/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-programs/partial_mod_count_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 09:19:02,169 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 09:19:02,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 09:19:02,219 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 09:19:02,219 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 09:19:02,227 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 09:19:02,230 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 09:19:02,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 09:19:02,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 09:19:02,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 09:19:02,242 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 09:19:02,243 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 09:19:02,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 09:19:02,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 09:19:02,247 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 09:19:02,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 09:19:02,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 09:19:02,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 09:19:02,252 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 09:19:02,257 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 09:19:02,258 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 09:19:02,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 09:19:02,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 09:19:02,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 09:19:02,268 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 09:19:02,274 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 09:19:02,275 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 09:19:02,275 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 09:19:02,276 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 09:19:02,288 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 09:19:02,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 09:19:02,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 09:19:02,289 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 09:19:02,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 09:19:02,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 09:19:02,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 09:19:02,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 09:19:02,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 09:19:02,290 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 09:19:02,291 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 09:19:02,291 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 09:19:02,291 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 09:19:02,291 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 09:19:02,291 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 09:19:02,291 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 09:19:02,292 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 09:19:02,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 09:19:02,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:19:02,292 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 09:19:02,292 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 09:19:02,293 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 09:19:02,293 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 09:19:02,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 09:19:02,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 09:19:02,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 09:19:02,541 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 09:19:02,542 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 09:19:02,543 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/partial_mod_count_3.c [2022-01-31 09:19:02,598 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4629c3f15/6775a77b9e2a4ba2916a67ca15e669d4/FLAG4cf595bb6 [2022-01-31 09:19:02,955 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 09:19:02,955 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_3.c [2022-01-31 09:19:02,961 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4629c3f15/6775a77b9e2a4ba2916a67ca15e669d4/FLAG4cf595bb6 [2022-01-31 09:19:02,973 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4629c3f15/6775a77b9e2a4ba2916a67ca15e669d4 [2022-01-31 09:19:02,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 09:19:02,978 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 09:19:02,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 09:19:02,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 09:19:02,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 09:19:02,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:19:02" (1/1) ... [2022-01-31 09:19:02,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78282a4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:19:02, skipping insertion in model container [2022-01-31 09:19:02,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:19:02" (1/1) ... [2022-01-31 09:19:02,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 09:19:03,002 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 09:19:03,160 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_3.c[323,336] [2022-01-31 09:19:03,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:19:03,192 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 09:19:03,205 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_3.c[323,336] [2022-01-31 09:19:03,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:19:03,230 INFO L208 MainTranslator]: Completed translation [2022-01-31 09:19:03,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:19:03 WrapperNode [2022-01-31 09:19:03,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 09:19:03,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 09:19:03,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 09:19:03,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 09:19:03,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:19:03" (1/1) ... [2022-01-31 09:19:03,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:19:03" (1/1) ... [2022-01-31 09:19:03,248 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:19:03" (1/1) ... [2022-01-31 09:19:03,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:19:03" (1/1) ... [2022-01-31 09:19:03,264 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:19:03" (1/1) ... [2022-01-31 09:19:03,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:19:03" (1/1) ... [2022-01-31 09:19:03,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:19:03" (1/1) ... [2022-01-31 09:19:03,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 09:19:03,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 09:19:03,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 09:19:03,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 09:19:03,280 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:19:03" (1/1) ... [2022-01-31 09:19:03,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:19:03,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:19:03,308 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 09:19:03,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 09:19:03,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 09:19:03,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 09:19:03,354 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 09:19:03,354 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 09:19:03,354 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 09:19:03,354 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 09:19:03,355 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 09:19:03,355 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 09:19:03,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 09:19:03,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 09:19:03,355 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 09:19:03,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 09:19:03,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 09:19:03,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 09:19:03,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 09:19:03,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 09:19:03,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 09:19:03,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 09:19:03,416 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 09:19:03,417 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 09:19:03,506 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 09:19:03,511 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 