/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/max.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:34:39,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:34:39,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:34:39,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 08:34:39,089 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 08:34:39,090 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 08:34:39,091 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 08:34:39,092 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 08:34:39,093 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 08:34:39,093 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 08:34:39,094 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 08:34:39,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 08:34:39,095 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:34:39,096 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:34:39,097 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:34:39,097 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:34:39,098 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:34:39,099 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:34:39,100 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:34:39,102 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:34:39,103 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:34:39,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:34:39,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:34:39,137 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:34:39,139 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 08:34:39,139 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 08:34:39,139 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 08:34:39,140 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 08:34:39,140 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 08:34:39,141 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 08:34:39,141 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 08:34:39,141 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 08:34:39,142 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 08:34:39,142 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 08:34:39,155 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 08:34:39,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 08:34:39,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 08:34:39,156 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 08:34:39,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:34:39,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:34:39,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:34:39,159 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:34:39,172 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:34:39,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:34:39,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:34:39,174 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:34:39,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:34:39,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:34:39,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:34:39,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:34:39,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:34:39,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:34:39,174 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:34:39,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:34:39,175 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:34:39,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:34:39,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:34:39,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:34:39,175 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:34:39,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:34:39,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:34:39,175 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:34:39,176 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:34:39,176 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:34:39,176 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:34:39,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:34:39,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:34:39,370 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:34:39,370 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:34:39,378 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:34:39,379 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/max.i [2022-01-31 08:34:39,425 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03c328dba/85551f63feb4463db8052caceaccaed6/FLAG7ad6ce793 [2022-01-31 08:34:39,747 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:34:39,747 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/max.i [2022-01-31 08:34:39,757 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03c328dba/85551f63feb4463db8052caceaccaed6/FLAG7ad6ce793 [2022-01-31 08:34:40,192 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03c328dba/85551f63feb4463db8052caceaccaed6 [2022-01-31 08:34:40,193 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:34:40,195 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:34:40,198 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:34:40,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:34:40,200 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:34:40,201 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:34:40" (1/1) ... [2022-01-31 08:34:40,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@775bf8fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:34:40, skipping insertion in model container [2022-01-31 08:34:40,202 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:34:40" (1/1) ... [2022-01-31 08:34:40,206 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:34:40,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:34:40,339 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/max.i[1295,1308] [2022-01-31 08:34:40,341 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:34:40,346 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:34:40,359 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/max.i[1295,1308] [2022-01-31 08:34:40,360 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:34:40,368 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:34:40,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:34:40 WrapperNode [2022-01-31 08:34:40,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:34:40,369 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:34:40,369 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:34:40,369 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:34:40,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:34:40" (1/1) ... [2022-01-31 08:34:40,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:34:40" (1/1) ... [2022-01-31 08:34:40,389 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:34:40" (1/1) ... [2022-01-31 08:34:40,389 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:34:40" (1/1) ... [2022-01-31 08:34:40,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:34:40" (1/1) ... [2022-01-31 08:34:40,400 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:34:40" (1/1) ... [2022-01-31 08:34:40,401 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:34:40" (1/1) ... [2022-01-31 08:34:40,402 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:34:40,403 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:34:40,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:34:40,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:34:40,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:34:40" (1/1) ... [2022-01-31 08:34:40,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:34:40,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:34:40,443 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 08:34:40,464 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 08:34:40,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:34:40,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:34:40,482 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:34:40,482 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-01-31 08:34:40,482 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:34:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:34:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:34:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 08:34:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 08:34:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:34:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:34:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 08:34:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-01-31 08:34:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:34:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:34:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:34:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:34:40,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:34:40,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:34:40,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:34:40,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:34:40,569 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:34:40,570 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:34:40,723 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:34:40,728 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:34:40,728 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 08:34:40,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:34:40 BoogieIcfgContainer [2022-01-31 08:34:40,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:34:40,730 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:34:40,730 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:34:40,730 