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 08:37:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:35,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:37:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:36,004 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 08:37:36,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:37:36,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777056311] [2022-01-31 08:37:36,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777056311] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:37:36,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:37:36,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 08:37:36,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694164259] [2022-01-31 08:37:36,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:37:36,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:37:36,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:37:36,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:37:36,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:37:36,040 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 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), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:37:36,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:37:36,100 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2022-01-31 08:37:36,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:37:36,102 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), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-01-31 08:37:36,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:37:36,108 INFO L225 Difference]: With dead ends: 32 [2022-01-31 08:37:36,109 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 08:37:36,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 08:37:36,113 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:37:36,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 39 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:37:36,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 08:37:36,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-31 08:37:36,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 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 08:37:36,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-01-31 08:37:36,150 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2022-01-31 08:37:36,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:37:36,152 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-01-31 08:37:36,152 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), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:37:36,153 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-01-31 08:37:36,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 08:37:36,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:37:36,155 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 08:37:36,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:37:36,155 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:37:36,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:37:36,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1999360141, now seen corresponding path program 1 times [2022-01-31 08:37:36,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:37:36,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348781715] [2022-01-31 08:37:36,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:37:36,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:37:36,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:36,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:37:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:36,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:37:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:36,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 08:37:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:36,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:37:36,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:36,314 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 08:37:36,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:37:36,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348781715] [2022-01-31 08:37:36,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348781715] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:37:36,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315255110] [2022-01-31 08:37:36,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:37:36,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:37:36,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:37:36,317 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 08:37:36,318 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 08:37:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:36,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:37:36,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:37:36,509 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-31 08:37:36,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:37:36,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315255110] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:37:36,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:37:36,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-01-31 08:37:36,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283876473] [2022-01-31 08:37:36,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:37:36,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 08:37:36,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:37:36,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 08:37:36,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-31 08:37:36,522 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 08:37:36,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:37:36,549 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2022-01-31 08:37:36,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 08:37:36,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-01-31 08:37:36,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:37:36,551 INFO L225 Difference]: With dead ends: 29 [2022-01-31 08:37:36,551 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 08:37:36,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-31 08:37:36,552 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:37:36,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 42 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:37:36,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 08:37:36,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-01-31 08:37:36,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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 08:37:36,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-31 08:37:36,561 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2022-01-31 08:37:36,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:37:36,561 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-31 08:37:36,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 08:37:36,562 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-31 08:37:36,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 08:37:36,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:37:36,564 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] [2022-01-31 08:37:36,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 08:37:36,779 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 08:37:36,780 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:37:36,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:37:36,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1826689876, now seen corresponding path program 1 times [2022-01-31 08:37:36,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:37:36,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842570071] [2022-01-31 08:37:36,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:37:36,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:37:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:36,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:37:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:36,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:37:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:36,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 08:37:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:36,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 08:37:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:36,883 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-31 08:37:36,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:37:36,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842570071] [2022-01-31 08:37:36,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842570071] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:37:36,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:37:36,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 08:37:36,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291347599] [2022-01-31 08:37:36,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:37:36,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 08:37:36,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:37:36,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 08:37:36,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 08:37:36,885 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 08:37:36,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:37:36,959 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-01-31 08:37:36,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 08:37:36,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2022-01-31 08:37:36,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:37:36,960 INFO L225 Difference]: With dead ends: 29 [2022-01-31 08:37:36,960 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 08:37:36,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:37:36,961 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:37:36,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 35 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:37:36,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 08:37:36,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-01-31 08:37:36,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 20 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 08:37:36,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-31 08:37:36,964 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 41 [2022-01-31 08:37:36,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:37:36,964 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-31 08:37:36,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 08:37:36,964 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-31 08:37:36,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 08:37:36,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:37:36,965 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 08:37:36,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 08:37:36,965 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:37:36,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:37:36,966 INFO L85 PathProgramCache]: Analyzing trace with hash 2007061040, now seen corresponding path program 1 times [2022-01-31 08:37:36,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:37:36,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107185698] [2022-01-31 08:37:36,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:37:36,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:37:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:36,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:37:36,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:37,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:37:37,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:37,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 08:37:37,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:37,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 08:37:37,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 08:37:37,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:37:37,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107185698] [2022-01-31 08:37:37,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107185698] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:37:37,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121751229] [2022-01-31 08:37:37,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:37:37,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:37:37,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:37:37,031 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 08:37:37,032 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 08:37:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:37,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 08:37:37,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:37:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-31 08:37:37,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:37:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 08:37:37,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121751229] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:37:37,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:37:37,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 11 [2022-01-31 08:37:37,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667949853] [2022-01-31 08:37:37,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:37:37,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 08:37:37,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:37:37,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 08:37:37,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-01-31 08:37:37,357 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-31 08:37:37,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:37:37,494 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-01-31 08:37:37,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 08:37:37,495 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 43 [2022-01-31 08:37:37,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:37:37,495 INFO L225 Difference]: With dead ends: 33 [2022-01-31 08:37:37,495 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 08:37:37,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-01-31 08:37:37,496 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 45 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:37:37,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 47 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:37:37,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 08:37:37,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2022-01-31 08:37:37,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 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 08:37:37,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-01-31 08:37:37,501 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 43 [2022-01-31 08:37:37,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:37:37,501 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-01-31 08:37:37,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-31 08:37:37,501 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-01-31 08:37:37,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 08:37:37,503 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:37:37,503 INFO L514 BasicCegarLoop]: trace histogram [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 08:37:37,521 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 08:37:37,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 08:37:37,712 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:37:37,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:37:37,712 INFO L85 PathProgramCache]: Analyzing trace with hash -449918999, now seen corresponding path program 2 times [2022-01-31 08:37:37,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:37:37,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240998661] [2022-01-31 08:37:37,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:37:37,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:37:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:37,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:37:37,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:37,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:37:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:38,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 08:37:38,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:38,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 08:37:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:38,151 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 08:37:38,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:37:38,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240998661] [2022-01-31 08:37:38,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240998661] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:37:38,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305975672] [2022-01-31 08:37:38,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:37:38,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:37:38,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:37:38,152 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 08:37:38,153 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 08:37:38,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:37:38,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:37:38,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-31 08:37:38,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:37:38,583 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 08:37:38,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:37:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 08:37:38,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305975672] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:37:38,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:37:38,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 19 [2022-01-31 08:37:38,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456608198] [2022-01-31 08:37:38,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:37:38,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 08:37:38,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:37:38,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 08:37:38,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-01-31 08:37:38,899 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 14 states have internal predecessors, (39), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 08:37:39,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:37:39,214 INFO L93 Difference]: Finished difference Result 75 states and 103 transitions. [2022-01-31 08:37:39,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 08:37:39,214 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 14 states have internal predecessors, (39), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2022-01-31 08:37:39,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:37:39,222 INFO L225 Difference]: With dead ends: 75 [2022-01-31 08:37:39,222 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 08:37:39,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 98 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-01-31 08:37:39,224 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 52 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:37:39,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 225 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:37:39,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 08:37:39,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2022-01-31 08:37:39,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 43 states have internal predecessors, (53), 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 08:37:39,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2022-01-31 08:37:39,244 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 52 [2022-01-31 08:37:39,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:37:39,245 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2022-01-31 08:37:39,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 14 states have internal predecessors, (39), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 08:37:39,245 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2022-01-31 08:37:39,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 08:37:39,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:37:39,246 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 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] [2022-01-31 08:37:39,263 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 08:37:39,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:37:39,457 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:37:39,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:37:39,457 INFO L85 PathProgramCache]: Analyzing trace with hash 2037593834, now seen corresponding path program 1 times [2022-01-31 08:37:39,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:37:39,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208641137] [2022-01-31 08:37:39,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:37:39,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:37:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:39,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:37:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:39,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:37:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:39,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 08:37:39,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:39,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 08:37:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:39,846 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 08:37:39,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:37:39,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208641137] [2022-01-31 08:37:39,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208641137] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:37:39,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502418157] [2022-01-31 08:37:39,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:37:39,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:37:39,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:37:39,850 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 08:37:39,876 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 08:37:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:39,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-31 08:37:39,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:37:40,058 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 6 treesize of output 5 [2022-01-31 08:37:40,191 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 08:37:40,231 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 20 treesize of output 16 [2022-01-31 08:37:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 69 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 08:37:40,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:37:40,871 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 19 treesize of output 17 [2022-01-31 08:37:40,874 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 38 treesize of output 34 [2022-01-31 08:37:41,110 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 8 treesize of output 6 [2022-01-31 08:37:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 67 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:37:41,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502418157] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:37:41,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:37:41,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 19] total 44 [2022-01-31 08:37:41,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571459020] [2022-01-31 08:37:41,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:37:41,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 08:37:41,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:37:41,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 08:37:41,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1649, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 