/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-tiling/mbpr3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:49:03,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:49:03,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:49:03,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 08:49:03,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 08:49:03,864 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 08:49:03,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 08:49:03,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 08:49:03,872 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 08:49:03,876 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 08:49:03,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 08:49:03,877 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 08:49:03,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:49:03,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:49:03,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:49:03,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:49:03,883 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:49:03,884 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:49:03,885 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:49:03,886 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:49:03,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:49:03,888 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:49:03,889 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:49:03,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:49:03,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 08:49:03,895 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 08:49:03,895 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 08:49:03,896 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 08:49:03,896 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 08:49:03,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 08:49:03,897 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 08:49:03,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 08:49:03,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 08:49:03,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 08:49:03,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 08:49:03,900 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 08:49:03,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 08:49:03,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 08:49:03,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:49:03,901 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:49:03,902 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:49:03,904 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:49:03,914 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:49:03,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:49:03,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:49:03,915 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:49:03,916 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:49:03,916 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:49:03,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:49:03,916 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:49:03,916 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:49:03,916 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:49:03,916 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:49:03,917 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:49:03,917 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:49:03,917 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:49:03,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:49:03,917 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:49:03,917 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:49:03,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:49:03,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:49:03,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:49:03,917 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:49:03,918 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:49:03,918 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:49:04,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:49:04,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:49:04,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:49:04,133 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:49:04,133 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:49:04,134 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr3.c [2022-01-31 08:49:04,175 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/602d742cd/77b9b814630f49429d81f8621a1d100b/FLAG2f3e39405 [2022-01-31 08:49:04,479 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:49:04,481 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr3.c [2022-01-31 08:49:04,488 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/602d742cd/77b9b814630f49429d81f8621a1d100b/FLAG2f3e39405 [2022-01-31 08:49:04,904 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/602d742cd/77b9b814630f49429d81f8621a1d100b [2022-01-31 08:49:04,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:49:04,908 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:49:04,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:49:04,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:49:04,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:49:04,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:49:04" (1/1) ... [2022-01-31 08:49:04,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29df5091 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:49:04, skipping insertion in model container [2022-01-31 08:49:04,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:49:04" (1/1) ... [2022-01-31 08:49:04,921 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:49:04,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:49:05,080 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr3.c[396,409] [2022-01-31 08:49:05,124 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:49:05,131 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:49:05,141 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr3.c[396,409] [2022-01-31 08:49:05,157 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:49:05,166 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:49:05,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:49:05 WrapperNode [2022-01-31 08:49:05,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:49:05,167 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:49:05,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:49:05,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:49:05,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:49:05" (1/1) ... [2022-01-31 08:49:05,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:49:05" (1/1) ... [2022-01-31 08:49:05,200 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:49:05" (1/1) ... [2022-01-31 08:49:05,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:49:05" (1/1) ... [2022-01-31 08:49:05,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:49:05" (1/1) ... [2022-01-31 08:49:05,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:49:05" (1/1) ... [2022-01-31 08:49:05,211 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:49:05" (1/1) ... [2022-01-31 08:49:05,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:49:05,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:49:05,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:49:05,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:49:05,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:49:05" (1/1) ... [2022-01-31 08:49:05,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:49:05,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:49:05,252 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 08:49:05,269 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 08:49:05,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:49:05,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:49:05,319 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:49:05,319 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 08:49:05,319 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 08:49:05,319 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:49:05,320 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:49:05,320 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:49:05,320 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:49:05,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:49:05,321 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 08:49:05,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 08:49:05,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 08:49:05,321 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:49:05,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:49:05,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:49:05,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:49:05,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:49:05,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:49:05,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:49:05,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:49:05,392 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:49:05,393 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:49:05,617 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:49:05,622 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:49:05,622 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-31 