09:19:03,511 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 09:19:03,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:19:03 BoogieIcfgContainer [2022-01-31 09:19:03,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 09:19:03,513 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 09:19:03,513 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 09:19:03,514 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 09:19:03,516 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:19:03" (1/1) ... [2022-01-31 09:19:03,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:19:03 BasicIcfg [2022-01-31 09:19:03,531 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 09:19:03,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 09:19:03,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 09:19:03,535 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 09:19:03,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:19:02" (1/4) ... [2022-01-31 09:19:03,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17dc50d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:19:03, skipping insertion in model container [2022-01-31 09:19:03,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:19:03" (2/4) ... [2022-01-31 09:19:03,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17dc50d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:19:03, skipping insertion in model container [2022-01-31 09:19:03,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:19:03" (3/4) ... [2022-01-31 09:19:03,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17dc50d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 09:19:03, skipping insertion in model container [2022-01-31 09:19:03,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:19:03" (4/4) ... [2022-01-31 09:19:03,537 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_3.cJordan [2022-01-31 09:19:03,541 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 09:19:03,542 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 09:19:03,577 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 09:19:03,585 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 09:19:03,585 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 09:19:03,598 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:19:03,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 09:19:03,614 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:19:03,614 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:19:03,615 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:19:03,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:19:03,622 INFO L85 PathProgramCache]: Analyzing trace with hash 2081050055, now seen corresponding path program 1 times [2022-01-31 09:19:03,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:19:03,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768087466] [2022-01-31 09:19:03,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:19:03,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:19:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:19:03,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:19:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:19:03,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:19:03,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:19:03,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768087466] [2022-01-31 09:19:03,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768087466] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:19:03,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:19:03,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 09:19:03,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81374611] [2022-01-31 09:19:03,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:19:03,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 09:19:03,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:19:03,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 09:19:03,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 09:19:03,884 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:19:03,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:19:03,964 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-01-31 09:19:03,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 09:19:03,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 09:19:03,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:19:03,978 INFO L225 Difference]: With dead ends: 25 [2022-01-31 09:19:03,979 INFO L226 Difference]: Without dead ends: 20 [2022-01-31 09:19:03,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 09:19:03,983 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:19:03,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 23 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:19:03,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-31 09:19:04,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-31 09:19:04,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:19:04,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-01-31 09:19:04,010 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2022-01-31 09:19:04,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:19:04,011 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-01-31 09:19:04,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:19:04,011 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-01-31 09:19:04,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 09:19:04,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:19:04,012 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:19:04,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 09:19:04,013 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:19:04,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:19:04,015 INFO L85 PathProgramCache]: Analyzing trace with hash -471106906, now seen corresponding path program 1 times [2022-01-31 09:19:04,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:19:04,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380384510] [2022-01-31 09:19:04,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:19:04,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:19:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:19:04,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:19:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:19:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:19:04,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:19:04,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380384510] [2022-01-31 09:19:04,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380384510] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:19:04,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:19:04,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:19:04,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386808992] [2022-01-31 09:19:04,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:19:04,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 09:19:04,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:19:04,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 09:19:04,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 09:19:04,149 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:19:04,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:19:04,269 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-01-31 09:19:04,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 09:19:04,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 09:19:04,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:19:04,272 INFO L225 Difference]: With dead ends: 27 [2022-01-31 09:19:04,272 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 09:19:04,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 09:19:04,274 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 41 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:19:04,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 18 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:19:04,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 09:19:04,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-01-31 09:19:04,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:19:04,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-01-31 09:19:04,280 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2022-01-31 09:19:04,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:19:04,281 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-01-31 09:19:04,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:19:04,281 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-01-31 09:19:04,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 