08:37:41,243 INFO L87 Difference]: Start difference. First operand 53 states and 70 transitions. Second operand has 44 states, 40 states have (on average 2.5) internal successors, (100), 41 states have internal predecessors, (100), 9 states have call successors, (12), 5 states have call predecessors, (12), 8 states have return successors, (10), 7 states have call predecessors, (10), 9 states have call successors, (10) [2022-01-31 08:37:44,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:37:44,983 INFO L93 Difference]: Finished difference Result 259 states and 383 transitions. [2022-01-31 08:37:44,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 08:37:44,984 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 40 states have (on average 2.5) internal successors, (100), 41 states have internal predecessors, (100), 9 states have call successors, (12), 5 states have call predecessors, (12), 8 states have return successors, (10), 7 states have call predecessors, (10), 9 states have call successors, (10) Word has length 52 [2022-01-31 08:37:44,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:37:44,986 INFO L225 Difference]: With dead ends: 259 [2022-01-31 08:37:44,986 INFO L226 Difference]: Without dead ends: 259 [2022-01-31 08:37:44,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3650 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2049, Invalid=10832, Unknown=1, NotChecked=0, Total=12882 [2022-01-31 08:37:44,990 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 464 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 448 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 08:37:44,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 186 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 1198 Invalid, 0 Unknown, 448 Unchecked, 0.8s Time] [2022-01-31 08:37:44,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-01-31 08:37:45,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 167. [2022-01-31 08:37:45,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 142 states have (on average 1.3169014084507042) internal successors, (187), 145 states have internal predecessors, (187), 15 states have call successors, (15), 7 states have call predecessors, (15), 9 states have return successors, (56), 14 states have call predecessors, (56), 14 states have call successors, (56) [2022-01-31 08:37:45,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 258 transitions. [2022-01-31 08:37:45,019 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 258 transitions. Word has length 52 [2022-01-31 08:37:45,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:37:45,019 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 258 transitions. [2022-01-31 08:37:45,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 40 states have (on average 2.5) internal successors, (100), 41 states have internal predecessors, (100), 9 states have call successors, (12), 5 states have call predecessors, (12), 8 states have return successors, (10), 7 states have call predecessors, (10), 9 states have call successors, (10) [2022-01-31 08:37:45,019 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 258 transitions. [2022-01-31 08:37:45,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 08:37:45,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:37:45,022 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 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] [2022-01-31 08:37:45,045 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 08:37:45,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:37:45,234 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:37:45,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:37:45,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1372602582, now seen corresponding path program 2 times [2022-01-31 08:37:45,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:37:45,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670371100] [2022-01-31 08:37:45,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:37:45,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:37:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:45,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:37:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:45,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:37:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:45,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 08:37:45,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:45,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 08:37:45,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:45,489 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 08:37:45,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:37:45,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670371100] [2022-01-31 08:37:45,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670371100] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:37:45,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947895235] [2022-01-31 08:37:45,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:37:45,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:37:45,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:37:45,491 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 08:37:45,492 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 08:37:45,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:37:45,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:37:45,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-31 08:37:45,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:37:45,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:37:45,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 28 [2022-01-31 08:37:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 08:37:45,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:37:46,072 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 36 treesize of output 30 [2022-01-31 08:37:46,075 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 40 treesize of output 32 [2022-01-31 08:37:46,147 INFO L353 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-01-31 08:37:46,148 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 39 treesize of output 32 [2022-01-31 08:37:46,211 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 65 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-31 08:37:46,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947895235] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:37:46,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:37:46,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 25 [2022-01-31 08:37:46,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874347900] [2022-01-31 08:37:46,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:37:46,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 08:37:46,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:37:46,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 08:37:46,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-01-31 08:37:46,212 INFO L87 Difference]: Start difference. First operand 167 states and 258 transitions. Second operand has 25 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 5 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-01-31 08:37:46,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:37:46,989 INFO L93 Difference]: Finished difference Result 268 states and 399 transitions. [2022-01-31 08:37:46,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 08:37:46,991 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 5 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 52 [2022-01-31 08:37:46,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:37:46,993 INFO L225 Difference]: With dead ends: 268 [2022-01-31 08:37:46,993 INFO L226 Difference]: Without dead ends: 238 [2022-01-31 08:37:46,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 101 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=303, Invalid=1677, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 08:37:46,994 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 76 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:37:46,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 258 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 595 Invalid, 0 Unknown, 229 Unchecked, 0.3s Time] [2022-01-31 08:37:46,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-01-31 08:37:47,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 208. [2022-01-31 08:37:47,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 178 states have (on average 1.3202247191011236) internal successors, (235), 182 states have internal predecessors, (235), 16 states have call successors, (16), 10 states have call predecessors, (16), 13 states have return successors, (73), 15 states have call predecessors, (73), 15 states have call successors, (73) [2022-01-31 08:37:47,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 324 transitions. [2022-01-31 08:37:47,006 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 324 transitions. Word has length 52 [2022-01-31 08:37:47,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:37:47,006 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 324 transitions. [2022-01-31 08:37:47,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 5 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-01-31 08:37:47,007 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 324 transitions. [2022-01-31 08:37:47,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 08:37:47,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:37:47,009 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 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 08:37:47,025 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 08:37:47,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:37:47,220 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:37:47,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:37:47,220 INFO L85 PathProgramCache]: Analyzing trace with hash -679500885, now seen corresponding path program 3 times [2022-01-31 08:37:47,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:37:47,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664201270] [2022-01-31 08:37:47,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:37:47,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:37:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:47,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:37:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:47,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:37:47,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:47,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 08:37:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:47,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 08:37:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 17 proven. 58 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 08:37:47,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:37:47,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664201270] [2022-01-31 08:37:47,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664201270] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:37:47,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956920128] [2022-01-31 08:37:47,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:37:47,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:37:47,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:37:47,653 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 08:37:47,654 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 08:37:47,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-31 08:37:47,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:37:47,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-31 08:37:47,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:37:47,801 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 6 treesize of output 5 [2022-01-31 08:37:47,995 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 18 treesize of output 10 [2022-01-31 08:37:48,052 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 20 treesize of output 16 [2022-01-31 08:37:48,467 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 08:37:48,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:37:48,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956920128] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:37:48,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 08:37:48,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 35 [2022-01-31 08:37:48,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389983406] [2022-01-31 08:37:48,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 08:37:48,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 08:37:48,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:37:48,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 08:37:48,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1103, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 08:37:48,544 INFO L87 Difference]: Start difference. First operand 208 states and 324 transitions. Second operand has 35 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 31 states have internal predecessors, (77), 5 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 08:37:50,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:37:50,373 INFO L93 Difference]: Finished difference Result 330 states and 496 transitions. [2022-01-31 08:37:50,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 08:37:50,375 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 31 states have internal predecessors, (77), 5 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 52 [2022-01-31 08:37:50,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:37:50,377 INFO L225 Difference]: With dead ends: 330 [2022-01-31 08:37:50,377 INFO L226 Difference]: Without dead ends: 327 [2022-01-31 08:37:50,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2329 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=889, Invalid=6083, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 08:37:50,378 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 121 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 08:37:50,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 289 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 726 Invalid, 0 Unknown, 352 Unchecked, 0.5s Time] [2022-01-31 08:37:50,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-01-31 08:37:50,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 254. [2022-01-31 08:37:50,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 219 states have (on average 1.2968036529680365) internal successors, (284), 225 states have internal predecessors, (284), 17 states have call successors, (17), 12 states have call predecessors, (17), 17 states have return successors, (94), 16 states have call predecessors, (94), 16 states have call successors, (94) [2022-01-31 08:37:50,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 395 transitions. [2022-01-31 08:37:50,394 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 395 transitions. Word has length 52 [2022-01-31 08:37:50,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:37:50,394 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 395 transitions. [2022-01-31 08:37:50,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 31 states have internal predecessors, (77), 5 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 08:37:50,395 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 395 transitions. [2022-01-31 08:37:50,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 08:37:50,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:37:50,396 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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 08:37:50,417 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 08:37:50,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:37:50,613 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:37:50,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:37:50,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1808011948, now seen corresponding path program 4 times [2022-01-31 08:37:50,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:37:50,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810024030] [2022-01-31 08:37:50,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:37:50,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:37:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:50,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:37:50,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:50,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:37:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:50,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 08:37:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:50,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 08:37:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:50,777 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-31 08:37:50,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:37:50,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810024030] [2022-01-31 08:37:50,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810024030] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:37:50,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787021561] [2022-01-31 08:37:50,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:37:50,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:37:50,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:37:50,779 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 08:37:50,780 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 08:37:50,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:37:50,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:37:50,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-31 08:37:50,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:37:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-31 08:37:51,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:37:51,442 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-31 08:37:51,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787021561] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:37:51,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:37:51,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-01-31 08:37:51,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817662755] [2022-01-31 08:37:51,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:37:51,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 08:37:51,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:37:51,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 08:37:51,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-01-31 08:37:51,444 INFO L87 Difference]: Start difference. First operand 254 states and 395 transitions. Second operand has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 13 states have internal predecessors, (44), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 08:37:51,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:37:51,722 INFO L93 Difference]: Finished difference Result 400 states and 753 transitions. [2022-01-31 08:37:51,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 08:37:51,722 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 13 states have internal predecessors, (44), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2022-01-31 08:37:51,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:37:51,725 INFO L225 Difference]: With dead ends: 400 [2022-01-31 08:37:51,725 INFO L226 Difference]: Without dead ends: 398 [2022-01-31 08:37:51,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 100 SyntacticMatches, 12 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-01-31 08:37:51,726 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 37 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:37:51,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 361 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:37:51,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-01-31 08:37:51,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 336. [2022-01-31 08:37:51,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 291 states have (on average 1.3333333333333333) internal successors, (388), 301 states have internal predecessors, (388), 23 states have call successors, (23), 12 states have call predecessors, (23), 21 states have return successors, (157), 22 states have call predecessors, (157), 22 states have call successors, (157) [2022-01-31 08:37:51,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 568 transitions. [2022-01-31 08:37:51,754 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 568 transitions. Word has length 52 [2022-01-31 08:37:51,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:37:51,754 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 568 transitions. [2022-01-31 08:37:51,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 13 states have internal predecessors, (44), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 08:37:51,755 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 568 transitions. [2022-01-31 08:37:51,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 08:37:51,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:37:51,757 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 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 08:37:51,774 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 08:37:51,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:37:51,966 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:37:51,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:37:51,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1937094667, now seen corresponding path program 5 times [2022-01-31 08:37:51,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:37:51,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258057714] [2022-01-31 08:37:51,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:37:51,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:37:51,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:52,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:37:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:52,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:37:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:52,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 08:37:52,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:52,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 08:37:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:52,483 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 51 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 08:37:52,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:37:52,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258057714] [2022-01-31 08:37:52,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258057714] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:37:52,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971532002] [2022-01-31 08:37:52,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:37:52,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:37:52,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:37:52,485 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 08:37:52,486 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 08:37:52,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-31 08:37:52,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:37:52,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-31 08:37:52,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:37:52,777 INFO L353 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-01-31 08:37:52,778 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 22 [2022-01-31 08:37:52,835 INFO L353 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2022-01-31 08:37:52,835 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 39 treesize of output 43 [2022-01-31 08:37:53,033 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 52 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 08:37:53,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:37:53,289 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 39 treesize of output 33 [2022-01-31 08:37:53,291 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 44 