08:49:05,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:49:05 BoogieIcfgContainer [2022-01-31 08:49:05,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:49:05,624 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:49:05,624 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:49:05,630 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:49:05,632 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:49:05" (1/1) ... [2022-01-31 08:49:05,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:49:05 BasicIcfg [2022-01-31 08:49:05,664 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:49:05,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:49:05,665 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:49:05,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:49:05,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:49:04" (1/4) ... [2022-01-31 08:49:05,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ccb603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:49:05, skipping insertion in model container [2022-01-31 08:49:05,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:49:05" (2/4) ... [2022-01-31 08:49:05,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ccb603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:49:05, skipping insertion in model container [2022-01-31 08:49:05,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:49:05" (3/4) ... [2022-01-31 08:49:05,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ccb603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:49:05, skipping insertion in model container [2022-01-31 08:49:05,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:49:05" (4/4) ... [2022-01-31 08:49:05,671 INFO L111 eAbstractionObserver]: Analyzing ICFG mbpr3.cJordan [2022-01-31 08:49:05,675 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:49:05,675 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:49:05,713 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:49:05,717 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 08:49:05,718 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:49:05,726 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 37 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:49:05,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 08:49:05,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:05,732 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:05,732 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:05,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:05,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1095244714, now seen corresponding path program 1 times [2022-01-31 08:49:05,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:05,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776877080] [2022-01-31 08:49:05,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:05,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:05,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:05,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:05,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:49:05,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:05,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776877080] [2022-01-31 08:49:05,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776877080] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:49:05,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:49:05,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 08:49:05,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585881074] [2022-01-31 08:49:05,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:49:05,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:49:05,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:05,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:49:05,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:49:05,951 INFO L87 Difference]: Start difference. First operand has 46 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 37 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:49:06,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:06,015 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2022-01-31 08:49:06,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:49:06,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-01-31 08:49:06,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:06,022 INFO L225 Difference]: With dead ends: 46 [2022-01-31 08:49:06,022 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 08:49:06,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 08:49:06,026 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:06,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 59 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:49:06,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 08:49:06,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-01-31 08:49:06,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:49:06,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2022-01-31 08:49:06,051 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 26 [2022-01-31 08:49:06,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:06,051 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2022-01-31 08:49:06,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:49:06,052 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2022-01-31 08:49:06,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 08:49:06,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:06,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:06,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:49:06,053 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:06,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:06,053 INFO L85 PathProgramCache]: Analyzing trace with hash -2034877210, now seen corresponding path program 1 times [2022-01-31 08:49:06,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:06,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835102931] [2022-01-31 08:49:06,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:06,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:06,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:06,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:06,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:49:06,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:06,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835102931] [2022-01-31 08:49:06,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835102931] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:49:06,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:49:06,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 08:49:06,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659046812] [2022-01-31 08:49:06,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:49:06,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 08:49:06,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:06,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 08:49:06,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:49:06,190 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:49:06,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:06,327 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2022-01-31 08:49:06,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:49:06,328 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-01-31 08:49:06,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:06,331 INFO L225 Difference]: With dead ends: 46 [2022-01-31 08:49:06,331 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 08:49:06,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-31 08:49:06,332 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 17 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:06,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 150 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:49:06,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 08:49:06,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-01-31 08:49:06,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 36 states have internal predecessors, (43), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:49:06,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-01-31 08:49:06,342 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 26 [2022-01-31 08:49:06,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:06,342 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-01-31 08:49:06,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:49:06,343 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-01-31 08:49:06,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 08:49:06,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:06,343 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:06,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 08:49:06,344 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:06,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:06,344 INFO L85 PathProgramCache]: Analyzing trace with hash -2033953689, now seen corresponding path program 1 times [2022-01-31 08:49:06,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:06,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059048834] [2022-01-31 08:49:06,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:06,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:06,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:06,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:06,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:06,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:06,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:49:06,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:06,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059048834] [2022-01-31 