09:19:04,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:19:04,282 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:19:04,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 09:19:04,282 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:19:04,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:19:04,287 INFO L85 PathProgramCache]: Analyzing trace with hash -150654790, now seen corresponding path program 1 times [2022-01-31 09:19:04,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:19:04,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214048464] [2022-01-31 09:19:04,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:19:04,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:19:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:19:04,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:19:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:19:04,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:19:04,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:19:04,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214048464] [2022-01-31 09:19:04,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214048464] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:19:04,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980401054] [2022-01-31 09:19:04,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:19:04,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:19:04,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:19:04,423 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:19:04,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 09:19:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:19:04,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 09:19:04,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:19:04,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:19:04,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:19:04,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:19:04,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980401054] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:19:04,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:19:04,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-01-31 09:19:04,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433100022] [2022-01-31 09:19:04,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:19:04,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 09:19:04,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:19:04,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 09:19:04,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-01-31 09:19:04,631 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:19:04,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:19:04,805 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-01-31 09:19:04,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 09:19:04,806 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-01-31 09:19:04,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:19:04,807 INFO L225 Difference]: With dead ends: 43 [2022-01-31 09:19:04,807 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 09:19:04,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-01-31 09:19:04,809 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 73 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:19:04,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 27 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:19:04,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 09:19:04,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2022-01-31 09:19:04,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:19:04,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-01-31 09:19:04,814 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 17 [2022-01-31 09:19:04,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:19:04,815 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-01-31 09:19:04,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:19:04,815 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-01-31 09:19:04,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 09:19:04,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:19:04,816 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:19:04,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 09:19:05,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:19:05,040 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:19:05,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:19:05,041 INFO L85 PathProgramCache]: Analyzing trace with hash -487976442, now seen corresponding path program 1 times [2022-01-31 09:19:05,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:19:05,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109364765] [2022-01-31 09:19:05,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:19:05,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:19:05,067 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:19:05,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803170360] [2022-01-31 09:19:05,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:19:05,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:19:05,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:19:05,069 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:19:05,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 09:19:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:19:05,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 09:19:05,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:19:05,349 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:19:05,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:19:05,484 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:19:05,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:19:05,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109364765] [2022-01-31 09:19:05,485 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:19:05,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803170360] [2022-01-31 09:19:05,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803170360] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:19:05,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:19:05,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-31 09:19:05,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308241812] [2022-01-31 09:19:05,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:19:05,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 09:19:05,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:19:05,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 09:19:05,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-01-31 09:19:05,488 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:19:05,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:19:05,762 INFO L93 Difference]: Finished difference Result 87 states and 112 transitions. [2022-01-31 09:19:05,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 09:19:05,763 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-01-31 09:19:05,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:19:05,765 INFO L225 Difference]: With dead ends: 87 [2022-01-31 09:19:05,765 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 09:19:05,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-01-31 09:19:05,766 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 164 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:19:05,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 68 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:19:05,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 09:19:05,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 48. [2022-01-31 09:19:05,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:19:05,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-01-31 09:19:05,777 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 26 [2022-01-31 09:19:05,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:19:05,777 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-01-31 09:19:05,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:19:05,777 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-01-31 09:19:05,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 09:19:05,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:19:05,778 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:19:05,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 09:19:05,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 09:19:05,980 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:19:05,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:19:05,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1464565319, now seen corresponding path program 2 times [2022-01-31 09:19:05,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:19:05,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381206917] [2022-01-31 09:19:05,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:19:05,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:19:06,016 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:19:06,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [492726673] [2022-01-31 09:19:06,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:19:06,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:19:06,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:19:06,020 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:19:06,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 09:19:06,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-31 09:19:06,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:19:06,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 09:19:06,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:19:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-01-31 09:19:06,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 09:19:06,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:19:06,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381206917] [2022-01-31 09:19:06,324 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:19:06,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492726673] [2022-01-31 09:19:06,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492726673] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:19:06,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:19:06,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 09:19:06,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994142564] [2022-01-31 09:19:06,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:19:06,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 09:19:06,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:19:06,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 09:19:06,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-31 09:19:06,326 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:19:06,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:19:06,393 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2022-01-31 09:19:06,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 09:19:06,394 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 09:19:06,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:19:06,395 INFO L225 Difference]: With dead ends: 60 [2022-01-31 09:19:06,395 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 09:19:06,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-31 09:19:06,396 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:19:06,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 56 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:19:06,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 09:19:06,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-01-31 09:19:06,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.196078431372549) internal successors, (61), 51 states have internal predecessors, (61), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:19:06,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-01-31 09:19:06,403 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 44 [2022-01-31 09:19:06,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:19:06,404 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-01-31 09:19:06,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:19:06,404 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-01-31 09:19:06,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 09:19:06,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:19:06,406 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:19:06,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 09:19:06,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:19:06,620 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:19:06,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:19:06,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1118259974, now seen corresponding path program 1 times [2022-01-31 09:19:06,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:19:06,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484489792] [2022-01-31 09:19:06,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:19:06,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:19:06,647 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:19:06,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567859819] [2022-01-31 09:19:06,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:19:06,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:19:06,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:19:06,658 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:19:06,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 09:19:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:19:06,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 09:19:06,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:19:07,071 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 09:19:07,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:19:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 2 proven. 145 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 09:19:07,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:19:07,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484489792] [2022-01-31 09:19:07,369 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:19:07,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567859819] [2022-01-31 09:19:07,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567859819] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:19:07,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:19:07,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-01-31 09:19:07,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575943279] [2022-01-31 09:19:07,370 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:19:07,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 09:19:07,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:19:07,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 09:19:07,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-01-31 09:19:07,372 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 states have internal predecessors, (80), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:19:08,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:19:08,008 INFO L93 Difference]: Finished difference Result 354 states and 495 transitions. [2022-01-31 09:19:08,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 09:19:08,008 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 states have internal predecessors, (80), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2022-01-31 09:19:08,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:19:08,011 INFO L225 Difference]: With dead ends: 354 [2022-01-31 09:19:08,011 INFO L226 Difference]: Without dead ends: 354 [2022-01-31 09:19:08,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 09:19:08,012 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 374 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 09:19:08,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 92 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 09:19:08,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-01-31 09:19:08,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 96. [2022-01-31 09:19:08,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 87 states have internal predecessors, (103), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:19:08,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2022-01-31 09:19:08,049 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 52 [2022-01-31 09:19:08,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:19:08,049 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2022-01-31 09:19:08,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 states have internal predecessors, (80), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:19:08,050 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2022-01-31 09:19:08,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 09:19:08,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:19:08,052 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:19:08,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 09:19:08,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:19:08,263 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:19:08,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:19:08,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1260735770, now seen corresponding path program 2 times [2022-01-31 09:19:08,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:19:08,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434190326] [2022-01-31 09:19:08,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:19:08,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:19:08,299 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:19:08,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522229114] [2022-01-31 09:19:08,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:19:08,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:19:08,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:19:08,303 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:19:08,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 09:19:08,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:19:08,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:19:08,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 09:19:08,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:19:09,106 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 09:19:09,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:19:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 2 proven. 