treesize of output 36 [2022-01-31 08:37:53,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:37:53,409 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 41 treesize of output 43 [2022-01-31 08:37:53,421 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 34 treesize of output 30 [2022-01-31 08:37:53,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:37:53,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 51 treesize of output 55 [2022-01-31 08:37:53,559 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 43 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 08:37:53,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971532002] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:37:53,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:37:53,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 14] total 45 [2022-01-31 08:37:53,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519814575] [2022-01-31 08:37:53,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:37:53,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 08:37:53,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:37:53,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 08:37:53,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1764, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 08:37:53,562 INFO L87 Difference]: Start difference. First operand 336 states and 568 transitions. Second operand has 45 states, 43 states have (on average 2.395348837209302) internal successors, (103), 41 states have internal predecessors, (103), 7 states have call successors, (12), 4 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-01-31 08:37:55,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:37:55,370 INFO L93 Difference]: Finished difference Result 472 states and 777 transitions. [2022-01-31 08:37:55,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 08:37:55,370 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 2.395348837209302) internal successors, (103), 41 states have internal predecessors, (103), 7 states have call successors, (12), 4 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 52 [2022-01-31 08:37:55,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:37:55,373 INFO L225 Difference]: With dead ends: 472 [2022-01-31 08:37:55,373 INFO L226 Difference]: Without dead ends: 447 [2022-01-31 08:37:55,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 102 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=895, Invalid=5911, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 08:37:55,375 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 201 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 1454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 411 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 08:37:55,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 191 Invalid, 1454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 920 Invalid, 0 Unknown, 411 Unchecked, 0.5s Time] [2022-01-31 08:37:55,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-01-31 08:37:55,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 397. [2022-01-31 08:37:55,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 346 states have (on average 1.3208092485549132) internal successors, (457), 353 states have internal predecessors, (457), 29 states have call successors, (29), 15 states have call predecessors, (29), 21 states have return successors, (188), 28 states have call predecessors, (188), 28 states have call successors, (188) [2022-01-31 08:37:55,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 674 transitions. [2022-01-31 08:37:55,389 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 674 transitions. Word has length 52 [2022-01-31 08:37:55,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:37:55,389 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 674 transitions. [2022-01-31 08:37:55,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 2.395348837209302) internal successors, (103), 41 states have internal predecessors, (103), 7 states have call successors, (12), 4 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-01-31 08:37:55,390 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 674 transitions. [2022-01-31 08:37:55,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 08:37:55,391 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:37:55,391 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 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] [2022-01-31 08:37:55,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-31 08:37:55,605 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,SelfDestructingSolverStorable9 [2022-01-31 08:37:55,605 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:37:55,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:37:55,606 INFO L85 PathProgramCache]: Analyzing trace with hash -325845752, now seen corresponding path program 6 times [2022-01-31 08:37:55,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:37:55,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115844893] [2022-01-31 08:37:55,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:37:55,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:37:55,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:55,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:37:55,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:55,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:37:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:55,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 08:37:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:55,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 08:37:56,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:56,098 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 22 proven. 49 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 08:37:56,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:37:56,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115844893] [2022-01-31 08:37:56,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115844893] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:37:56,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028742176] [2022-01-31 08:37:56,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 08:37:56,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:37:56,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:37:56,100 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 08:37:56,101 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 08:37:56,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-31 08:37:56,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:37:56,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-31 08:37:56,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:37:56,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:37:56,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-31 08:37:56,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:37:56,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2022-01-31 08:37:56,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:37:56,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:37:56,586 INFO L353 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2022-01-31 08:37:56,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 44 [2022-01-31 08:37:56,782 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 1 proven. 69 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 08:37:56,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:37:58,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028742176] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:37:58,055 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 08:37:58,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2022-01-31 08:37:58,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351975252] [2022-01-31 08:37:58,055 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 08:37:58,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 08:37:58,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:37:58,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 08:37:58,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1446, Unknown=2, NotChecked=0, Total=1640 [2022-01-31 08:37:58,056 INFO L87 Difference]: Start difference. First operand 397 states and 674 transitions. Second operand has 35 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 7 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 08:37:59,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:37:59,335 INFO L93 Difference]: Finished difference Result 977 states and 1528 transitions. [2022-01-31 08:37:59,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 08:37:59,335 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 7 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 52 [2022-01-31 08:37:59,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:37:59,339 INFO L225 Difference]: With dead ends: 977 [2022-01-31 08:37:59,339 INFO L226 Difference]: Without dead ends: 817 [2022-01-31 08:37:59,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1717 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=612, Invalid=4788, Unknown=2, NotChecked=0, Total=5402 [2022-01-31 08:37:59,341 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 134 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 392 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 08:37:59,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 205 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 603 Invalid, 0 Unknown, 392 Unchecked, 0.4s Time] [2022-01-31 08:37:59,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-01-31 08:37:59,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 696. [2022-01-31 08:37:59,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 611 states have (on average 1.3175122749590835) internal successors, (805), 627 states have internal predecessors, (805), 45 states have call successors, (45), 23 states have call predecessors, (45), 39 states have return successors, (267), 45 states have call predecessors, (267), 44 states have call successors, (267) [2022-01-31 08:37:59,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1117 transitions. [2022-01-31 08:37:59,364 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1117 transitions. Word has length 52 [2022-01-31 08:37:59,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:37:59,364 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 1117 transitions. [2022-01-31 08:37:59,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 7 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 08:37:59,364 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1117 transitions. [2022-01-31 08:37:59,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 08:37:59,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:37:59,366 INFO L514 BasicCegarLoop]: trace histogram [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 08:37:59,387 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 08:37:59,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:37:59,579 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:37:59,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:37:59,580 INFO L85 PathProgramCache]: Analyzing trace with hash 2092187721, now seen corresponding path program 1 times [2022-01-31 08:37:59,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:37:59,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569581282] [2022-01-31 08:37:59,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:37:59,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:37:59,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:59,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:37:59,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:59,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:37:59,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:59,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 08:37:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:59,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 08:37:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:37:59,806 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 08:37:59,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:37:59,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569581282] [2022-01-31 08:37:59,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569581282] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:37:59,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071628855] [2022-01-31 08:37:59,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:37:59,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:37:59,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:37:59,808 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 08:37:59,811 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 08:38:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:00,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-31 08:38:00,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 08:38:00,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:38:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 08:38:00,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071628855] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:38:00,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:38:00,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-01-31 08:38:00,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620984184] [2022-01-31 08:38:00,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:38:00,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 08:38:00,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:00,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 08:38:00,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-01-31 08:38:00,679 INFO L87 Difference]: Start difference. First operand 696 states and 1117 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 08:38:01,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:01,038 INFO L93 Difference]: Finished difference Result 969 states and 1748 transitions. [2022-01-31 08:38:01,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 08:38:01,038 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2022-01-31 08:38:01,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:01,043 INFO L225 Difference]: With dead ends: 969 [2022-01-31 08:38:01,043 INFO L226 Difference]: Without dead ends: 967 [2022-01-31 08:38:01,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 98 SyntacticMatches, 14 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-01-31 08:38:01,043 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 30 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:01,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 413 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 08:38:01,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-01-31 08:38:01,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 837. [2022-01-31 08:38:01,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 740 states have (on average 1.3472972972972972) internal successors, (997), 761 states have internal predecessors, (997), 50 states have call successors, (50), 23 states have call predecessors, (50), 46 states have return successors, (350), 52 states have call predecessors, (350), 49 states have call successors, (350) [2022-01-31 08:38:01,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1397 transitions. [2022-01-31 08:38:01,081 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1397 transitions. Word has length 52 [2022-01-31 08:38:01,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:01,081 INFO L470 AbstractCegarLoop]: Abstraction has 837 states and 1397 transitions. [2022-01-31 08:38:01,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 08:38:01,082 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1397 transitions. [2022-01-31 08:38:01,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 08:38:01,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:01,085 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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 08:38:01,107 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 08:38:01,291 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,SelfDestructingSolverStorable11 [2022-01-31 08:38:01,291 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:01,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:01,292 INFO L85 PathProgramCache]: Analyzing trace with hash 649478124, now seen corresponding path program 3 times [2022-01-31 08:38:01,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:01,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137864047] [2022-01-31 08:38:01,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:01,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:01,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:01,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:38:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:01,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 08:38:01,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:01,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 08:38:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 32 proven. 59 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 08:38:01,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:01,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137864047] [2022-01-31 08:38:01,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137864047] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:01,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240947915] [2022-01-31 08:38:01,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:38:01,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:01,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:01,374 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 08:38:01,375 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 08:38:01,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 08:38:01,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:38:01,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 08:38:01,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 68 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 08:38:01,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:38:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 66 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-31 08:38:01,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240947915] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:38:01,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:38:01,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 23 [2022-01-31 08:38:01,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966806794] [2022-01-31 08:38:01,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:38:01,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 08:38:01,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:01,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 08:38:01,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-31 08:38:01,744 INFO L87 Difference]: Start difference. First operand 837 states and 1397 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-31 08:38:02,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:02,073 INFO L93 Difference]: Finished difference Result 564 states and 856 transitions. [2022-01-31 08:38:02,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 08:38:02,074 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2022-01-31 08:38:02,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:02,076 INFO L225 Difference]: With dead ends: 564 [2022-01-31 08:38:02,076 INFO L226 Difference]: Without dead ends: 490 [2022-01-31 08:38:02,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=266, Invalid=1294, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 08:38:02,078 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 143 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:02,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 157 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:38:02,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-01-31 08:38:02,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 388. [2022-01-31 08:38:02,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 342 states have (on average 1.3216374269005848) internal successors, (452), 352 states have internal predecessors, (452), 25 states have call successors, (25), 10 states have call predecessors, (25), 20 states have return successors, (149), 25 states have call predecessors, (149), 24 states have call successors, (149) [2022-01-31 08:38:02,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 626 transitions. [2022-01-31 08:38:02,096 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 626 transitions. Word has length 55 [2022-01-31 08:38:02,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:02,096 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 626 transitions. [2022-01-31 08:38:02,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-31 08:38:02,096 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 626 transitions. [2022-01-31 08:38:02,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 08:38:02,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:02,098 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:02,117 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 08:38:02,315 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,SelfDestructingSolverStorable12 [2022-01-31 08:38:02,315 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:02,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:02,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1514099294, now seen corresponding path program 7 times [2022-01-31 08:38:02,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:02,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292904246] [2022-01-31 08:38:02,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:02,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:02,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:02,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:02,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:02,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:38:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:02,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 08:38:02,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:02,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 08:38:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:02,395 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-31 08:38:02,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:02,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292904246] [2022-01-31 08:38:02,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292904246] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:02,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427398897] [2022-01-31 08:38:02,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 08:38:02,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:02,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:02,397 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 08:38:02,399 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 08:38:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:02,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 08:38:02,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:02,541 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 50 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 08:38:02,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:38:02,680 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-31 08:38:02,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427398897] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:38:02,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:38:02,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 13 [2022-01-31 08:38:02,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296463116] [2022-01-31 08:38:02,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:38:02,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 08:38:02,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:02,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 08:38:02,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-01-31 08:38:02,681 INFO L87 