/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/hard-u_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 06:12:11,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 06:12:11,320 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 06:12:11,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 06:12:11,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 06:12:11,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 06:12:11,375 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 06:12:11,379 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 06:12:11,381 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 06:12:11,386 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 06:12:11,387 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 06:12:11,388 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 06:12:11,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 06:12:11,392 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 06:12:11,393 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 06:12:11,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 06:12:11,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 06:12:11,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 06:12:11,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 06:12:11,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 06:12:11,411 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 06:12:11,412 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 06:12:11,413 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 06:12:11,413 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 06:12:11,415 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 06:12:11,421 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 06:12:11,424 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 06:12:11,426 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 06:12:11,426 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 06:12:11,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 06:12:11,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 06:12:11,428 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 06:12:11,428 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 06:12:11,428 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 06:12:11,429 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 06:12:11,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 06:12:11,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 06:12:11,431 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 06:12:11,446 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 06:12:11,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 06:12:11,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 06:12:11,448 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 06:12:11,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 06:12:11,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 06:12:11,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 06:12:11,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 06:12:11,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 06:12:11,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 06:12:11,450 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 06:12:11,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 06:12:11,450 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 06:12:11,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 06:12:11,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 06:12:11,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 06:12:11,451 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 06:12:11,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 06:12:11,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 06:12:11,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 06:12:11,451 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 06:12:11,452 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 06:12:11,452 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 06:12:11,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 06:12:11,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 06:12:11,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 06:12:11,711 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 06:12:11,714 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 06:12:11,715 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound100.c [2022-03-20 06:12:11,762 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/976f3ed7e/0bc6dafa23134d29ad73734dae2b1bcb/FLAG48acce345 [2022-03-20 06:12:12,135 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 06:12:12,135 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound100.c [2022-03-20 06:12:12,147 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/976f3ed7e/0bc6dafa23134d29ad73734dae2b1bcb/FLAG48acce345 [2022-03-20 06:12:12,558 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/976f3ed7e/0bc6dafa23134d29ad73734dae2b1bcb [2022-03-20 06:12:12,560 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 06:12:12,562 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 06:12:12,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 06:12:12,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 06:12:12,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 06:12:12,569 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:12:12" (1/1) ... [2022-03-20 06:12:12,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d1f9190 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:12:12, skipping insertion in model container [2022-03-20 06:12:12,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:12:12" (1/1) ... [2022-03-20 06:12:12,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 06:12:12,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 06:12:12,777 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/hard-u_valuebound100.c[537,550] [2022-03-20 06:12:12,808 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 06:12:12,816 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 06:12:12,828 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/hard-u_valuebound100.c[537,550] [2022-03-20 06:12:12,845 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 06:12:12,857 INFO L208 MainTranslator]: Completed translation [2022-03-20 06:12:12,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:12:12 WrapperNode [2022-03-20 06:12:12,858 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 06:12:12,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 06:12:12,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 06:12:12,860 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 06:12:12,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:12:12" (1/1) ... [2022-03-20 06:12:12,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:12:12" (1/1) ... [2022-03-20 06:12:12,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:12:12" (1/1) ... [2022-03-20 06:12:12,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:12:12" (1/1) ... [2022-03-20 06:12:12,892 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:12:12" (1/1) ... [2022-03-20 06:12:12,896 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:12:12" (1/1) ... [2022-03-20 06:12:12,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:12:12" (1/1) ... [2022-03-20 06:12:12,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 06:12:12,904 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 06:12:12,904 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 06:12:12,904 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 06:12:12,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:12:12" (1/1) ... [2022-03-20 06:12:12,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 06:12:12,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:12:12,941 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) [2022-03-20 06:12:12,962 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 [2022-03-20 06:12:12,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 06:12:12,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 06:12:12,977 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 06:12:12,978 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 06:12:12,978 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 06:12:12,978 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 06:12:12,978 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 06:12:12,978 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 06:12:12,978 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 06:12:12,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 06:12:12,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 06:12:12,979 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 06:12:12,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 06:12:12,979 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 06:12:12,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 06:12:12,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 06:12:12,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 06:12:12,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 06:12:12,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 06:12:12,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 06:12:13,031 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 06:12:13,033 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 06:12:13,229 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 06:12:13,234 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 06:12:13,234 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 06:12:13,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:12:13 BoogieIcfgContainer [2022-03-20 06:12:13,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 06:12:13,236 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 06:12:13,236 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 06:12:13,252 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 06:12:13,255 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:12:13" (1/1) ... [2022-03-20 06:12:13,256 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 06:12:13,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 06:12:13 BasicIcfg [2022-03-20 06:12:13,280 