/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/loops/vogal-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 12:15:07,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 12:15:07,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 12:15:07,888 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 12:15:07,889 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 12:15:07,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 12:15:07,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 12:15:07,897 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 12:15:07,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 12:15:07,902 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 12:15:07,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 12:15:07,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 12:15:07,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 12:15:07,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 12:15:07,907 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 12:15:07,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 12:15:07,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 12:15:07,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 12:15:07,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 12:15:07,916 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 12:15:07,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 12:15:07,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 12:15:07,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 12:15:07,919 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 12:15:07,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 12:15:07,924 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 12:15:07,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 12:15:07,926 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 12:15:07,926 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 12:15:07,927 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 12:15:07,927 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 12:15:07,927 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 12:15:07,929 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 12:15:07,929 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 12:15:07,930 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 12:15:07,930 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 12:15:07,931 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 12:15:07,931 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 12:15:07,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 12:15:07,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 12:15:07,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 12:15:07,933 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 12:15:07,945 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 12:15:07,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 12:15:07,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 12:15:07,947 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 12:15:07,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 12:15:07,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 12:15:07,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 12:15:07,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 12:15:07,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 12:15:07,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 12:15:07,948 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 12:15:07,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 12:15:07,948 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 12:15:07,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 12:15:07,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 12:15:07,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 12:15:07,949 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 12:15:07,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 12:15:07,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 12:15:07,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 12:15:07,949 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 12:15:07,950 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 12:15:07,950 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 12:15:08,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 12:15:08,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 12:15:08,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 12:15:08,209 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 12:15:08,210 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 12:15:08,211 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-2.i [2022-01-31 12:15:08,261 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/623db392e/d6b84ae7ad1e4cc19f9b12f094c03e93/FLAG0afa23683 [2022-01-31 12:15:08,644 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 12:15:08,644 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i [2022-01-31 12:15:08,652 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/623db392e/d6b84ae7ad1e4cc19f9b12f094c03e93/FLAG0afa23683 [2022-01-31 12:15:08,667 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/623db392e/d6b84ae7ad1e4cc19f9b12f094c03e93 [2022-01-31 12:15:08,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 12:15:08,670 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 12:15:08,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 12:15:08,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 12:15:08,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 12:15:08,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:15:08" (1/1) ... [2022-01-31 12:15:08,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7da38b49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:15:08, skipping insertion in model container [2022-01-31 12:15:08,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:15:08" (1/1) ... [2022-01-31 12:15:08,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 12:15:08,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 12:15:08,880 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i[808,821] [2022-01-31 12:15:08,931 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 12:15:08,942 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 12:15:08,960 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i[808,821] [2022-01-31 12:15:09,010 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 12:15:09,020 INFO L208 MainTranslator]: Completed translation [2022-01-31 12:15:09,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:15:09 WrapperNode [2022-01-31 12:15:09,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 12:15:09,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 12:15:09,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 12:15:09,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 12:15:09,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:15:09" (1/1) ... [2022-01-31 12:15:09,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:15:09" (1/1) ... [2022-01-31 12:15:09,072 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:15:09" (1/1) ... [2022-01-31 12:15:09,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:15:09" (1/1) ... [2022-01-31 12:15:09,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:15:09" (1/1) ... [2022-01-31 12:15:09,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:15:09" (1/1) ... [2022-01-31 12:15:09,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:15:09" (1/1) ... [2022-01-31 12:15:09,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 12:15:09,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 12:15:09,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 12:15:09,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 12:15:09,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:15:09" (1/1) ... [2022-01-31 12:15:09,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 12:15:09,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:15:09,194 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 12:15:09,196 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 12:15:09,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 12:15:09,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 12:15:09,265 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 12:15:09,265 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 12:15:09,266 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 12:15:09,266 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 12:15:09,266 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 12:15:09,267 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 12:15:09,267 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 12:15:09,267 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 12:15:09,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 12:15:09,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 12:15:09,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-01-31 12:15:09,268 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 12:15:09,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 12:15:09,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 12:15:09,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 12:15:09,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 12:15:09,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 12:15:09,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 12:15:09,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 12:15:09,337 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 12:15:09,338 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 12:15:09,519 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 12:15:09,525 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 12:15:09,525 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-01-31 12:15:09,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:15:09 BoogieIcfgContainer [2022-01-31 12:15:09,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 12:15:09,528 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 12:15:09,528 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 12:15:09,529 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 12:15:09,538 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:15:09" (1/1) ... [2022-01-31 12:15:09,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 12:15:09 BasicIcfg [2022-01-31 12:15:09,560 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 12:15:09,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 12:15:09,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 