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:34:40,732 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:34:40" (1/1) ... [2022-01-31 08:34:40,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:34:40 BasicIcfg [2022-01-31 08:34:40,746 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:34:40,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:34:40,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:34:40,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:34:40,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:34:40" (1/4) ... [2022-01-31 08:34:40,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@181bc413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:34:40, skipping insertion in model container [2022-01-31 08:34:40,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:34:40" (2/4) ... [2022-01-31 08:34:40,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@181bc413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:34:40, skipping insertion in model container [2022-01-31 08:34:40,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:34:40" (3/4) ... [2022-01-31 08:34:40,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@181bc413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:34:40, skipping insertion in model container [2022-01-31 08:34:40,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:34:40" (4/4) ... [2022-01-31 08:34:40,756 INFO L111 eAbstractionObserver]: Analyzing ICFG max.iJordan [2022-01-31 08:34:40,759 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:34:40,759 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:34:40,790 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:34:40,797 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 08:34:40,798 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:34:40,813 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 24 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 08:34:40,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 08:34:40,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:34:40,822 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 08:34:40,823 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:34:40,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:34:40,830 INFO L85 PathProgramCache]: Analyzing trace with hash -360212467, now seen corresponding path program 1 times [2022-01-31 08:34:40,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:34:40,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134886936] [2022-01-31 08:34:40,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:34:40,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:34:40,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:41,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:34:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:41,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:34:41,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:41,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 08:34:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:41,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:34:41,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:41,063 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 08:34:41,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:34:41,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134886936] [2022-01-31 08:34:41,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134886936] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:34:41,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:34:41,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 08:34:41,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159162886] [2022-01-31 08:34:41,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:34:41,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:34:41,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:34:41,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:34:41,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:34:41,089 INFO L87 Difference]: Start difference. First operand has 33 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 24 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:34:41,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:34:41,143 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2022-01-31 08:34:41,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:34:41,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-01-31 08:34:41,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:34:41,155 INFO L225 Difference]: With dead ends: 33 [2022-01-31 08:34:41,155 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 08:34:41,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:34:41,161 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 40 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 08:34:41,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 40 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:34:41,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 08:34:41,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-31 08:34:41,186 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 08:34:41,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-31 08:34:41,189 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2022-01-31 08:34:41,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:34:41,189 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-31 08:34:41,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:34:41,190 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-31 08:34:41,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 08:34:41,192 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:34:41,192 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 08:34:41,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:34:41,193 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:34:41,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:34:41,195 INFO L85 PathProgramCache]: Analyzing trace with hash -535429841, now seen corresponding path program 1 times [2022-01-31 08:34:41,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:34:41,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998434348] [2022-01-31 08:34:41,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:34:41,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:34:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:41,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:34:41,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:41,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:34:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:41,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 08:34:41,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:41,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:34:41,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:41,344 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 08:34:41,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:34:41,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998434348] [2022-01-31 08:34:41,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998434348] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:34:41,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764347625] [2022-01-31 08:34:41,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:34:41,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:34:41,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:34:41,347 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 08:34:41,348 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 08:34:41,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:41,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:34:41,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:34:41,531 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 08:34:41,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:34:41,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764347625] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:34:41,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:34:41,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-01-31 08:34:41,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820447778] [2022-01-31 08:34:41,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:34:41,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 08:34:41,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:34:41,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 08:34:41,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-31 08:34:41,544 INFO L87 Difference]: Start difference. First operand 27 states and 31 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 08:34:41,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:34:41,574 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-01-31 08:34:41,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 08:34:41,574 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 08:34:41,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:34:41,575 INFO L225 Difference]: With dead ends: 31 [2022-01-31 08:34:41,575 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 08:34:41,576 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 08:34:41,576 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 31 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 38 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 08:34:41,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 38 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:34:41,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 08:34:41,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2022-01-31 08:34:41,584 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 08:34:41,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-31 08:34:41,585 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 32 [2022-01-31 08:34:41,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:34:41,586 