Difference]: Start difference. First operand 388 states and 626 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 08:38:02,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:02,803 INFO L93 Difference]: Finished difference Result 405 states and 647 transitions. [2022-01-31 08:38:02,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 08:38:02,803 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 56 [2022-01-31 08:38:02,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:02,805 INFO L225 Difference]: With dead ends: 405 [2022-01-31 08:38:02,805 INFO L226 Difference]: Without dead ends: 383 [2022-01-31 08:38:02,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2022-01-31 08:38:02,806 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 48 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:02,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 70 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:38:02,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-01-31 08:38:02,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 350. [2022-01-31 08:38:02,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 308 states have (on average 1.3376623376623376) internal successors, (412), 318 states have internal predecessors, (412), 23 states have call successors, (23), 8 states have call predecessors, (23), 18 states have return successors, (146), 23 states have call predecessors, (146), 22 states have call successors, (146) [2022-01-31 08:38:02,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 581 transitions. [2022-01-31 08:38:02,817 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 581 transitions. Word has length 56 [2022-01-31 08:38:02,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:02,818 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 581 transitions. [2022-01-31 08:38:02,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 08:38:02,818 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 581 transitions. [2022-01-31 08:38:02,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 08:38:02,819 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:02,819 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:02,839 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 08:38:03,035 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,SelfDestructingSolverStorable13 [2022-01-31 08:38:03,035 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:03,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:03,036 INFO L85 PathProgramCache]: Analyzing trace with hash -2065849772, now seen corresponding path program 4 times [2022-01-31 08:38:03,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:03,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748241502] [2022-01-31 08:38:03,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:03,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:03,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:03,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:38:03,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:03,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:38:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:03,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 08:38:03,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:03,255 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-01-31 08:38:03,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:03,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748241502] [2022-01-31 08:38:03,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748241502] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:03,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937969964] [2022-01-31 08:38:03,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:38:03,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:03,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:03,257 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 08:38:03,258 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 08:38:03,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:38:03,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:38:03,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-31 08:38:03,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-01-31 08:38:03,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:38:04,130 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-01-31 08:38:04,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937969964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:38:04,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:38:04,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 20 [2022-01-31 08:38:04,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020930722] [2022-01-31 08:38:04,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:38:04,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 08:38:04,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:04,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 08:38:04,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2022-01-31 08:38:04,132 INFO L87 Difference]: Start difference. First operand 350 states and 581 transitions. Second operand has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 15 states have internal predecessors, (41), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 08:38:04,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:04,547 INFO L93 Difference]: Finished difference Result 492 states and 981 transitions. [2022-01-31 08:38:04,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 08:38:04,548 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 15 states have internal predecessors, (41), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 63 [2022-01-31 08:38:04,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:04,550 INFO L225 Difference]: With dead ends: 492 [2022-01-31 08:38:04,550 INFO L226 Difference]: Without dead ends: 490 [2022-01-31 08:38:04,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 121 SyntacticMatches, 14 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-01-31 08:38:04,551 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 48 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:04,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 375 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 08:38:04,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-01-31 08:38:04,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 407. [2022-01-31 08:38:04,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 359 states have (on average 1.350974930362117) internal successors, (485), 372 states have internal predecessors, (485), 26 states have call successors, (26), 8 states have call predecessors, (26), 21 states have return successors, (210), 26 states have call predecessors, (210), 25 states have call successors, (210) [2022-01-31 08:38:04,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 721 transitions. [2022-01-31 08:38:04,580 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 721 transitions. Word has length 63 [2022-01-31 08:38:04,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:04,580 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 721 transitions. [2022-01-31 08:38:04,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 15 states have internal predecessors, (41), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 08:38:04,580 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 721 transitions. [2022-01-31 08:38:04,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 08:38:04,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:04,583 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:04,602 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 08:38:04,799 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,SelfDestructingSolverStorable14 [2022-01-31 08:38:04,799 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:04,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:04,800 INFO L85 PathProgramCache]: Analyzing trace with hash 421663061, now seen corresponding path program 8 times [2022-01-31 08:38:04,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:04,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983463404] [2022-01-31 08:38:04,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:04,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:04,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:04,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:04,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:38:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:05,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:38:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:05,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 08:38:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 37 proven. 98 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-31 08:38:05,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:05,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983463404] [2022-01-31 08:38:05,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983463404] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:05,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737049217] [2022-01-31 08:38:05,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:38:05,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:05,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:05,219 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 08:38:05,219 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 08:38:05,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:38:05,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:38:05,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-31 08:38:05,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:05,566 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 08:38:05,611 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 26 treesize of output 22 [2022-01-31 08:38:05,895 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 14 proven. 129 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-31 08:38:05,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:38:06,136 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 19 treesize of output 17 [2022-01-31 08:38:06,138 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 38 treesize of output 34 [2022-01-31 08:38:06,237 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 10 treesize of output 6 [2022-01-31 08:38:06,385 INFO L353 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-01-31 08:38:06,385 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 08:38:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 7 proven. 133 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 08:38:06,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737049217] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:38:06,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:38:06,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 19] total 51 [2022-01-31 08:38:06,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322174408] [2022-01-31 08:38:06,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:38:06,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 08:38:06,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:06,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 08:38:06,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2321, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 08:38:06,580 INFO L87 Difference]: Start difference. First operand 407 states and 721 transitions. Second operand has 51 states, 47 states have (on average 2.4468085106382977) internal successors, (115), 47 states have internal predecessors, (115), 8 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 08:38:11,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:11,628 INFO L93 Difference]: Finished difference Result 1233 states and 2191 transitions. [2022-01-31 08:38:11,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 08:38:11,629 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 47 states have (on average 2.4468085106382977) internal successors, (115), 47 states have internal predecessors, (115), 8 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) Word has length 63 [2022-01-31 08:38:11,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:11,634 INFO L225 Difference]: With dead ends: 1233 [2022-01-31 08:38:11,634 INFO L226 Difference]: Without dead ends: 1223 [2022-01-31 08:38:11,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 126 SyntacticMatches, 8 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8850 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2780, Invalid=22660, Unknown=0, NotChecked=0, Total=25440 [2022-01-31 08:38:11,641 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 424 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 1946 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 2977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 659 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:11,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 395 Invalid, 2977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1946 Invalid, 0 Unknown, 659 Unchecked, 1.2s Time] [2022-01-31 08:38:11,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2022-01-31 08:38:11,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 825. [2022-01-31 08:38:11,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 735 states have (on average 1.34421768707483) internal successors, (988), 763 states have internal predecessors, (988), 41 states have call successors, (41), 20 states have call predecessors, (41), 48 states have return successors, (434), 41 states have call predecessors, (434), 40 states have call successors, (434) [2022-01-31 08:38:11,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1463 transitions. [2022-01-31 08:38:11,690 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1463 transitions. Word has length 63 [2022-01-31 08:38:11,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:11,691 INFO L470 AbstractCegarLoop]: Abstraction has 825 states and 1463 transitions. [2022-01-31 08:38:11,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 47 states have (on average 2.4468085106382977) internal successors, (115), 47 states have internal predecessors, (115), 8 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 08:38:11,691 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1463 transitions. [2022-01-31 08:38:11,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 08:38:11,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:11,696 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:11,723 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 08:38:11,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:11,913 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:11,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:11,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1936767053, now seen corresponding path program 9 times [2022-01-31 08:38:11,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:11,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338419905] [2022-01-31 08:38:11,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:11,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:12,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:12,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:38:12,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:12,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:38:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:12,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 08:38:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:12,493 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 43 proven. 96 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 08:38:12,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:12,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338419905] [2022-01-31 08:38:12,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338419905] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:12,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932212723] [2022-01-31 08:38:12,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:38:12,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:12,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:12,495 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 08:38:12,496 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 08:38:12,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-31 08:38:12,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:38:12,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-31 08:38:12,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:12,806 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 08:38:12,806 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 08:38:12,859 INFO L353 Elim1Store]: treesize reduction 92, result has 20.7 percent of original size [2022-01-31 08:38:12,860 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 38 treesize of output 40 [2022-01-31 08:38:12,986 INFO L353 Elim1Store]: treesize reduction 159, result has 7.6 percent of original size [2022-01-31 08:38:12,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 33 [2022-01-31 08:38:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 86 proven. 55 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 08:38:13,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:38:14,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:38:14,332 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 29 treesize of output 33 [2022-01-31 08:38:14,353 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 [2022-01-31 08:38:14,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:38:14,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 44 treesize of output 48 [2022-01-31 08:38:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 74 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 08:38:14,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932212723] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:38:14,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:38:14,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 60 [2022-01-31 08:38:14,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451541559] [2022-01-31 08:38:14,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:38:14,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 08:38:14,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:14,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 08:38:14,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=3225, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 08:38:14,585 INFO L87 Difference]: Start difference. First operand 825 states and 1463 transitions. Second operand has 60 states, 57 states have (on average 1.9473684210526316) internal successors, (111), 56 states have internal predecessors, (111), 6 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2022-01-31 08:38:24,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:24,368 INFO L93 Difference]: Finished difference Result 2013 states and 4063 transitions. [2022-01-31 08:38:24,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 08:38:24,369 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 57 states have (on average 1.9473684210526316) internal successors, (111), 56 states have internal predecessors, (111), 6 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 63 [2022-01-31 08:38:24,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:24,380 INFO L225 Difference]: With dead ends: 2013 [2022-01-31 08:38:24,380 INFO L226 Difference]: Without dead ends: 1906 [2022-01-31 08:38:24,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 103 SyntacticMatches, 6 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5740 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=1752, Invalid=15016, Unknown=2, NotChecked=0, Total=16770 [2022-01-31 08:38:24,382 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 91 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 506 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:24,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 496 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 625 Invalid, 0 Unknown, 506 Unchecked, 0.3s Time] [2022-01-31 08:38:24,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2022-01-31 08:38:24,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1768. [2022-01-31 08:38:24,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1585 states have (on average 1.298422712933754) internal successors, (2058), 1638 states have internal predecessors, (2058), 107 states have call successors, (107), 35 states have call predecessors, (107), 75 states have return successors, (1496), 94 states have call predecessors, (1496), 106 states have call successors, (1496) [2022-01-31 08:38:24,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 3661 transitions. [2022-01-31 08:38:24,528 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 3661 transitions. Word has length 63 [2022-01-31 08:38:24,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:24,528 INFO L470 AbstractCegarLoop]: Abstraction has 1768 states and 3661 transitions. [2022-01-31 08:38:24,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 57 states have (on average 1.9473684210526316) internal successors, (111), 56 states have internal predecessors, (111), 6 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2022-01-31 08:38:24,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 3661 transitions. [2022-01-31 08:38:24,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 08:38:24,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:24,538 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:24,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-31 08:38:24,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-31 08:38:24,751 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:24,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:24,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1715049835, now seen corresponding path program 10 times [2022-01-31 08:38:24,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:24,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720665417] [2022-01-31 08:38:24,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:24,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:24,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:24,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:38:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:24,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:38:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:25,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 08:38:25,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:25,071 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 123 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-31 08:38:25,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:25,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720665417] [2022-01-31 08:38:25,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720665417] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:25,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802111058] [2022-01-31 08:38:25,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:38:25,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:25,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:25,073 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:38:25,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-31 08:38:25,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:38:25,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:38:25,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 56 conjunts are in the unsatisfiable core [2022-01-31 08:38:25,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:25,509 INFO L353 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-01-31 08:38:25,510 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 28 treesize of output 33 [2022-01-31 08:38:25,624 INFO L353 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2022-01-31 08:38:25,624 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 54 treesize of output 50 [2022-01-31 08:38:25,789 INFO L353 Elim1Store]: treesize reduction 175, result has 7.9 percent of original size [2022-01-31 08:38:25,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 43 [2022-01-31 08:38:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 24 proven. 