12:15:09,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 12:15:09,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 12:15:08" (1/4) ... [2022-01-31 12:15:09,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b10dea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:15:09, skipping insertion in model container [2022-01-31 12:15:09,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:15:09" (2/4) ... [2022-01-31 12:15:09,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b10dea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:15:09, skipping insertion in model container [2022-01-31 12:15:09,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:15:09" (3/4) ... [2022-01-31 12:15:09,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b10dea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 12:15:09, skipping insertion in model container [2022-01-31 12:15:09,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 12:15:09" (4/4) ... [2022-01-31 12:15:09,579 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-2.iJordan [2022-01-31 12:15:09,583 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 12:15:09,583 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 12:15:09,643 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 12:15:09,657 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 12:15:09,657 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 12:15:09,676 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 12:15:09,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 12:15:09,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:15:09,683 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:15:09,684 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:15:09,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:15:09,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1974064059, now seen corresponding path program 1 times [2022-01-31 12:15:09,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:15:09,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068100401] [2022-01-31 12:15:09,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:15:09,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:15:09,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:09,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:15:09,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:09,836 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 12:15:09,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:15:09,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068100401] [2022-01-31 12:15:09,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068100401] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:15:09,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 12:15:09,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 12:15:09,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069469798] [2022-01-31 12:15:09,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:15:09,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 12:15:09,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:15:09,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 12:15:09,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 12:15:09,866 INFO L87 Difference]: Start difference. First operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:09,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:15:09,910 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-01-31 12:15:09,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 12:15:09,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-01-31 12:15:09,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:15:09,919 INFO L225 Difference]: With dead ends: 36 [2022-01-31 12:15:09,919 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 12:15:09,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 12:15:09,923 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 12:15:09,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 45 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 12:15:09,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 12:15:09,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-31 12:15:09,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:09,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-01-31 12:15:09,949 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2022-01-31 12:15:09,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:15:09,949 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-01-31 12:15:09,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:09,950 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-01-31 12:15:09,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 12:15:09,950 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:15:09,950 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:15:09,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 12:15:09,951 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:15:09,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:15:09,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1576298534, now seen corresponding path program 1 times [2022-01-31 12:15:09,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:15:09,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381395674] [2022-01-31 12:15:09,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:15:09,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:15:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:10,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:15:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:10,033 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 12:15:10,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:15:10,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381395674] [2022-01-31 12:15:10,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381395674] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:15:10,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 12:15:10,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 12:15:10,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721760641] [2022-01-31 12:15:10,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:15:10,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 12:15:10,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:15:10,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 12:15:10,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 12:15:10,037 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:10,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:15:10,106 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2022-01-31 12:15:10,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 12:15:10,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 12:15:10,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:15:10,108 INFO L225 Difference]: With dead ends: 44 [2022-01-31 12:15:10,108 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 12:15:10,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 12:15:10,110 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 12:15:10,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 34 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 12:15:10,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 12:15:10,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2022-01-31 12:15:10,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:10,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-01-31 12:15:10,116 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2022-01-31 12:15:10,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:15:10,116 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-01-31 12:15:10,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:10,117 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-01-31 12:15:10,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 12:15:10,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:15:10,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:15:10,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 12:15:10,118 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:15:10,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:15:10,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1150961380, now seen corresponding path program 1 times [2022-01-31 12:15:10,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:15:10,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948418787] [2022-01-31 12:15:10,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:15:10,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:15:10,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:10,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:15:10,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:15:10,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:15:10,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948418787] [2022-01-31 12:15:10,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948418787] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:15:10,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382909824] [2022-01-31 12:15:10,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:15:10,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:15:10,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:15:10,230 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 12:15:10,232 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 12:15:10,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:10,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 12:15:10,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:15:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 12:15:10,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 12:15:10,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382909824] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:15:10,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 12:15:10,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-01-31 12:15:10,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850420915] [2022-01-31 12:15:10,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:15:10,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 12:15:10,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:15:10,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 12:15:10,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-31 12:15:10,415 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:10,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:15:10,438 