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-31 08:34:41,586 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 08:34:41,586 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-31 08:34:41,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 08:34:41,587 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:34:41,587 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:34:41,608 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 08:34:41,803 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 08:34:41,804 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:34:41,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:34:41,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1400616969, now seen corresponding path program 1 times [2022-01-31 08:34:41,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:34:41,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999687309] [2022-01-31 08:34:41,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:34:41,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:34:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:41,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:34:41,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:41,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:34:41,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:41,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 08:34:41,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:41,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 08:34:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 08:34:41,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:34:41,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999687309] [2022-01-31 08:34:41,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999687309] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:34:41,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:34:41,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 08:34:41,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159388088] [2022-01-31 08:34:41,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:34:41,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 08:34:41,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:34:41,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 08:34:41,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 08:34:41,955 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 08:34:42,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:34:42,019 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-01-31 08:34:42,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 08:34:42,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 44 [2022-01-31 08:34:42,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:34:42,021 INFO L225 Difference]: With dead ends: 30 [2022-01-31 08:34:42,021 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 08:34:42,022 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 08:34:42,023 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:34:42,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 32 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:34:42,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 08:34:42,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-01-31 08:34:42,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:34:42,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-01-31 08:34:42,032 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 44 [2022-01-31 08:34:42,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:34:42,034 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-01-31 08:34:42,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 08:34:42,034 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-01-31 08:34:42,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 08:34:42,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:34:42,036 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:34:42,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 08:34:42,037 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:34:42,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:34:42,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1084773893, now seen corresponding path program 1 times [2022-01-31 08:34:42,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:34:42,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085244434] [2022-01-31 08:34:42,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:34:42,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:34:42,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:42,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:34:42,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:42,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:34:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:42,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 08:34:42,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:42,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 08:34:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:42,168 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 08:34:42,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:34:42,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085244434] [2022-01-31 08:34:42,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085244434] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:34:42,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729443127] [2022-01-31 08:34:42,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:34:42,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:34:42,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:34:42,171 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 08:34:42,172 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 08:34:42,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:42,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 08:34:42,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:34:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 08:34:42,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:34:42,486 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 08:34:42,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729443127] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:34:42,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:34:42,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 11 [2022-01-31 08:34:42,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099414529] [2022-01-31 08:34:42,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:34:42,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 08:34:42,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:34:42,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 08:34:42,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-01-31 08:34:42,488 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 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 08:34:42,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:34:42,601 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2022-01-31 08:34:42,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 08:34:42,602 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 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 46 [2022-01-31 08:34:42,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:34:42,606 INFO L225 Difference]: With dead ends: 36 [2022-01-31 08:34:42,606 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 08:34:42,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 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 08:34:42,609 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 71 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:34:42,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 47 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:34:42,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 08:34:42,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2022-01-31 08:34:42,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 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 08:34:42,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-01-31 08:34:42,617 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 46 [2022-01-31 08:34:42,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:34:42,618 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-01-31 08:34:42,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 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 08:34:42,618 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-01-31 08:34:42,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 08:34:42,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:34:42,619 INFO L514 BasicCegarLoop]: trace histogram [6, 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 08:34:42,662 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 08:34:42,835 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 08:34:42,836 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:34:42,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:34:42,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1443484705, now seen corresponding path program 2 times [2022-01-31 08:34:42,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:34:42,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918694069] [2022-01-31 08:34:42,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:34:42,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:34:42,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:42,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:34:42,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:42,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:34:42,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:43,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 08:34:43,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:43,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 