/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_copy2_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 07:38:03,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 07:38:03,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 07:38:04,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 07:38:04,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 07:38:04,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 07:38:04,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 07:38:04,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 07:38:04,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 07:38:04,040 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 07:38:04,041 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 07:38:04,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 07:38:04,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 07:38:04,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 07:38:04,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 07:38:04,044 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 07:38:04,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 07:38:04,045 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 07:38:04,046 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 07:38:04,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 07:38:04,052 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 07:38:04,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 07:38:04,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 07:38:04,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 07:38:04,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 07:38:04,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 07:38:04,058 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 07:38:04,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 07:38:04,059 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 07:38:04,060 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 07:38:04,060 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 07:38:04,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 07:38:04,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 07:38:04,062 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 07:38:04,063 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 07:38:04,063 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 07:38:04,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 07:38:04,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 07:38:04,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 07:38:04,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 07:38:04,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 07:38:04,066 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 07:38:04,081 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 07:38:04,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 07:38:04,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 07:38:04,083 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 07:38:04,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 07:38:04,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 07:38:04,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 07:38:04,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 07:38:04,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 07:38:04,083 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 07:38:04,084 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 07:38:04,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 07:38:04,084 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 07:38:04,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 07:38:04,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 07:38:04,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 07:38:04,085 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 07:38:04,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 07:38:04,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:38:04,085 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 07:38:04,086 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 07:38:04,086 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 07:38:04,086 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 07:38:04,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 07:38:04,330 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 07:38:04,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 07:38:04,333 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 07:38:04,334 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 07:38:04,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy2_ground-2.i [2022-01-31 07:38:04,400 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85a13009b/f5aeb5e7601044b2a12e9174cba15c90/FLAGdf2c5cbf7 [2022-01-31 07:38:04,769 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 07:38:04,769 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy2_ground-2.i [2022-01-31 07:38:04,783 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85a13009b/f5aeb5e7601044b2a12e9174cba15c90/FLAGdf2c5cbf7 [2022-01-31 07:38:04,793 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85a13009b/f5aeb5e7601044b2a12e9174cba15c90 [2022-01-31 07:38:04,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 07:38:04,796 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 07:38:04,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 07:38:04,798 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 07:38:04,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 07:38:04,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:38:04" (1/1) ... [2022-01-31 07:38:04,803 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@217041b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:04, skipping insertion in model container [2022-01-31 07:38:04,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:38:04" (1/1) ... [2022-01-31 07:38:04,809 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 07:38:04,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 07:38:04,949 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_copy2_ground-2.i[816,829] [2022-01-31 07:38:04,969 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:38:04,975 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 07:38:04,997 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_copy2_ground-2.i[816,829] [2022-01-31 07:38:05,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:38:05,019 INFO L208 MainTranslator]: Completed translation [2022-01-31 07:38:05,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:05 WrapperNode [2022-01-31 07:38:05,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 07:38:05,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 07:38:05,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 07:38:05,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 07:38:05,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:05" (1/1) ... [2022-01-31 07:38:05,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:05" (1/1) ... [2022-01-31 07:38:05,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:05" (1/1) ... [2022-01-31 07:38:05,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:05" (1/1) ... [2022-01-31 07:38:05,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:05" (1/1) ... [2022-01-31 07:38:05,048 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:05" (1/1) ... [2022-01-31 07:38:05,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:05" (1/1) ... [2022-01-31 07:38:05,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 07:38:05,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 07:38:05,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 07:38:05,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 07:38:05,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:05" (1/1) ... [2022-01-31 07:38:05,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:38:05,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:38:05,080 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 07:38:05,091 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 07:38:05,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 07:38:05,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 07:38:05,115 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 07:38:05,115 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 07:38:05,115 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 07:38:05,115 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 07:38:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 07:38:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 07:38:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 07:38:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 07:38:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 07:38:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 07:38:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 07:38:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 07:38:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 07:38:05,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 07:38:05,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 07:38:05,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 07:38:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 07:38:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 07:38:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 07:38:05,176 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 07:38:05,177 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 07:38:05,292 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 07:38:05,297 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 07:38:05,298 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-31 07:38:05,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:38:05 BoogieIcfgContainer [2022-01-31 07:38:05,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 07:38:05,300 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 07:38:05,300 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 07:38:05,301 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 07:38:05,304 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:38:05" (1/1) ... [2022-01-31 07:38:05,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:38:05 BasicIcfg [2022-01-31 07:38:05,344 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 07:38:05,346 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 07:38:05,346 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 07:38:05,349 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 07:38:05,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:38:04" (1/4) ... [2022-01-31 