129 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:38:37,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:38:42,927 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_356 Int) (main_~i~1 Int) (v_ArrVal_351 Int) (v_main_~i~1_45 Int)) (or (not (= (mod (select (store (let ((.cse0 (store (select |c_#memory_int| |c_main_~#x~0.base|) (+ |c_main_~#x~0.offset| (* main_~i~1 4)) v_ArrVal_351)) (.cse1 (* v_main_~i~1_45 4))) (store .cse0 (+ .cse1 |c_main_~#x~0.offset|) (select .cse0 (+ .cse1 |c_main_~#x~0.offset| 4)))) (+ |c_main_~#x~0.offset| (* c_~N~0 4) (- 4)) v_ArrVal_356) (+ |c_main_~#x~0.offset| 4)) 2) 0)) (not (< (+ v_main_~i~1_45 1) c_~N~0)) (< (+ v_main_~i~1_45 2) c_~N~0) (not (<= (+ main_~i~1 1) v_main_~i~1_45)))) is different from false [2022-01-31 08:38:42,994 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 62 treesize of output 56 [2022-01-31 08:38:43,011 INFO L353 Elim1Store]: treesize reduction 27, result has 37.2 percent of original size [2022-01-31 08:38:43,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 624 treesize of output 599 [2022-01-31 08:38:43,399 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:38:43,400 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 64 treesize of output 66 [2022-01-31 08:38:43,413 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 11 treesize of output 5 [2022-01-31 08:38:43,447 INFO L353 Elim1Store]: treesize reduction 15, result has 68.1 percent of original size [2022-01-31 08:38:43,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 626 treesize of output 615 [2022-01-31 08:38:43,984 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 8 proven. 139 refuted. 0 times theorem prover too weak. 5 trivial. 2 not checked. [2022-01-31 08:38:43,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802111058] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:38:43,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:38:43,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 26, 24] total 59 [2022-01-31 08:38:43,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676929322] [2022-01-31 08:38:43,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:38:43,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 08:38:43,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:43,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 08:38:43,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=3033, Unknown=7, NotChecked=112, Total=3422 [2022-01-31 08:38:43,986 INFO L87 Difference]: Start difference. First operand 1768 states and 3661 transitions. Second operand has 59 states, 56 states have (on average 2.3392857142857144) internal successors, (131), 57 states have internal predecessors, (131), 7 states have call successors, (11), 4 states have call predecessors, (11), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-31 08:38:55,951 WARN L228 SmtUtils]: Spent 5.14s on a formula simplification. DAG size of input: 94 DAG size of output: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 08:40:10,838 WARN L228 SmtUtils]: Spent 10.16s on a formula simplification. DAG size of input: 108 DAG size of output: 83 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 08:40:22,597 WARN L228 SmtUtils]: Spent 9.63s on a formula simplification. DAG size of input: 105 DAG size of output: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 08:40:51,560 WARN L228 SmtUtils]: Spent 18.06s on a formula simplification. DAG size of input: 116 DAG size of output: 87 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 08:41:11,126 WARN L228 SmtUtils]: Spent 9.88s on a formula simplification. DAG size of input: 109 DAG size of output: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 08:41:32,055 WARN L228 SmtUtils]: Spent 9.66s on a formula simplification. DAG size of input: 93 DAG size of output: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 08:41:39,068 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse9 (* c_~N~0 4))) (let ((.cse10 (+ .cse9 (- 4)))) (let ((.cse4 (<= 1 |c_sep_#in~x.offset|)) (.cse0 (< 2 c_~N~0)) (.cse5 (<= c_~N~0 3)) (.cse3 (<= (+ |c_sep_#in~x.offset| 13) .cse9)) (.cse2 (select (select |c_#memory_int| |c_sep_#in~x.base|) .cse10)) (.cse1 (= |c_sep_#in~x.base| c_sep_~x.base))) (and (= c_~N~0 |c_old(~N~0)|) (= |c_#NULL.base| |c_old(#NULL.base)|) .cse0 (<= 2 c_sep_~i~0) .cse1 (= |c_sep_#in~x.offset| c_sep_~x.offset) (or (= .cse2 |c_sep_#t~mem2|) .cse3 .cse4) (<= 3 c_~N~0) (or .cse3 (<= 0 (+ .cse2 (* 2 (div (* (- 1) .cse2) 2)))) .cse4) .cse5 (or (not .cse0) (not .cse5) (forall ((v_ArrVal_356 Int) (main_~i~1 Int) (v_ArrVal_351 Int) (v_main_~i~1_45 Int)) (or (not (< (+ v_main_~i~1_45 1) c_~N~0)) (< (+ v_main_~i~1_45 2) c_~N~0) (not (= (mod (select (store (let ((.cse6 (store (select |c_#memory_int| |c_sep_#in~x.base|) (+ |c_sep_#in~x.offset| (* main_~i~1 4)) v_ArrVal_351)) (.cse7 (* v_main_~i~1_45 4))) (store .cse6 (+ |c_sep_#in~x.offset| .cse7) (select .cse6 (+ |c_sep_#in~x.offset| .cse7 4)))) (+ |c_sep_#in~x.offset| (* c_~N~0 4) (- 4)) v_ArrVal_356) (+ |c_sep_#in~x.offset| 4)) 2) 0)) (not (<= (+ main_~i~1 1) v_main_~i~1_45))))) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (<= 1 c_sep_~i~0) (or .cse3 (let ((.cse8 (+ .cse2 1))) (<= .cse8 (* 2 (div .cse8 2)))) (<= .cse9 (+ |c_sep_#in~x.offset| 11))) (or .cse1 (not (= (+ (* c_sep_~i~0 4) c_sep_~x.offset) .cse10))))))) is different from false [2022-01-31 08:41:45,947 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse7 (* c_~N~0 4))) (let ((.cse0 (< 2 c_~N~0)) (.cse3 (<= c_~N~0 3)) (.cse1 (<= (+ |c_sep_#in~x.offset| 13) .cse7)) (.cse2 (select (select |c_#memory_int| |c_sep_#in~x.base|) (+ .cse7 (- 4))))) (and .cse0 (<= 3 c_~N~0) (or .cse1 (<= 0 (+ .cse2 (* 2 (div (* (- 1) .cse2) 2)))) (<= 1 |c_sep_#in~x.offset|)) .cse3 (or (not .cse0) (not .cse3) (forall ((v_ArrVal_356 Int) (main_~i~1 Int) (v_ArrVal_351 Int) (v_main_~i~1_45 Int)) (or (not (< (+ v_main_~i~1_45 1) c_~N~0)) (< (+ v_main_~i~1_45 2) c_~N~0) (not (= (mod (select (store (let ((.cse4 (store (select |c_#memory_int| |c_sep_#in~x.base|) (+ |c_sep_#in~x.offset| (* main_~i~1 4)) v_ArrVal_351)) (.cse5 (* v_main_~i~1_45 4))) (store .cse4 (+ |c_sep_#in~x.offset| .cse5) (select .cse4 (+ |c_sep_#in~x.offset| .cse5 4)))) (+ |c_sep_#in~x.offset| (* c_~N~0 4) (- 4)) v_ArrVal_356) (+ |c_sep_#in~x.offset| 4)) 2) 0)) (not (<= (+ main_~i~1 1) v_main_~i~1_45))))) (or .cse1 (let ((.cse6 (+ .cse2 1))) (<= .cse6 (* 2 (div .cse6 2)))) (<= .cse7 (+ |c_sep_#in~x.offset| 11)))))) is different from false [2022-01-31 08:42:02,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:42:02,402 INFO L93 Difference]: Finished difference Result 3399 states and 7496 transitions. [2022-01-31 08:42:02,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 08:42:02,403 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 56 states have (on average 2.3392857142857144) internal successors, (131), 57 states have internal predecessors, (131), 7 states have call successors, (11), 4 states have call predecessors, (11), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) Word has length 63 [2022-01-31 08:42:02,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:42:02,427 INFO L225 Difference]: With dead ends: 3399 [2022-01-31 08:42:02,427 INFO L226 Difference]: Without dead ends: 3357 [2022-01-31 08:42:02,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 102 SyntacticMatches, 10 SemanticMatches, 145 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 6838 ImplicationChecksByTransitivity, 214.6s TimeCoverageRelationStatistics Valid=2199, Invalid=18319, Unknown=86, NotChecked=858, Total=21462 [2022-01-31 08:42:02,429 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 276 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 1716 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 3351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 1716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1281 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:42:02,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 432 Invalid, 3351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 1716 Invalid, 0 Unknown, 1281 Unchecked, 1.2s Time] [2022-01-31 08:42:02,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2022-01-31 08:42:02,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 2570. [2022-01-31 08:42:02,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2570 states, 2299 states have (on average 1.298825576337538) internal successors, (2986), 2387 states have internal predecessors, (2986), 151 states have call successors, (151), 56 states have call predecessors, (151), 119 states have return successors, (2604), 126 states have call predecessors, (2604), 150 states have call successors, (2604) [2022-01-31 08:42:02,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 5741 transitions. [2022-01-31 08:42:02,638 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 5741 transitions. Word has length 63 [2022-01-31 08:42:02,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:42:02,638 INFO L470 AbstractCegarLoop]: Abstraction has 2570 states and 5741 transitions. [2022-01-31 08:42:02,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 56 states have (on average 2.3392857142857144) internal successors, (131), 57 states have internal predecessors, (131), 7 states have call successors, (11), 4 states have call predecessors, (11), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-31 08:42:02,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 5741 transitions. [2022-01-31 08:42:02,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 08:42:02,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:42:02,654 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:42:02,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-31 08:42:02,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-31 08:42:02,872 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:42:02,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:42:02,873 INFO L85 PathProgramCache]: Analyzing trace with hash -94910315, now seen corresponding path program 11 times [2022-01-31 08:42:02,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:42:02,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209723605] [2022-01-31 08:42:02,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:42:02,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:42:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:03,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:42:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:03,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:42:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:03,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:42:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:03,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 08:42:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 43 proven. 96 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 08:42:03,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:42:03,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209723605] [2022-01-31 08:42:03,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209723605] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:42:03,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937422040] [2022-01-31 08:42:03,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:42:03,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:42:03,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:42:03,495 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:42:03,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-31 08:42:03,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-31 08:42:03,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:42:03,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-31 08:42:03,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:42:03,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:42:03,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:42:03,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:42:03,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 34 [2022-01-31 08:42:04,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:42:04,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-01-31 08:42:04,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:42:04,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:42:04,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:42:04,459 INFO L353 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-01-31 08:42:04,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-01-31 08:42:04,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:42:04,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:42:04,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:42:04,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:42:04,569 INFO L353 Elim1Store]: treesize reduction 75, result has 20.2 percent of original size [2022-01-31 08:42:04,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 49 [2022-01-31 08:42:04,874 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 11 proven. 141 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:42:04,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:42:09,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937422040] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:42:09,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 08:42:09,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 41 [2022-01-31 08:42:09,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240356071] [2022-01-31 08:42:09,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 08:42:09,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 08:42:09,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:42:09,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 08:42:09,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2429, Unknown=5, NotChecked=0, Total=2652 [2022-01-31 08:42:09,915 INFO L87 Difference]: Start difference. First operand 2570 states and 5741 transitions. Second operand has 41 states, 39 states have (on average 2.358974358974359) internal successors, (92), 37 states have internal predecessors, (92), 5 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 08:42:12,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:42:12,930 INFO L93 Difference]: Finished difference Result 4414 states and 9359 transitions. [2022-01-31 08:42:12,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 08:42:12,930 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.358974358974359) internal successors, (92), 37 states have internal predecessors, (92), 5 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 63 [2022-01-31 08:42:12,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:42:12,961 INFO L225 Difference]: With dead ends: 4414 [2022-01-31 08:42:12,961 INFO L226 Difference]: Without dead ends: 4378 [2022-01-31 08:42:12,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3653 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=998, Invalid=9917, Unknown=5, NotChecked=0, Total=10920 [2022-01-31 08:42:12,963 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 87 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 2238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1455 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 08:42:12,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 378 Invalid, 2238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 748 Invalid, 0 Unknown, 1455 Unchecked, 0.4s Time] [2022-01-31 08:42:12,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4378 states. [2022-01-31 08:42:13,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4378 to 3972. [2022-01-31 08:42:13,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3972 states, 3567 states have (on average 1.2949257078777685) internal successors, (4619), 3692 states have internal predecessors, (4619), 216 states have call successors, (216), 88 states have call predecessors, (216), 188 states have return successors, (3667), 191 states have call predecessors, (3667), 215 states have call successors, (3667) [2022-01-31 08:42:13,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3972 states to 3972 states and 8502 transitions. [2022-01-31 08:42:13,331 INFO L78 Accepts]: Start accepts. Automaton has 3972 states and 8502 transitions. Word has length 63 [2022-01-31 08:42:13,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:42:13,331 INFO L470 AbstractCegarLoop]: Abstraction has 3972 states and 8502 transitions. [2022-01-31 08:42:13,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.358974358974359) internal successors, (92), 37 states have internal predecessors, (92), 5 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 08:42:13,334 INFO L276 IsEmpty]: Start isEmpty. Operand 3972 states and 8502 transitions. [2022-01-31 08:42:13,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 08:42:13,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:42:13,359 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:42:13,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-31 08:42:13,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:42:13,567 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:42:13,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:42:13,568 INFO L85 PathProgramCache]: Analyzing trace with hash 384972341, now seen corresponding path program 12 times [2022-01-31 08:42:13,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:42:13,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185634422] [2022-01-31 08:42:13,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:42:13,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:42:13,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:13,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:42:13,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:13,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:42:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:13,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:42:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:13,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 08:42:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:13,899 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 5 proven. 97 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-31 08:42:13,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:42:13,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185634422] [2022-01-31 08:42:13,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185634422] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:42:13,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582042760] [2022-01-31 08:42:13,899 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 08:42:13,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:42:13,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:42:13,901 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:42:13,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-31 08:42:14,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-31 08:42:14,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:42:14,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-31 08:42:14,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:42:14,453 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-31 08:42:14,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:42:14,788 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-31 08:42:14,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582042760] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:42:14,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:42:14,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 19 [2022-01-31 08:42:14,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456581879] [2022-01-31 08:42:14,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:42:14,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 08:42:14,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:42:14,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 08:42:14,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-01-31 08:42:14,790 INFO L87 Difference]: Start difference. First operand 3972 states and 8502 transitions. Second operand has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 08:42:15,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:42:15,193 INFO L93 Difference]: Finished difference Result 4805 states and 12544 transitions. [2022-01-31 08:42:15,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 08:42:15,193 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 63 [2022-01-31 08:42:15,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:42:15,234 INFO L225 Difference]: With dead ends: 4805 [2022-01-31 08:42:15,234 INFO L226 Difference]: Without dead ends: 4803 [2022-01-31 08:42:15,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 121 SyntacticMatches, 15 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-01-31 08:42:15,235 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 39 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:42:15,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 314 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 08:42:15,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4803 states. [2022-01-31 08:42:15,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4803 to 4161. [2022-01-31 08:42:15,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4161 states, 3726 states have (on average 1.2922705314009661) internal successors, (4815), 3866 states have internal predecessors, (4815), 233 states have call successors, (233), 88 states have call predecessors, (233), 201 states have return successors, (4451), 206 states have call predecessors, (4451), 232 states have call successors, (4451) [2022-01-31 08:42:15,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4161 states to 4161 states and 9499 transitions. [2022-01-31 08:42:15,811 INFO L78 Accepts]: Start accepts. Automaton has 4161 states and 9499 transitions. Word has length 63 [2022-01-31 08:42:15,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:42:15,811 INFO L470 AbstractCegarLoop]: Abstraction has 4161 states and 9499 transitions. [2022-01-31 08:42:15,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 08:42:15,812 INFO L276 IsEmpty]: Start isEmpty. Operand 4161 states and 9499 transitions. [2022-01-31 08:42:15,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 08:42:15,843 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:42:15,843 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:42:15,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-31 08:42:16,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:42:16,064 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:42:16,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:42:16,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1976624140, now seen corresponding path program 13 times [2022-01-31 08:42:16,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:42:16,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874175175] [2022-01-31 08:42:16,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:42:16,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:42:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:16,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:42:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:16,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:42:16,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:16,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:42:16,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:16,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 08:42:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:16,488 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 37 proven. 