08:34:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 08:34:43,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:34:43,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918694069] [2022-01-31 08:34:43,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918694069] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:34:43,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098970414] [2022-01-31 08:34:43,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:34:43,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:34:43,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:34:43,249 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 08:34:43,264 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 08:34:43,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:34:43,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:34:43,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-31 08:34:43,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:34:43,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:34:43,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-01-31 08:34:43,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:34:43,659 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:34:43,659 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 41 treesize of output 26 [2022-01-31 08:34:43,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:34:43,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:34:43,752 INFO L353 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2022-01-31 08:34:43,752 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 39 treesize of output 41 [2022-01-31 08:34:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 24 proven. 63 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 08:34:44,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:34:47,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098970414] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:34:47,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 08:34:47,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2022-01-31 08:34:47,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901989676] [2022-01-31 08:34:47,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 08:34:47,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 08:34:47,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:34:47,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 08:34:47,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1521, Unknown=1, NotChecked=0, Total=1722 [2022-01-31 08:34:47,444 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 32 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 08:34:48,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:34:48,058 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2022-01-31 08:34:48,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 08:34:48,058 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 58 [2022-01-31 08:34:48,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:34:48,060 INFO L225 Difference]: With dead ends: 89 [2022-01-31 08:34:48,060 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 08:34:48,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=383, Invalid=2922, Unknown=1, NotChecked=0, Total=3306 [2022-01-31 08:34:48,062 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 78 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 324 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:34:48,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 270 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 344 Invalid, 0 Unknown, 324 Unchecked, 0.2s Time] [2022-01-31 08:34:48,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 08:34:48,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 65. [2022-01-31 08:34:48,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 54 states have internal predecessors, (64), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-01-31 08:34:48,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 80 transitions. [2022-01-31 08:34:48,067 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 80 transitions. Word has length 58 [2022-01-31 08:34:48,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:34:48,067 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 80 transitions. [2022-01-31 08:34:48,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 08:34:48,068 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 80 transitions. [2022-01-31 08:34:48,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 08:34:48,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:34:48,068 INFO L514 BasicCegarLoop]: trace histogram [6, 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 08:34:48,088 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 08:34:48,274 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 08:34:48,274 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:34:48,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:34:48,275 INFO L85 PathProgramCache]: Analyzing trace with hash -750383008, now seen corresponding path program 1 times [2022-01-31 08:34:48,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:34:48,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888278333] [2022-01-31 08:34:48,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:34:48,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:34:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:48,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:34:48,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:48,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:34:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:49,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 08:34:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:49,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 08:34:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 3 proven. 80 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-31 08:34:49,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:34:49,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888278333] [2022-01-31 08:34:49,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888278333] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:34:49,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945352811] [2022-01-31 08:34:49,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:34:49,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:34:49,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:34:49,547 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 08:34:49,549 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 08:34:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:49,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 94 conjunts are in the unsatisfiable core [2022-01-31 08:34:49,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:34:49,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:34:49,963 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 47 treesize of output 29 [2022-01-31 08:34:50,219 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 28 treesize of output 16 [2022-01-31 08:34:50,268 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 18 treesize of output 14 [2022-01-31 08:34:52,327 WARN L860 $PredicateComparison]: unable to prove that (exists ((aux_div_v_main_~ret2~0_BEFORE_CALL_1_132 Int) (|v_main_~#x~0.base_BEFORE_CALL_4| Int)) (let ((.cse1 (* (select (select |c_#memory_int| |v_main_~#x~0.base_BEFORE_CALL_4|) 4) 4294967295)) (.cse0 (* aux_div_v_main_~ret2~0_BEFORE_CALL_1_132 4294967296))) (and (< .cse0 (+ .cse1 2147483648)) (<= .cse1 (+ .cse0 2147483648))))) is different from true [2022-01-31 08:35:45,044 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:35:45,045 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 82 treesize of output 62 [2022-01-31 08:35:45,279 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 3 proven. 85 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2022-01-31 08:35:45,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:35:46,061 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 44 treesize of output 40 [2022-01-31 08:35:46,064 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 83 treesize of output 75 [2022-01-31 08:35:46,113 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 45 treesize of output 41 [2022-01-31 08:35:46,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:35:46,972 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 163 treesize of output 139 [2022-01-31 08:35:46,975 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 177 treesize of output 145 [2022-01-31 08:35:47,841 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:35:47,841 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 103 treesize of output 95 [2022-01-31 08:35:47,868 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 28 treesize of output 24 [2022-01-31 08:35:47,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:35:47,941 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 126 treesize of output 110 [2022-01-31 08:35:47,978 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 86 [2022-01-31 08:35:47,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:35:47,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:35:47,982 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 24 [2022-01-31 08:35:48,163 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 08:35:48,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945352811] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:35:48,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:35:48,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 26] total 71 [2022-01-31 08:35:48,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007801731] [2022-01-31 08:35:48,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:35:48,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 