/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy9_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 07:52:48,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 07:52:48,346 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 07:52:48,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 07:52:48,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 07:52:48,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 07:52:48,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 07:52:48,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 07:52:48,420 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 07:52:48,421 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 07:52:48,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 07:52:48,423 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 07:52:48,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 07:52:48,433 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 07:52:48,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 07:52:48,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 07:52:48,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 07:52:48,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 07:52:48,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 07:52:48,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 07:52:48,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 07:52:48,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 07:52:48,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 07:52:48,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 07:52:48,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 07:52:48,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 07:52:48,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 07:52:48,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 07:52:48,464 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 07:52:48,465 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 07:52:48,465 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 07:52:48,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 07:52:48,466 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 07:52:48,467 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 07:52:48,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 07:52:48,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 07:52:48,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 07:52:48,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 07:52:48,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 07:52:48,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 07:52:48,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 07:52:48,476 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 07:52:48,494 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 07:52:48,495 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 07:52:48,497 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 07:52:48,497 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 07:52:48,497 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 07:52:48,497 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 07:52:48,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 07:52:48,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 07:52:48,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 07:52:48,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 07:52:48,499 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 07:52:48,499 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 07:52:48,499 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 07:52:48,499 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 07:52:48,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 07:52:48,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 07:52:48,499 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 07:52:48,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 07:52:48,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:52:48,500 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 07:52:48,500 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 07:52:48,501 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 07:52:48,501 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 07:52:48,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 07:52:48,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 07:52:48,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 07:52:48,762 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 07:52:48,764 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 07:52:48,765 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy9_ground-2.i [2022-01-31 07:52:48,827 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4b152724/d09ce10e93964118a8e148e048430d10/FLAG4a262fdf7 [2022-01-31 07:52:49,213 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 07:52:49,213 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy9_ground-2.i [2022-01-31 07:52:49,226 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4b152724/d09ce10e93964118a8e148e048430d10/FLAG4a262fdf7 [2022-01-31 07:52:49,246 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4b152724/d09ce10e93964118a8e148e048430d10 [2022-01-31 07:52:49,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 07:52:49,251 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 07:52:49,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 07:52:49,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 07:52:49,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 07:52:49,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:52:49" (1/1) ... [2022-01-31 07:52:49,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41012b97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:52:49, skipping insertion in model container [2022-01-31 07:52:49,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:52:49" (1/1) ... [2022-01-31 07:52:49,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 07:52:49,288 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 07:52:49,507 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy9_ground-2.i[816,829] [2022-01-31 07:52:49,549 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:52:49,555 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 07:52:49,571 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy9_ground-2.i[816,829] [2022-01-31 07:52:49,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:52:49,615 INFO L208 MainTranslator]: Completed translation [2022-01-31 07:52:49,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:52:49 WrapperNode [2022-01-31 07:52:49,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 07:52:49,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 07:52:49,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 07:52:49,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 07:52:49,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:52:49" (1/1) ... [2022-01-31 07:52:49,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:52:49" (1/1) ... [2022-01-31 07:52:49,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:52:49" (1/1) ... [2022-01-31 07:52:49,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:52:49" (1/1) ... [2022-01-31 07:52:49,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:52:49" (1/1) ... [2022-01-31 07:52:49,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:52:49" (1/1) ... [2022-01-31 07:52:49,674 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:52:49" (1/1) ... [2022-01-31 07:52:49,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 07:52:49,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 07:52:49,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 07:52:49,678 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 07:52:49,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:52:49" (1/1) ... [2022-01-31 07:52:49,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:52:49,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:52:49,717 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 07:52:49,740 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 07:52:49,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 07:52:49,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 07:52:49,762 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 07:52:49,762 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 07:52:49,762 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 07:52:49,763 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 07:52:49,763 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 07:52:49,763 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 07:52:49,763 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 07:52:49,763 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 07:52:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 07:52:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 07:52:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 07:52:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 07:52:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 07:52:49,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 07:52:49,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 07:52:49,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 07:52:49,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 07:52:49,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 07:52:49,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 07:52:49,862 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 07:52:49,864 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 07:52:50,086 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 07:52:50,092 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 07:52:50,092 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-01-31 07:52:50,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:52:50 BoogieIcfgContainer [2022-01-31 07:52:50,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 07:52:50,095 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 07:52:50,095 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 07:52:50,096 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 07:52:50,101 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:52:50" (1/1) ... [2022-01-31 07:52:50,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:52:50 BasicIcfg [2022-01-31 07:52:50,127 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 07:52:50,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 07:52:50,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 07:52:50,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 07:52:50,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:52:49" (1/4) ... [2022-01-31 07:52:50,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e32c522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:52:50, skipping insertion in model container [2022-01-31 07:52:50,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:52:49" (2/4) ... [2022-01-31 07:52:50,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e32c522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:52:50, skipping