94 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-31 08:42:16,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:42:16,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874175175] [2022-01-31 08:42:16,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874175175] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:42:16,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415552057] [2022-01-31 08:42:16,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 08:42:16,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:42:16,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:42:16,489 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:42:16,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-31 08:42:16,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:16,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-31 08:42:16,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:42:16,872 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 27 treesize of output 15 [2022-01-31 08:42:16,918 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 27 treesize of output 23 [2022-01-31 08:42:17,254 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 14 proven. 129 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-31 08:42:17,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:42:17,522 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 20 treesize of output 18 [2022-01-31 08:42:17,524 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 40 treesize of output 36 [2022-01-31 08:42:17,663 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 9 treesize of output 5 [2022-01-31 08:42:17,830 INFO L353 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-01-31 08:42:17,830 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 08:42:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 7 proven. 133 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 08:42:18,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415552057] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:42:18,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:42:18,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 19] total 48 [2022-01-31 08:42:18,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954023459] [2022-01-31 08:42:18,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:42:18,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 08:42:18,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:42:18,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 08:42:18,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2046, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 08:42:18,028 INFO L87 Difference]: Start difference. First operand 4161 states and 9499 transitions. Second operand has 48 states, 44 states have (on average 2.5) internal successors, (110), 44 states have internal predecessors, (110), 8 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 08:42:25,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:42:25,586 INFO L93 Difference]: Finished difference Result 4660 states and 11576 transitions. [2022-01-31 08:42:25,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-01-31 08:42:25,586 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 44 states have (on average 2.5) internal successors, (110), 44 states have internal predecessors, (110), 8 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) Word has length 63 [2022-01-31 08:42:25,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:42:25,619 INFO L225 Difference]: With dead ends: 4660 [2022-01-31 08:42:25,619 INFO L226 Difference]: Without dead ends: 4633 [2022-01-31 08:42:25,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 116 SyntacticMatches, 8 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11975 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=3679, Invalid=29627, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 08:42:25,622 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 281 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 3382 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 4541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 3382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 870 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 08:42:25,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 471 Invalid, 4541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 3382 Invalid, 0 Unknown, 870 Unchecked, 1.9s Time] [2022-01-31 08:42:25,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2022-01-31 08:42:25,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 3889. [2022-01-31 08:42:25,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3889 states, 3486 states have (on average 1.3055077452667814) internal successors, (4551), 3637 states have internal predecessors, (4551), 196 states have call successors, (196), 77 states have call predecessors, (196), 206 states have return successors, (4067), 174 states have call predecessors, (4067), 195 states have call successors, (4067) [2022-01-31 08:42:25,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3889 states to 3889 states and 8814 transitions. [2022-01-31 08:42:25,989 INFO L78 Accepts]: Start accepts. Automaton has 3889 states and 8814 transitions. Word has length 63 [2022-01-31 08:42:25,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:42:25,989 INFO L470 AbstractCegarLoop]: Abstraction has 3889 states and 8814 transitions. [2022-01-31 08:42:25,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 44 states have (on average 2.5) internal successors, (110), 44 states have internal predecessors, (110), 8 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 08:42:25,990 INFO L276 IsEmpty]: Start isEmpty. Operand 3889 states and 8814 transitions. [2022-01-31 08:42:26,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 08:42:26,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:42:26,001 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:42:26,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-31 08:42:26,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:42:26,215 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:42:26,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:42:26,216 INFO L85 PathProgramCache]: Analyzing trace with hash 510888693, now seen corresponding path program 14 times [2022-01-31 08:42:26,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:42:26,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535927525] [2022-01-31 08:42:26,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:42:26,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:42:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:26,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:42:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:26,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:42:26,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:26,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:42:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:26,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 08:42:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:26,550 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 5 proven. 101 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-31 08:42:26,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:42:26,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535927525] [2022-01-31 08:42:26,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535927525] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:42:26,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006080246] [2022-01-31 08:42:26,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:42:26,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:42:26,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:42:26,552 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:42:26,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-31 08:42:26,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:42:26,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:42:26,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-31 08:42:26,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:42:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-31 08:42:26,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:42:27,336 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-31 08:42:27,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006080246] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:42:27,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:42:27,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 21 [2022-01-31 08:42:27,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499951964] [2022-01-31 08:42:27,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:42:27,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 08:42:27,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:42:27,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 08:42:27,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-01-31 08:42:27,337 INFO L87 Difference]: Start difference. First operand 3889 states and 8814 transitions. Second operand has 21 states, 20 states have (on average 2.75) internal successors, (55), 16 states have internal predecessors, (55), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 08:42:27,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:42:27,922 INFO L93 Difference]: Finished difference Result 6165 states and 19549 transitions. [2022-01-31 08:42:27,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 08:42:27,924 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 16 states have internal predecessors, (55), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 63 [2022-01-31 08:42:27,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:42:27,971 INFO L225 Difference]: With dead ends: 6165 [2022-01-31 08:42:27,972 INFO L226 Difference]: Without dead ends: 6163 [2022-01-31 08:42:27,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 119 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-01-31 08:42:27,972 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 42 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 08:42:27,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 416 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 08:42:27,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6163 states. [2022-01-31 08:42:28,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6163 to 4931. [2022-01-31 08:42:28,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4931 states, 4434 states have (on average 1.3299503834009923) internal successors, (5897), 4634 states have internal predecessors, (5897), 245 states have call successors, (245), 77 states have call predecessors, (245), 251 states have return successors, (5492), 219 states have call predecessors, (5492), 244 states have call successors, (5492) [2022-01-31 08:42:28,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4931 states to 4931 states and 11634 transitions. [2022-01-31 08:42:28,999 INFO L78 Accepts]: Start accepts. Automaton has 4931 states and 11634 transitions. Word has length 63 [2022-01-31 08:42:28,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:42:28,999 INFO L470 AbstractCegarLoop]: Abstraction has 4931 states and 11634 transitions. [2022-01-31 08:42:28,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 16 states have internal predecessors, (55), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 08:42:28,999 INFO L276 IsEmpty]: Start isEmpty. Operand 4931 states and 11634 transitions. [2022-01-31 08:42:29,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 08:42:29,015 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:42:29,015 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:42:29,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-31 08:42:29,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-31 08:42:29,233 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:42:29,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:42:29,233 INFO L85 PathProgramCache]: Analyzing trace with hash 639971412, now seen corresponding path program 15 times [2022-01-31 08:42:29,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:42:29,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641191683] [2022-01-31 08:42:29,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:42:29,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:42:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:29,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:42:29,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:29,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:42:29,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:29,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:42:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:29,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 08:42:29,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 43 proven. 96 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 08:42:29,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:42:29,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641191683] [2022-01-31 08:42:29,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641191683] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:42:29,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877092282] [2022-01-31 08:42:29,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:42:29,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:42:29,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:42:29,804 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:42:29,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-31 08:42:30,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-31 08:42:30,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:42:30,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-31 08:42:30,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:42:30,058 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 6 treesize of output 5 [2022-01-31 08:42:30,354 INFO L353 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2022-01-31 08:42:30,355 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 36 [2022-01-31 08:42:30,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:42:30,513 INFO L353 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2022-01-31 08:42:30,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-01-31 08:42:30,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:42:30,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:42:30,808 INFO L353 Elim1Store]: treesize reduction 60, result has 45.9 percent of original size [2022-01-31 08:42:30,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 93 [2022-01-31 08:42:31,807 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 86 proven. 50 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-31 08:42:31,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:42:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 74 proven. 60 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 08:42:33,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877092282] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:42:33,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:42:33,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25, 22] total 64 [2022-01-31 08:42:33,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87155915] [2022-01-31 08:42:33,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:42:33,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 08:42:33,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:42:33,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 08:42:33,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=3688, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 08:42:33,131 INFO L87 Difference]: Start difference. First operand 4931 states and 11634 transitions. Second operand has 64 states, 62 states have (on average 1.8548387096774193) internal successors, (115), 60 states have internal predecessors, (115), 6 states have call successors, (11), 3 states have call predecessors, (11), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-01-31 08:42:39,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:42:39,206 INFO L93 Difference]: Finished difference Result 5902 states and 13574 transitions. [2022-01-31 08:42:39,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 08:42:39,207 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 62 states have (on average 1.8548387096774193) internal successors, (115), 60 states have internal predecessors, (115), 6 states have call successors, (11), 3 states have call predecessors, (11), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 63 [2022-01-31 08:42:39,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:42:39,258 INFO L225 Difference]: With dead ends: 5902 [2022-01-31 08:42:39,258 INFO L226 Difference]: Without dead ends: 5815 [2022-01-31 08:42:39,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8303 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=2127, Invalid=21435, Unknown=0, NotChecked=0, Total=23562 [2022-01-31 08:42:39,263 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 84 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 483 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 08:42:39,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 476 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 718 Invalid, 0 Unknown, 483 Unchecked, 0.5s Time] [2022-01-31 08:42:39,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5815 states. [2022-01-31 08:42:39,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5815 to 5178. [2022-01-31 08:42:39,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5178 states, 4660 states have (on average 1.3257510729613733) internal successors, (6178), 4866 states have internal predecessors, (6178), 265 states have call successors, (265), 77 states have call predecessors, (265), 252 states have return successors, (5384), 234 states have call predecessors, (5384), 264 states have call successors, (5384) [2022-01-31 08:42:39,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5178 states to 5178 states and 11827 transitions. [2022-01-31 08:42:39,708 INFO L78 Accepts]: Start accepts. Automaton has 5178 states and 11827 transitions. Word has length 63 [2022-01-31 08:42:39,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:42:39,708 INFO L470 AbstractCegarLoop]: Abstraction has 5178 states and 11827 transitions. [2022-01-31 08:42:39,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 62 states have (on average 1.8548387096774193) internal successors, (115), 60 states have internal predecessors, (115), 6 states have call successors, (11), 3 states have call predecessors, (11), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-01-31 08:42:39,708 INFO L276 IsEmpty]: Start isEmpty. Operand 5178 states and 11827 transitions. [2022-01-31 08:42:39,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 08:42:39,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:42:39,726 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:42:39,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-31 08:42:39,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-31 08:42:39,935 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:42:39,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:42:39,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1813139146, now seen corresponding path program 16 times [2022-01-31 08:42:39,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:42:39,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378425300] [2022-01-31 08:42:39,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:42:39,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:42:39,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:40,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:42:40,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:40,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:42:40,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:40,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:42:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:40,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 08:42:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 43 proven. 96 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 08:42:40,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:42:40,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378425300] [2022-01-31 08:42:40,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378425300] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:42:40,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190521394] [2022-01-31 08:42:40,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:42:40,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:42:40,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:42:40,601 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:42:40,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-31 08:42:40,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:42:40,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:42:40,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 61 conjunts are in the unsatisfiable core [2022-01-31 08:42:40,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:42:41,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:42:41,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:42:41,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:42:41,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 34 [2022-01-31 08:42:41,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:42:41,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:42:41,503 INFO L353 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-01-31 08:42:41,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 1 [2022-01-31 08:42:41,530 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 84 proven. 54 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 08:42:41,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:42:42,140 INFO L353 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-01-31 08:42:42,140 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 26 treesize of output 25 [2022-01-31 08:42:42,286 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 5 proven. 