08:49:06,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059048834] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:49:06,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:49:06,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 08:49:06,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013872793] [2022-01-31 08:49:06,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:49:06,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 08:49:06,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:06,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 08:49:06,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:49:06,527 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:49:06,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:06,654 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-01-31 08:49:06,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:49:06,654 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-01-31 08:49:06,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:06,657 INFO L225 Difference]: With dead ends: 57 [2022-01-31 08:49:06,657 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 08:49:06,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 08:49:06,664 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 103 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:06,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 33 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:49:06,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 08:49:06,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2022-01-31 08:49:06,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 39 states have internal predecessors, (46), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:49:06,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-01-31 08:49:06,680 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 26 [2022-01-31 08:49:06,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:06,681 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-01-31 08:49:06,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:49:06,681 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-01-31 08:49:06,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 08:49:06,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:06,682 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:06,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 08:49:06,682 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:06,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:06,683 INFO L85 PathProgramCache]: Analyzing trace with hash 154119421, now seen corresponding path program 1 times [2022-01-31 08:49:06,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:06,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700933744] [2022-01-31 08:49:06,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:06,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:06,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:06,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:06,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:06,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:49:06,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:06,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700933744] [2022-01-31 08:49:06,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700933744] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:49:06,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:49:06,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 08:49:06,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774136347] [2022-01-31 08:49:06,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:49:06,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 08:49:06,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:06,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 08:49:06,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:49:06,812 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:49:06,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:06,864 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-01-31 08:49:06,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 08:49:06,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2022-01-31 08:49:06,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:06,867 INFO L225 Difference]: With dead ends: 48 [2022-01-31 08:49:06,867 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 08:49:06,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:49:06,875 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:06,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 49 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:49:06,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 08:49:06,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-01-31 08:49:06,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 39 states have internal predecessors, (45), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:49:06,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-01-31 08:49:06,886 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 38 [2022-01-31 08:49:06,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:06,887 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-01-31 08:49:06,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:49:06,887 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-01-31 08:49:06,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 08:49:06,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:06,888 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:06,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 08:49:06,888 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:06,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:06,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1642831938, now seen corresponding path program 1 times [2022-01-31 08:49:06,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:06,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59437565] [2022-01-31 08:49:06,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:06,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:06,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:07,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:07,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:07,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:07,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:49:07,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:07,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59437565] [2022-01-31 08:49:07,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59437565] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:49:07,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110349388] [2022-01-31 08:49:07,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:07,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:07,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:49:07,371 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 08:49:07,395 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 08:49:07,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:07,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-31 08:49:07,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:49:07,627 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 08:49:07,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:07,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:07,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:07,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-01-31 08:49:07,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:07,744 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 29 treesize of output 28 [2022-01-31 08:49:07,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:07,766 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 28 treesize of output 20 [2022-01-31 08:49:07,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:07,814 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 29 treesize of output 28 [2022-01-31 08:49:07,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 37 [2022-01-31 08:49:07,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:07,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:07,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 28 treesize of output 23 [2022-01-31 08:49:07,894 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 15 treesize of output 7 [2022-01-31 08:49:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:49:07,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:49:08,128 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 15 treesize of output 13 [2022-01-31 08:49:08,131 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 26 [2022-01-31 08:49:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:49:08,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110349388] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:49:08,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:49:08,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2022-01-31 08:49:08,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357137534] [2022-01-31 08:49:08,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:49:08,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 08:49:08,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:08,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 