08:35:48,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:35:48,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 08:35:48,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=4474, Unknown=22, NotChecked=136, Total=4970 [2022-01-31 08:35:48,168 INFO L87 Difference]: Start difference. First operand 65 states and 80 transitions. Second operand has 71 states, 65 states have (on average 1.8461538461538463) internal successors, (120), 61 states have internal predecessors, (120), 8 states have call successors, (12), 5 states have call predecessors, (12), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-01-31 08:40:13,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:40:13,976 INFO L93 Difference]: Finished difference Result 206 states and 254 transitions. [2022-01-31 08:40:13,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 08:40:13,977 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 65 states have (on average 1.8461538461538463) internal successors, (120), 61 states have internal predecessors, (120), 8 states have call successors, (12), 5 states have call predecessors, (12), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 58 [2022-01-31 08:40:13,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:40:13,978 INFO L225 Difference]: With dead ends: 206 [2022-01-31 08:40:13,978 INFO L226 Difference]: Without dead ends: 199 [2022-01-31 08:40:13,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 131 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5325 ImplicationChecksByTransitivity, 321.4s TimeCoverageRelationStatistics Valid=1560, Invalid=15612, Unknown=124, NotChecked=260, Total=17556 [2022-01-31 08:40:13,983 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 251 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 3289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1388 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:40:13,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 242 Invalid, 3289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1774 Invalid, 0 Unknown, 1388 Unchecked, 1.2s Time] [2022-01-31 08:40:13,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-31 08:40:13,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 126. [2022-01-31 08:40:13,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 109 states have (on average 1.238532110091743) internal successors, (135), 111 states have internal predecessors, (135), 9 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2022-01-31 08:40:13,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 161 transitions. [2022-01-31 08:40:13,991 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 161 transitions. Word has length 58 [2022-01-31 08:40:13,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:40:13,992 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 161 transitions. [2022-01-31 08:40:13,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 65 states have (on average 1.8461538461538463) internal successors, (120), 61 states have internal predecessors, (120), 8 states have call successors, (12), 5 states have call predecessors, (12), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-01-31 08:40:13,992 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 161 transitions. [2022-01-31 08:40:13,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 08:40:13,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:40:13,993 INFO L514 BasicCegarLoop]: trace histogram [6, 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 08:40:14,025 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 08:40:14,211 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 08:40:14,211 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:40:14,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:40:14,212 INFO L85 PathProgramCache]: Analyzing trace with hash -946896513, now seen corresponding path program 2 times [2022-01-31 08:40:14,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:40:14,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761176013] [2022-01-31 08:40:14,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:40:14,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:40:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:40:14,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:40:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:40:14,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:40:14,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:40:14,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 08:40:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:40:14,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 08:40:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:40:14,771 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 24 proven. 59 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-31 08:40:14,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:40:14,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761176013] [2022-01-31 08:40:14,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761176013] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:40:14,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579355568] [2022-01-31 08:40:14,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:40:14,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:40:14,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:40:14,780 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 08:40:14,781 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 08:40:14,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:40:14,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:40:14,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-31 08:40:14,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:40:15,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:40:15,242 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:40:15,242 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 48 treesize of output 28 [2022-01-31 08:40:15,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:40:15,394 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:40:15,394 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 43 treesize of output 28 [2022-01-31 08:40:15,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:40:15,453 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:40:15,454 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 38 treesize of output 25 [2022-01-31 08:40:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 1 proven. 87 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:40:15,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:40:16,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579355568] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:40:16,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 08:40:16,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 42 [2022-01-31 08:40:16,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953870098] [2022-01-31 08:40:16,406 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 08:40:16,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 08:40:16,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:40:16,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 08:40:16,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2336, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 08:40:16,408 INFO L87 Difference]: Start difference. First operand 126 states and 161 transitions. Second operand has 42 states, 40 states have (on average 2.025) internal successors, (81), 39 states have internal predecessors, (81), 5 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-31 08:40:19,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:40:19,026 INFO L93 Difference]: Finished difference Result 268 states and 329 transitions. [2022-01-31 08:40:19,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 08:40:19,027 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.025) internal successors, (81), 39 states have internal predecessors, (81), 5 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 58 [2022-01-31 08:40:19,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:40:19,030 INFO L225 Difference]: With dead ends: 268 [2022-01-31 08:40:19,030 INFO L226 Difference]: Without dead ends: 265 [2022-01-31 08:40:19,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 58 SyntacticMatches, 11 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3179 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=998, Invalid=8902, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 08:40:19,032 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 194 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1127 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 08:40:19,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 155 Invalid, 1893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 696 Invalid, 0 Unknown, 1127 Unchecked, 0.4s Time] [2022-01-31 08:40:19,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-01-31 08:40:19,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 175. [2022-01-31 08:40:19,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 154 states have (on average 1.2337662337662338) internal successors, (190), 158 states have internal predecessors, (190), 10 states have call successors, (10), 8 states have call predecessors, (10), 10 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2022-01-31 08:40:19,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 220 transitions. [2022-01-31 08:40:19,045 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 220 transitions. Word has length 58 [2022-01-31 08:40:19,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:40:19,045 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 220 transitions. [2022-01-31 08:40:19,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.025) internal