715 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 09:19:09,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:19:09,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434190326] [2022-01-31 09:19:09,888 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:19:09,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522229114] [2022-01-31 09:19:09,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522229114] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:19:09,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:19:09,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-01-31 09:19:09,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825191515] [2022-01-31 09:19:09,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:19:09,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 09:19:09,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:19:09,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 09:19:09,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 09:19:09,892 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:19:11,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:19:11,492 INFO L93 Difference]: Finished difference Result 732 states and 1035 transitions. [2022-01-31 09:19:11,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 09:19:11,494 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 88 [2022-01-31 09:19:11,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:19:11,499 INFO L225 Difference]: With dead ends: 732 [2022-01-31 09:19:11,499 INFO L226 Difference]: Without dead ends: 732 [2022-01-31 09:19:11,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 09:19:11,504 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 931 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 09:19:11,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [954 Valid, 147 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 09:19:11,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-01-31 09:19:11,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 168. [2022-01-31 09:19:11,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 159 states have (on average 1.1761006289308176) internal successors, (187), 159 states have internal predecessors, (187), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:19:11,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 196 transitions. [2022-01-31 09:19:11,536 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 196 transitions. Word has length 88 [2022-01-31 09:19:11,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:19:11,536 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 196 transitions. [2022-01-31 09:19:11,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:19:11,536 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 196 transitions. [2022-01-31 09:19:11,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-31 09:19:11,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:19:11,542 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 23, 23, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:19:11,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 09:19:11,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:19:11,768 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:19:11,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:19:11,769 INFO L85 PathProgramCache]: Analyzing trace with hash -2038883674, now seen corresponding path program 3 times [2022-01-31 09:19:11,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:19:11,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538028524] [2022-01-31 09:19:11,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:19:11,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:19:11,811 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:19:11,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767822571] [2022-01-31 09:19:11,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:19:11,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:19:11,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:19:11,813 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:19:11,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 09:19:11,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-31 09:19:11,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:19:11,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 09:19:11,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:19:12,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3156 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2022-01-31 09:19:12,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:19:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3156 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2022-01-31 09:19:14,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:19:14,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538028524] [2022-01-31 09:19:14,292 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:19:14,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767822571] [2022-01-31 09:19:14,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767822571] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:19:14,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:19:14,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-01-31 09:19:14,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130796603] [2022-01-31 09:19:14,292 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:19:14,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 09:19:14,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:19:14,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 09:19:14,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-01-31 09:19:14,294 INFO L87 Difference]: Start difference. First operand 168 states and 196 transitions. Second operand has 12 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 09:19:14,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:19:14,443 INFO L93 Difference]: Finished difference Result 188 states and 223 transitions. [2022-01-31 09:19:14,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 09:19:14,444 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 160 [2022-01-31 09:19:14,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:19:14,445 INFO L225 Difference]: With dead ends: 188 [2022-01-31 09:19:14,445 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 09:19:14,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 309 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2022-01-31 09:19:14,446 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 62 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:19:14,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 75 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:19:14,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 09:19:14,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-01-31 09:19:14,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 174 states have (on average 1.1839080459770115) internal successors, (206), 174 states have internal predecessors, (206), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 09:19:14,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 223 transitions. [2022-01-31 09:19:14,453 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 223 transitions. Word has length 160 [2022-01-31 09:19:14,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:19:14,454 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 223 transitions. [2022-01-31 09:19:14,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 