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 06:12:13,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 06:12:13,281 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 06:12:13,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 06:12:13,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 06:12:12" (1/4) ... [2022-03-20 06:12:13,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b9ab100 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:12:13, skipping insertion in model container [2022-03-20 06:12:13,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:12:12" (2/4) ... [2022-03-20 06:12:13,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b9ab100 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:12:13, skipping insertion in model container [2022-03-20 06:12:13,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:12:13" (3/4) ... [2022-03-20 06:12:13,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b9ab100 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 06:12:13, skipping insertion in model container [2022-03-20 06:12:13,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 06:12:13" (4/4) ... [2022-03-20 06:12:13,308 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound100.cJordan [2022-03-20 06:12:13,312 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 06:12:13,313 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 06:12:13,369 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 06:12:13,375 INFO L340 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 [2022-03-20 06:12:13,377 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 06:12:13,389 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 06:12:13,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 06:12:13,402 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:12:13,402 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:12:13,403 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:12:13,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:12:13,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2022-03-20 06:12:13,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:12:13,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878811994] [2022-03-20 06:12:13,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:12:13,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:12:13,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:12:13,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 06:12:13,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:12:13,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 06:12:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:12:13,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 06:12:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:12:13,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 06:12:13,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:12:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 06:12:13,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:12:13,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878811994] [2022-03-20 06:12:13,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878811994] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:12:13,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:12:13,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 06:12:13,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452450123] [2022-03-20 06:12:13,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:12:13,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 06:12:13,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:12:13,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 06:12:13,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 06:12:13,669 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 06:12:13,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:12:13,751 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-03-20 06:12:13,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 06:12:13,756 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-20 06:12:13,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:12:13,763 INFO L225 Difference]: With dead ends: 38 [2022-03-20 06:12:13,764 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 06:12:13,765 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 06:12:13,769 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:12:13,770 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:12:13,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 06:12:13,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-20 06:12:13,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 06:12:13,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-03-20 06:12:13,807 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-03-20 06:12:13,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:12:13,808 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-03-20 06:12:13,809 INFO L479 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 06:12:13,809 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-03-20 06:12:13,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 06:12:13,811 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:12:13,811 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:12:13,812 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 06:12:13,812 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:12:13,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:12:13,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2022-03-20 06:12:13,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:12:13,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107799949] [2022-03-20 06:12:13,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:12:13,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:12:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:12:13,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 06:12:13,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:12:13,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 06:12:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:12:13,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 06:12:13,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:12:13,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 06:12:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:12:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 06:12:13,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:12:13,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107799949] [2022-03-20 06:12:13,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107799949] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:12:13,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:12:13,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 06:12:13,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691755953] [2022-03-20 06:12:13,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:12:13,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 06:12:13,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:12:13,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 06:12:13,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:12:13,998 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 06:12:14,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:12:14,200 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-03-20 06:12:14,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 06:12:14,201 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-20 06:12:14,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:12:14,204 INFO L225 Difference]: With dead ends: 44 [2022-03-20 06:12:14,207 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 06:12:14,212 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 06:12:14,213 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:12:14,214 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:12:14,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 06:12:14,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-20 06:12:14,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 06:12:14,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-20 06:12:14,230 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-03-20 06:12:14,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:12:14,231 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-20 06:12:14,231 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 06:12:14,231 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-20 06:12:14,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 06:12:14,232 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:12:14,232 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:12:14,232 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 06:12:14,232 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:12:14,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:12:14,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2022-03-20 06:12:14,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:12:14,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618320694] [2022-03-20 06:12:14,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:12:14,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:12:14,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:12:14,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 06:12:14,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:12:14,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 06:12:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:12:14,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 06:12:14,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:12:14,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 06:12:14,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:12:14,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 06:12:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:12:14,456 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 06:12:14,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:12:14,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618320694] [2022-03-20 06:12:14,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618320694] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:12:14,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:12:14,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 