134 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 08:42:42,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190521394] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:42:42,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:42:42,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 18] total 50 [2022-01-31 08:42:42,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890118138] [2022-01-31 08:42:42,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:42:42,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 08:42:42,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:42:42,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 08:42:42,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2245, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 08:42:42,288 INFO L87 Difference]: Start difference. First operand 5178 states and 11827 transitions. Second operand has 50 states, 49 states have (on average 2.4285714285714284) internal successors, (119), 48 states have internal predecessors, (119), 7 states have call successors, (11), 4 states have call predecessors, (11), 8 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2022-01-31 08:42:48,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:42:48,075 INFO L93 Difference]: Finished difference Result 6884 states and 15160 transitions. [2022-01-31 08:42:48,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 08:42:48,075 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.4285714285714284) internal successors, (119), 48 states have internal predecessors, (119), 7 states have call successors, (11), 4 states have call predecessors, (11), 8 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) Word has length 63 [2022-01-31 08:42:48,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:42:48,127 INFO L225 Difference]: With dead ends: 6884 [2022-01-31 08:42:48,127 INFO L226 Difference]: Without dead ends: 6154 [2022-01-31 08:42:48,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 113 SyntacticMatches, 6 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6725 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1804, Invalid=17102, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 08:42:48,129 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 185 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 1520 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 2236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 465 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:42:48,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 474 Invalid, 2236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1520 Invalid, 0 Unknown, 465 Unchecked, 1.0s Time] [2022-01-31 08:42:48,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6154 states. [2022-01-31 08:42:48,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6154 to 4976. [2022-01-31 08:42:48,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4976 states, 4454 states have (on average 1.3093848226313427) internal successors, (5832), 4646 states have internal predecessors, (5832), 273 states have call successors, (273), 67 states have call predecessors, (273), 248 states have return successors, (5248), 262 states have call predecessors, (5248), 272 states have call successors, (5248) [2022-01-31 08:42:48,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4976 states to 4976 states and 11353 transitions. [2022-01-31 08:42:48,524 INFO L78 Accepts]: Start accepts. Automaton has 4976 states and 11353 transitions. Word has length 63 [2022-01-31 08:42:48,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:42:48,524 INFO L470 AbstractCegarLoop]: Abstraction has 4976 states and 11353 transitions. [2022-01-31 08:42:48,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.4285714285714284) internal successors, (119), 48 states have internal predecessors, (119), 7 states have call successors, (11), 4 states have call predecessors, (11), 8 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2022-01-31 08:42:48,524 INFO L276 IsEmpty]: Start isEmpty. Operand 4976 states and 11353 transitions. [2022-01-31 08:42:48,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 08:42:48,543 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:42:48,543 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:42:48,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-31 08:42:48,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:42:48,757 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:42:48,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:42:48,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1333256490, now seen corresponding path program 17 times [2022-01-31 08:42:48,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:42:48,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708212899] [2022-01-31 08:42:48,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:42:48,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:42:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:48,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:42:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:48,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:42:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:48,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:42:48,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:48,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 08:42:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-01-31 08:42:49,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:42:49,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708212899] [2022-01-31 08:42:49,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708212899] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:42:49,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182213811] [2022-01-31 08:42:49,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:42:49,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:42:49,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:42:49,020 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:42:49,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-31 08:42:49,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-31 08:42:49,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:42:49,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-31 08:42:49,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:42:49,718 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-31 08:42:49,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:42:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-31 08:42:50,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182213811] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:42:50,013 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:42:50,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 19 [2022-01-31 08:42:50,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817814344] [2022-01-31 08:42:50,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:42:50,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 08:42:50,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:42:50,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 08:42:50,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-01-31 08:42:50,014 INFO L87 Difference]: Start difference. First operand 4976 states and 11353 transitions. Second operand has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 08:42:50,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:42:50,437 INFO L93 Difference]: Finished difference Result 5813 states and 15169 transitions. [2022-01-31 08:42:50,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 08:42:50,437 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 63 [2022-01-31 08:42:50,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:42:50,493 INFO L225 Difference]: With dead ends: 5813 [2022-01-31 08:42:50,493 INFO L226 Difference]: Without dead ends: 5811 [2022-01-31 08:42:50,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 118 SyntacticMatches, 18 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-01-31 08:42:50,494 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 40 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:42:50,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 336 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 08:42:50,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5811 states. [2022-01-31 08:42:51,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5811 to 5218. [2022-01-31 08:42:51,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5218 states, 4660 states have (on average 1.3100858369098713) internal successors, (6105), 4873 states have internal predecessors, (6105), 293 states have call successors, (293), 67 states have call predecessors, (293), 264 states have return successors, (6162), 277 states have call predecessors, (6162), 292 states have call successors, (6162) [2022-01-31 08:42:51,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5218 states to 5218 states and 12560 transitions. [2022-01-31 08:42:51,061 INFO L78 Accepts]: Start accepts. Automaton has 5218 states and 12560 transitions. Word has length 63 [2022-01-31 08:42:51,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:42:51,061 INFO L470 AbstractCegarLoop]: Abstraction has 5218 states and 12560 transitions. [2022-01-31 08:42:51,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 08:42:51,062 INFO L276 IsEmpty]: Start isEmpty. Operand 5218 states and 12560 transitions. [2022-01-31 08:42:51,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 08:42:51,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:42:51,082 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:42:51,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-31 08:42:51,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:42:51,295 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:42:51,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:42:51,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1329076212, now seen corresponding path program 18 times [2022-01-31 08:42:51,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:42:51,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656281119] [2022-01-31 08:42:51,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:42:51,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:42:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:51,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:42:51,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:51,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:42:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:51,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:42:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:51,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 08:42:51,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:51,850 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 11 proven. 139 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 08:42:51,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:42:51,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656281119] [2022-01-31 08:42:51,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656281119] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:42:51,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863329257] [2022-01-31 08:42:51,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 08:42:51,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:42:51,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:42:51,851 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:42:51,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-31 08:42:51,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-31 08:42:51,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:42:51,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 55 conjunts are in the unsatisfiable core [2022-01-31 08:42:51,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:42:52,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:42:52,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-31 08:42:52,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:42:52,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2022-01-31 08:42:52,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:42:52,389 INFO L353 Elim1Store]: treesize reduction 42, result has 40.8 percent of original size [2022-01-31 08:42:52,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 49 [2022-01-31 08:42:52,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:42:52,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:42:52,769 INFO L353 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2022-01-31 08:42:52,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 74 [2022-01-31 08:42:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 5 proven. 130 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-31 08:42:53,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:42:54,418 INFO L353 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-01-31 08:42:54,418 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 08:42:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 51 proven. 81 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 08:42:54,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863329257] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:42:54,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:42:54,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 16] total 61 [2022-01-31 08:42:54,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331202362] [2022-01-31 08:42:54,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:42:54,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 08:42:54,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:42:54,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 08:42:54,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=3325, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 08:42:54,467 INFO L87 Difference]: Start difference. First operand 5218 states and 12560 transitions. Second operand has 61 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 56 states have internal predecessors, (133), 9 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-01-31 08:43:05,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:43:05,159 INFO L93 Difference]: Finished difference Result 9109 states and 21837 transitions. [2022-01-31 08:43:05,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2022-01-31 08:43:05,160 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 56 states have internal predecessors, (133), 9 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 63 [2022-01-31 08:43:05,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:43:05,219 INFO L225 Difference]: With dead ends: 9109 [2022-01-31 08:43:05,219 INFO L226 Difference]: Without dead ends: 8764 [2022-01-31 08:43:05,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 117 SyntacticMatches, 8 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18941 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=3890, Invalid=45172, Unknown=0, NotChecked=0, Total=49062 [2022-01-31 08:43:05,222 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 309 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 3453 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 5461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 3453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1674 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:43:05,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 677 Invalid, 5461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 3453 Invalid, 0 Unknown, 1674 Unchecked, 2.2s Time] [2022-01-31 08:43:05,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8764 states. [2022-01-31 08:43:05,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8764 to 6100. [2022-01-31 08:43:05,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6100 states, 5462 states have (on average 1.3286341999267668) internal successors, (7257), 5743 states have internal predecessors, (7257), 255 states have call successors, (255), 74 states have call predecessors, (255), 382 states have return successors, (6983), 282 states have call predecessors, (6983), 254 states have call successors, (6983) [2022-01-31 08:43:05,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6100 states to 6100 states and 14495 transitions. [2022-01-31 08:43:05,781 INFO L78 Accepts]: Start accepts. Automaton has 6100 states and 14495 transitions. Word has length 63 [2022-01-31 08:43:05,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:43:05,781 INFO L470 AbstractCegarLoop]: Abstraction has 6100 states and 14495 transitions. [2022-01-31 08:43:05,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 56 states have internal predecessors, (133), 9 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-01-31 08:43:05,781 INFO L276 IsEmpty]: Start isEmpty. Operand 6100 states and 14495 transitions. [2022-01-31 08:43:05,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 08:43:05,803 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:43:05,803 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:43:05,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-31 08:43:06,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-31 08:43:06,008 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:43:06,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:43:06,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1358939319, now seen corresponding path program 19 times [2022-01-31 08:43:06,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:43:06,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136602004] [2022-01-31 08:43:06,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:43:06,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:43:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:06,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:43:06,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:06,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:43:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:06,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:43:06,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:06,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 08:43:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:06,348 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 2 proven. 135 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-31 08:43:06,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:43:06,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136602004] [2022-01-31 08:43:06,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136602004] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:43:06,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050538353] [2022-01-31 08:43:06,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 08:43:06,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:43:06,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:43:06,350 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:43:06,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-31 08:43:06,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:06,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-31 08:43:06,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:43:06,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:43:06,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:43:06,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:43:06,638 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:43:06,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-01-31 08:43:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 78 proven. 51 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 08:43:06,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:43:07,154 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 36 treesize of output 30 [2022-01-31 08:43:07,156 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 38 treesize of output 30 [2022-01-31 08:43:07,241 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:43:07,242 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 38 treesize of output 40 [2022-01-31 08:43:07,250 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 [2022-01-31 08:43:07,262 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:43:07,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 44 treesize of output 48 [2022-01-31 08:43:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 6 proven. 120 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 08:43:07,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050538353] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:43:07,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:43:07,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 11] total 34 [2022-01-31 08:43:07,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123502219] [2022-01-31 08:43:07,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:43:07,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 08:43:07,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:43:07,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 08:43:07,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 08:43:07,346 INFO L87 Difference]: Start difference. First operand 6100 states and 14495 transitions. Second operand has 34 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 29 states have internal predecessors, (97), 6 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2022-01-31 08:43:08,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:43:08,314 INFO L93 Difference]: Finished difference Result 6438 states and 14465 transitions. [2022-01-31 08:43:08,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 08:43:08,314 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 29 states have internal predecessors, (97), 6 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 63 [2022-01-31 08:43:08,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:43:08,349 INFO L225 Difference]: With dead ends: 6438 [2022-01-31 08:43:08,349 INFO L226 Difference]: Without dead ends: 6053 [2022-01-31 08:43:08,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=446, Invalid=2746, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 08:43:08,350 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 60 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 562 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:43:08,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 212 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 339 Invalid, 0 Unknown, 562 Unchecked, 0.2s Time] [2022-01-31 08:43:08,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6053 states. [2022-01-31 08:43:09,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6053 to 5779. [2022-01-31 08:43:09,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5779 states, 5167 states have (on average 1.3191407005999614) internal successors, (6816), 5428 states have internal predecessors, (6816), 249 states have call successors, (249), 74 states have call predecessors, (249), 362 states have return successors, (6391), 276 states have call predecessors, (6391), 248 states have call successors, (6391) [2022-01-31 08:43:09,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5779 states to 5779 states and 13456 transitions. [2022-01-31 08:43:09,202 INFO L78 Accepts]: Start accepts. Automaton has 5779 states and 13456 transitions. Word has length 63 [2022-01-31 08:43:09,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:43:09,202 INFO L470 AbstractCegarLoop]: Abstraction has 5779 states and 13456 transitions. [2022-01-31 08:43:09,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 29 states have internal predecessors, (97), 6 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2022-01-31 08:43:09,203 INFO L276 IsEmpty]: Start isEmpty. Operand 5779 states and 13456 transitions. [2022-01-31 08:43:09,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 08:43:09,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:43:09,221 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:43:09,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-31 08:43:09,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-31 08:43:09,422 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:43:09,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:43:09,422 INFO L85 PathProgramCache]: Analyzing trace with hash 992482838, now seen corresponding path program 20 times [2022-01-31 08:43:09,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:43:09,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670318928] [2022-01-31 08:43:09,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:43:09,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:43:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:09,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:43:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:09,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:43:09,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:09,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:43:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:09,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 08:43:09,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:09,692 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-31 08:43:09,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:43:09,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670318928] [2022-01-31 08:43:09,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670318928] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:43:09,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30972084] [2022-01-31 08:43:09,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:43:09,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:43:09,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:43:09,694 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:43:09,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-31 08:43:09,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:43:09,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:43:09,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-31 08:43:09,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:43:10,148 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-31 08:43:10,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:43:10,429 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-31 08:43:10,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30972084] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:43:10,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:43:10,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 21 [2022-01-31 08:43:10,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409274194] [2022-01-31 08:43:10,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:43:10,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 08:43:10,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:43:10,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 