09:19:14,454 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 223 transitions. [2022-01-31 09:19:14,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-31 09:19:14,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:19:14,466 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 23, 23, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:19:14,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 09:19:14,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:19:14,690 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:19:14,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:19:14,691 INFO L85 PathProgramCache]: Analyzing trace with hash -132909150, now seen corresponding path program 4 times [2022-01-31 09:19:14,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:19:14,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404830185] [2022-01-31 09:19:14,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:19:14,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:19:14,730 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:19:14,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337041718] [2022-01-31 09:19:14,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:19:14,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:19:14,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:19:14,732 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:19:14,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 09:19:14,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:19:14,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:19:14,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-31 09:19:14,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:19:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 3015 proven. 201 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:19:16,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:19:21,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 3025 proven. 191 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:19:21,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:19:21,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404830185] [2022-01-31 09:19:21,937 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:19:21,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337041718] [2022-01-31 09:19:21,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337041718] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:19:21,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:19:21,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57] total 111 [2022-01-31 09:19:21,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527785092] [2022-01-31 09:19:21,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:19:21,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 09:19:21,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:19:21,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 09:19:21,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4058, Invalid=8152, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 09:19:21,943 INFO L87 Difference]: Start difference. First operand 188 states and 223 transitions. Second operand has 111 states, 109 states have (on average 3.0) internal successors, (327), 110 states have internal predecessors, (327), 13 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 09:21:08,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:21:08,648 INFO L93 Difference]: Finished difference Result 2774 states and 3964 transitions. [2022-01-31 09:21:08,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 500 states. [2022-01-31 09:21:08,649 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 109 states have (on average 3.0) internal successors, (327), 110 states have internal predecessors, (327), 13 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 192 [2022-01-31 09:21:08,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:21:08,661 INFO L225 Difference]: With dead ends: 2774 [2022-01-31 09:21:08,662 INFO L226 Difference]: Without dead ends: 2774 [2022-01-31 09:21:08,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 877 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 602 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187072 ImplicationChecksByTransitivity, 94.0s TimeCoverageRelationStatistics Valid=102704, Invalid=261508, Unknown=0, NotChecked=0, Total=364212 [2022-01-31 09:21:08,705 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 1009 mSDsluCounter, 1722 mSDsCounter, 0 mSdLazyCounter, 11938 mSolverCounterSat, 3068 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1010 SdHoareTripleChecker+Valid, 1825 SdHoareTripleChecker+Invalid, 15006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3068 IncrementalHoareTripleChecker+Valid, 11938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2022-01-31 09:21:08,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1010 Valid, 1825 Invalid, 15006 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3068 Valid, 11938 Invalid, 0 Unknown, 0 Unchecked, 11.8s Time] [2022-01-31 09:21:08,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2774 states. [2022-01-31 09:21:08,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2774 to 1699. [2022-01-31 09:21:08,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1307 states have (on average 1.312930374904361) internal successors, (1716), 1308 states have internal predecessors, (1716), 386 states have call successors, (386), 6 states have call predecessors, (386), 5 states have return successors, (385), 384 states have call predecessors, (385), 385 states have call successors, (385) [2022-01-31 09:21:08,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2487 transitions. [2022-01-31 09:21:08,776 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2487 transitions. Word has length 192 [2022-01-31 09:21:08,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:21:08,777 INFO L470 AbstractCegarLoop]: Abstraction has 1699 states and 2487 transitions. [2022-01-31 09:21:08,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 109 states have (on average 3.0) internal successors, (327), 110 states have internal predecessors, (327), 13 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 09:21:08,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2487 transitions. [2022-01-31 09:21:08,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-01-31 09:21:08,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:21:08,781 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 23, 23, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:21:08,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 09:21:08,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:21:08,995 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:21:08,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:21:08,995 INFO L85 PathProgramCache]: Analyzing trace with hash -975228961, now seen corresponding path program 5 times [2022-01-31 09:21:08,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:21:08,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105969493] [2022-01-31 09:21:08,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:21:08,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:21:09,079 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:21:09,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961112861] [2022-01-31 09:21:09,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:21:09,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:21:09,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:21:09,081 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:21:09,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 09:24:51,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-01-31 09:24:51,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:24:51,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-31 09:24:51,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:24:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3415 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-01-31 09:24:53,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:24:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3415 backedges. 16 proven. 