07:38:05,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c9b6d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:38:05, skipping insertion in model container [2022-01-31 07:38:05,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:05" (2/4) ... [2022-01-31 07:38:05,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c9b6d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:38:05, skipping insertion in model container [2022-01-31 07:38:05,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:38:05" (3/4) ... [2022-01-31 07:38:05,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c9b6d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 07:38:05, skipping insertion in model container [2022-01-31 07:38:05,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:38:05" (4/4) ... [2022-01-31 07:38:05,366 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-2.iJordan [2022-01-31 07:38:05,370 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 07:38:05,371 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 07:38:05,446 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 07:38:05,459 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 07:38:05,460 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 07:38:05,474 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 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 07:38:05,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 07:38:05,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:38:05,491 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 07:38:05,492 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:38:05,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:38:05,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1956623767, now seen corresponding path program 1 times [2022-01-31 07:38:05,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:38:05,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997221989] [2022-01-31 07:38:05,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:05,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:38:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:05,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:38:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:05,743 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 07:38:05,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:38:05,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997221989] [2022-01-31 07:38:05,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997221989] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:38:05,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:38:05,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 07:38:05,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746168602] [2022-01-31 07:38:05,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:38:05,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:38:05,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:38:05,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:38:05,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 07:38:05,786 INFO L87 Difference]: Start difference. First operand has 30 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 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 07:38:05,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:38:05,826 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-01-31 07:38:05,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:38:05,830 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 07:38:05,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:38:05,836 INFO L225 Difference]: With dead ends: 30 [2022-01-31 07:38:05,837 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 07:38:05,839 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 07:38:05,843 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 35 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 07:38:05,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 35 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:38:05,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 07:38:05,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-31 07:38:05,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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 07:38:05,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-01-31 07:38:05,877 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2022-01-31 07:38:05,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:38:05,878 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-01-31 07:38:05,878 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 07:38:05,879 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-01-31 07:38:05,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 07:38:05,880 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:38:05,880 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 07:38:05,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 07:38:05,881 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:38:05,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:38:05,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1418392747, now seen corresponding path program 1 times [2022-01-31 07:38:05,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:38:05,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560694394] [2022-01-31 07:38:05,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:05,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:38:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:05,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:38:05,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:05,977 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 07:38:05,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:38:05,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560694394] [2022-01-31 07:38:05,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560694394] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:38:05,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:38:05,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 07:38:05,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343519753] [2022-01-31 07:38:05,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:38:05,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 07:38:05,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:38:05,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 07:38:05,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 07:38:05,981 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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 07:38:06,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:38:06,033 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-01-31 07:38:06,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 07:38:06,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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 07:38:06,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:38:06,034 INFO L225 Difference]: With dead ends: 27 [2022-01-31 07:38:06,034 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 07:38:06,035 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 07:38:06,037 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 23 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:38:06,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 32 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:38:06,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 07:38:06,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-01-31 07:38:06,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 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 07:38:06,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-01-31 07:38:06,042 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2022-01-31 07:38:06,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:38:06,043 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-01-31 07:38:06,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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 07:38:06,043 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-01-31 07:38:06,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 07:38:06,044 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:38:06,044 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 07:38:06,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 07:38:06,044 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:38:06,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:38:06,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1900490825, now seen corresponding path program 1 times [2022-01-31 07:38:06,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:38:06,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536015285] [2022-01-31 07:38:06,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:06,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:38:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:06,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:38:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:06,100 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 07:38:06,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:38:06,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536015285] [2022-01-31 07:38:06,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536015285] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:38:06,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526468740] [2022-01-31 07:38:06,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:06,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:38:06,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:38:06,104 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 07:38:06,145 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 07:38:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:06,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 07:38:06,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:38:06,272 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 07:38:06,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 07:38:06,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526468740] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:38:06,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 07:38:06,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 07:38:06,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664336185] [2022-01-31 07:38:06,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:38:06,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:38:06,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:38:06,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:38:06,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 