insertion in model container [2022-01-31 07:52:50,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:52:50" (3/4) ... [2022-01-31 07:52:50,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e32c522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 07:52:50, skipping insertion in model container [2022-01-31 07:52:50,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:52:50" (4/4) ... [2022-01-31 07:52:50,150 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-2.iJordan [2022-01-31 07:52:50,154 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 07:52:50,154 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 07:52:50,209 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 07:52:50,226 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 07:52:50,226 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 07:52:50,239 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 43 states have (on average 1.558139534883721) internal successors, (67), 44 states have internal predecessors, (67), 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 07:52:50,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 07:52:50,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:52:50,247 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:52:50,247 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:52:50,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:52:50,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1517276586, now seen corresponding path program 1 times [2022-01-31 07:52:50,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:52:50,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344047630] [2022-01-31 07:52:50,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:52:50,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:52:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:50,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:52:50,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:50,526 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 07:52:50,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:52:50,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344047630] [2022-01-31 07:52:50,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344047630] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:52:50,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:52:50,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 07:52:50,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948213737] [2022-01-31 07:52:50,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:52:50,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:52:50,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:52:50,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:52:50,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 07:52:50,568 INFO L87 Difference]: Start difference. First operand has 51 states, 43 states have (on average 1.558139534883721) internal successors, (67), 44 states have internal predecessors, (67), 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 9.0) internal successors, (27), 2 states have internal predecessors, (27), 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 07:52:50,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:52:50,622 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2022-01-31 07:52:50,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:52:50,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 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 31 [2022-01-31 07:52:50,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:52:50,632 INFO L225 Difference]: With dead ends: 51 [2022-01-31 07:52:50,632 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 07:52:50,634 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 07:52:50,640 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 52 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 63 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 07:52:50,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 63 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:52:50,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 07:52:50,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-01-31 07:52:50,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:52:50,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-01-31 07:52:50,681 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 31 [2022-01-31 07:52:50,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:52:50,682 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-01-31 07:52:50,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 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 07:52:50,683 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-01-31 07:52:50,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 07:52:50,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:52:50,686 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:52:50,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 07:52:50,686 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:52:50,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:52:50,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1456084255, now seen corresponding path program 1 times [2022-01-31 07:52:50,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:52:50,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090605918] [2022-01-31 07:52:50,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:52:50,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:52:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:50,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:52:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:50,857 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 07:52:50,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:52:50,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090605918] [2022-01-31 07:52:50,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090605918] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:52:50,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:52:50,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 07:52:50,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717906951] [2022-01-31 07:52:50,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:52:50,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 07:52:50,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:52:50,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 07:52:50,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 07:52:50,862 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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 07:52:50,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:52:50,999 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2022-01-31 07:52:51,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 07:52:51,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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 31 [2022-01-31 07:52:51,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:52:51,001 INFO L225 Difference]: With dead ends: 48 [2022-01-31 07:52:51,001 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 07:52:51,001 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 07:52:51,003 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 51 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:52:51,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 60 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:52:51,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 07:52:51,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-01-31 07:52:51,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:52:51,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2022-01-31 07:52:51,014 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 31 [2022-01-31 07:52:51,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:52:51,015 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2022-01-31 07:52:51,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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 07:52:51,016 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2022-01-31 07:52:51,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 07:52:51,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:52:51,017 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:52:51,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 07:52:51,017 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:52:51,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:52:51,018 INFO L85 PathProgramCache]: Analyzing trace with hash -75201347, now seen corresponding path program 1 times [2022-01-31 07:52:51,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:52:51,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827322818] [2022-01-31 07:52:51,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:52:51,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:52:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:51,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:52:51,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:51,104 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 07:52:51,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:52:51,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827322818] [2022-01-31 07:52:51,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827322818] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:52:51,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68201473] [2022-01-31 07:52:51,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:52:51,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:52:51,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:52:51,108 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 07:52:51,109 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 07:52:51,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:51,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 07:52:51,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:52:51,303 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 07:52:51,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 07:52:51,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68201473] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:52:51,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 07:52:51,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 07:52:51,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418522379] [2022-01-31 07:52:51,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:52:51,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:52:51,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:52:51,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:52:51,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 07:52:51,306 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 07:52:51,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:52:51,391 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2022-01-31 