06:12:14,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309838269] [2022-03-20 06:12:14,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:12:14,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 06:12:14,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:12:14,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 06:12:14,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:12:14,459 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 06:12:14,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:12:14,662 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-03-20 06:12:14,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 06:12:14,662 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 06:12:14,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:12:14,664 INFO L225 Difference]: With dead ends: 48 [2022-03-20 06:12:14,664 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 06:12:14,666 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 06:12:14,670 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 06:12:14,672 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 06:12:14,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 06:12:14,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-03-20 06:12:14,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 06:12:14,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-03-20 06:12:14,691 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-03-20 06:12:14,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:12:14,691 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-03-20 06:12:14,692 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 06:12:14,692 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-03-20 06:12:14,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 06:12:14,693 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:12:14,693 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:12:14,693 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 06:12:14,693 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:12:14,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:12:14,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2022-03-20 06:12:14,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:12:14,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925131690] [2022-03-20 06:12:14,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:12:14,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:12:14,708 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:12:14,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1162767837] [2022-03-20 06:12:14,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:12:14,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:12:14,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:12:14,711 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) [2022-03-20 06:12:14,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 06:12:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:12:14,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 06:12:14,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:12:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 06:12:14,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 06:12:14,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:12:14,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925131690] [2022-03-20 06:12:14,970 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:12:14,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162767837] [2022-03-20 06:12:14,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162767837] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:12:14,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:12:14,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 06:12:14,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415282694] [2022-03-20 06:12:14,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:12:14,972 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:12:14,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:12:14,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:12:14,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:12:14,973 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 06:12:17,013 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 06:12:17,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:12:17,220 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2022-03-20 06:12:17,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:12:17,221 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-03-20 06:12:17,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:12:17,222 INFO L225 Difference]: With dead ends: 56 [2022-03-20 06:12:17,222 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 06:12:17,222 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:12:17,223 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 06:12:17,223 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 154 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 06:12:17,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 06:12:17,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-20 06:12:17,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 06:12:17,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2022-03-20 06:12:17,229 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 38 [2022-03-20 06:12:17,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:12:17,230 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2022-03-20 06:12:17,230 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 06:12:17,230 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2022-03-20 06:12:17,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 06:12:17,231 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:12:17,231 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:12:17,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 06:12:17,455 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:12:17,456 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:12:17,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:12:17,457 INFO L85 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2022-03-20 06:12:17,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:12:17,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530301326] [2022-03-20 06:12:17,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:12:17,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:12:17,469 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:12:17,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1198521979] [2022-03-20 06:12:17,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:12:17,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:12:17,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:12:17,473 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) [2022-03-20 06:12:17,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 06:12:17,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:12:17,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 06:12:17,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:12:17,901 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 06:12:17,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:12:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 06:12:18,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:12:18,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530301326] [2022-03-20 06:12:18,169 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:12:18,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198521979] [2022-03-20 06:12:18,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198521979] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 06:12:18,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 06:12:18,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-20 06:12:18,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041432024] [2022-03-20 06:12:18,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:12:18,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 06:12:18,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:12:18,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 06:12:18,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-20 06:12:18,172 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 06:12:20,261 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 [] [2022-03-20 06:12:20,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:12:20,382 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2022-03-20 06:12:20,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:12:20,382 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-03-20 06:12:20,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:12:20,383 INFO L225 Difference]: With dead ends: 66 [2022-03-20 06:12:20,383 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 06:12:20,384 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-20 06:12:20,384 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 06:12:20,385 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 178 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 06:12:20,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 06:12:20,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-20 06:12:20,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 38 states have internal predecessors, (44), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 06:12:20,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2022-03-20 06:12:20,392 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 45 [2022-03-20 06:12:20,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:12:20,392 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2022-03-20 06:12:20,392 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 06:12:20,392 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2022-03-20 06:12:20,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 06:12:20,394 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:12:20,394 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 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, 1] [2022-03-20 06:12:20,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 