08:49:08,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-01-31 08:49:08,193 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 18 states have internal predecessors, (78), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:49:08,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:08,530 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2022-01-31 08:49:08,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 08:49:08,531 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 18 states have internal predecessors, (78), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2022-01-31 08:49:08,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:08,532 INFO L225 Difference]: With dead ends: 72 [2022-01-31 08:49:08,532 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 08:49:08,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 70 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2022-01-31 08:49:08,533 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 79 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:08,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 133 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:49:08,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 08:49:08,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2022-01-31 08:49:08,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.15) internal successors, (46), 41 states have internal predecessors, (46), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:49:08,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2022-01-31 08:49:08,538 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 38 [2022-01-31 08:49:08,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:08,538 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2022-01-31 08:49:08,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 18 states have internal predecessors, (78), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:49:08,539 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2022-01-31 08:49:08,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 08:49:08,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:08,539 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:08,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 08:49:08,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:08,758 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:08,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:08,758 INFO L85 PathProgramCache]: Analyzing trace with hash 843661070, now seen corresponding path program 1 times [2022-01-31 08:49:08,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:08,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667323716] [2022-01-31 08:49:08,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:08,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:08,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:08,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:08,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:08,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:08,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:08,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 08:49:08,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:49:08,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:08,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667323716] [2022-01-31 08:49:08,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667323716] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:49:08,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922206563] [2022-01-31 08:49:08,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:08,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:08,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:49:08,952 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 08:49:08,990 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 08:49:09,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:09,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 08:49:09,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:49:09,129 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 08:49:09,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:09,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:09,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:09,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-01-31 08:49:09,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:09,234 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 29 treesize of output 28 [2022-01-31 08:49:09,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:09,255 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 35 treesize of output 23 [2022-01-31 08:49:09,378 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 15 treesize of output 7 [2022-01-31 08:49:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:49:09,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:49:09,536 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 17 treesize of output 15 [2022-01-31 08:49:09,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-01-31 08:49:09,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:49:09,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922206563] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:49:09,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:49:09,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 21 [2022-01-31 08:49:09,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422000691] [2022-01-31 08:49:09,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:49:09,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 08:49:09,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:09,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 08:49:09,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-31 08:49:09,610 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 21 states, 21 states have (on average 4.523809523809524) internal successors, (95), 20 states have internal predecessors, (95), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 08:49:09,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:09,992 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2022-01-31 08:49:09,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 08:49:09,993 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.523809523809524) internal successors, (95), 20 states have internal predecessors, (95), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 47 [2022-01-31 08:49:09,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:09,994 INFO L225 Difference]: With dead ends: 72 [2022-01-31 08:49:09,994 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 08:49:09,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 91 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 08:49:09,995 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 105 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:09,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 148 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 302 Invalid, 0 Unknown, 43 Unchecked, 0.2s Time] [2022-01-31 08:49:09,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 08:49:09,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2022-01-31 08:49:09,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 48 states have internal predecessors, (52), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 08:49:09,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2022-01-31 08:49:09,998 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 47 [2022-01-31 08:49:09,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:09,999 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2022-01-31 08:49:09,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.523809523809524) internal successors, (95), 20 states have internal predecessors, (95), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 08:49:09,999 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2022-01-31 08:49:09,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 08:49:09,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:10,000 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:10,033 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 08:49:10,233 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,SelfDestructingSolverStorable5 [2022-01-31 08:49:10,233 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:10,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:10,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1762826686, now seen corresponding path program 2 times [2022-01-31 08:49:10,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:10,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058833056] [2022-01-31 08:49:10,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:10,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:10,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:10,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:10,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 08:49:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:10,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 08:49:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:49:10,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:10,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058833056] [2022-01-31 08:49:10,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058833056] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:49:10,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494193440] [2022-01-31 