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2022-01-31 12:15:10,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 12:15:10,438 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-01-31 12:15:10,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:15:10,439 INFO L225 Difference]: With dead ends: 52 [2022-01-31 12:15:10,439 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 12:15:10,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-31 12:15:10,441 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 30 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 12:15:10,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 150 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 12:15:10,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 12:15:10,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2022-01-31 12:15:10,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:10,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2022-01-31 12:15:10,446 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 21 [2022-01-31 12:15:10,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:15:10,446 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2022-01-31 12:15:10,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:10,446 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2022-01-31 12:15:10,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 12:15:10,447 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:15:10,447 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] [2022-01-31 12:15:10,472 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 12:15:10,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:15:10,670 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:15:10,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:15:10,671 INFO L85 PathProgramCache]: Analyzing trace with hash 452661009, now seen corresponding path program 1 times [2022-01-31 12:15:10,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:15:10,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894026462] [2022-01-31 12:15:10,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:15:10,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:15:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:10,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:15:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:10,768 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 12:15:10,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:15:10,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894026462] [2022-01-31 12:15:10,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894026462] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:15:10,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461996469] [2022-01-31 12:15:10,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:15:10,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:15:10,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:15:10,771 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 12:15:10,814 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 12:15:10,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:10,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 12:15:10,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:15:10,936 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 12:15:10,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 12:15:10,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461996469] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:15:10,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 12:15:10,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-01-31 12:15:10,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319224148] [2022-01-31 12:15:10,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:15:10,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 12:15:10,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:15:10,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 12:15:10,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-31 12:15:10,939 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:10,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:15:10,959 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2022-01-31 12:15:10,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 12:15:10,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 12:15:10,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:15:10,960 INFO L225 Difference]: With dead ends: 70 [2022-01-31 12:15:10,960 INFO L226 Difference]: Without dead ends: 70 [2022-01-31 12:15:10,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-31 12:15:10,961 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 12:15:10,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 67 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 12:15:10,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-31 12:15:10,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2022-01-31 12:15:10,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:10,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2022-01-31 12:15:10,979 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 27 [2022-01-31 12:15:10,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:15:10,979 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2022-01-31 12:15:10,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:10,979 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2022-01-31 12:15:10,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 12:15:10,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:15:10,980 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 12:15:11,042 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 12:15:11,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 12:15:11,191 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:15:11,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:15:11,192 INFO L85 PathProgramCache]: Analyzing trace with hash -302875202, now seen corresponding path program 1 times [2022-01-31 12:15:11,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:15:11,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437857662] [2022-01-31 12:15:11,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:15:11,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:15:11,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:11,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:15:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:11,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 12:15:11,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:15:11,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437857662] [2022-01-31 12:15:11,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437857662] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:15:11,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098248533] [2022-01-31 12:15:11,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:15:11,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:15:11,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:15:11,265 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 12:15:11,266 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 12:15:11,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:11,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 12:15:11,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:15:11,445 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 12:15:11,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 12:15:11,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:15:11,580 INFO L353 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-01-31 12:15:11,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 31 [2022-01-31 12:15:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 12:15:11,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098248533] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 12:15:11,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-31 12:15:11,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 9] total 16 [2022-01-31 12:15:11,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680721191] [2022-01-31 12:15:11,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:15:11,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 12:15:11,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:15:11,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 12:15:11,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-01-31 12:15:11,616 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:11,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:15:11,722 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2022-01-31 12:15:11,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 12:15:11,723 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 12:15:11,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:15:11,723 INFO L225 Difference]: With dead ends: 49 [2022-01-31 12:15:11,723 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 12:15:11,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-01-31 12:15:11,725 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 11 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 12:15:11,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 161 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 12:15:11,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 12:15:11,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-01-31 12:15:11,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:11,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2022-01-31 12:15:11,728 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 28 [2022-01-31 12:15:11,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:15:11,728 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2022-01-31 12:15:11,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:11,729 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2022-01-31 12:15:11,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 12:15:11,729 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:15:11,729 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 12:15:11,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 12:15:11,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:15:11,947 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:15:11,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:15:11,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1691240082, now seen corresponding path program 1 times [2022-01-31 