06:12:20,616 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:12:20,617 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:12:20,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:12:20,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2022-03-20 06:12:20,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:12:20,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741060064] [2022-03-20 06:12:20,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:12:20,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:12:20,632 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:12:20,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408236296] [2022-03-20 06:12:20,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:12:20,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:12:20,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:12:20,634 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) [2022-03-20 06:12:20,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 06:12:20,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:12:20,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 06:12:20,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:12:21,192 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-20 06:12:21,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:12:21,459 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 06:12:21,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:12:21,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741060064] [2022-03-20 06:12:21,460 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:12:21,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408236296] [2022-03-20 06:12:21,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408236296] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 06:12:21,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 06:12:21,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2022-03-20 06:12:21,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903790483] [2022-03-20 06:12:21,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:12:21,461 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 06:12:21,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:12:21,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 06:12:21,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-20 06:12:21,462 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 06:12:23,506 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 [] [2022-03-20 06:12:25,086 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 06:12:27,138 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 06:12:29,280 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 06:12:29,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:12:29,452 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2022-03-20 06:12:29,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:12:29,454 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2022-03-20 06:12:29,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:12:29,455 INFO L225 Difference]: With dead ends: 74 [2022-03-20 06:12:29,455 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 06:12:29,455 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-03-20 06:12:29,456 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 11 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:12:29,456 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 144 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 3 Unknown, 0 Unchecked, 8.0s Time] [2022-03-20 06:12:29,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 06:12:29,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2022-03-20 06:12:29,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.2) internal successors, (48), 43 states have internal predecessors, (48), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 06:12:29,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 89 transitions. [2022-03-20 06:12:29,463 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 89 transitions. Word has length 55 [2022-03-20 06:12:29,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:12:29,464 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 89 transitions. [2022-03-20 06:12:29,464 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 06:12:29,464 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 89 transitions. [2022-03-20 06:12:29,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 06:12:29,465 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:12:29,465 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:12:29,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-20 06:12:29,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:12:29,671 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:12:29,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:12:29,672 INFO L85 PathProgramCache]: Analyzing trace with hash 810354846, now seen corresponding path program 1 times [2022-03-20 06:12:29,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:12:29,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280721941] [2022-03-20 06:12:29,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:12:29,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:12:29,685 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:12:29,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437900625] [2022-03-20 06:12:29,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:12:29,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:12:29,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:12:29,687 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) [2022-03-20 06:12:29,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 06:12:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:12:29,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 06:12:29,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:12:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-20 06:12:30,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:12:30,339 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 06:12:30,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:12:30,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280721941] [2022-03-20 06:12:30,339 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:12:30,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437900625] [2022-03-20 06:12:30,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437900625] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 06:12:30,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 06:12:30,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-20 06:12:30,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365445323] [2022-03-20 06:12:30,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:12:30,341 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 06:12:30,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:12:30,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 06:12:30,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-20 06:12:30,341 INFO L87 Difference]: Start difference. First operand 71 states and 89 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 06:12:31,857 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 06:12:33,892 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 06:12:36,044 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 06:12:36,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:12:36,161 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2022-03-20 06:12:36,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:12:36,162 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2022-03-20 06:12:36,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:12:36,164 INFO L225 Difference]: With dead ends: 75 [2022-03-20 06:12:36,164 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 06:12:36,165 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-20 06:12:36,165 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-03-20 06:12:36,166 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 199 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 2 Unknown, 0 Unchecked, 5.8s Time] [2022-03-20 06:12:36,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 06:12:36,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-20 06:12:36,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 40 states have (on average 1.175) internal successors, (47), 42 states have internal predecessors, (47), 21 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 06:12:36,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2022-03-20 06:12:36,172 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 56 [2022-03-20 06:12:36,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:12:36,173 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2022-03-20 06:12:36,173 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 06:12:36,173 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2022-03-20 06:12:36,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 06:12:36,174 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:12:36,174 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:12:36,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 06:12:36,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:12:36,387 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:12:36,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:12:36,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1535015126, now seen corresponding path program 1 times [2022-03-20 06:12:36,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:12:36,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564653810] [2022-03-20 06:12:36,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:12:36,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:12:36,398 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:12:36,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [825212695] [2022-03-20 06:12:36,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:12:36,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:12:36,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:12:36,409 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) [2022-03-20 06:12:36,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process