successors, (81), 39 states have internal predecessors, (81), 5 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-31 08:40:19,046 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 220 transitions. [2022-01-31 08:40:19,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 08:40:19,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:40:19,047 INFO L514 BasicCegarLoop]: trace histogram [6, 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 08:40:19,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-31 08:40:19,263 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 08:40:19,264 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:40:19,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:40:19,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1452455138, now seen corresponding path program 3 times [2022-01-31 08:40:19,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:40:19,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212689590] [2022-01-31 08:40:19,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:40:19,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:40:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:40:19,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:40:19,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:40:19,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:40:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:40:19,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 08:40:19,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:40:19,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 08:40:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:40:19,740 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 24 proven. 60 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 08:40:19,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:40:19,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212689590] [2022-01-31 08:40:19,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212689590] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:40:19,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785881696] [2022-01-31 08:40:19,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:40:19,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:40:19,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:40:19,755 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 08:40:19,756 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 08:40:19,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-31 08:40:19,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:40:19,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-31 08:40:19,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:40:20,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:40:20,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:40:20,241 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 19 treesize of output 10 [2022-01-31 08:40:20,351 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 16 treesize of output 12 [2022-01-31 08:40:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 08:40:20,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:40:21,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785881696] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:40:21,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 08:40:21,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 41 [2022-01-31 08:40:21,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159273229] [2022-01-31 08:40:21,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 08:40:21,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 08:40:21,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:40:21,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 08:40:21,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1583, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 08:40:21,017 INFO L87 Difference]: Start difference. First operand 175 states and 220 transitions. Second operand has 41 states, 40 states have (on average 2.125) internal successors, (85), 38 states have internal predecessors, (85), 5 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 08:40:23,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:40:23,617 INFO L93 Difference]: Finished difference Result 447 states and 565 transitions. [2022-01-31 08:40:23,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 08:40:23,617 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.125) internal successors, (85), 38 states have internal predecessors, (85), 5 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 58 [2022-01-31 08:40:23,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:40:23,620 INFO L225 Difference]: With dead ends: 447 [2022-01-31 08:40:23,620 INFO L226 Difference]: Without dead ends: 441 [2022-01-31 08:40:23,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2303 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=857, Invalid=7885, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 08:40:23,622 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 141 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 2606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1196 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 08:40:23,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 430 Invalid, 2606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1329 Invalid, 0 Unknown, 1196 Unchecked, 0.7s Time] [2022-01-31 08:40:23,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-01-31 08:40:23,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 265. [2022-01-31 08:40:23,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 235 states have (on average 1.2340425531914894) internal successors, (290), 239 states have internal predecessors, (290), 15 states have call successors, (15), 12 states have call predecessors, (15), 14 states have return successors, (44), 13 states have call predecessors, (44), 14 states have call successors, (44) [2022-01-31 08:40:23,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 349 transitions. [2022-01-31 08:40:23,645 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 349 transitions. Word has length 58 [2022-01-31 08:40:23,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:40:23,645 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 349 transitions. [2022-01-31 08:40:23,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.125) internal successors, (85), 38 states have internal predecessors, (85), 5 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 08:40:23,645 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 349 transitions. [2022-01-31 08:40:23,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 08:40:23,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:40:23,647 INFO L514 BasicCegarLoop]: trace histogram [6, 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 08:40:23,667 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 08:40:23,851 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 08:40:23,852 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:40:23,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:40:23,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1360907361, now seen corresponding path program 4 times [2022-01-31 08:40:23,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:40:23,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519721009] [2022-01-31 08:40:23,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:40:23,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:40:23,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:40:23,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:40:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:40:23,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:40:23,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:40:23,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 08:40:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:40:24,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 08:40:24,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:40:24,095 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 08:40:24,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:40:24,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519721009] [2022-01-31 08:40:24,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519721009] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:40:24,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870105067] [2022-01-31 08:40:24,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:40:24,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:40:24,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:40:24,096 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 08:40:24,097 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 08:40:24,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:40:24,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:40:24,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-31 08:40:24,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:40:24,531 INFO L353 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2022-01-31 08:40:24,531 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 37 treesize of output 39 [2022-01-31 08:40:24,716 INFO L353 Elim1Store]: treesize reduction 175, result has 7.9 percent of original size [2022-01-31 08:40:24,716 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 46 treesize of output 33 [2022-01-31 08:40:25,286 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:40:25,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:40:48,140 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 88 treesize of output 78 [2022-01-31 08:40:48,164 INFO L353 Elim1Store]: treesize reduction 34, result has 12.8 percent of original size [2022-01-31 08:40:48,164 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 973 treesize of output 915 [2022-01-31 08:40:49,054 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:40:49,054 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 90 treesize of output 88 [2022-01-31 08:40:49,061 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 9 treesize of output 3 [2022-01-31 08:40:49,122 INFO L353 Elim1Store]: treesize reduction 16, result has 80.5 percent of original size [2022-01-31 08:40:49,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 855 treesize of output 857 [2022-01-31 08:40:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 6 proven. 