12:15:11,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:15:11,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785215226] [2022-01-31 12:15:11,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:15:11,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:15:11,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:12,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:15:12,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 12:15:12,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:15:12,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785215226] [2022-01-31 12:15:12,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785215226] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:15:12,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687041368] [2022-01-31 12:15:12,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:15:12,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:15:12,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:15:12,022 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 12:15:12,023 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 12:15:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:12,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 12:15:12,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:15:12,194 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 16 treesize of output 8 [2022-01-31 12:15:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 12:15:12,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:15:12,311 INFO L353 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-01-31 12:15:12,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 32 [2022-01-31 12:15:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 12:15:12,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687041368] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:15:12,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:15:12,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 7] total 16 [2022-01-31 12:15:12,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113009659] [2022-01-31 12:15:12,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:15:12,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 12:15:12,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:15:12,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 12:15:12,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-01-31 12:15:12,348 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:12,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:15:12,706 INFO L93 Difference]: Finished difference Result 130 states and 176 transitions. [2022-01-31 12:15:12,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 12:15:12,707 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-31 12:15:12,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:15:12,708 INFO L225 Difference]: With dead ends: 130 [2022-01-31 12:15:12,708 INFO L226 Difference]: Without dead ends: 130 [2022-01-31 12:15:12,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2022-01-31 12:15:12,709 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 269 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 12:15:12,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 72 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 12:15:12,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-01-31 12:15:12,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 48. [2022-01-31 12:15:12,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:12,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2022-01-31 12:15:12,714 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 29 [2022-01-31 12:15:12,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:15:12,714 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2022-01-31 12:15:12,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:12,715 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2022-01-31 12:15:12,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 12:15:12,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:15:12,715 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 12:15:12,739 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 12:15:12,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:15:12,938 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:15:12,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:15:12,939 INFO L85 PathProgramCache]: Analyzing trace with hash 671956355, now seen corresponding path program 1 times [2022-01-31 12:15:12,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:15:12,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781746972] [2022-01-31 12:15:12,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:15:12,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:15:12,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:13,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:15:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 12:15:13,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:15:13,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781746972] [2022-01-31 12:15:13,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781746972] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:15:13,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117134501] [2022-01-31 12:15:13,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:15:13,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:15:13,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:15:13,048 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 12:15:13,058 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 12:15:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:13,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 12:15:13,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:15:13,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 12:15:13,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:15:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 12:15:13,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117134501] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:15:13,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:15:13,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 10 [2022-01-31 12:15:13,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545289604] [2022-01-31 12:15:13,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:15:13,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 12:15:13,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:15:13,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 12:15:13,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-31 12:15:13,291 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:13,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:15:13,881 INFO L93 Difference]: Finished difference Result 281 states and 377 transitions. [2022-01-31 12:15:13,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 12:15:13,881 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 12:15:13,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:15:13,882 INFO L225 Difference]: With dead ends: 281 [2022-01-31 12:15:13,882 INFO L226 Difference]: Without dead ends: 281 [2022-01-31 12:15:13,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=584, Unknown=0, NotChecked=0, Total=812 [2022-01-31 12:15:13,883 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 457 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 12:15:13,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 67 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 12:15:13,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-01-31 12:15:13,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 78. [2022-01-31 12:15:13,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.2876712328767124) internal successors, (94), 73 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:13,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 98 transitions. [2022-01-31 12:15:13,896 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 98 transitions. Word has length 32 [2022-01-31 12:15:13,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:15:13,896 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 98 transitions. [2022-01-31 12:15:13,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:13,896 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 98 transitions. [2022-01-31 12:15:13,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 12:15:13,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:15:13,897 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:15:13,929 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 12:15:14,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:15:14,098 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:15:14,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:15:14,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1036352920, now seen corresponding path program 2 times [2022-01-31 12:15:14,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:15:14,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950708577] [2022-01-31 12:15:14,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:15:14,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:15:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:14,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:15:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-31 12:15:14,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:15:14,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950708577] [2022-01-31 12:15:14,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950708577] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:15:14,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130921277] [2022-01-31 12:15:14,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 12:15:14,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:15:14,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:15:14,243 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 12:15:14,302 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 12:15:14,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 12:15:14,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:15:14,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-31 12:15:14,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:15:14,443 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 13 treesize of output 9 [2022-01-31 12:15:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-31 12:15:14,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:15:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 12:15:14,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130921277] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:15:14,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:15:14,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 11] total 22 [2022-01-31 12:15:14,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651566648] [2022-01-31 12:15:14,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:15:14,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 12:15:14,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:15:14,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 12:15:14,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-01-31 12:15:14,973 INFO L87 Difference]: Start difference. First operand 78 states and 98 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:16,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:15:16,778 INFO L93 Difference]: Finished difference Result 1052 states and 1405 transitions. [2022-01-31 12:15:16,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 12:15:16,779 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-01-31 12:15:16,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:15:16,782 INFO L225 Difference]: With dead ends: 1052 [2022-01-31 12:15:16,782 INFO L226 Difference]: Without dead ends: 1052 [2022-01-31 12:15:16,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=779, Invalid=3253, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 12:15:16,784 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 1126 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 12:15:16,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1126 Valid, 119 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 12:15:16,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2022-01-31 12:15:16,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 134. [2022-01-31 12:15:16,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.302325581395349) internal successors, (168), 129 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:16,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 172 transitions. [2022-01-31 12:15:16,794 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 172 transitions. Word has length 43 [2022-01-31 12:15:16,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:15:16,794 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 172 transitions. [2022-01-31 12:15:16,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:16,794 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 172 transitions. [2022-01-31 12:15:16,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 12:15:16,795 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:15:16,795 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:15:16,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 12:15:17,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:15:17,014 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:15:17,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:15:17,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1669091715, now seen corresponding path program 3 times [2022-01-31 12:15:17,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:15:17,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351544622] [2022-01-31 12:15:17,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:15:17,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:15:17,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:17,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:15:17,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-31 12:15:17,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:15:17,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351544622] [2022-01-31 12:15:17,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351544622] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:15:17,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731935646] [2022-01-31 12:15:17,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 12:15:17,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:15:17,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:15:17,185 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 12:15:17,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 12:15:17,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-31 12:15:17,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:15:17,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 12:15:17,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:15:17,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 12:15:17,499 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 12:15:17,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-01-31 12:15:17,531 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-31 12:15:17,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:15:17,730 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-31 12:15:17,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 1 [2022-01-31 12:15:17,774 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-01-31 12:15:17,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731935646] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 12:15:17,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-31 12:15:17,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 10] total 24 [2022-01-31 12:15:17,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917307792] [2022-01-31 12:15:17,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:15:17,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 12:15:17,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:15:17,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 12:15:17,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-01-31 12:15:17,776 INFO L87 Difference]: Start difference. First operand 134 states and 172 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:17,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:15:17,860 INFO L93 Difference]: Finished difference Result 143 states and 181 transitions. [2022-01-31 12:15:17,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 12:15:17,861 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-01-31 12:15:17,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:15:17,861 INFO L225 Difference]: With dead ends: 143 [2022-01-31 12:15:17,862 INFO L226 Difference]: Without dead ends: 137 [2022-01-31 12:15:17,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-31 12:15:17,862 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 48 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 12:15:17,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 154 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 12:15:17,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-31 12:15:17,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 101. [2022-01-31 12:15:17,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.28125) internal successors, (123), 96 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:17,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 127 transitions. [2022-01-31 12:15:17,866 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 127 transitions. Word has length 51 [2022-01-31 12:15:17,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:15:17,866 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 127 transitions. [2022-01-31 12:15:17,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:17,866 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 127 transitions. [2022-01-31 12:15:17,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 12:15:17,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:15:17,867 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2022-01-31 12:15:17,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 12:15:18,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:15:18,068 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:15:18,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:15:18,068 INFO L85 PathProgramCache]: Analyzing trace with hash 860965540, now seen corresponding path program 1 times [2022-01-31 12:15:18,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:15:18,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928954888] [2022-01-31 12:15:18,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:15:18,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:15:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:18,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:15:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:18,143 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-31 12:15:18,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:15:18,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928954888] [2022-01-31 12:15:18,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928954888] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:15:18,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382387556] [2022-01-31 12:15:18,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:15:18,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:15:18,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:15:18,145 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 12:15:18,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 12:15:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:18,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-31 12:15:18,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:15:18,313 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 12:15:18,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:15:18,436 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 12:15:18,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382387556] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:15:18,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:15:18,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-01-31 12:15:18,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899284036] [2022-01-31 12:15:18,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:15:18,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 12:15:18,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:15:18,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 12:15:18,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-01-31 12:15:18,438 INFO L87 Difference]: Start difference. First operand 101 states and 127 transitions. Second operand has 18 states, 18 states have (on average 4.611111111111111) internal successors, (83), 17 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:21,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:15:21,448 INFO L93 Difference]: Finished difference Result 828 states and 1101 transitions. [2022-01-31 12:15:21,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 12:15:21,449 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.611111111111111) internal successors, (83), 17 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 12:15:21,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:15:21,452 INFO L225 Difference]: With dead ends: 828 [2022-01-31 12:15:21,452 INFO L226 Difference]: Without dead ends: 828 [2022-01-31 12:15:21,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2153 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1335, Invalid=5471, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 12:15:21,454 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 1798 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1885 mSolverCounterSat, 600 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1798 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 600 IncrementalHoareTripleChecker+Valid, 1885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 12:15:21,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1798 Valid, 164 Invalid, 2485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [600 Valid, 1885 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 12:15:21,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-01-31 12:15:21,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 211. [2022-01-31 12:15:21,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.3058252427184467) internal successors, (269), 206 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:21,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 273 transitions. [2022-01-31 12:15:21,463 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 273 transitions. Word has length 54 [2022-01-31 12:15:21,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:15:21,463 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 273 transitions. [2022-01-31 12:15:21,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.611111111111111) internal successors, (83), 17 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:21,463 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 273 transitions. [2022-01-31 12:15:21,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 12:15:21,464 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:15:21,464 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 5, 5, 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] [2022-01-31 12:15:21,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 12:15:21,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 12:15:21,684 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:15:21,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:15:21,685 INFO L85 PathProgramCache]: Analyzing trace with hash -247948122, now seen corresponding path program 2 times [2022-01-31 12:15:21,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:15:21,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930093274] [2022-01-31 12:15:21,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:15:21,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:15:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:21,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:15:21,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:21,814 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-01-31 12:15:21,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:15:21,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930093274] [2022-01-31 12:15:21,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930093274] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:15:21,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355527636] [2022-01-31 12:15:21,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 12:15:21,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:15:21,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:15:21,819 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 12:15:21,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 12:15:22,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 12:15:22,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:15:22,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 12:15:22,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:15:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-01-31 12:15:22,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:15:22,370 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-01-31 12:15:22,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355527636] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:15:22,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:15:22,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-01-31 12:15:22,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074208723] [2022-01-31 12:15:22,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:15:22,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 12:15:22,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:15:22,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 12:15:22,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-01-31 12:15:22,372 INFO L87 Difference]: Start difference. First operand 211 states and 273 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:23,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:15:23,187 INFO L93 Difference]: Finished difference Result 1462 states and 1950 transitions. [2022-01-31 12:15:23,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 12:15:23,188 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-01-31 12:15:23,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:15:23,192 INFO L225 Difference]: With dead ends: 1462 [2022-01-31 12:15:23,192 INFO L226 Difference]: Without dead ends: 1462 [2022-01-31 12:15:23,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2022-01-31 12:15:23,193 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 696 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 12:15:23,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 116 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 12:15:23,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2022-01-31 12:15:23,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 221. [2022-01-31 12:15:23,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.2916666666666667) internal successors, (279), 216 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:23,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 283 transitions. [2022-01-31 12:15:23,227 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 283 transitions. Word has length 92 [2022-01-31 12:15:23,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:15:23,228 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 283 transitions. [2022-01-31 12:15:23,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:23,229 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 283 transitions. [2022-01-31 12:15:23,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 12:15:23,231 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:15:23,231 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 8, 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] [2022-01-31 12:15:23,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 12:15:23,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:15:23,450 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:15:23,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:15:23,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1837140656, now seen corresponding path program 3 times [2022-01-31 12:15:23,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:15:23,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409283233] [2022-01-31 12:15:23,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:15:23,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:15:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:27,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:15:27,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-31 12:15:27,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:15:27,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409283233] [2022-01-31 12:15:27,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409283233] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:15:27,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565232396] [2022-01-31 12:15:27,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 12:15:27,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:15:27,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:15:27,047 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 12:15:27,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 12:15:28,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-31 12:15:28,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:15:28,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 75 conjunts are in the unsatisfiable core [2022-01-31 12:15:28,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:15:28,372 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 10 treesize of output 8 [2022-01-31 12:15:28,430 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 25 treesize of output 25 [2022-01-31 12:15:28,489 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 25 treesize of output 25 [2022-01-31 12:15:28,521 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 25 treesize of output 25 [2022-01-31 12:15:28,547 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 25 treesize of output 25 [2022-01-31 12:15:28,573 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 25 treesize of output 25 [2022-01-31 12:15:28,605 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 25 treesize of output 25 [2022-01-31 12:15:28,632 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 25 treesize of output 25 [2022-01-31 12:15:28,659 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 25 treesize of output 25 [2022-01-31 12:15:28,683 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 25 treesize of output 25 [2022-01-31 12:15:28,707 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 25 treesize of output 25 [2022-01-31 12:15:28,738 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 25 treesize of output 25 [2022-01-31 12:15:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 16 proven. 