/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_strcmp_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:08:03,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:08:03,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:08:03,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 08:08:03,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 08:08:03,785 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 08:08:03,786 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 08:08:03,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 08:08:03,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 08:08:03,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 08:08:03,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 08:08:03,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 08:08:03,793 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:08:03,794 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:08:03,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:08:03,795 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:08:03,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:08:03,796 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:08:03,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:08:03,799 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:08:03,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:08:03,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:08:03,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:08:03,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:08:03,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 08:08:03,809 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 08:08:03,809 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 08:08:03,809 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 08:08:03,810 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 08:08:03,810 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 08:08:03,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 08:08:03,811 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 08:08:03,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 08:08:03,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 08:08:03,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 08:08:03,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 08:08:03,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 08:08:03,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 08:08:03,814 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:08:03,815 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:08:03,815 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:08:03,816 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:08:03,822 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:08:03,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:08:03,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:08:03,824 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:08:03,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:08:03,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:08:03,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:08:03,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:08:03,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:08:03,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:08:03,824 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:08:03,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:08:03,825 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:08:03,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:08:03,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:08:03,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:08:03,825 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:08:03,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:08:03,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:08:03,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:08:03,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:08:03,826 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:08:03,826 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:08:03,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:08:04,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:08:04,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:08:04,015 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:08:04,020 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:08:04,022 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_strcmp_ground.i [2022-01-31 08:08:04,067 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d67a92a22/6f9d66575ddb4b619f51853523cd9ce6/FLAG5d118f198 [2022-01-31 08:08:04,412 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:08:04,413 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_strcmp_ground.i [2022-01-31 08:08:04,421 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d67a92a22/6f9d66575ddb4b619f51853523cd9ce6/FLAG5d118f198 [2022-01-31 08:08:04,834 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d67a92a22/6f9d66575ddb4b619f51853523cd9ce6 [2022-01-31 08:08:04,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:08:04,837 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:08:04,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:08:04,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:08:04,842 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:08:04,843 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:08:04" (1/1) ... [2022-01-31 08:08:04,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75f68292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:04, skipping insertion in model container [2022-01-31 08:08:04,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:08:04" (1/1) ... [2022-01-31 08:08:04,848 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:08:04,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:08:04,955 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_strcmp_ground.i[815,828] [2022-01-31 08:08:04,987 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:08:04,992 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:08:04,999 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_strcmp_ground.i[815,828] [2022-01-31 08:08:05,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:08:05,011 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:08:05,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:05 WrapperNode [2022-01-31 08:08:05,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:08:05,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:08:05,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:08:05,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:08:05,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:05" (1/1) ... [2022-01-31 08:08:05,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:05" (1/1) ... [2022-01-31 08:08:05,024 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:05" (1/1) ... [2022-01-31 08:08:05,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:05" (1/1) ... [2022-01-31 08:08:05,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:05" (1/1) ... [2022-01-31 08:08:05,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:05" (1/1) ... [2022-01-31 08:08:05,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:05" (1/1) ... [2022-01-31 08:08:05,038 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:08:05,038 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:08:05,038 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:08:05,038 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:08:05,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:05" (1/1) ... [2022-01-31 08:08:05,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:08:05,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:08:05,067 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 08:08:05,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 08:08:05,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:08:05,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:08:05,094 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:08:05,094 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 08:08:05,094 INFO L138 BoogieDeclarations]: Found implementation of procedure _strcmp [2022-01-31 08:08:05,095 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:08:05,095 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:08:05,095 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:08:05,095 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 08:08:05,095 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 08:08:05,095 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:08:05,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:08:05,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 08:08:05,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 08:08:05,095 INFO L130 BoogieDeclarations]: Found specification of procedure _strcmp [2022-01-31 08:08:05,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:08:05,095 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:08:05,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:08:05,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:08:05,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:08:05,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:08:05,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:08:05,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:08:05,146 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:08:05,147 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:08:05,230 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:08:05,234 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:08:05,234 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 08:08:05,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:08:05 BoogieIcfgContainer [2022-01-31 08:08:05,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:08:05,236 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:08:05,236 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:08:05,239 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:08:05,242 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:08:05" (1/1) ... [2022-01-31 08:08:05,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:08:05 BasicIcfg [2022-01-31 08:08:05,256 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:08:05,257 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:08:05,257 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:08:05,272 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:08:05,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:08:04" (1/4) ... [2022-01-31 08:08:05,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@323eb8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:08:05, skipping insertion in model container [2022-01-31 08:08:05,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:05" (2/4) ... [2022-01-31 08:08:05,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@323eb8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:08:05, skipping insertion in model container [2022-01-31 08:08:05,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:08:05" (3/4) ... [2022-01-31 08:08:05,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@323eb8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:08:05, skipping insertion in model container [2022-01-31 08:08:05,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:08:05" (4/4) ... [2022-01-31 08:08:05,275 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_strcmp_ground.iJordan [2022-01-31 08:08:05,278 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:08:05,278 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:08:05,308 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:08:05,318 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 08:08:05,318 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:08:05,346 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:08:05,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 08:08:05,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:05,352 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] [2022-01-31 08:08:05,352 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:05,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:05,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1157437343, now seen corresponding path program 1 times [2022-01-31 08:08:05,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:05,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923417160] [2022-01-31 08:08:05,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:05,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:05,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:05,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:05,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:05,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:08:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:05,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:05,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923417160] [2022-01-31 08:08:05,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923417160] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:08:05,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:08:05,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 08:08:05,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694172035] [2022-01-31 08:08:05,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:08:05,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 08:08:05,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:08:05,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 08:08:05,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:08:05,612 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:08:05,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:08:05,680 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-01-31 08:08:05,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 08:08:05,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-01-31 08:08:05,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:08:05,686 INFO L225 Difference]: With dead ends: 34 [2022-01-31 08:08:05,686 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 08:08:05,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 08:08:05,690 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 27 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:08:05,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 41 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:08:05,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 08:08:05,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-01-31 08:08:05,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:08:05,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-01-31 08:08:05,711 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2022-01-31 08:08:05,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:08:05,711 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-01-31 08:08:05,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:08:05,711 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-01-31 08:08:05,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 08:08:05,712 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:05,712 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] [2022-01-31 08:08:05,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:08:05,712 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:05,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:05,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1043999100, now seen corresponding path program 1 times [2022-01-31 08:08:05,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:05,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263429888] [2022-01-31 08:08:05,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:05,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:05,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:05,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:08:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:05,766 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 08:08:05,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:05,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263429888] [2022-01-31 08:08:05,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263429888] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:08:05,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726594539] [2022-01-31 08:08:05,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:05,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:05,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:08:05,768 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:08:05,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 08:08:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:05,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:08:05,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:08:05,879 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 08:08:05,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:08:05,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726594539] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:08:05,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:08:05,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 08:08:05,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457411528] [2022-01-31 08:08:05,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:08:05,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:08:05,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:08:05,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:08:05,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:08:05,882 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:08:05,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:08:05,889 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-01-31 08:08:05,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:08:05,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-01-31 08:08:05,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:08:05,891 INFO L225 Difference]: With dead ends: 32 [2022-01-31 08:08:05,891 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 08:08:05,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 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 08:08:05,892 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 3 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:08:05,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:08:05,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 08:08:05,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2022-01-31 08:08:05,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:08:05,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-01-31 08:08:05,896 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 22 [2022-01-31 08:08:05,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:08:05,897 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-01-31 08:08:05,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:08:05,897 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-01-31 08:08:05,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 08:08:05,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:05,898 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] [2022-01-31 08:08:05,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 08:08:06,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:06,112 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:06,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:06,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1257503332, now seen corresponding path program 1 times [2022-01-31 08:08:06,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:06,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330318400] [2022-01-31 08:08:06,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:06,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:06,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:06,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:06,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:08:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:06,159 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 08:08:06,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:06,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330318400] [2022-01-31 08:08:06,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330318400] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:08:06,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60682280] [2022-01-31 08:08:06,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:06,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:06,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:08:06,161 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:08:06,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 08:08:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:06,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:08:06,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:08:06,270 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 08:08:06,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:08:06,330 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 08:08:06,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60682280] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:08:06,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:08:06,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:08:06,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354044231] [2022-01-31 08:08:06,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:08:06,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:08:06,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:08:06,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:08:06,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:08:06,334 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 08:08:06,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:08:06,408 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2022-01-31 08:08:06,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:08:06,409 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-01-31 08:08:06,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:08:06,412 INFO L225 Difference]: With dead ends: 35 [2022-01-31 08:08:06,412 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 08:08:06,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 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 08:08:06,416 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 30 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:08:06,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 33 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:08:06,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 08:08:06,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-31 08:08:06,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:08:06,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-01-31 08:08:06,425 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 22 [2022-01-31 08:08:06,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:08:06,425 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-01-31 08:08:06,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 08:08:06,425 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-01-31 08:08:06,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 08:08:06,426 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:06,426 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] [2022-01-31 08:08:06,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 08:08:06,639 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,SelfDestructingSolverStorable2 [2022-01-31 08:08:06,640 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:06,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:06,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1190704758, now seen corresponding path program 2 times [2022-01-31 08:08:06,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:06,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077327665] [2022-01-31 08:08:06,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:06,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:06,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:06,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 08:08:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:06,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 08:08:06,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:06,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077327665] [2022-01-31 08:08:06,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077327665] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:08:06,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:08:06,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 08:08:06,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277140437] [2022-01-31 08:08:06,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:08:06,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 08:08:06,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:08:06,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 08:08:06,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:08:06,735 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:08:06,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:08:06,797 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2022-01-31 08:08:06,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 08:08:06,798 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-01-31 08:08:06,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:08:06,798 INFO L225 Difference]: With dead ends: 39 [2022-01-31 08:08:06,798 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 08:08:06,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-31 08:08:06,799 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:08:06,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 44 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:08:06,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 08:08:06,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-31 08:08:06,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:08:06,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-01-31 08:08:06,802 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2022-01-31 08:08:06,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:08:06,803 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-01-31 08:08:06,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:08:06,803 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-01-31 08:08:06,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 08:08:06,803 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:06,804 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:08:06,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 08:08:06,804 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:06,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:06,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1775401859, now seen corresponding path program 1 times [2022-01-31 08:08:06,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:06,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472402531] [2022-01-31 08:08:06,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:06,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:06,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:06,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:06,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 08:08:06,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:06,865 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 08:08:06,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:06,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472402531] [2022-01-31 08:08:06,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472402531] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:08:06,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536735230] [2022-01-31 08:08:06,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:06,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:06,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:08:06,870 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:08:06,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 08:08:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:06,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:08:06,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:08:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:08:07,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:08:07,153 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:08:07,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536735230] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:08:07,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:08:07,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-01-31 08:08:07,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484198842] [2022-01-31 08:08:07,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:08:07,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 08:08:07,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:08:07,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 08:08:07,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-31 08:08:07,155 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:08:07,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:08:07,357 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2022-01-31 08:08:07,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 08:08:07,358 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-01-31 08:08:07,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:08:07,358 INFO L225 Difference]: With dead ends: 50 [2022-01-31 08:08:07,358 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 08:08:07,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2022-01-31 08:08:07,360 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 48 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:08:07,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 45 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:08:07,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 08:08:07,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-01-31 08:08:07,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:08:07,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2022-01-31 08:08:07,363 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 30 [2022-01-31 08:08:07,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:08:07,363 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2022-01-31 08:08:07,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:08:07,364 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2022-01-31 08:08:07,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 08:08:07,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:07,364 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:08:07,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 08:08:07,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:07,577 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:07,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:07,578 INFO L85 PathProgramCache]: Analyzing trace with hash 923343336, now seen corresponding path program 2 times [2022-01-31 08:08:07,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:07,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764864574] [2022-01-31 08:08:07,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:07,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:07,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:07,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 08:08:07,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:07,726 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 08:08:07,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:07,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764864574] [2022-01-31 08:08:07,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764864574] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:08:07,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885825649] [2022-01-31 08:08:07,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:08:07,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:07,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:08:07,728 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:08:07,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 08:08:07,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:08:07,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:08:07,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 08:08:07,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:08:07,881 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 08:08:07,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:08:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 08:08:08,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885825649] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:08:08,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:08:08,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-31 08:08:08,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726278883] [2022-01-31 08:08:08,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:08:08,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 08:08:08,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:08:08,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 08:08:08,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 08:08:08,062 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 08:08:08,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:08:08,397 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2022-01-31 08:08:08,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 08:08:08,397 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-01-31 08:08:08,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:08:08,398 INFO L225 Difference]: With dead ends: 73 [2022-01-31 08:08:08,398 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 08:08:08,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 08:08:08,399 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 63 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:08:08,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 47 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:08:08,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 08:08:08,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-01-31 08:08:08,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:08:08,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2022-01-31 08:08:08,403 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 44 [2022-01-31 08:08:08,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:08:08,404 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2022-01-31 08:08:08,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 08:08:08,404 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2022-01-31 08:08:08,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 08:08:08,405 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:08,405 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:08:08,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 08:08:08,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:08,616 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:08,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:08,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1078024576, now seen corresponding path program 3 times [2022-01-31 08:08:08,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:08,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941960990] [2022-01-31 08:08:08,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:08,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:08,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:08,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:08,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 08:08:08,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 08:08:08,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:08,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941960990] [2022-01-31 08:08:08,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941960990] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:08:08,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834237392] [2022-01-31 08:08:08,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:08:08,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:08,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:08:08,968 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:08:08,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 08:08:09,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 08:08:09,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:08:09,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 08:08:09,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:08:09,142 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-01-31 08:08:09,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:08:09,254 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-01-31 08:08:09,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834237392] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:08:09,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:08:09,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 5, 5] total 32 [2022-01-31 08:08:09,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974120829] [2022-01-31 08:08:09,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:08:09,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 08:08:09,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:08:09,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 08:08:09,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=663, Unknown=0, NotChecked=0, Total=992 [2022-01-31 08:08:09,256 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 08:08:09,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:08:09,695 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2022-01-31 08:08:09,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 08:08:09,695 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2022-01-31 08:08:09,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:08:09,696 INFO L225 Difference]: With dead ends: 84 [2022-01-31 08:08:09,696 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 08:08:09,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=981, Invalid=2679, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 08:08:09,698 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 80 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:08:09,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 45 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:08:09,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 08:08:09,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-01-31 08:08:09,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:08:09,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2022-01-31 08:08:09,702 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 68 [2022-01-31 08:08:09,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:08:09,702 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2022-01-31 08:08:09,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 08:08:09,702 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2022-01-31 08:08:09,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 08:08:09,710 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:09,710 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:08:09,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 08:08:09,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:09,911 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:09,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:09,911 INFO L85 PathProgramCache]: Analyzing trace with hash 980089542, now seen corresponding path program 4 times [2022-01-31 08:08:09,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:09,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848848048] [2022-01-31 08:08:09,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:09,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:10,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:10,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:10,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 08:08:10,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 08:08:10,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:10,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848848048] [2022-01-31 08:08:10,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848848048] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:08:10,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544787297] [2022-01-31 08:08:10,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:08:10,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:10,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:08:10,258 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:08:10,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 08:08:10,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:08:10,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:08:10,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 08:08:10,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:08:10,567 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-01-31 08:08:10,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:08:10,787 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-01-31 08:08:10,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544787297] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:08:10,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:08:10,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 9, 9] total 41 [2022-01-31 08:08:10,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820675969] [2022-01-31 08:08:10,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:08:10,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 08:08:10,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:08:10,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 08:08:10,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=1194, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 08:08:10,789 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 08:08:11,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:08:11,457 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2022-01-31 08:08:11,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 08:08:11,457 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 78 [2022-01-31 08:08:11,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:08:11,458 INFO L225 Difference]: With dead ends: 102 [2022-01-31 08:08:11,458 INFO L226 Difference]: Without dead ends: 102 [2022-01-31 08:08:11,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1332, Invalid=4830, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 08:08:11,460 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 95 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:08:11,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 55 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:08:11,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-31 08:08:11,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2022-01-31 08:08:11,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 93 states have (on average 1.032258064516129) internal successors, (96), 93 states have internal predecessors, (96), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:08:11,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2022-01-31 08:08:11,464 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 78 [2022-01-31 08:08:11,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:08:11,465 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2022-01-31 08:08:11,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 08:08:11,465 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2022-01-31 08:08:11,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-31 08:08:11,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:11,466 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:08:11,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 08:08:11,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:11,688 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:11,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:11,688 INFO L85 PathProgramCache]: Analyzing trace with hash 97143664, now seen corresponding path program 5 times [2022-01-31 08:08:11,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:11,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381171000] [2022-01-31 08:08:11,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:11,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:11,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:11,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 08:08:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:11,991 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-01-31 08:08:11,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:11,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381171000] [2022-01-31 08:08:11,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381171000] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:08:11,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392646369] [2022-01-31 08:08:11,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:08:11,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:11,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:08:11,992 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:08:11,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 08:12:28,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2022-01-31 08:12:28,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:12:28,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 08:12:28,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:12:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2022-01-31 08:12:29,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:12:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2022-01-31 08:12:29,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392646369] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:12:29,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:12:29,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 17, 17] total 58 [2022-01-31 08:12:29,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872874472] [2022-01-31 08:12:29,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:12:29,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 08:12:29,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:12:29,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 08:12:29,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=848, Invalid=2458, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 08:12:29,709 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 58 states, 58 states have (on average 2.2586206896551726) internal successors, (131), 57 states have internal predecessors, (131), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 08:12:30,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:12:30,892 INFO L93 Difference]: Finished difference Result 136 states and 138 transitions. [2022-01-31 08:12:30,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 08:12:30,893 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.2586206896551726) internal successors, (131), 57 states have internal predecessors, (131), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 96 [2022-01-31 08:12:30,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:12:30,894 INFO L225 Difference]: With dead ends: 136 [2022-01-31 08:12:30,894 INFO L226 Difference]: Without dead ends: 136 [2022-01-31 08:12:30,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2670 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2538, Invalid=10118, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 08:12:30,897 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 144 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:12:30,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 55 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:12:30,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-01-31 08:12:30,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2022-01-31 08:12:30,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 127 states have (on average 1.0236220472440944) internal successors, (130), 127 states have internal predecessors, (130), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:12:30,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2022-01-31 08:12:30,902 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 96 [2022-01-31 08:12:30,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:12:30,902 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2022-01-31 08:12:30,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.2586206896551726) internal successors, (131), 57 states have internal predecessors, (131), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 08:12:30,903 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2022-01-31 08:12:30,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-31 08:12:30,903 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:12:30,904 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:12:30,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-31 08:12:31,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:12:31,120 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:12:31,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:12:31,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1722917730, now seen corresponding path program 6 times [2022-01-31 08:12:31,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:12:31,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667291710] [2022-01-31 08:12:31,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:12:31,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:12:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:12:31,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:12:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:12:31,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 08:12:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:12:31,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2022-01-31 08:12:31,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:12:31,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667291710] [2022-01-31 08:12:31,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667291710] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:12:31,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578033100] [2022-01-31 08:12:31,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 08:12:31,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:12:31,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:12:31,479 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:12:31,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 08:12:31,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-31 08:12:31,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:12:31,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-31 08:12:31,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:12:32,050 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-31 08:12:32,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-01-31 08:12:32,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 1466 trivial. 0 not checked. [2022-01-31 08:12:32,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:12:32,409 INFO L353 Elim1Store]: treesize reduction 23, result has 74.7 percent of original size [2022-01-31 08:12:32,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 75 [2022-01-31 08:12:32,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 29 proven. 30 refuted. 0 times theorem prover too weak. 1466 trivial. 0 not checked. [2022-01-31 08:12:32,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578033100] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:12:32,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:12:32,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 11, 10] total 42 [2022-01-31 08:12:32,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81568079] [2022-01-31 08:12:32,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:12:32,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 08:12:32,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:12:32,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 08:12:32,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 08:12:32,681 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 42 states, 41 states have (on average 2.292682926829268) internal successors, (94), 40 states have internal predecessors, (94), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 08:12:33,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:12:33,579 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2022-01-31 08:12:33,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 08:12:33,580 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.292682926829268) internal successors, (94), 40 states have internal predecessors, (94), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 130 [2022-01-31 08:12:33,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:12:33,580 INFO L225 Difference]: With dead ends: 146 [2022-01-31 08:12:33,581 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 08:12:33,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1282, Invalid=4570, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 08:12:33,582 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 104 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:12:33,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 103 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:12:33,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 08:12:33,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2022-01-31 08:12:33,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 134 states have internal predecessors, (136), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:12:33,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2022-01-31 08:12:33,588 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 130 [2022-01-31 08:12:33,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:12:33,588 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2022-01-31 08:12:33,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.292682926829268) internal successors, (94), 40 states have internal predecessors, (94), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 08:12:33,588 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2022-01-31 08:12:33,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-31 08:12:33,589 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:12:33,589 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:12:33,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 08:12:33,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 08:12:33,811 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:12:33,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:12:33,812 INFO L85 PathProgramCache]: Analyzing trace with hash 392549046, now seen corresponding path program 1 times [2022-01-31 08:12:33,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:12:33,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065798043] [2022-01-31 08:12:33,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:12:33,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:12:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:12:34,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:12:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:12:34,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 08:12:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:12:34,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 08:12:34,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:12:34,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 2 proven. 676 refuted. 0 times theorem prover too weak. 902 trivial. 0 not checked. [2022-01-31 08:12:34,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:12:34,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065798043] [2022-01-31 08:12:34,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065798043] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:12:34,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653318310] [2022-01-31 08:12:34,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:12:34,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:12:34,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:12:34,180 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:12:34,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 08:12:34,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:12:34,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-31 08:12:34,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:12:34,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 904 trivial. 0 not checked. [2022-01-31 08:12:34,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:12:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 2 proven. 676 refuted. 0 times theorem prover too weak. 902 trivial. 0 not checked. [2022-01-31 08:12:35,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653318310] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:12:35,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:12:35,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-01-31 08:12:35,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303658336] [2022-01-31 08:12:35,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:12:35,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 08:12:35,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:12:35,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 08:12:35,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 08:12:35,448 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand has 58 states, 58 states have (on average 2.396551724137931) internal successors, (139), 57 states have internal predecessors, (139), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 08:12:36,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:12:36,680 INFO L93 Difference]: Finished difference Result 199 states and 201 transitions. [2022-01-31 08:12:36,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 08:12:36,680 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.396551724137931) internal successors, (139), 57 states have internal predecessors, (139), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 140 [2022-01-31 08:12:36,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:12:36,681 INFO L225 Difference]: With dead ends: 199 [2022-01-31 08:12:36,681 INFO L226 Difference]: Without dead ends: 199 [2022-01-31 08:12:36,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1938 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4677, Invalid=7755, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 08:12:36,685 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 127 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:12:36,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 62 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:12:36,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-31 08:12:36,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2022-01-31 08:12:36,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 189 states have (on average 1.0158730158730158) internal successors, (192), 190 states have internal predecessors, (192), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:12:36,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2022-01-31 08:12:36,691 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 140 [2022-01-31 08:12:36,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:12:36,691 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2022-01-31 08:12:36,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.396551724137931) internal successors, (139), 57 states have internal predecessors, (139), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 08:12:36,692 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2022-01-31 08:12:36,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-01-31 08:12:36,693 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:12:36,693 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:12:36,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 08:12:36,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:12:36,902 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:12:36,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:12:36,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1082305646, now seen corresponding path program 2 times [2022-01-31 08:12:36,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:12:36,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15863243] [2022-01-31 08:12:36,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:12:36,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:12:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:12:37,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:12:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:12:37,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-01-31 08:12:37,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:12:37,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-01-31 08:12:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:12:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3820 backedges. 2 proven. 2916 refuted. 0 times theorem prover too weak. 902 trivial. 0 not checked. [2022-01-31 08:12:37,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:12:37,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15863243] [2022-01-31 08:12:37,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15863243] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:12:37,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486738694] [2022-01-31 08:12:37,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:12:37,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:12:37,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:12:37,987 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 08:12:38,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 08:12:38,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:12:38,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:12:38,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1319 conjuncts, 56 conjunts are in the unsatisfiable core [2022-01-31 08:12:38,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:12:38,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3820 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 904 trivial. 0 not checked. [2022-01-31 08:12:38,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:12:41,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3820 backedges. 2 proven. 2916 refuted. 0 times theorem prover too weak. 902 trivial. 0 not checked. [2022-01-31 08:12:41,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486738694] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:12:41,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:12:41,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 114 [2022-01-31 08:12:41,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712170459] [2022-01-31 08:12:41,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:12:41,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 08:12:41,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:12:41,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 08:12:41,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 08:12:41,312 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand has 114 states, 114 states have (on average 2.2017543859649122) internal successors, (251), 113 states have internal predecessors, (251), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 08:12:45,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:12:45,374 INFO L93 Difference]: Finished difference Result 311 states and 313 transitions. [2022-01-31 08:12:45,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 08:12:45,375 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.2017543859649122) internal successors, (251), 113 states have internal predecessors, (251), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 196 [2022-01-31 08:12:45,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:12:45,376 INFO L225 Difference]: With dead ends: 311 [2022-01-31 08:12:45,376 INFO L226 Difference]: Without dead ends: 311 [2022-01-31 08:12:45,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7804 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=18761, Invalid=31191, Unknown=0, NotChecked=0, Total=49952 [2022-01-31 08:12:45,380 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 239 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:12:45,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 52 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 08:12:45,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-01-31 08:12:45,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2022-01-31 08:12:45,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 301 states have (on average 1.0099667774086378) internal successors, (304), 302 states have internal predecessors, (304), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:12:45,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 313 transitions. [2022-01-31 08:12:45,393 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 313 transitions. Word has length 196 [2022-01-31 08:12:45,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:12:45,393 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 313 transitions. [2022-01-31 08:12:45,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.2017543859649122) internal successors, (251), 113 states have internal predecessors, (251), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 08:12:45,394 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 313 transitions. [2022-01-31 08:12:45,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-01-31 08:12:45,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:12:45,396 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:12:45,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 08:12:45,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 08:12:45,597 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:12:45,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:12:45,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1542797346, now seen corresponding path program 3 times [2022-01-31 08:12:45,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:12:45,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396308085] [2022-01-31 08:12:45,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:12:45,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:12:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:12:49,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:12:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:12:49,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2022-01-31 08:12:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:12:49,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 296 [2022-01-31 08:12:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:12:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 13004 backedges. 2 proven. 12100 refuted. 0 times theorem prover too weak. 902 trivial. 0 not checked. [2022-01-31 08:12:49,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:12:49,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396308085] [2022-01-31 08:12:49,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396308085] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:12:49,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055469671] [2022-01-31 08:12:49,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:12:49,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:12:49,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:12:49,341 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:12:49,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 08:12:49,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 08:12:49,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:12:49,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-31 08:12:49,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:12:50,336 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-01-31 08:12:50,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-01-31 08:12:50,942 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-31 08:12:50,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-01-31 08:12:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 13004 backedges. 2 proven. 118 refuted. 0 times theorem prover too weak. 12884 trivial. 0 not checked. [2022-01-31 08:12:51,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:12:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13004 backedges. 116 proven. 4 refuted. 0 times theorem prover too weak. 12884 trivial. 0 not checked. [2022-01-31 08:12:51,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055469671] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:12:51,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:12:51,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 13, 12] total 131 [2022-01-31 08:12:51,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393028136] [2022-01-31 08:12:51,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:12:51,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 08:12:51,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:12:51,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 08:12:51,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6380, Invalid=10650, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 08:12:51,877 INFO L87 Difference]: Start difference. First operand 311 states and 313 transitions. Second operand has 131 states, 130 states have (on average 2.146153846153846) internal successors, (279), 129 states have internal predecessors, (279), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 08:12:58,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:12:58,221 INFO L93 Difference]: Finished difference Result 324 states and 326 transitions. [2022-01-31 08:12:58,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 08:12:58,221 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 130 states have (on average 2.146153846153846) internal successors, (279), 129 states have internal predecessors, (279), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 308 [2022-01-31 08:12:58,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:12:58,223 INFO L225 Difference]: With dead ends: 324 [2022-01-31 08:12:58,223 INFO L226 Difference]: Without dead ends: 324 [2022-01-31 08:12:58,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 603 SyntacticMatches, 2 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9748 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=19334, Invalid=44422, Unknown=0, NotChecked=0, Total=63756 [2022-01-31 08:12:58,227 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 283 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 08:12:58,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 121 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 08:12:58,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-01-31 08:12:58,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 321. [2022-01-31 08:12:58,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 309 states have (on average 1.0097087378640777) internal successors, (312), 310 states have internal predecessors, (312), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 08:12:58,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 323 transitions. [2022-01-31 08:12:58,236 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 323 transitions. Word has length 308 [2022-01-31 08:12:58,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:12:58,236 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 323 transitions. [2022-01-31 08:12:58,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 130 states have (on average 2.146153846153846) internal successors, (279), 129 states have internal predecessors, (279), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 08:12:58,236 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 323 transitions. [2022-01-31 08:12:58,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-01-31 08:12:58,239 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:12:58,239 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 30, 30, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:12:58,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 08:12:58,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 08:12:58,451 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:12:58,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:12:58,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1857789618, now seen corresponding path program 4 times [2022-01-31 08:12:58,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:12:58,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527535810] [2022-01-31 08:12:58,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:12:58,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:12:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:13:02,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:13:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:13:02,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2022-01-31 08:13:02,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:13:02,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 298 [2022-01-31 08:13:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:13:02,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 306 [2022-01-31 08:13:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:13:02,287 INFO L134 CoverageAnalysis]: Checked inductivity of 13237 backedges. 4 proven. 12321 refuted. 0 times theorem prover too weak. 912 trivial. 0 not checked. [2022-01-31 08:13:02,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:13:02,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527535810] [2022-01-31 08:13:02,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527535810] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:13:02,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274172700] [2022-01-31 08:13:02,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:13:02,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:13:02,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:13:02,288 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:13:02,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 08:13:02,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:13:02,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:13:02,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 2305 conjuncts, 113 conjunts are in the unsatisfiable core [2022-01-31 08:13:02,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:13:03,304 INFO L134 CoverageAnalysis]: Checked inductivity of 13237 backedges. 0 proven. 12321 refuted. 0 times theorem prover too weak. 916 trivial. 0 not checked. [2022-01-31 08:13:03,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:13:14,031 INFO L134 CoverageAnalysis]: Checked inductivity of 13237 backedges. 4 proven. 12321 refuted. 0 times theorem prover too weak. 912 trivial. 0 not checked. [2022-01-31 08:13:14,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274172700] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:13:14,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:13:14,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 114, 114] total 228 [2022-01-31 08:13:14,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024198833] [2022-01-31 08:13:14,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:13:14,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 228 states [2022-01-31 08:13:14,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:13:14,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2022-01-31 08:13:14,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25653, Invalid=26103, Unknown=0, NotChecked=0, Total=51756 [2022-01-31 08:13:14,038 INFO L87 Difference]: Start difference. First operand 321 states and 323 transitions. Second operand has 228 states, 228 states have (on average 2.1008771929824563) internal successors, (479), 227 states have internal predecessors, (479), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 08:13:29,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:13:29,339 INFO L93 Difference]: Finished difference Result 547 states and 549 transitions. [2022-01-31 08:13:29,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2022-01-31 08:13:29,340 INFO L78 Accepts]: Start accepts. Automaton has has 228 states, 228 states have (on average 2.1008771929824563) internal successors, (479), 227 states have internal predecessors, (479), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 318 [2022-01-31 08:13:29,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:13:29,342 INFO L225 Difference]: With dead ends: 547 [2022-01-31 08:13:29,342 INFO L226 Difference]: Without dead ends: 547 [2022-01-31 08:13:29,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 531 SyntacticMatches, 0 SemanticMatches, 450 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31858 ImplicationChecksByTransitivity, 27.8s TimeCoverageRelationStatistics Valid=76502, Invalid=127350, Unknown=0, NotChecked=0, Total=203852 [2022-01-31 08:13:29,350 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 467 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 08:13:29,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 42 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 08:13:29,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-01-31 08:13:29,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 547. [2022-01-31 08:13:29,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 535 states have (on average 1.005607476635514) internal successors, (538), 536 states have internal predecessors, (538), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 08:13:29,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 549 transitions. [2022-01-31 08:13:29,358 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 549 transitions. Word has length 318 [2022-01-31 08:13:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:13:29,358 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 549 transitions. [2022-01-31 08:13:29,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 228 states, 228 states have (on average 2.1008771929824563) internal successors, (479), 227 states have internal predecessors, (479), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 08:13:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 549 transitions. [2022-01-31 08:13:29,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2022-01-31 08:13:29,361 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:13:29,361 INFO L514 BasicCegarLoop]: trace histogram [224, 224, 30, 30, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:13:29,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 08:13:29,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 08:13:29,580 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:13:29,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:13:29,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1731541388, now seen corresponding path program 5 times [2022-01-31 08:13:29,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:13:29,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479108813] [2022-01-31 08:13:29,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:13:29,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:13:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:13:43,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:13:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:13:43,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 455 [2022-01-31 08:13:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:13:44,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 524 [2022-01-31 08:13:44,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:13:44,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 532 [2022-01-31 08:13:44,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:13:44,035 INFO L134 CoverageAnalysis]: Checked inductivity of 51092 backedges. 4 proven. 50176 refuted. 0 times theorem prover too weak. 912 trivial. 0 not checked. [2022-01-31 08:13:44,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:13:44,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479108813] [2022-01-31 08:13:44,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479108813] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:13:44,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027176657] [2022-01-31 08:13:44,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:13:44,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:13:44,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:13:44,037 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:13:44,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process