85 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 08:40:55,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870105067] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:40:55,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:40:55,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25, 23] total 60 [2022-01-31 08:40:55,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137239161] [2022-01-31 08:40:55,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:40:55,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 08:40:55,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:40:55,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 08:40:55,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=3186, Unknown=10, NotChecked=0, Total=3540 [2022-01-31 08:40:55,901 INFO L87 Difference]: Start difference. First operand 265 states and 349 transitions. Second operand has 60 states, 56 states have (on average 2.357142857142857) internal successors, (132), 57 states have internal predecessors, (132), 9 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (10), 7 states have call predecessors, (10), 9 states have call successors, (10) [2022-01-31 08:41:00,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:41:00,963 INFO L93 Difference]: Finished difference Result 649 states and 908 transitions. [2022-01-31 08:41:00,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 08:41:00,963 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 56 states have (on average 2.357142857142857) internal successors, (132), 57 states have internal predecessors, (132), 9 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (10), 7 states have call predecessors, (10), 9 states have call successors, (10) Word has length 58 [2022-01-31 08:41:00,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:41:00,966 INFO L225 Difference]: With dead ends: 649 [2022-01-31 08:41:00,966 INFO L226 Difference]: Without dead ends: 646 [2022-01-31 08:41:00,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7182 ImplicationChecksByTransitivity, 27.5s TimeCoverageRelationStatistics Valid=2714, Invalid=20838, Unknown=10, NotChecked=0, Total=23562 [2022-01-31 08:41:00,970 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 407 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 1964 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 3470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 1964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1167 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:41:00,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 416 Invalid, 3470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 1964 Invalid, 0 Unknown, 1167 Unchecked, 1.2s Time] [2022-01-31 08:41:00,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-01-31 08:41:00,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 488. [2022-01-31 08:41:00,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 433 states have (on average 1.2471131639722863) internal successors, (540), 444 states have internal predecessors, (540), 26 states have call successors, (26), 20 states have call predecessors, (26), 28 states have return successors, (129), 23 states have call predecessors, (129), 25 states have call successors, (129) [2022-01-31 08:41:00,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 695 transitions. [2022-01-31 08:41:00,994 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 695 transitions. Word has length 58 [2022-01-31 08:41:00,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:41:00,994 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 695 transitions. [2022-01-31 08:41:00,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 56 states have (on average 2.357142857142857) internal successors, (132), 57 states have internal predecessors, (132), 9 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (10), 7 states have call predecessors, (10), 9 states have call successors, (10) [2022-01-31 08:41:00,995 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 695 transitions. [2022-01-31 08:41:00,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 08:41:00,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:41:00,996 INFO L514 BasicCegarLoop]: trace histogram [6, 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 08:41:01,019 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 08:41:01,213 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 08:41:01,213 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:41:01,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:41:01,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1630275165, now seen corresponding path program 5 times [2022-01-31 08:41:01,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:41:01,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464714323] [2022-01-31 08:41:01,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:41:01,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:41:01,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:41:01,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:41:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:41:01,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:41:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:41:02,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 08:41:02,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:41:02,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 08:41:02,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:41:03,071 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 2 proven. 89 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 08:41:03,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:41:03,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464714323] [2022-01-31 08:41:03,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464714323] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:41:03,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992596205] [2022-01-31 08:41:03,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:41:03,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:41:03,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:41:03,077 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 08:41:03,077 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 08:41:03,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-31 08:41:03,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:41:03,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 94 conjunts are in the unsatisfiable core [2022-01-31 08:41:03,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:41:03,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:41:03,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:41:03,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:41:03,614 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 79 treesize of output 57 [2022-01-31 08:41:04,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:41:04,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:41:04,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:41:04,491 INFO L353 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-01-31 08:41:04,492 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 126 treesize of output 80 [2022-01-31 08:41:04,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:41:04,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:41:04,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:41:04,798 INFO L353 Elim1Store]: treesize reduction 75, result has 20.2 percent of original size [2022-01-31 08:41:04,798 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 138 treesize of output 93 [2022-01-31 08:41:04,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:41:04,986 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:41:04,986 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 41 [2022-01-31 08:41:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 08:41:05,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:41:06,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992596205] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:41:06,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 08:41:06,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 20] total 53 [2022-01-31 08:41:06,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056072611] [2022-01-31 08:41:06,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 08:41:06,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 08:41:06,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:41:06,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 08:41:06,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=3573, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 08:41:06,389 INFO L87 Difference]: Start difference. First operand 488 states and 695 transitions. Second operand has 53 states, 48 states have (on average 1.5625) internal successors, (75), 46 states have internal predecessors, (75), 6 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 08:41:07,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:41:07,852 INFO L93 Difference]: Finished difference Result 580 states and 874 transitions. [2022-01-31 08:41:07,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 08:41:07,852 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 48 states have (on average 