08:49:10,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:49:10,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:10,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:49:10,379 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 08:49:10,381 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 08:49:10,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:49:10,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:49:10,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 08:49:10,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:49:10,474 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 08:49:10,503 INFO L353 Elim1Store]: treesize reduction 86, result has 18.1 percent of original size [2022-01-31 08:49:10,503 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 4 case distinctions, treesize of input 32 treesize of output 29 [2022-01-31 08:49:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:49:10,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:49:13,394 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 17 treesize of output 15 [2022-01-31 08:49:13,395 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 30 treesize of output 26 [2022-01-31 08:49:13,431 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:49:13,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494193440] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:49:13,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:49:13,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 23 [2022-01-31 08:49:13,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575053267] [2022-01-31 08:49:13,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:49:13,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 08:49:13,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:13,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 08:49:13,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=422, Unknown=3, NotChecked=0, Total=506 [2022-01-31 08:49:13,433 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 23 states, 22 states have (on average 4.2272727272727275) internal successors, (93), 20 states have internal predecessors, (93), 9 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-01-31 08:49:14,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:14,156 INFO L93 Difference]: Finished difference Result 119 states and 133 transitions. [2022-01-31 08:49:14,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 08:49:14,156 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.2272727272727275) internal successors, (93), 20 states have internal predecessors, (93), 9 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 56 [2022-01-31 08:49:14,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:14,157 INFO L225 Difference]: With dead ends: 119 [2022-01-31 08:49:14,157 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 08:49:14,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 103 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=161, Invalid=891, Unknown=4, NotChecked=0, Total=1056 [2022-01-31 08:49:14,158 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 83 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:14,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 305 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 468 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-01-31 08:49:14,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 08:49:14,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 91. [2022-01-31 08:49:14,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 75 states have internal predecessors, (82), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 08:49:14,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2022-01-31 08:49:14,163 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 56 [2022-01-31 08:49:14,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:14,163 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2022-01-31 08:49:14,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.2272727272727275) internal successors, (93), 20 states have internal predecessors, (93), 9 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-01-31 08:49:14,163 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2022-01-31 08:49:14,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 08:49:14,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:14,164 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:14,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-31 08:49:14,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:14,390 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:14,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:14,391 INFO L85 PathProgramCache]: Analyzing trace with hash -2001976050, now seen corresponding path program 3 times [2022-01-31 08:49:14,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:14,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571054551] [2022-01-31 08:49:14,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:14,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:14,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:14,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:14,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:14,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:14,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 08:49:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:14,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 08:49:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:14,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 08:49:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:14,627 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 08:49:14,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:14,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571054551] [2022-01-31 08:49:14,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571054551] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:49:14,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077348475] [2022-01-31 08:49:14,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:49:14,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:14,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:49:14,629 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:49:14,643 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 08:49:14,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 08:49:14,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:49:14,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 08:49:14,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:49:15,188 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 08:49:15,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:49:15,384 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 08:49:15,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077348475] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:49:15,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:49:15,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 29 [2022-01-31 08:49:15,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004604919] [2022-01-31 08:49:15,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:49:15,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 08:49:15,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:15,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 08:49:15,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2022-01-31 08:49:15,386 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 29 states, 29 states have (on average 4.241379310344827) internal successors, (123), 28 states have internal predecessors, (123), 14 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-01-31 08:49:15,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:15,793 INFO L93 Difference]: Finished difference Result 154 states and 165 transitions. [2022-01-31 08:49:15,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 08:49:15,793 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.241379310344827) internal successors, (123), 28 states have internal predecessors, (123), 14 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 65 [2022-01-31 08:49:15,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:15,794 INFO L225 Difference]: With dead ends: 154 [2022-01-31 08:49:15,794 INFO L226 Difference]: Without dead ends: 108 [2022-01-31 08:49:15,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=318, Invalid=1088, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 08:49:15,795 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 342 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:15,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 110 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 08:49:15,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-31 08:49:15,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 99. [2022-01-31 08:49:15,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 82 states have (on average 1.0853658536585367) internal successors, (89), 83 states have internal predecessors, (89), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 08:49:15,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 106 transitions. [2022-01-31 08:49:15,800 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 106 transitions. Word has length 65 [2022-01-31 08:49:15,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:15,800 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 106 transitions. [2022-01-31 08:49:15,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.241379310344827) internal successors, (123), 28 states have internal