07:38:06,275 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 07:38:06,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:38:06,298 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-01-31 07:38:06,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:38:06,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 19 [2022-01-31 07:38:06,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:38:06,299 INFO L225 Difference]: With dead ends: 30 [2022-01-31 07:38:06,300 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 07:38:06,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 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 07:38:06,301 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:38:06,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 44 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:38:06,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 07:38:06,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-01-31 07:38:06,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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 07:38:06,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-01-31 07:38:06,306 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 19 [2022-01-31 07:38:06,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:38:06,306 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-01-31 07:38:06,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 07:38:06,307 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-01-31 07:38:06,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 07:38:06,307 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:38:06,307 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] [2022-01-31 07:38:06,337 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 07:38:06,523 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 07:38:06,524 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:38:06,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:38:06,525 INFO L85 PathProgramCache]: Analyzing trace with hash 550681381, now seen corresponding path program 1 times [2022-01-31 07:38:06,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:38:06,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097457451] [2022-01-31 07:38:06,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:06,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:38:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:06,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:38:06,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:06,607 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 07:38:06,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:38:06,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097457451] [2022-01-31 07:38:06,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097457451] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:38:06,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484106390] [2022-01-31 07:38:06,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:06,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:38:06,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:38:06,609 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 07:38:06,614 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 07:38:06,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:06,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 07:38:06,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:38:06,751 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 07:38:06,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:38:06,830 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 07:38:06,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484106390] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:38:06,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:38:06,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 07:38:06,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032977129] [2022-01-31 07:38:06,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:38:06,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 07:38:06,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:38:06,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 07:38:06,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 07:38:06,841 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 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 07:38:06,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:38:06,941 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-01-31 07:38:06,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 07:38:06,942 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 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 23 [2022-01-31 07:38:06,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:38:06,944 INFO L225 Difference]: With dead ends: 34 [2022-01-31 07:38:06,944 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 07:38:06,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 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 07:38:06,949 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 30 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:38:06,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 32 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:38:06,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 07:38:06,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-01-31 07:38:06,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 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 07:38:06,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-01-31 07:38:06,964 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23 [2022-01-31 07:38:06,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:38:06,965 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-01-31 07:38:06,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 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 07:38:06,965 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-01-31 07:38:06,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 07:38:06,966 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:38:06,966 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] [2022-01-31 07:38:06,995 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 07:38:07,187 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 07:38:07,188 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:38:07,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:38:07,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1525797887, now seen corresponding path program 2 times [2022-01-31 07:38:07,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:38:07,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948308277] [2022-01-31 07:38:07,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:07,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:38:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:07,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:38:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:07,245 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-31 07:38:07,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:38:07,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948308277] [2022-01-31 07:38:07,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948308277] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:38:07,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318566660] [2022-01-31 07:38:07,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:38:07,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:38:07,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:38:07,248 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 07:38:07,272 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 07:38:07,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:38:07,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:38:07,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 07:38:07,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:38:07,374 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-31 07:38:07,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:38:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-31 07:38:07,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318566660] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:38:07,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:38:07,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 07:38:07,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928514418] [2022-01-31 07:38:07,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:38:07,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 07:38:07,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:38:07,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 07:38:07,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 07:38:07,432 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 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 07:38:07,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:38:07,531 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-01-31 07:38:07,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 07:38:07,531 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 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 07:38:07,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:38:07,532 INFO L225 Difference]: With dead ends: 46 [2022-01-31 07:38:07,532 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 07:38:07,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 07:38:07,533 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:38:07,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 40 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:38:07,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 07:38:07,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-01-31 07:38:07,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 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 07:38:07,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-01-31 07:38:07,538 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 29 [2022-01-31 07:38:07,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:38:07,538 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-01-31 07:38:07,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 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 07:38:07,538 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-01-31 07:38:07,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 07:38:07,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:38:07,539 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:38:07,556 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 07:38:07,740 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 07:38:07,740 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:38:07,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:38:07,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1527563885, now seen corresponding path program 3 times [2022-01-31 07:38:07,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:38:07,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824827316] [2022-01-31 07:38:07,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:07,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:38:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:07,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:38:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:07,894 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 07:38:07,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:38:07,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824827316] [2022-01-31 07:38:07,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824827316] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:38:07,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797956684] [2022-01-31 07:38:07,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 07:38:07,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:38:07,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:38:07,897 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 07:38:07,925 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 07:38:08,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 07:38:08,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:38:08,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 07:38:08,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:38:08,122 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 07:38:08,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:38:08,238 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 07:38:08,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797956684] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:38:08,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:38:08,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-01-31 07:38:08,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919225745] [2022-01-31 07:38:08,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:38:08,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 07:38:08,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:38:08,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 07:38:08,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-01-31 07:38:08,242 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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 07:38:08,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:38:08,560 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2022-01-31 07:38:08,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 07:38:08,561 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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 41 [2022-01-31 07:38:08,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:38:08,563 INFO L225 Difference]: With dead ends: 73 [2022-01-31 07:38:08,563 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 07:38:08,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 07:38:08,564 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 85 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:38:08,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 43 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:38:08,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 07:38:08,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2022-01-31 07:38:08,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 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 07:38:08,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2022-01-31 07:38:08,570 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 41 [2022-01-31 07:38:08,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:38:08,571 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2022-01-31 07:38:08,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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 07:38:08,571 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2022-01-31 07:38:08,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 07:38:08,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:38:08,572 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:38:08,597 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 07:38:08,787 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 07:38:08,788 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:38:08,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:38:08,788 INFO L85 PathProgramCache]: Analyzing trace with hash -872195495, now seen corresponding path program 4 times [2022-01-31 07:38:08,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:38:08,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811288932] [2022-01-31 07:38:08,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:08,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:38:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:08,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:38:08,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-01-31 07:38:08,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:38:08,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811288932] [2022-01-31 07:38:08,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811288932] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:38:08,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650777513] [2022-01-31 07:38:08,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 07:38:08,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:38:08,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:38:08,936 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 07:38:08,963 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 07:38:09,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 07:38:09,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:38:09,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 07:38:09,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:38:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-01-31 07:38:09,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:38:09,287 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-01-31 07:38:09,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650777513] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:38:09,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:38:09,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-01-31 07:38:09,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143982404] [2022-01-31 07:38:09,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:38:09,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 07:38:09,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:38:09,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 07:38:09,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 07:38:09,290 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 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 07:38:09,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:38:09,473 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2022-01-31 07:38:09,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 07:38:09,474 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 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 67 [2022-01-31 07:38:09,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:38:09,477 INFO L225 Difference]: With dead ends: 86 [2022-01-31 07:38:09,477 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 07:38:09,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=288, Invalid=468, Unknown=0, NotChecked=0, Total=756 [2022-01-31 07:38:09,479 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 44 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:38:09,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 37 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:38:09,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 07:38:09,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-01-31 07:38:09,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 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 07:38:09,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2022-01-31 07:38:09,494 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 67 [2022-01-31 07:38:09,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:38:09,494 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2022-01-31 07:38:09,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 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 07:38:09,495 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2022-01-31 07:38:09,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 07:38:09,496 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:38:09,496 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:38:09,525 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 07:38:09,722 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 07:38:09,723 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:38:09,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:38:09,724 INFO L85 PathProgramCache]: Analyzing trace with hash -668000853, now seen corresponding path program 5 times [2022-01-31 07:38:09,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:38:09,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306297928] [2022-01-31 07:38:09,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:09,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:38:09,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:09,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:38:09,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-01-31 07:38:09,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:38:09,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306297928] [2022-01-31 07:38:09,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306297928] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:38:09,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635469980] [2022-01-31 07:38:09,898 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 07:38:09,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:38:09,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:38:09,904 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 07:38:09,923 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 07:39:56,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-01-31 07:39:56,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:39:56,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 07:39:56,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:39:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-01-31 07:39:57,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:39:57,409 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-01-31 07:39:57,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635469980] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:39:57,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:39:57,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 38 [2022-01-31 07:39:57,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055661403] [2022-01-31 07:39:57,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:39:57,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 07:39:57,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:39:57,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 07:39:57,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1024, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 07:39:57,413 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 37 states have internal predecessors, (90), 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 07:39:58,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:39:58,254 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2022-01-31 07:39:58,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 07:39:58,254 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 37 states have internal predecessors, (90), 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 81 [2022-01-31 07:39:58,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:39:58,255 INFO L225 Difference]: With dead ends: 137 [2022-01-31 07:39:58,255 INFO L226 Difference]: Without dead ends: 137 [2022-01-31 07:39:58,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1140, Invalid=4116, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 07:39:58,258 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 160 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 07:39:58,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 68 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 07:39:58,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-31 07:39:58,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2022-01-31 07:39:58,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 130 states have (on average 1.0307692307692307) internal successors, (134), 130 states have internal predecessors, (134), 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 07:39:58,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 139 transitions. [2022-01-31 07:39:58,264 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 139 transitions. Word has length 81 [2022-01-31 07:39:58,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:39:58,265 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 139 transitions. [2022-01-31 07:39:58,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 37 states have internal predecessors, (90), 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 07:39:58,265 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 139 transitions. [2022-01-31 07:39:58,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 07:39:58,266 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:39:58,267 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:39:58,345 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 07:39:58,483 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 07:39:58,484 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:39:58,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:39:58,484 INFO L85 PathProgramCache]: Analyzing trace with hash 196919193, now seen corresponding path program 6 times [2022-01-31 07:39:58,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:39:58,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173936091] [2022-01-31 07:39:58,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:39:58,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:39:58,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:39:58,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:39:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:39:58,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2022-01-31 07:39:58,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:39:58,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173936091] [2022-01-31 07:39:58,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173936091] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:39:58,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285172920] [2022-01-31 07:39:58,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 07:39:58,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:39:58,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:39:58,735 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 07:39:58,742 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 07:41:08,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2022-01-31 07:41:08,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:41:08,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 07:41:08,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:41:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2022-01-31 07:41:09,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:41:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2022-01-31 07:41:09,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285172920] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:41:09,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:41:09,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 25, 25] total 63 [2022-01-31 07:41:09,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927018093] [2022-01-31 07:41:09,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:41:09,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 07:41:09,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:41:09,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 07:41:09,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1249, Invalid=2657, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 07:41:09,896 INFO L87 Difference]: Start difference. First operand 136 states and 139 transitions. Second operand has 63 states, 63 states have (on average 2.2857142857142856) internal successors, (144), 62 states have internal predecessors, (144), 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 07:41:11,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:41:11,750 INFO L93 Difference]: Finished difference Result 235 states and 238 transitions. [2022-01-31 07:41:11,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 07:41:11,750 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.2857142857142856) internal successors, (144), 62 states have internal predecessors, (144), 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 131 [2022-01-31 07:41:11,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:41:11,752 INFO L225 Difference]: With dead ends: 235 [2022-01-31 07:41:11,752 INFO L226 Difference]: Without dead ends: 235 [2022-01-31 07:41:11,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2920 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3741, Invalid=11265, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 07:41:11,760 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 355 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 07:41:11,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 63 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 07:41:11,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-01-31 07:41:11,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 234. [2022-01-31 07:41:11,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 228 states have (on average 1.0175438596491229) internal successors, (232), 228 states have internal predecessors, (232), 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 07:41:11,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 237 transitions. [2022-01-31 07:41:11,784 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 237 transitions. Word has length 131 [2022-01-31 07:41:11,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:41:11,784 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 237 transitions. [2022-01-31 07:41:11,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.2857142857142856) internal successors, (144), 62 states have internal predecessors, (144), 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 07:41:11,785 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 237 transitions. [2022-01-31 07:41:11,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-01-31 07:41:11,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:41:11,794 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:41:11,853 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 07:41:12,007 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 07:41:12,008 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:41:12,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:41:12,008 INFO L85 PathProgramCache]: Analyzing trace with hash -554939305, now seen corresponding path program 7 times [2022-01-31 07:41:12,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:41:12,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942896724] [2022-01-31 07:41:12,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:41:12,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:41:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:41:12,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:41:12,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:41:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4428 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2022-01-31 07:41:12,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:41:12,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942896724] [2022-01-31 07:41:12,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942896724] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:41:12,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528826448] [2022-01-31 07:41:12,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 07:41:12,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:41:12,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:41:12,343 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 07:41:12,371 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 07:41:12,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:41:12,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 07:41:12,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:41:12,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4428 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2022-01-31 07:41:12,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:41:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4428 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2022-01-31 07:41:13,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528826448] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:41:13,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:41:13,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-01-31 07:41:13,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885172326] [2022-01-31 07:41:13,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:41:13,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 07:41:13,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:41:13,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 07:41:13,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 07:41:13,471 INFO L87 Difference]: Start difference. First operand 234 states and 237 transitions. Second operand has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 states have internal predecessors, (79), 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 07:41:14,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:41:14,009 INFO L93 Difference]: Finished difference Result 266 states and 269 transitions. [2022-01-31 07:41:14,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 07:41:14,010 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 states have internal predecessors, (79), 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 229 [2022-01-31 07:41:14,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:41:14,011 INFO L225 Difference]: With dead ends: 266 [2022-01-31 07:41:14,011 INFO L226 Difference]: Without dead ends: 266 [2022-01-31 07:41:14,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1521, Invalid=2511, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 07:41:14,013 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 95 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:41:14,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 52 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:41:14,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-01-31 07:41:14,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2022-01-31 07:41:14,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 260 states have (on average 1.0153846153846153) internal successors, (264), 260 states have internal predecessors, (264), 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 07:41:14,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 269 transitions. [2022-01-31 07:41:14,032 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 269 transitions. Word has length 229 [2022-01-31 07:41:14,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:41:14,033 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 269 transitions. [2022-01-31 07:41:14,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 states have internal predecessors, (79), 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 07:41:14,033 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 269 transitions. [2022-01-31 07:41:14,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-01-31 07:41:14,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:41:14,037 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:41:14,064 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 07:41:14,237 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 07:41:14,238 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:41:14,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:41:14,238 INFO L85 PathProgramCache]: Analyzing trace with hash -35450313, now seen corresponding path program 8 times [2022-01-31 07:41:14,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:41:14,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814918848] [2022-01-31 07:41:14,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:41:14,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:41:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:41:14,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:41:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:41:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5132 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2022-01-31 07:41:14,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:41:14,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814918848] [2022-01-31 07:41:14,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814918848] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:41:14,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808555868] [2022-01-31 07:41:14,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:41:14,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:41:14,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:41:14,819 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 07:41:14,840 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 07:41:15,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:41:15,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:41:15,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-31 07:41:15,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:41:15,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5132 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2022-01-31 07:41:15,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:41:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5132 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2022-01-31 07:41:16,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808555868] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:41:16,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:41:16,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-01-31 07:41:16,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232625188] [2022-01-31 07:41:16,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:41:16,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 07:41:16,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:41:16,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 07:41:16,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 07:41:16,711 INFO L87 Difference]: Start difference. First operand 266 states and 269 transitions. Second operand has 66 states, 66 states have (on average 2.1666666666666665) internal successors, (143), 65 states have internal predecessors, (143), 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 07:41:18,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:41:18,265 INFO L93 Difference]: Finished difference Result 330 states and 333 transitions. [2022-01-31 07:41:18,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 07:41:18,265 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.1666666666666665) internal successors, (143), 65 states have internal predecessors, (143), 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 261 [2022-01-31 07:41:18,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:41:18,267 INFO L225 Difference]: With dead ends: 330 [2022-01-31 07:41:18,267 INFO L226 Difference]: Without dead ends: 330 [2022-01-31 07:41:18,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2536 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6113, Invalid=10143, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 07:41:18,271 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 144 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:41:18,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 52 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 07:41:18,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-01-31 07:41:18,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2022-01-31 07:41:18,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 324 states have (on average 1.0123456790123457) internal successors, (328), 324 states have internal predecessors, (328), 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 07:41:18,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 333 transitions. [2022-01-31 07:41:18,278 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 333 transitions. Word has length 261 [2022-01-31 07:41:18,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:41:18,278 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 333 transitions. [2022-01-31 07:41:18,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.1666666666666665) internal successors, (143), 65 states have internal predecessors, (143), 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 07:41:18,279 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 333 transitions. [2022-01-31 07:41:18,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2022-01-31 07:41:18,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:41:18,283 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:41:18,311 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 07:41:18,503 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 07:41:18,504 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:41:18,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:41:18,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1289609737, now seen corresponding path program 9 times [2022-01-31 07:41:18,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:41:18,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133896846] [2022-01-31 07:41:18,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:41:18,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:41:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:41:20,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:41:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:41:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8076 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2022-01-31 07:41:20,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:41:20,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133896846] [2022-01-31 07:41:20,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133896846] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:41:20,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580122780] [2022-01-31 07:41:20,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 07:41:20,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:41:20,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:41:20,112 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 07:41:20,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process