1.5625) internal successors, (75), 46 states have internal predecessors, (75), 6 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 58 [2022-01-31 08:41:07,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:41:07,855 INFO L225 Difference]: With dead ends: 580 [2022-01-31 08:41:07,855 INFO L226 Difference]: Without dead ends: 578 [2022-01-31 08:41:07,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=402, Invalid=6078, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 08:41:07,856 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:41:07,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 502 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 540 Invalid, 0 Unknown, 393 Unchecked, 0.3s Time] [2022-01-31 08:41:07,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-01-31 08:41:07,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 516. [2022-01-31 08:41:07,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 456 states have (on average 1.2478070175438596) internal successors, (569), 469 states have internal predecessors, (569), 29 states have call successors, (29), 20 states have call predecessors, (29), 30 states have return successors, (147), 26 states have call predecessors, (147), 28 states have call successors, (147) [2022-01-31 08:41:07,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 745 transitions. [2022-01-31 08:41:07,878 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 745 transitions. Word has length 58 [2022-01-31 08:41:07,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:41:07,879 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 745 transitions. [2022-01-31 08:41:07,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 48 states have (on average 1.5625) internal successors, (75), 46 states have internal predecessors, (75), 6 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 08:41:07,879 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 745 transitions. [2022-01-31 08:41:07,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 08:41:07,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:41:07,881 INFO L514 BasicCegarLoop]: trace histogram [6, 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 08:41:07,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 08:41:08,083 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 08:41:08,083 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:41:08,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:41:08,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1775076929, now seen corresponding path program 6 times [2022-01-31 08:41:08,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:41:08,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161076108] [2022-01-31 08:41:08,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:41:08,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:41:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:41:08,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:41:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:41:08,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:41:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:41:08,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 08:41:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:41:08,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 08:41:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:41:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 24 proven. 59 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-31 08:41:08,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:41:08,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161076108] [2022-01-31 08:41:08,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161076108] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:41:08,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146432781] [2022-01-31 08:41:08,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 08:41:08,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:41:08,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:41:08,642 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 08:41:08,642 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 08:41:08,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-31 08:41:08,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:41:08,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 56 conjunts are in the unsatisfiable core [2022-01-31 08:41:08,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:41:09,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:41:09,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:41:09,021 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 46 treesize of output 26 [2022-01-31 08:41:09,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:41:09,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:41:09,250 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 41 treesize of output 26 [2022-01-31 08:41:09,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:41:09,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:41:09,318 INFO L353 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2022-01-31 08:41:09,318 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 39 treesize of output 41 [2022-01-31 08:41:10,057 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 4 proven. 84 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:41:10,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:41:10,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146432781] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:41:10,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 08:41:10,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 45 [2022-01-31 08:41:10,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566085281] [2022-01-31 08:41:10,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 08:41:10,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 08:41:10,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:41:10,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 08:41:10,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1882, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 08:41:10,171 INFO L87 Difference]: Start difference. First operand 516 states and 745 transitions. Second operand has 45 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 41 states have internal predecessors, (84), 6 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 08:41:13,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:41:13,470 INFO L93 Difference]: Finished difference Result 974 states and 1332 transitions. [2022-01-31 08:41:13,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 08:41:13,470 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 41 states have internal predecessors, (84), 6 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 58 [2022-01-31 08:41:13,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:41:13,474 INFO L225 Difference]: With dead ends: 974 [2022-01-31 08:41:13,474 INFO L226 Difference]: Without dead ends: 968 [2022-01-31 08:41:13,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 48 SyntacticMatches, 7 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4518 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1262, Invalid=11848, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 08:41:13,475 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 199 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 2867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1680 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 08:41:13,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 224 Invalid, 2867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1069 Invalid, 0 Unknown, 1680 Unchecked, 0.6s Time] [2022-01-31 08:41:13,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2022-01-31 08:41:13,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 729. [2022-01-31 08:41:13,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 647 states have (on average 1.2380216383307574) internal successors, (801), 664 states have internal predecessors, (801), 37 states have call successors, (37), 28 states have call predecessors, (37), 44 states have return successors, (180), 36 states have call predecessors, (180), 36 states have call successors, (180) [2022-01-31 08:41:13,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1018 transitions. [2022-01-31 08:41:13,497 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1018 transitions. Word has length 58 [2022-01-31 08:41:13,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:41:13,497 INFO L470 AbstractCegarLoop]: Abstraction has 729 states and 1018 transitions. [2022-01-31 08:41:13,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 41 states have internal predecessors, (84), 6 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 08:41:13,497 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1018 transitions. [2022-01-31 08:41:13,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 08:41:13,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:41:13,500 INFO L514 BasicCegarLoop]: trace histogram [6, 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 08:41:13,521 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 08:41:13,721 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 08:41:13,722 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:41:13,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:41:13,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1971590434, now seen corresponding path program 7 times [2022-01-31 08:41:13,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:41:13,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818826173] [2022-01-31 08:41:13,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:41:13,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:41:13,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat