/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/nla-digbench-scaling/bresenham-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 17:20:06,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 17:20:06,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 17:20:07,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 17:20:07,010 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 17:20:07,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 17:20:07,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 17:20:07,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 17:20:07,019 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 17:20:07,019 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 17:20:07,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 17:20:07,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 17:20:07,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 17:20:07,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 17:20:07,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 17:20:07,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 17:20:07,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 17:20:07,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 17:20:07,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 17:20:07,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 17:20:07,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 17:20:07,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 17:20:07,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 17:20:07,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 17:20:07,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-23 17:20:07,040 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-23 17:20:07,040 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-23 17:20:07,041 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-23 17:20:07,041 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-23 17:20:07,042 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-23 17:20:07,042 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-23 17:20:07,042 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-23 17:20:07,043 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-23 17:20:07,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-23 17:20:07,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-23 17:20:07,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-23 17:20:07,044 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-23 17:20:07,044 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-23 17:20:07,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 17:20:07,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 17:20:07,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 17:20:07,049 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 17:20:07,060 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 17:20:07,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 17:20:07,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 17:20:07,062 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 17:20:07,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 17:20:07,062 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 17:20:07,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 17:20:07,062 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 17:20:07,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 17:20:07,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 17:20:07,063 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 17:20:07,063 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 17:20:07,063 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 17:20:07,063 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 17:20:07,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 17:20:07,064 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 17:20:07,064 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 17:20:07,064 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 17:20:07,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 17:20:07,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 17:20:07,064 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 17:20:07,065 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 17:20:07,065 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 17:20:07,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 17:20:07,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 17:20:07,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 17:20:07,240 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 17:20:07,240 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 17:20:07,241 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound20.c [2022-02-23 17:20:07,292 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0939827fe/5847791b314c46f7973cbf10558f9e97/FLAG72012b061 [2022-02-23 17:20:07,677 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 17:20:07,677 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound20.c [2022-02-23 17:20:07,685 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0939827fe/5847791b314c46f7973cbf10558f9e97/FLAG72012b061 [2022-02-23 17:20:07,695 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0939827fe/5847791b314c46f7973cbf10558f9e97 [2022-02-23 17:20:07,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 17:20:07,698 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 17:20:07,700 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 17:20:07,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 17:20:07,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 17:20:07,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:20:07" (1/1) ... [2022-02-23 17:20:07,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@625dd128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:20:07, skipping insertion in model container [2022-02-23 17:20:07,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:20:07" (1/1) ... [2022-02-23 17:20:07,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 17:20:07,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 17:20:07,878 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound20.c[597,610] [2022-02-23 17:20:07,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 17:20:07,904 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 17:20:07,911 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound20.c[597,610] [2022-02-23 17:20:07,915 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 17:20:07,924 INFO L208 MainTranslator]: Completed translation [2022-02-23 17:20:07,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:20:07 WrapperNode [2022-02-23 17:20:07,925 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 17:20:07,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 17:20:07,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 17:20:07,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 17:20:07,934 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:20:07" (1/1) ... [2022-02-23 17:20:07,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:20:07" (1/1) ... [2022-02-23 17:20:07,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:20:07" (1/1) ... [2022-02-23 17:20:07,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:20:07" (1/1) ... [2022-02-23 17:20:07,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:20:07" (1/1) ... [2022-02-23 17:20:07,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:20:07" (1/1) ... [2022-02-23 17:20:07,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:20:07" (1/1) ... [2022-02-23 17:20:07,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 17:20:07,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 17:20:07,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 17:20:07,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 17:20:07,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:20:07" (1/1) ... [2022-02-23 17:20:07,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 17:20:07,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:20:07,978 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) [2022-02-23 17:20:07,987 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 [2022-02-23 17:20:08,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 17:20:08,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 17:20:08,018 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 17:20:08,018 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 17:20:08,018 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 17:20:08,018 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 17:20:08,019 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 17:20:08,019 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 17:20:08,019 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 17:20:08,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 17:20:08,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 17:20:08,020 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 17:20:08,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 17:20:08,020 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 17:20:08,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 17:20:08,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 17:20:08,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 17:20:08,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 17:20:08,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 17:20:08,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 17:20:08,061 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 17:20:08,062 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 17:20:08,222 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 17:20:08,225 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 17:20:08,226 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 17:20:08,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:20:08 BoogieIcfgContainer [2022-02-23 17:20:08,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 17:20:08,227 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 17:20:08,227 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 17:20:08,242 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 17:20:08,244 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:20:08" (1/1) ... [2022-02-23 17:20:08,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 05:20:08 BasicIcfg [2022-02-23 17:20:08,256 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 17:20:08,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 17:20:08,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 17:20:08,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 17:20:08,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 05:20:07" (1/4) ... [2022-02-23 17:20:08,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d16ddc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:20:08, skipping insertion in model container [2022-02-23 17:20:08,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:20:07" (2/4) ... [2022-02-23 17:20:08,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d16ddc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:20:08, skipping insertion in model container [2022-02-23 17:20:08,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:20:08" (3/4) ... [2022-02-23 17:20:08,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d16ddc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:20:08, skipping insertion in model container [2022-02-23 17:20:08,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 05:20:08" (4/4) ... [2022-02-23 17:20:08,280 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound20.cJordan [2022-02-23 17:20:08,283 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 17:20:08,284 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 17:20:08,322 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 17:20:08,328 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 [2022-02-23 17:20:08,328 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 17:20:08,340 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 17:20:08,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 17:20:08,355 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:20:08,356 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:20:08,356 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:20:08,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:20:08,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1563578423, now seen corresponding path program 1 times [2022-02-23 17:20:08,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:20:08,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239315627] [2022-02-23 17:20:08,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:20:08,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:20:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:20:08,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 17:20:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:20:08,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 17:20:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:20:08,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-23 17:20:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:20:08,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 17:20:08,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:20:08,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239315627] [2022-02-23 17:20:08,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239315627] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 17:20:08,547 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 17:20:08,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 17:20:08,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771383935] [2022-02-23 17:20:08,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:20:08,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 17:20:08,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:20:08,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 17:20:08,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 17:20:08,574 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 17:20:08,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:20:08,623 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-02-23 17:20:08,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 17:20:08,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-02-23 17:20:08,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:20:08,630 INFO L225 Difference]: With dead ends: 32 [2022-02-23 17:20:08,630 INFO L226 Difference]: Without dead ends: 27 [2022-02-23 17:20:08,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 17:20:08,636 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 17:20:08,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 17:20:08,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-23 17:20:08,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-02-23 17:20:08,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 17:20:08,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-02-23 17:20:08,664 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2022-02-23 17:20:08,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:20:08,665 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-02-23 17:20:08,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 17:20:08,666 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-02-23 17:20:08,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 17:20:08,668 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:20:08,668 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:20:08,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 17:20:08,668 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:20:08,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:20:08,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1863481077, now seen corresponding path program 1 times [2022-02-23 17:20:08,669 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:20:08,670 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341611289] [2022-02-23 17:20:08,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:20:08,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:20:08,702 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:20:08,702 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245086295] [2022-02-23 17:20:08,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:20:08,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:20:08,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:20:08,704 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) [2022-02-23 17:20:08,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 17:20:08,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:20:08,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 17:20:08,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:20:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 17:20:08,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 17:20:08,911 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:20:08,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341611289] [2022-02-23 17:20:08,912 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:20:08,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245086295] [2022-02-23 17:20:08,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245086295] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 17:20:08,915 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 17:20:08,915 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 17:20:08,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066378785] [2022-02-23 17:20:08,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:20:08,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 17:20:08,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:20:08,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 17:20:08,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 17:20:08,918 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 17:20:08,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:20:08,989 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-02-23 17:20:08,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 17:20:08,990 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-02-23 17:20:08,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:20:08,992 INFO L225 Difference]: With dead ends: 37 [2022-02-23 17:20:08,994 INFO L226 Difference]: Without dead ends: 35 [2022-02-23 17:20:08,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-23 17:20:09,000 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 17:20:09,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 101 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 17:20:09,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-23 17:20:09,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-02-23 17:20:09,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-23 17:20:09,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-02-23 17:20:09,010 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23 [2022-02-23 17:20:09,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:20:09,010 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-02-23 17:20:09,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 17:20:09,011 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-02-23 17:20:09,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-23 17:20:09,012 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:20:09,012 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:20:09,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 17:20:09,227 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 [2022-02-23 17:20:09,228 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:20:09,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:20:09,228 INFO L85 PathProgramCache]: Analyzing trace with hash -646008129, now seen corresponding path program 1 times [2022-02-23 17:20:09,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:20:09,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309886334] [2022-02-23 17:20:09,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:20:09,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:20:09,238 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:20:09,238 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120373783] [2022-02-23 17:20:09,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:20:09,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:20:09,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:20:09,241 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) [2022-02-23 17:20:09,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 17:20:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:20:09,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-23 17:20:09,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:20:09,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 17:20:09,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:20:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-23 17:20:09,595 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:20:09,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309886334] [2022-02-23 17:20:09,595 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:20:09,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120373783] [2022-02-23 17:20:09,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120373783] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 17:20:09,595 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 17:20:09,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-02-23 17:20:09,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495295698] [2022-02-23 17:20:09,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 17:20:09,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-23 17:20:09,596 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:20:09,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-23 17:20:09,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-23 17:20:09,597 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 17:20:09,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:20:09,802 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2022-02-23 17:20:09,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-23 17:20:09,803 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2022-02-23 17:20:09,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:20:09,804 INFO L225 Difference]: With dead ends: 46 [2022-02-23 17:20:09,804 INFO L226 Difference]: Without dead ends: 42 [2022-02-23 17:20:09,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-02-23 17:20:09,805 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 17:20:09,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 138 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 17:20:09,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-23 17:20:09,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-02-23 17:20:09,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 17:20:09,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-02-23 17:20:09,809 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2022-02-23 17:20:09,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:20:09,809 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-02-23 17:20:09,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 17:20:09,809 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-02-23 17:20:09,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-23 17:20:09,810 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:20:09,810 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:20:09,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 17:20:10,011 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 [2022-02-23 17:20:10,012 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:20:10,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:20:10,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1661983408, now seen corresponding path program 1 times [2022-02-23 17:20:10,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:20:10,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852030667] [2022-02-23 17:20:10,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:20:10,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:20:10,022 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:20:10,023 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441175669] [2022-02-23 17:20:10,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:20:10,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:20:10,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:20:10,024 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) [2022-02-23 17:20:10,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 17:20:10,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:20:10,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-23 17:20:10,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:20:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-23 17:20:10,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:20:10,734 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-23 17:20:10,734 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:20:10,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852030667] [2022-02-23 17:20:10,734 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:20:10,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441175669] [2022-02-23 17:20:10,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441175669] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 17:20:10,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 17:20:10,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-02-23 17:20:10,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865624468] [2022-02-23 17:20:10,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 17:20:10,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-23 17:20:10,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:20:10,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-23 17:20:10,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-02-23 17:20:10,736 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-02-23 17:20:11,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:20:11,219 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2022-02-23 17:20:11,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-23 17:20:11,219 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 39 [2022-02-23 17:20:11,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:20:11,220 INFO L225 Difference]: With dead ends: 59 [2022-02-23 17:20:11,220 INFO L226 Difference]: Without dead ends: 53 [2022-02-23 17:20:11,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2022-02-23 17:20:11,221 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 25 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 17:20:11,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 248 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 188 Invalid, 0 Unknown, 69 Unchecked, 0.2s Time] [2022-02-23 17:20:11,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-23 17:20:11,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2022-02-23 17:20:11,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 17:20:11,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-02-23 17:20:11,226 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 39 [2022-02-23 17:20:11,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:20:11,226 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-02-23 17:20:11,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-02-23 17:20:11,226 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-02-23 17:20:11,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-23 17:20:11,227 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:20:11,227 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:20:11,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 17:20:11,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:20:11,428 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:20:11,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:20:11,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1381917339, now seen corresponding path program 1 times [2022-02-23 17:20:11,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:20:11,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383129548] [2022-02-23 17:20:11,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:20:11,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:20:11,440 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:20:11,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498564074] [2022-02-23 17:20:11,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:20:11,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:20:11,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:20:11,441 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) [2022-02-23 17:20:11,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 17:20:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:20:11,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-23 17:20:11,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:20:11,570 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 17:20:11,573 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 17:20:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-02-23 17:20:15,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:20:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-02-23 17:20:15,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:20:15,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383129548] [2022-02-23 17:20:15,909 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:20:15,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498564074] [2022-02-23 17:20:15,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498564074] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 17:20:15,910 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 17:20:15,910 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-02-23 17:20:15,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420783882] [2022-02-23 17:20:15,910 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 17:20:15,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 17:20:15,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:20:15,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 17:20:15,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=146, Unknown=1, NotChecked=0, Total=182 [2022-02-23 17:20:15,911 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 14 states, 10 states have (on average 2.9) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-02-23 17:20:17,928 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 17:20:22,158 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 17:20:24,164 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 17:20:26,176 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 17:20:28,235 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 17:20:30,246 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 17:20:32,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:20:32,564 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2022-02-23 17:20:32,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 17:20:32,564 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.9) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 48 [2022-02-23 17:20:32,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:20:32,565 INFO L225 Difference]: With dead ends: 59 [2022-02-23 17:20:32,565 INFO L226 Difference]: Without dead ends: 55 [2022-02-23 17:20:32,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=66, Invalid=237, Unknown=3, NotChecked=0, Total=306 [2022-02-23 17:20:32,566 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 15 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2022-02-23 17:20:32,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 186 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 140 Invalid, 6 Unknown, 0 Unchecked, 12.3s Time] [2022-02-23 17:20:32,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-23 17:20:32,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2022-02-23 17:20:32,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 17:20:32,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-02-23 17:20:32,570 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 48 [2022-02-23 17:20:32,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:20:32,570 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-02-23 17:20:32,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.9) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-02-23 17:20:32,571 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-02-23 17:20:32,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-23 17:20:32,572 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:20:32,572 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:20:32,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 17:20:32,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:20:32,772 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:20:32,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:20:32,773 INFO L85 PathProgramCache]: Analyzing trace with hash -545218702, now seen corresponding path program 1 times [2022-02-23 17:20:32,773 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:20:32,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802803909] [2022-02-23 17:20:32,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:20:32,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:20:32,781 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:20:32,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526644935] [2022-02-23 17:20:32,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:20:32,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:20:32,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:20:32,804 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) [2022-02-23 17:20:32,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 17:20:32,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:20:32,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 17:20:32,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:20:33,069 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-23 17:20:33,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:20:33,252 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-23 17:20:33,252 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:20:33,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802803909] [2022-02-23 17:20:33,252 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:20:33,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526644935] [2022-02-23 17:20:33,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526644935] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 17:20:33,252 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 17:20:33,252 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-02-23 17:20:33,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340474061] [2022-02-23 17:20:33,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 17:20:33,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 17:20:33,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:20:33,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 17:20:33,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-02-23 17:20:33,254 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-02-23 17:20:33,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:20:33,414 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2022-02-23 17:20:33,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 17:20:33,414 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 57 [2022-02-23 17:20:33,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:20:33,415 INFO L225 Difference]: With dead ends: 72 [2022-02-23 17:20:33,415 INFO L226 Difference]: Without dead ends: 72 [2022-02-23 17:20:33,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-02-23 17:20:33,416 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 17:20:33,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 241 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 17:20:33,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-23 17:20:33,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2022-02-23 17:20:33,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 17:20:33,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-02-23 17:20:33,422 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 57 [2022-02-23 17:20:33,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:20:33,422 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-02-23 17:20:33,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-02-23 17:20:33,422 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-02-23 17:20:33,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-23 17:20:33,423 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:20:33,423 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:20:33,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 17:20:33,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:20:33,640 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:20:33,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:20:33,640 INFO L85 PathProgramCache]: Analyzing trace with hash 494880272, now seen corresponding path program 2 times [2022-02-23 17:20:33,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:20:33,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194274224] [2022-02-23 17:20:33,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:20:33,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:20:33,648 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:20:33,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90329442] [2022-02-23 17:20:33,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 17:20:33,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:20:33,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:20:33,649 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) [2022-02-23 17:20:33,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 17:20:33,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 17:20:33,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 17:20:33,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 17:20:33,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:20:33,765 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-02-23 17:20:33,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:20:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-23 17:20:33,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:20:33,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194274224] [2022-02-23 17:20:33,888 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:20:33,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90329442] [2022-02-23 17:20:33,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90329442] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 17:20:33,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 17:20:33,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-02-23 17:20:33,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283430436] [2022-02-23 17:20:33,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 17:20:33,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 17:20:33,889 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:20:33,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 17:20:33,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-23 17:20:33,890 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-02-23 17:20:33,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:20:33,942 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2022-02-23 17:20:33,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 17:20:33,942 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 57 [2022-02-23 17:20:33,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:20:33,943 INFO L225 Difference]: With dead ends: 77 [2022-02-23 17:20:33,943 INFO L226 Difference]: Without dead ends: 77 [2022-02-23 17:20:33,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-02-23 17:20:33,944 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 17:20:33,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 134 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 17:20:33,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-23 17:20:33,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-02-23 17:20:33,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 55 states have internal predecessors, (64), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 17:20:33,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2022-02-23 17:20:33,948 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 57 [2022-02-23 17:20:33,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:20:33,949 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2022-02-23 17:20:33,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-02-23 17:20:33,949 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2022-02-23 17:20:33,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-23 17:20:33,950 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:20:33,950 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:20:33,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 17:20:34,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:20:34,169 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:20:34,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:20:34,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1739644753, now seen corresponding path program 3 times [2022-02-23 17:20:34,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:20:34,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513470354] [2022-02-23 17:20:34,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:20:34,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:20:34,177 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:20:34,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572722793] [2022-02-23 17:20:34,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 17:20:34,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:20:34,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:20:34,186 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) [2022-02-23 17:20:34,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 17:20:34,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-23 17:20:34,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 17:20:34,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-23 17:20:34,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:20:35,608 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 17:20:35,611 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 17:20:35,612 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 17:20:43,022 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-02-23 17:20:43,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:20:43,779 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 17:20:45,032 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 17:21:06,582 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-02-23 17:21:06,583 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:21:06,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513470354] [2022-02-23 17:21:06,583 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:21:06,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572722793] [2022-02-23 17:21:06,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572722793] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 17:21:06,583 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 17:21:06,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 25 [2022-02-23 17:21:06,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17640259] [2022-02-23 17:21:06,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 17:21:06,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-23 17:21:06,584 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:21:06,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-23 17:21:06,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=498, Unknown=5, NotChecked=0, Total=600 [2022-02-23 17:21:06,585 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand has 25 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 22 states have internal predecessors, (44), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-02-23 17:21:19,909 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 17:21:29,640 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 17:21:32,074 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 17:21:40,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:21:40,014 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2022-02-23 17:21:40,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-23 17:21:40,014 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 22 states have internal predecessors, (44), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 57 [2022-02-23 17:21:40,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:21:40,014 INFO L225 Difference]: With dead ends: 78 [2022-02-23 17:21:40,014 INFO L226 Difference]: Without dead ends: 0 [2022-02-23 17:21:40,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 45.7s TimeCoverageRelationStatistics Valid=236, Invalid=1089, Unknown=7, NotChecked=0, Total=1332 [2022-02-23 17:21:40,015 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 42 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 19 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-02-23 17:21:40,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 151 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 178 Invalid, 2 Unknown, 47 Unchecked, 7.1s Time] [2022-02-23 17:21:40,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-23 17:21:40,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-23 17:21:40,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-23 17:21:40,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-23 17:21:40,016 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2022-02-23 17:21:40,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:21:40,016 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-23 17:21:40,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 22 states have internal predecessors, (44), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-02-23 17:21:40,017 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-23 17:21:40,017 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-23 17:21:40,018 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 17:21:40,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-23 17:21:40,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:21:40,226 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2022-02-23 17:21:40,227 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 17:21:40,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:21:40 BasicIcfg [2022-02-23 17:21:40,230 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 17:21:40,231 INFO L158 Benchmark]: Toolchain (without parser) took 92532.96ms. Allocated memory was 187.7MB in the beginning and 286.3MB in the end (delta: 98.6MB). Free memory was 134.0MB in the beginning and 200.3MB in the end (delta: -66.3MB). Peak memory consumption was 33.6MB. Max. memory is 8.0GB. [2022-02-23 17:21:40,231 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 187.7MB. Free memory is still 150.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 17:21:40,231 INFO L158 Benchmark]: CACSL2BoogieTranslator took 224.36ms. Allocated memory was 187.7MB in the beginning and 286.3MB in the end (delta: 98.6MB). Free memory was 133.7MB in the beginning and 256.6MB in the end (delta: -122.8MB). Peak memory consumption was 10.0MB. Max. memory is 8.0GB. [2022-02-23 17:21:40,232 INFO L158 Benchmark]: Boogie Preprocessor took 30.14ms. Allocated memory is still 286.3MB. Free memory was 256.6MB in the beginning and 255.1MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 17:21:40,232 INFO L158 Benchmark]: RCFGBuilder took 269.87ms. Allocated memory is still 286.3MB. Free memory was 255.1MB in the beginning and 244.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-23 17:21:40,232 INFO L158 Benchmark]: IcfgTransformer took 29.38ms. Allocated memory is still 286.3MB. Free memory was 244.6MB in the beginning and 243.3MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 17:21:40,233 INFO L158 Benchmark]: TraceAbstraction took 91955.05ms. Allocated memory is still 286.3MB. Free memory was 242.9MB in the beginning and 200.3MB in the end (delta: 42.6MB). Peak memory consumption was 43.5MB. Max. memory is 8.0GB. [2022-02-23 17:21:40,234 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 187.7MB. Free memory is still 150.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 224.36ms. Allocated memory was 187.7MB in the beginning and 286.3MB in the end (delta: 98.6MB). Free memory was 133.7MB in the beginning and 256.6MB in the end (delta: -122.8MB). Peak memory consumption was 10.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.14ms. Allocated memory is still 286.3MB. Free memory was 256.6MB in the beginning and 255.1MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 269.87ms. Allocated memory is still 286.3MB. Free memory was 255.1MB in the beginning and 244.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 29.38ms. Allocated memory is still 286.3MB. Free memory was 244.6MB in the beginning and 243.3MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 91955.05ms. Allocated memory is still 286.3MB. Free memory was 242.9MB in the beginning and 200.3MB in the end (delta: 42.6MB). Peak memory consumption was 43.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 91.9s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 51.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 8 mSolverCounterUnknown, 151 SdHoareTripleChecker+Valid, 20.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 144 mSDsluCounter, 1233 SdHoareTripleChecker+Invalid, 19.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 116 IncrementalHoareTripleChecker+Unchecked, 1035 mSDsCounter, 82 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 939 IncrementalHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 82 mSolverCounterUnsat, 198 mSDtfsCounter, 939 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 647 GetRequests, 514 SyntacticMatches, 8 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 53.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=7, InterpolantAutomatonStates: 101, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 31 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 38.4s InterpolantComputationTime, 336 NumberOfCodeBlocks, 318 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 612 ConstructedInterpolants, 6 QuantifiedInterpolants, 3263 SizeOfPredicates, 49 NumberOfNonLiveVariables, 873 ConjunctsInSsa, 125 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 389/480 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-02-23 17:21:40,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...