07:52:51,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:52:51,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 33 [2022-01-31 07:52:51,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:52:51,394 INFO L225 Difference]: With dead ends: 65 [2022-01-31 07:52:51,394 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 07:52:51,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 07:52:51,398 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 9 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:52:51,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 58 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:52:51,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 07:52:51,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2022-01-31 07:52:51,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:52:51,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-01-31 07:52:51,418 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 33 [2022-01-31 07:52:51,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:52:51,418 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-01-31 07:52:51,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 07:52:51,419 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-01-31 07:52:51,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 07:52:51,419 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:52:51,420 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:52:51,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 07:52:51,627 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 07:52:51,628 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:52:51,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:52:51,628 INFO L85 PathProgramCache]: Analyzing trace with hash -420139093, now seen corresponding path program 1 times [2022-01-31 07:52:51,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:52:51,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951221795] [2022-01-31 07:52:51,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:52:51,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:52:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:51,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:52:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 07:52:51,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:52:51,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951221795] [2022-01-31 07:52:51,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951221795] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:52:51,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263289794] [2022-01-31 07:52:51,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:52:51,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:52:51,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:52:51,744 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 07:52:51,772 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 07:52:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:51,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 07:52:51,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:52:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 07:52:52,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:52:52,191 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 07:52:52,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263289794] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:52:52,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:52:52,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 07:52:52,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130047978] [2022-01-31 07:52:52,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:52:52,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 07:52:52,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:52:52,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 07:52:52,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 07:52:52,198 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 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 07:52:52,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:52:52,345 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2022-01-31 07:52:52,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 07:52:52,347 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 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 51 [2022-01-31 07:52:52,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:52:52,348 INFO L225 Difference]: With dead ends: 62 [2022-01-31 07:52:52,348 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 07:52:52,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 07:52:52,349 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 56 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:52:52,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 65 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:52:52,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 07:52:52,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-01-31 07:52:52,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 56 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:52:52,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-01-31 07:52:52,355 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 51 [2022-01-31 07:52:52,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:52:52,355 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-01-31 07:52:52,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 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 07:52:52,356 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-01-31 07:52:52,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 07:52:52,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:52:52,357 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:52:52,388 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 07:52:52,572 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 07:52:52,572 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:52:52,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:52:52,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1790992133, now seen corresponding path program 2 times [2022-01-31 07:52:52,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:52:52,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240227283] [2022-01-31 07:52:52,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:52:52,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:52:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:52,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:52:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 07:52:52,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:52:52,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240227283] [2022-01-31 07:52:52,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240227283] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:52:52,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275023670] [2022-01-31 07:52:52,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:52:52,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:52:52,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:52:52,643 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 07:52:52,662 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 07:52:52,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:52:52,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:52:52,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 07:52:52,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:52:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 07:52:52,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:52:53,091 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 07:52:53,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275023670] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:52:53,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:52:53,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-01-31 07:52:53,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417476078] [2022-01-31 07:52:53,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:52:53,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 07:52:53,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:52:53,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 07:52:53,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-31 07:52:53,094 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 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 07:52:53,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:52:53,472 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2022-01-31 07:52:53,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 07:52:53,473 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 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 57 [2022-01-31 07:52:53,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:52:53,474 INFO L225 Difference]: With dead ends: 101 [2022-01-31 07:52:53,474 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 07:52:53,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2022-01-31 07:52:53,475 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 117 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:52:53,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 57 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 07:52:53,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 07:52:53,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2022-01-31 07:52:53,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 86 states have (on average 1.127906976744186) internal successors, (97), 86 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:52:53,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2022-01-31 07:52:53,482 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 57 [2022-01-31 07:52:53,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:52:53,482 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2022-01-31 07:52:53,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 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 07:52:53,482 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2022-01-31 07:52:53,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 07:52:53,483 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:52:53,484 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:52:53,511 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 07:52:53,699 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 07:52:53,700 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:52:53,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:52:53,701 INFO L85 PathProgramCache]: Analyzing trace with hash 245489447, now seen corresponding path program 3 times [2022-01-31 07:52:53,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:52:53,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694237850] [2022-01-31 