predecessors, (123), 14 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-01-31 08:49:15,800 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 106 transitions. [2022-01-31 08:49:15,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 08:49:15,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:15,801 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 08:49:15,820 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 08:49:16,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:16,016 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:16,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:16,016 INFO L85 PathProgramCache]: Analyzing trace with hash -133257731, now seen corresponding path program 4 times [2022-01-31 08:49:16,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:16,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509778981] [2022-01-31 08:49:16,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:16,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:16,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:16,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:16,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 08:49:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:16,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 08:49:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-31 08:49:16,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:16,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509778981] [2022-01-31 08:49:16,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509778981] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:49:16,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319216011] [2022-01-31 08:49:16,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:49:16,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:16,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:49:16,281 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 08:49:16,282 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 08:49:16,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:49:16,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:49:16,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 08:49:16,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:49:16,615 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 08:49:16,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:49:16,962 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-31 08:49:16,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319216011] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:49:16,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:49:16,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 23 [2022-01-31 08:49:16,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461563623] [2022-01-31 08:49:16,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:49:16,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 08:49:16,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:16,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 08:49:16,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2022-01-31 08:49:16,964 INFO L87 Difference]: Start difference. First operand 99 states and 106 transitions. Second operand has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 22 states have internal predecessors, (100), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 08:49:17,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:17,385 INFO L93 Difference]: Finished difference Result 166 states and 181 transitions. [2022-01-31 08:49:17,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 08:49:17,385 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 22 states have internal predecessors, (100), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 72 [2022-01-31 08:49:17,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:17,386 INFO L225 Difference]: With dead ends: 166 [2022-01-31 08:49:17,386 INFO L226 Difference]: Without dead ends: 166 [2022-01-31 08:49:17,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 141 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=1000, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 08:49:17,387 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 295 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:17,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 72 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 08:49:17,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-01-31 08:49:17,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 141. [2022-01-31 08:49:17,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 120 states have (on average 1.0916666666666666) internal successors, (131), 122 states have internal predecessors, (131), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 08:49:17,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 152 transitions. [2022-01-31 08:49:17,393 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 152 transitions. Word has length 72 [2022-01-31 08:49:17,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:17,394 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 152 transitions. [2022-01-31 08:49:17,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 22 states have internal predecessors, (100), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 08:49:17,394 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 152 transitions. [2022-01-31 08:49:17,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 08:49:17,394 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:17,395 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 08:49:17,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 08:49:17,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:17,595 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:17,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:17,596 INFO L85 PathProgramCache]: Analyzing trace with hash 313497047, now seen corresponding path program 5 times [2022-01-31 08:49:17,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:17,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800233902] [2022-01-31 08:49:17,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:17,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:18,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:18,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:18,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:18,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 08:49:18,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:18,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 08:49:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:18,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 08:49:18,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:18,166 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 38 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 08:49:18,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:18,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800233902] [2022-01-31 08:49:18,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800233902] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:49:18,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969492789] [2022-01-31 08:49:18,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:49:18,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:18,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:49:18,176 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 08:49:18,178 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 08:49:18,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-31 08:49:18,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:49:18,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-31 08:49:18,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:49:18,573 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 08:49:18,616 INFO L353 Elim1Store]: treesize reduction 135, result has 15.6 percent of original size [2022-01-31 08:49:18,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 40 [2022-01-31 08:49:18,663 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:49:18,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:49:18,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 58 [2022-01-31 08:49:18,711 INFO L353 Elim1Store]: treesize reduction 264, result has 11.7 percent of original size [2022-01-31 08:49:18,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 108 treesize of output 98 [2022-01-31 08:49:18,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:18,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:18,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:18,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 28 [2022-01-31 08:49:18,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 08:49:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 26 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-31 08:49:18,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:49:21,597 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_96 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_96)) (forall ((v_ArrVal_390 Int)) (< (select (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (* v_main_~i~0_96 12) (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_390) (+ 8 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0)))) is different from false [2022-01-31 08:49:21,702 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 41 treesize of output 39 [2022-01-31 08:49:21,717 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 27880 treesize of output 27624