3151 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2022-01-31 09:24:56,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:24:56,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105969493] [2022-01-31 09:24:56,311 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:24:56,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961112861] [2022-01-31 09:24:56,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961112861] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:24:56,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:24:56,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-01-31 09:24:56,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899925] [2022-01-31 09:24:56,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:24:56,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 09:24:56,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:24:56,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 09:24:56,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 09:24:56,315 INFO L87 Difference]: Start difference. First operand 1699 states and 2487 transitions. Second operand has 98 states, 98 states have (on average 3.020408163265306) internal successors, (296), 98 states have internal predecessors, (296), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:25:04,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:25:04,485 INFO L93 Difference]: Finished difference Result 34219 states and 51091 transitions. [2022-01-31 09:25:04,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 09:25:04,486 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.020408163265306) internal successors, (296), 98 states have internal predecessors, (296), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 216 [2022-01-31 09:25:04,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:25:04,622 INFO L225 Difference]: With dead ends: 34219 [2022-01-31 09:25:04,623 INFO L226 Difference]: Without dead ends: 34219 [2022-01-31 09:25:04,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 09:25:04,626 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 2246 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 1490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2293 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1490 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 09:25:04,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2293 Valid, 236 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1490 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 09:25:04,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34219 states. [2022-01-31 09:25:05,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34219 to 1843. [2022-01-31 09:25:05,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1451 states have (on average 1.2984148862853204) internal successors, (1884), 1452 states have internal predecessors, (1884), 386 states have call successors, (386), 6 states have call predecessors, (386), 5 states have return successors, (385), 384 states have call predecessors, (385), 385 states have call successors, (385) [2022-01-31 09:25:05,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2655 transitions. [2022-01-31 09:25:05,345 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2655 transitions. Word has length 216 [2022-01-31 09:25:05,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:25:05,345 INFO L470 AbstractCegarLoop]: Abstraction has 1843 states and 2655 transitions. [2022-01-31 09:25:05,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.020408163265306) internal successors, (296), 98 states have internal predecessors, (296), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:25:05,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2655 transitions. [2022-01-31 09:25:05,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2022-01-31 09:25:05,387 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:25:05,388 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 47, 47, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:25:05,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-31 09:25:05,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 09:25:05,588 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:25:05,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:25:05,589 INFO L85 PathProgramCache]: Analyzing trace with hash 363716447, now seen corresponding path program 6 times [2022-01-31 09:25:05,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:25:05,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995812245] [2022-01-31 09:25:05,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:25:05,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:25:05,653 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:25:05,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [364035447] [2022-01-31 09:25:05,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:25:05,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:25:05,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:25:05,655 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:25:05,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 09:25:07,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-01-31 09:25:07,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:25:07,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 09:25:07,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:25:08,422 INFO L134 CoverageAnalysis]: Checked inductivity of 13471 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 13319 trivial. 0 not checked. [2022-01-31 09:25:08,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:25:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 13471 backedges. 16 proven. 136 refuted. 0 times theorem prover too weak. 13319 trivial. 0 not checked. [2022-01-31 09:25:12,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:25:12,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995812245] [2022-01-31 09:25:12,633 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:25:12,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364035447] [2022-01-31 09:25:12,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364035447] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:25:12,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:25:12,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2022-01-31 09:25:12,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989977106] [2022-01-31 09:25:12,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:25:12,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 09:25:12,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:25:12,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 09:25:12,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2022-01-31 09:25:12,635 INFO L87 Difference]: Start difference. First operand 1843 states and 2655 transitions. Second operand has 26 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 25 states have internal predecessors, (79), 21 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (18), 18 states have call predecessors, (18), 17 states have call successors, (18) [2022-01-31 09:25:13,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:25:13,527 INFO L93 Difference]: Finished difference Result 7710 states and 11455 transitions. [2022-01-31 09:25:13,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 09:25:13,529 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 25 states have internal predecessors, (79), 21 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (18), 18 states have call predecessors, (18), 17 states have call successors, (18) Word has length 360 [2022-01-31 09:25:13,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:25:13,549 INFO L225 Difference]: With dead ends: 7710 [2022-01-31 09:25:13,549 INFO L226 Difference]: Without dead ends: 7710 [2022-01-31 09:25:13,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 695 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=512, Invalid=894, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 09:25:13,550 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 254 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:25:13,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 112 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:25:13,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7710 states. [2022-01-31 09:25:13,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7710 to 7710. [2022-01-31 09:25:13,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7710 states, 5843 states have (on average 1.3243196987848709) internal successors, (7738), 5855 states have internal predecessors, (7738), 1859 states have call successors, (1859), 8 states have call predecessors, (1859), 7 states have return successors, (1858), 1846 states have call predecessors, (1858), 1858 states have call successors, (1858) [2022-01-31 09:25:13,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7710 states to 7710 states and 11455 transitions. [2022-01-31 09:25:13,700 INFO L78 Accepts]: Start accepts. Automaton has 7710 states and 11455 transitions. Word has length 360 [2022-01-31 09:25:13,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:25:13,701 