96 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-01-31 12:15:30,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:15:38,120 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_296 (Array Int Int))) (let ((.cse0 (select v_ArrVal_296 |c_main_~#string_entrada~0.offset|)) (.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_296) |c_main_~#vetor_vogais~0.base|))) (or (< .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 7))) (not (= .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 1))))))) is different from false [2022-01-31 12:15:38,259 WARN L838 $PredicateComparison]: unable to prove that (or (not (< (mod c_main_~i~0 4294967296) 10)) (forall ((v_ArrVal_296 (Array Int Int))) (let ((.cse0 (select v_ArrVal_296 |c_main_~#string_entrada~0.offset|)) (.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_296) |c_main_~#vetor_vogais~0.base|))) (or (< .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 7))) (not (= .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 1)))))))) is different from false [2022-01-31 12:15:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 65 proven. 74 refuted. 0 times theorem prover too weak. 193 trivial. 10 not checked. [2022-01-31 12:15:38,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565232396] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:15:38,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:15:38,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 15, 23] total 66 [2022-01-31 12:15:38,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748995062] [2022-01-31 12:15:38,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:15:38,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 12:15:38,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:15:38,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 12:15:38,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=3573, Unknown=2, NotChecked=250, Total=4290 [2022-01-31 12:15:38,282 INFO L87 Difference]: Start difference. First operand 221 states and 283 transitions. Second operand has 66 states, 66 states have (on average 2.5757575757575757) internal successors, (170), 65 states have internal predecessors, (170), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:41,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:15:41,059 INFO L93 Difference]: Finished difference Result 267 states and 342 transitions. [2022-01-31 12:15:41,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 12:15:41,060 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.5757575757575757) internal successors, (170), 65 states have internal predecessors, (170), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 12:15:41,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:15:41,061 INFO L225 Difference]: With dead ends: 267 [2022-01-31 12:15:41,061 INFO L226 Difference]: Without dead ends: 267 [2022-01-31 12:15:41,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 212 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2435 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=1069, Invalid=7867, Unknown=2, NotChecked=374, Total=9312 [2022-01-31 12:15:41,065 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 299 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 426 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 12:15:41,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 124 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 896 Invalid, 0 Unknown, 426 Unchecked, 0.6s Time] [2022-01-31 12:15:41,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-01-31 12:15:41,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2022-01-31 12:15:41,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.2923076923076924) internal successors, (336), 260 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:41,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 340 transitions. [2022-01-31 12:15:41,070 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 340 transitions. Word has length 102 [2022-01-31 12:15:41,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:15:41,071 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 340 transitions. [2022-01-31 12:15:41,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.5757575757575757) internal successors, (170), 65 states have internal predecessors, (170), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:15:41,071 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 340 transitions. [2022-01-31 12:15:41,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 12:15:41,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:15:41,073 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 7, 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] [2022-01-31 12:15:41,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 12:15:41,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 12:15:41,282 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:15:41,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:15:41,283 INFO L85 PathProgramCache]: Analyzing trace with hash 653793359, now seen corresponding path program 1 times [2022-01-31 12:15:41,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:15:41,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927096253] [2022-01-31 12:15:41,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:15:41,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:15:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:43,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:15:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 199 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-01-31 12:15:43,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:15:43,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927096253] [2022-01-31 12:15:43,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927096253] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:15:43,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733478470] [2022-01-31 12:15:43,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:15:43,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:15:43,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:15:43,474 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 12:15:43,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 12:15:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:15:43,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-31 12:15:43,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:15:43,678 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 10 treesize of output 8 [2022-01-31 12:15:43,707 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 23 treesize of output 23 [2022-01-31 12:15:43,749 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 23 treesize of output 23 [2022-01-31 12:15:43,800 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 23 treesize of output 23 [2022-01-31 12:15:43,843 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 23 treesize of output 23 [2022-01-31 12:15:43,857 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 23 treesize of output 23 [2022-01-31 12:15:43,869 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 23 treesize of output 23 [2022-01-31 12:15:43,893 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 23 treesize of output 23 [2022-01-31 12:15:43,913 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 23 treesize of output 23 [2022-01-31 12:15:43,932 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 23 treesize of output 23 [2022-01-31 12:15:43,955 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 23 treesize of output 23 [2022-01-31 12:15:43,983 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 23 treesize of output 23 [2022-01-31 12:15:44,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2022-01-31 12:15:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 62 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-01-31 12:15:44,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:15:55,784 WARN L838 $PredicateComparison]: unable to prove that (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_363 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_363) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_363 |main_~#string_entrada~0.offset|))) (or (< .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< (select .cse1 |c_main_~#vetor_vogais~0.offset|) .cse0)))) is different from false [2022-01-31 12:15:55,870 WARN L838 $PredicateComparison]: unable to prove that (or (not (< (mod c_main_~i~0 4294967296) 10)) (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_363 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_363) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_363 |main_~#string_entrada~0.offset|))) (or (< .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< (select .cse1 |c_main_~#vetor_vogais~0.offset|) .cse0))))) is different from false [2022-01-31 12:15:55,880 WARN L838 $PredicateComparison]: unable to prove that (or (not (< (mod (+ c_main_~i~0 1) 4294967296) 10)) (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_363 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_363) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_363 |main_~#string_entrada~0.offset|))) (or (< .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< (select .cse1 |c_main_~#vetor_vogais~0.offset|) .cse0))))) is different from false [2022-01-31 12:15:55,892 WARN L838 $PredicateComparison]: unable to prove that (or (not (< (mod (+ c_main_~i~0 1) 4294967296) 10)) (not (< (mod c_main_~i~0 4294967296) 10)) (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_363 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_363) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_363 |main_~#string_entrada~0.offset|))) (or (< .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< (select .cse1 |c_main_~#vetor_vogais~0.offset|) .cse0))))) is different from false [2022-01-31 12:15:55,994 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 72 proven. 9 refuted. 0 times theorem prover too weak. 217 trivial. 44 not checked. [2022-01-31 12:15:55,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733478470] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:15:55,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:15:55,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16, 19] total 59 [2022-01-31 12:15:55,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163073298] [2022-01-31 12:15:55,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:15:55,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 12:15:55,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:15:55,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 12:15:55,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=2683, Unknown=12, NotChecked=436, Total=3422 [2022-01-31 12:15:55,996 INFO L87 Difference]: Start difference. First operand 265 states and 340 transitions. Second operand has 59 states, 59 states have (on average 2.457627118644068) internal successors, (145), 58 states have internal predecessors, (145), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:16:01,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:16:01,155 INFO L93 Difference]: Finished difference Result 565 states and 732 transitions. [2022-01-31 12:16:01,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 12:16:01,156 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.457627118644068) internal successors, (145), 58 states have internal predecessors, (145), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 12:16:01,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:16:01,157 INFO L225 Difference]: With dead ends: 565 [2022-01-31 12:16:01,157 INFO L226 Difference]: Without dead ends: 565 [2022-01-31 12:16:01,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 207 SyntacticMatches, 5 SemanticMatches, 116 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 3649 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=1479, Invalid=11407, Unknown=12, NotChecked=908, Total=13806 [2022-01-31 12:16:01,160 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 642 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 2115 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 3246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 2115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 943 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 12:16:01,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 144 Invalid, 3246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 2115 Invalid, 0 Unknown, 943 Unchecked, 1.3s Time] [2022-01-31 12:16:01,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-01-31 12:16:01,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 437. [2022-01-31 12:16:01,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 432 states have (on average 1.2962962962962963) internal successors, (560), 432 states have internal predecessors, (560), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:16:01,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 564 transitions. [2022-01-31 12:16:01,172 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 564 transitions. Word has length 102 [2022-01-31 12:16:01,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:16:01,172 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 564 transitions. [2022-01-31 12:16:01,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.457627118644068) internal successors, (145), 58 states have internal predecessors, (145), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:16:01,173 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 564 transitions. [2022-01-31 12:16:01,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 12:16:01,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:16:01,174 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 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] [2022-01-31 12:16:01,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 12:16:01,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 12:16:01,395 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:16:01,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:16:01,395 INFO L85 PathProgramCache]: Analyzing trace with hash 808079791, now seen corresponding path program 1 times [2022-01-31 12:16:01,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:16:01,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548001253] [2022-01-31 12:16:01,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:16:01,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:16:01,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:16:02,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:16:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:16:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 52 proven. 26 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-01-31 12:16:02,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:16:02,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548001253] [2022-01-31 12:16:02,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548001253] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:16:02,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073098695] [2022-01-31 12:16:02,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:16:02,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:16:02,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:16:02,008 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 12:16:02,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 12:16:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:16:02,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-31 12:16:02,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:16:13,079 INFO L353 Elim1Store]: treesize reduction 82, result has 65.1 percent of original size [2022-01-31 12:16:13,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 195 treesize of output 251 [2022-01-31 12:16:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 95 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-01-31 12:16:17,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:16:20,024 INFO L353 Elim1Store]: treesize reduction 147, result has 69.6 percent of original size [2022-01-31 12:16:20,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 226 treesize of output 437 [2022-01-31 12:16:21,408 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2022-01-31 12:16:21,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-31 12:16:21,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 12:16:21,610 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Possible infinite loop detected aux_mod_aux_mod_main_~i~0_26_37 already exists at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:202) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:589) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:577) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:490) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:422) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.findBestReplacementSbr(DualJunctionDer.java:311) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:327) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:234) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:201) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:185) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:152) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminate(DualJunctionDer.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:904) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:496) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.doit(QuantifierPusher.java:635) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:446) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-01-31 12:16:21,617 INFO L158 Benchmark]: Toolchain (without parser) took 72943.99ms. Allocated memory was 161.5MB in the beginning and 528.5MB in the end (delta: 367.0MB). Free memory was 106.4MB in the beginning and 312.0MB in the end (delta: -205.6MB). Peak memory consumption was 289.4MB. Max. memory is 8.0GB. [2022-01-31 12:16:21,618 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 161.5MB. Free memory was 122.8MB in the beginning and 122.7MB in the end (delta: 136.5kB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 12:16:21,618 INFO L158 Benchmark]: CACSL2BoogieTranslator took 361.24ms. Allocated memory was 161.5MB in the beginning and 244.3MB in the end (delta: 82.8MB). Free memory was 106.1MB in the beginning and 219.0MB in the end (delta: -112.9MB). Peak memory consumption was 15.2MB. Max. memory is 8.0GB. [2022-01-31 12:16:21,618 INFO L158 Benchmark]: Boogie Preprocessor took 65.07ms. Allocated memory is still 244.3MB. Free memory was 219.0MB in the beginning and 217.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 12:16:21,619 INFO L158 Benchmark]: RCFGBuilder took 425.15ms. Allocated memory is still 244.3MB. Free memory was 217.4MB in the beginning and 203.3MB in the end (delta: 14.2MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-01-31 12:16:21,619 INFO L158 Benchmark]: IcfgTransformer took 32.47ms. Allocated memory is still 244.3MB. Free memory was 203.3MB in the beginning and 201.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 12:16:21,619 INFO L158 Benchmark]: TraceAbstraction took 72039.84ms. Allocated memory was 244.3MB in the beginning and 528.5MB in the end (delta: 284.2MB). Free memory was 201.2MB in the beginning and 312.0MB in the end (delta: -110.8MB). Peak memory consumption was 301.8MB. Max. memory is 8.0GB. [2022-01-31 12:16:21,620 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 161.5MB. Free memory was 122.8MB in the beginning and 122.7MB in the end (delta: 136.5kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 361.24ms. Allocated memory was 161.5MB in the beginning and 244.3MB in the end (delta: 82.8MB). Free memory was 106.1MB in the beginning and 219.0MB in the end (delta: -112.9MB). Peak memory consumption was 15.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 65.07ms. Allocated memory is still 244.3MB. Free memory was 219.0MB in the beginning and 217.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 425.15ms. Allocated memory is still 244.3MB. Free memory was 217.4MB in the beginning and 203.3MB in the end (delta: 14.2MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * IcfgTransformer took 32.47ms. Allocated memory is still 244.3MB. Free memory was 203.3MB in the beginning and 201.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 72039.84ms. Allocated memory was 244.3MB in the beginning and 528.5MB in the end (delta: 284.2MB). Free memory was 201.2MB in the beginning and 312.0MB in the end (delta: -110.8MB). Peak memory consumption was 301.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Possible infinite loop detected aux_mod_aux_mod_main_~i~0_26_37 already exists de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Possible infinite loop detected aux_mod_aux_mod_main_~i~0_26_37 already exists: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:202) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-01-31 12:16:21,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...