07:52:53,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:52:53,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:52:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:53,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:52:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:53,937 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 07:52:53,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:52:53,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694237850] [2022-01-31 07:52:53,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694237850] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:52:53,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951484389] [2022-01-31 07:52:53,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 07:52:53,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:52:53,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:52:53,939 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 07:52:53,941 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 07:52:54,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 07:52:54,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:52:54,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 07:52:54,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:52:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-01-31 07:52:54,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:52:54,489 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-01-31 07:52:54,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951484389] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:52:54,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:52:54,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-01-31 07:52:54,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457452779] [2022-01-31 07:52:54,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:52:54,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 07:52:54,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:52:54,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 07:52:54,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-01-31 07:52:54,492 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand has 20 states, 20 states have (on average 5.3) internal successors, (106), 19 states have internal predecessors, (106), 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 07:52:55,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:52:55,104 INFO L93 Difference]: Finished difference Result 167 states and 177 transitions. [2022-01-31 07:52:55,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 07:52:55,105 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.3) internal successors, (106), 19 states have internal predecessors, (106), 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 87 [2022-01-31 07:52:55,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:52:55,106 INFO L225 Difference]: With dead ends: 167 [2022-01-31 07:52:55,106 INFO L226 Difference]: Without dead ends: 167 [2022-01-31 07:52:55,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 07:52:55,108 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 186 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 07:52:55,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 82 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 07:52:55,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-31 07:52:55,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2022-01-31 07:52:55,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 160 states have (on average 1.06875) internal successors, (171), 160 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:52:55,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 176 transitions. [2022-01-31 07:52:55,116 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 176 transitions. Word has length 87 [2022-01-31 07:52:55,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:52:55,116 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 176 transitions. [2022-01-31 07:52:55,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.3) internal successors, (106), 19 states have internal predecessors, (106), 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 07:52:55,117 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 176 transitions. [2022-01-31 07:52:55,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-31 07:52:55,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:52:55,119 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:52:55,151 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 07:52:55,344 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 07:52:55,344 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:52:55,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:52:55,345 INFO L85 PathProgramCache]: Analyzing trace with hash 494535549, now seen corresponding path program 4 times [2022-01-31 07:52:55,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:52:55,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301225725] [2022-01-31 07:52:55,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:52:55,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:52:55,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:55,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:52:55,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:55,586 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-01-31 07:52:55,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:52:55,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301225725] [2022-01-31 07:52:55,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301225725] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:52:55,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283474942] [2022-01-31 07:52:55,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 07:52:55,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:52:55,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:52:55,588 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 07:52:55,590 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 07:52:55,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 07:52:55,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:52:55,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 07:52:55,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:52:56,075 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-01-31 07:52:56,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:52:56,540 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-01-31 07:52:56,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283474942] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:52:56,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:52:56,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-01-31 07:52:56,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327820814] [2022-01-31 07:52:56,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:52:56,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 07:52:56,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:52:56,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 07:52:56,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 07:52:56,543 INFO L87 Difference]: Start difference. First operand 166 states and 176 transitions. Second operand has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 27 states have internal predecessors, (95), 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 07:52:57,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:52:57,013 INFO L93 Difference]: Finished difference Result 192 states and 202 transitions. [2022-01-31 07:52:57,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 07:52:57,013 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 27 states have internal predecessors, (95), 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 161 [2022-01-31 07:52:57,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:52:57,015 INFO L225 Difference]: With dead ends: 192 [2022-01-31 07:52:57,015 INFO L226 Difference]: Without dead ends: 192 [2022-01-31 07:52:57,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1002, Invalid=1650, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 07:52:57,017 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 108 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:52:57,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 65 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:52:57,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-01-31 07:52:57,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-01-31 07:52:57,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 186 states have (on average 1.0591397849462365) internal successors, (197), 186 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:52:57,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 202 transitions. [2022-01-31 07:52:57,026 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 202 transitions. Word has length 161 [2022-01-31 07:52:57,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:52:57,026 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 202 transitions. [2022-01-31 07:52:57,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 27 states have internal predecessors, (95), 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 07:52:57,027 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 202 transitions. [2022-01-31 07:52:57,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 07:52:57,029 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:52:57,029 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:52:57,056 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 07:52:57,244 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 07:52:57,244 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:52:57,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:52:57,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1922094077, now seen corresponding path program 5 times [2022-01-31 07:52:57,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:52:57,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642076608] [2022-01-31 07:52:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:52:57,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:52:57,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:57,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:52:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:57,664 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-01-31 07:52:57,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:52:57,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642076608] [2022-01-31 07:52:57,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642076608] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:52:57,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722841095] [2022-01-31 07:52:57,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 07:52:57,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:52:57,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:52:57,668 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 07:52:57,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process