INFO L470 AbstractCegarLoop]: Abstraction has 7710 states and 11455 transitions. [2022-01-31 09:25:13,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 25 states have internal predecessors, (79), 21 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (18), 18 states have call predecessors, (18), 17 states have call successors, (18) [2022-01-31 09:25:13,701 INFO L276 IsEmpty]: Start isEmpty. Operand 7710 states and 11455 transitions. [2022-01-31 09:25:13,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2022-01-31 09:25:13,707 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:25:13,707 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 47, 47, 20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:25:13,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 09:25:13,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:25:13,918 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:25:13,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:25:13,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1013642604, now seen corresponding path program 7 times [2022-01-31 09:25:13,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:25:13,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140392258] [2022-01-31 09:25:13,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:25:13,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:25:14,006 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:25:14,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1689351282] [2022-01-31 09:25:14,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 09:25:14,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:25:14,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:25:14,007 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:25:14,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 09:25:14,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:25:14,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 1368 conjuncts, 97 conjunts are in the unsatisfiable core [2022-01-31 09:25:14,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:25:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 14670 backedges. 0 proven. 13207 refuted. 0 times theorem prover too weak. 1463 trivial. 0 not checked. [2022-01-31 09:25:18,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:25:39,120 INFO L134 CoverageAnalysis]: Checked inductivity of 14670 backedges. 38 proven. 13207 refuted. 0 times theorem prover too weak. 1425 trivial. 0 not checked. [2022-01-31 09:25:39,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:25:39,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140392258] [2022-01-31 09:25:39,120 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:25:39,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689351282] [2022-01-31 09:25:39,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689351282] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:25:39,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:25:39,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 194 [2022-01-31 09:25:39,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597619990] [2022-01-31 09:25:39,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:25:39,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-01-31 09:25:39,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:25:39,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-01-31 09:25:39,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18531, Invalid=18911, Unknown=0, NotChecked=0, Total=37442 [2022-01-31 09:25:39,128 INFO L87 Difference]: Start difference. First operand 7710 states and 11455 transitions. Second operand has 194 states, 194 states have (on average 3.0103092783505154) internal successors, (584), 194 states have internal predecessors, (584), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:26:52,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:26:52,668 INFO L93 Difference]: Finished difference Result 398011 states and 596369 transitions. [2022-01-31 09:26:52,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-01-31 09:26:52,669 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 3.0103092783505154) internal successors, (584), 194 states have internal predecessors, (584), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 448 [2022-01-31 09:26:52,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:26:54,342 INFO L225 Difference]: With dead ends: 398011 [2022-01-31 09:26:54,343 INFO L226 Difference]: Without dead ends: 398011 [2022-01-31 09:26:54,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 703 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18145 ImplicationChecksByTransitivity, 69.6s TimeCoverageRelationStatistics Valid=36961, Invalid=46271, Unknown=0, NotChecked=0, Total=83232 [2022-01-31 09:26:54,440 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 4764 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 2188 mSolverCounterSat, 3136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4859 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 5324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3136 IncrementalHoareTripleChecker+Valid, 2188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:26:54,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4859 Valid, 428 Invalid, 5324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3136 Valid, 2188 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2022-01-31 09:26:54,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398011 states. [2022-01-31 09:27:00,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398011 to 7998. [2022-01-31 09:27:00,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7998 states, 6131 states have (on average 1.3169140433860709) internal successors, (8074), 6143 states have internal predecessors, (8074), 1859 states have call successors, (1859), 8 states have call predecessors, (1859), 7 states have return successors, (1858), 1846 states have call predecessors, (1858), 1858 states have call successors, (1858) [2022-01-31 09:27:00,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7998 states to 7998 states and 11791 transitions. [2022-01-31 09:27:00,971 INFO L78 Accepts]: Start accepts. Automaton has 7998 states and 11791 transitions. Word has length 448 [2022-01-31 09:27:00,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:27:00,972 INFO L470 AbstractCegarLoop]: Abstraction has 7998 states and 11791 transitions. [2022-01-31 09:27:00,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 3.0103092783505154) internal successors, (584), 194 states have internal predecessors, (584), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:27:00,972 INFO L276 IsEmpty]: Start isEmpty. Operand 7998 states and 11791 transitions. [2022-01-31 09:27:00,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 737 [2022-01-31 09:27:00,986 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:27:00,986 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 95, 95, 20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:27:01,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 09:27:01,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 09:27:01,211 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:27:01,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:27:01,212 INFO L85 PathProgramCache]: Analyzing trace with hash 254208404, now seen corresponding path program 8 times [2022-01-31 09:27:01,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:27:01,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426358299] [2022-01-31 09:27:01,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:27:01,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:27:01,354 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:27:01,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889036801] [2022-01-31 09:27:01,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:27:01,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:27:01,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:27:01,356 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:27:01,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 09:27:01,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:27:01,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:27:01,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 2328 conjuncts, 193 conjunts are in the unsatisfiable core [2022-01-31 09:27:01,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:27:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 55518 backedges. 0 proven. 54055 refuted. 0 times theorem prover too weak. 1463 trivial. 0 not checked. [2022-01-31 09:27:15,961 INFO L328 TraceCheckSpWp]: Computing backward predicates...