08:43:10,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-01-31 08:43:10,430 INFO L87 Difference]: Start difference. First operand 5779 states and 13456 transitions. Second operand has 21 states, 20 states have (on average 2.75) internal successors, (55), 16 states have internal predecessors, (55), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 08:43:10,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:43:10,981 INFO L93 Difference]: Finished difference Result 8101 states and 24418 transitions. [2022-01-31 08:43:10,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 08:43:10,981 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 16 states have internal predecessors, (55), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 63 [2022-01-31 08:43:10,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:43:11,049 INFO L225 Difference]: With dead ends: 8101 [2022-01-31 08:43:11,049 INFO L226 Difference]: Without dead ends: 8099 [2022-01-31 08:43:11,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 120 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-01-31 08:43:11,050 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 48 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 08:43:11,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 335 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 08:43:11,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8099 states. [2022-01-31 08:43:12,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8099 to 6625. [2022-01-31 08:43:12,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6625 states, 5952 states have (on average 1.3390456989247312) internal successors, (7970), 6247 states have internal predecessors, (7970), 279 states have call successors, (279), 74 states have call predecessors, (279), 393 states have return successors, (7395), 303 states have call predecessors, (7395), 278 states have call successors, (7395) [2022-01-31 08:43:12,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6625 states to 6625 states and 15644 transitions. [2022-01-31 08:43:12,513 INFO L78 Accepts]: Start accepts. Automaton has 6625 states and 15644 transitions. Word has length 63 [2022-01-31 08:43:12,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:43:12,513 INFO L470 AbstractCegarLoop]: Abstraction has 6625 states and 15644 transitions. [2022-01-31 08:43:12,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 16 states have internal predecessors, (55), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 08:43:12,513 INFO L276 IsEmpty]: Start isEmpty. Operand 6625 states and 15644 transitions. [2022-01-31 08:43:12,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 08:43:12,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:43:12,535 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:43:12,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-31 08:43:12,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-31 08:43:12,752 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:43:12,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:43:12,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1247481909, now seen corresponding path program 21 times [2022-01-31 08:43:12,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:43:12,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026228925] [2022-01-31 08:43:12,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:43:12,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:43:12,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:13,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:43:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:13,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:43:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:13,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:43:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:13,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 08:43:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:13,276 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 49 proven. 90 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 08:43:13,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:43:13,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026228925] [2022-01-31 08:43:13,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026228925] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:43:13,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904808177] [2022-01-31 08:43:13,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:43:13,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:43:13,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:43:13,278 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:43:13,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-31 08:43:13,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-31 08:43:13,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:43:13,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-31 08:43:13,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:43:13,775 INFO L353 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2022-01-31 08:43:13,775 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 2 case distinctions, treesize of input 30 treesize of output 33 [2022-01-31 08:43:14,032 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 08:43:14,033 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 08:43:14,095 INFO L353 Elim1Store]: treesize reduction 101, result has 12.9 percent of original size [2022-01-31 08:43:14,095 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 38 treesize of output 31 [2022-01-31 08:43:14,277 INFO L353 Elim1Store]: treesize reduction 68, result has 35.2 percent of original size [2022-01-31 08:43:14,277 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 47 treesize of output 57 [2022-01-31 08:43:33,126 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 3 proven. 101 refuted. 38 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 08:43:33,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:43:34,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904808177] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:43:34,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 08:43:34,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2022-01-31 08:43:34,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678639482] [2022-01-31 08:43:34,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 08:43:34,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 08:43:34,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:43:34,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 08:43:34,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1490, Unknown=9, NotChecked=0, Total=1640 [2022-01-31 08:43:34,262 INFO L87 Difference]: Start difference. First operand 6625 states and 15644 transitions. Second operand has 40 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 38 states have internal predecessors, (89), 6 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 08:45:53,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:45:53,970 INFO L93 Difference]: Finished difference Result 9872 states and 22104 transitions. [2022-01-31 08:45:53,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 08:45:53,971 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 38 states have internal predecessors, (89), 6 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) Word has length 63 [2022-01-31 08:45:53,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:45:54,032 INFO L225 Difference]: With dead ends: 9872 [2022-01-31 08:45:54,032 INFO L226 Difference]: Without dead ends: 9680 [2022-01-31 08:45:54,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3573 ImplicationChecksByTransitivity, 157.6s TimeCoverageRelationStatistics Valid=931, Invalid=9303, Unknown=68, NotChecked=0, Total=10302 [2022-01-31 08:45:54,034 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 59 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 978 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:45:54,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 373 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 505 Invalid, 0 Unknown, 978 Unchecked, 0.3s Time] [2022-01-31 08:45:54,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9680 states. [2022-01-31 08:45:54,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9680 to 7531. [2022-01-31 08:45:55,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7531 states, 6758 states have (on average 1.3324948209529446) internal successors, (9005), 7089 states have internal predecessors, (9005), 319 states have call successors, (319), 85 states have call predecessors, (319), 453 states have return successors, (8042), 356 states have call predecessors, (8042), 318 states have call successors, (8042) [2022-01-31 08:45:55,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7531 states to 7531 states and 17366 transitions. [2022-01-31 08:45:55,045 INFO L78 Accepts]: Start accepts. Automaton has 7531 states and 17366 transitions. Word has length 63 [2022-01-31 08:45:55,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:45:55,045 INFO L470 AbstractCegarLoop]: Abstraction has 7531 states and 17366 transitions. [2022-01-31 08:45:55,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 38 states have internal predecessors, (89), 6 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 08:45:55,045 INFO L276 IsEmpty]: Start isEmpty. Operand 7531 states and 17366 transitions. [2022-01-31 08:45:55,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 08:45:55,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:45:55,109 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:45:55,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-31 08:45:55,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-31 08:45:55,310 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:45:55,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:45:55,310 INFO L85 PathProgramCache]: Analyzing trace with hash -725745993, now seen corresponding path program 2 times [2022-01-31 08:45:55,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:45:55,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16785212] [2022-01-31 08:45:55,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:45:55,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:45:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:55,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:45:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:55,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:45:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:55,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:45:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:55,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 08:45:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:55,558 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-01-31 08:45:55,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:45:55,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16785212] [2022-01-31 08:45:55,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16785212] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:45:55,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988036724] [2022-01-31 08:45:55,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:45:55,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:45:55,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:45:55,560 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:45:55,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-31 08:45:55,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:45:55,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:45:55,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-31 08:45:55,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:45:56,020 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-01-31 08:45:56,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:45:56,385 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-01-31 08:45:56,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988036724] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:45:56,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:45:56,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 20 [2022-01-31 08:45:56,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128215959] [2022-01-31 08:45:56,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:45:56,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 08:45:56,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:45:56,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 08:45:56,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2022-01-31 08:45:56,387 INFO L87 Difference]: Start difference. First operand 7531 states and 17366 transitions. Second operand has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 15 states have internal predecessors, (41), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 08:45:56,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:45:56,913 INFO L93 Difference]: Finished difference Result 9226 states and 23979 transitions. [2022-01-31 08:45:56,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 08:45:56,914 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 15 states have internal predecessors, (41), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 63 [2022-01-31 08:45:56,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:45:56,980 INFO L225 Difference]: With dead ends: 9226 [2022-01-31 08:45:56,980 INFO L226 Difference]: Without dead ends: 9224 [2022-01-31 08:45:56,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 121 SyntacticMatches, 14 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-01-31 08:45:56,981 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 43 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 08:45:56,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 349 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 08:45:56,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9224 states. [2022-01-31 08:45:58,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9224 to 7877. [2022-01-31 08:45:58,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7877 states, 7079 states have (on average 1.3408673541460658) internal successors, (9492), 7429 states have internal predecessors, (9492), 328 states have call successors, (328), 85 states have call predecessors, (328), 469 states have return successors, (8418), 362 states have call predecessors, (8418), 327 states have call successors, (8418) [2022-01-31 08:45:58,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7877 states to 7877 states and 18238 transitions. [2022-01-31 08:45:58,221 INFO L78 Accepts]: Start accepts. Automaton has 7877 states and 18238 transitions. Word has length 63 [2022-01-31 08:45:58,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:45:58,221 INFO L470 AbstractCegarLoop]: Abstraction has 7877 states and 18238 transitions. [2022-01-31 08:45:58,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 15 states have internal predecessors, (41), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 08:45:58,221 INFO L276 IsEmpty]: Start isEmpty. Operand 7877 states and 18238 transitions. [2022-01-31 08:45:58,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 08:45:58,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:45:58,251 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:45:58,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-31 08:45:58,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:45:58,451 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:45:58,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:45:58,452 INFO L85 PathProgramCache]: Analyzing trace with hash 798993689, now seen corresponding path program 22 times [2022-01-31 08:45:58,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:45:58,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381201182] [2022-01-31 08:45:58,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:45:58,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:45:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:58,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:45:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:58,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:45:58,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:58,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:45:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:58,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 08:45:58,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:58,537 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-31 08:45:58,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:45:58,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381201182] [2022-01-31 08:45:58,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381201182] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:45:58,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956750830] [2022-01-31 08:45:58,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:45:58,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:45:58,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:45:58,539 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:45:58,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-31 08:45:58,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:45:58,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:45:58,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 58 conjunts are in the unsatisfiable core [2022-01-31 08:45:58,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:45:58,894 INFO L353 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-01-31 08:45:58,894 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 27 treesize of output 32 [2022-01-31 08:45:58,975 INFO L353 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2022-01-31 08:45:58,976 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 40 treesize of output 48 [2022-01-31 08:45:59,093 INFO L353 Elim1Store]: treesize reduction 99, result has 27.7 percent of original size [2022-01-31 08:45:59,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 58 treesize of output 68 [2022-01-31 08:45:59,260 INFO L353 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-01-31 08:45:59,261 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 26 treesize of output 25 [2022-01-31 08:45:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 19 proven. 137 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 08:45:59,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:46:42,985 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 68 treesize of output 62 [2022-01-31 08:46:43,009 INFO L353 Elim1Store]: treesize reduction 21, result has 46.2 percent of original size [2022-01-31 08:46:43,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 3748 treesize of output 3633 [2022-01-31 08:46:45,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:46:45,324 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 70 treesize of output 72 [2022-01-31 08:46:45,337 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 [2022-01-31 08:46:45,371 INFO L353 Elim1Store]: treesize reduction 13, result has 69.8 percent of original size [2022-01-31 08:46:45,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 946 treesize of output 937 [2022-01-31 08:46:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 6 proven. 141 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 08:46:50,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956750830] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:46:50,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:46:50,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 27, 24] total 53 [2022-01-31 08:46:50,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108286682] [2022-01-31 08:46:50,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:46:50,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 08:46:50,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:46:50,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 08:46:50,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2442, Unknown=25, NotChecked=0, Total=2756 [2022-01-31 08:46:50,328 INFO L87 Difference]: Start difference. First operand 7877 states and 18238 transitions. Second operand has 53 states, 52 states have (on average 2.326923076923077) internal successors, (121), 51 states have internal predecessors, (121), 5 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-01-31 08:48:15,165 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-01-31 08:48:15,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2022-01-31 08:48:15,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 08:48:15,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2507 ImplicationChecksByTransitivity, 126.5s TimeCoverageRelationStatistics Valid=592, Invalid=5990, Unknown=60, NotChecked=0, Total=6642 [2022-01-31 08:48:15,168 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:48:15,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 184 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 103 Invalid, 0 Unknown, 125 Unchecked, 0.1s Time] [2022-01-31 08:48:15,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-31 08:48:15,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:48:15,373 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:626) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:193) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:160) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 56 more [2022-01-31 08:48:15,377 INFO L158 Benchmark]: Toolchain (without parser) took 640314.83ms. Allocated memory was 217.1MB in the beginning and 902.8MB in the end (delta: 685.8MB). Free memory was 164.1MB in the beginning and 748.6MB in the end (delta: -584.5MB). Peak memory consumption was 102.0MB. Max. memory is 8.0GB. [2022-01-31 08:48:15,377 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 217.1MB. Free memory is still 180.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 08:48:15,377 INFO L158 Benchmark]: CACSL2BoogieTranslator took 173.64ms. Allocated memory was 217.1MB in the beginning and 300.9MB in the end (delta: 83.9MB). Free memory was 163.8MB in the beginning and 274.1MB in the end (delta: -110.3MB). Peak memory consumption was 7.5MB. Max. memory is 8.0GB. [2022-01-31 08:48:15,377 INFO L158 Benchmark]: Boogie Preprocessor took 31.29ms. Allocated memory is still 300.9MB. Free memory was 274.1MB in the beginning and 272.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 08:48:15,377 INFO L158 Benchmark]: RCFGBuilder took 294.72ms. Allocated memory is still 300.9MB. Free memory was 272.6MB in the beginning and 260.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-01-31 08:48:15,377 INFO L158 Benchmark]: IcfgTransformer took 27.33ms. Allocated memory is still 300.9MB. Free memory was 260.0MB in the beginning and 258.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 08:48:15,377 INFO L158 Benchmark]: TraceAbstraction took 639783.52ms. Allocated memory was 300.9MB in the beginning and 902.8MB in the end (delta: 601.9MB). Free memory was 257.9MB in the beginning and 748.6MB in the end (delta: -490.7MB). Peak memory consumption was 112.4MB. Max. memory is 8.0GB. [2022-01-31 08:48:15,378 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 217.1MB. Free memory is still 180.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 173.64ms. Allocated memory was 217.1MB in the beginning and 300.9MB in the end (delta: 83.9MB). Free memory was 163.8MB in the beginning and 274.1MB in the end (delta: -110.3MB). Peak memory consumption was 7.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.29ms. Allocated memory is still 300.9MB. Free memory was 274.1MB in the beginning and 272.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 294.72ms. Allocated memory is still 300.9MB. Free memory was 272.6MB in the beginning and 260.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 27.33ms. Allocated memory is still 300.9MB. Free memory was 260.0MB in the beginning and 258.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 639783.52ms. Allocated memory was 300.9MB in the beginning and 902.8MB in the end (delta: 601.9MB). Free memory was 257.9MB in the beginning and 748.6MB in the end (delta: -490.7MB). Peak memory consumption was 112.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...