/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 10:41:03,560 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 10:41:03,561 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 10:41:03,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 10:41:03,606 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 10:41:03,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 10:41:03,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 10:41:03,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 10:41:03,614 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 10:41:03,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 10:41:03,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 10:41:03,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 10:41:03,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 10:41:03,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 10:41:03,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 10:41:03,626 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 10:41:03,626 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 10:41:03,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 10:41:03,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 10:41:03,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 10:41:03,636 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 10:41:03,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 10:41:03,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 10:41:03,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 10:41:03,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 10:41:03,645 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-19 10:41:03,645 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-19 10:41:03,645 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-19 10:41:03,646 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-19 10:41:03,646 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-19 10:41:03,647 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-19 10:41:03,647 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-19 10:41:03,649 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-19 10:41:03,649 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-19 10:41:03,650 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-19 10:41:03,651 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-19 10:41:03,651 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-19 10:41:03,651 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-19 10:41:03,652 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-19 10:41:03,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 10:41:03,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 10:41:03,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 10:41:03,654 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 10:41:03,662 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 10:41:03,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 10:41:03,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 10:41:03,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 10:41:03,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 10:41:03,664 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 10:41:03,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 10:41:03,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 10:41:03,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 10:41:03,665 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 10:41:03,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 10:41:03,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 10:41:03,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 10:41:03,666 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 10:41:03,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 10:41:03,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 10:41:03,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 10:41:03,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 10:41:03,666 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 10:41:03,666 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 10:41:03,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 10:41:03,666 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 10:41:03,667 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 10:41:03,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 10:41:03,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 10:41:03,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 10:41:03,913 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 10:41:03,914 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 10:41:03,915 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound20.c [2022-03-19 10:41:03,966 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a1f12f0f/920237b1a56e48829628d247445ad570/FLAG88a74f588 [2022-03-19 10:41:04,297 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 10:41:04,298 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound20.c [2022-03-19 10:41:04,306 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a1f12f0f/920237b1a56e48829628d247445ad570/FLAG88a74f588 [2022-03-19 10:41:04,722 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a1f12f0f/920237b1a56e48829628d247445ad570 [2022-03-19 10:41:04,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 10:41:04,725 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 10:41:04,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 10:41:04,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 10:41:04,733 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 10:41:04,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:41:04" (1/1) ... [2022-03-19 10:41:04,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@288be84d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:41:04, skipping insertion in model container [2022-03-19 10:41:04,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:41:04" (1/1) ... [2022-03-19 10:41:04,739 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 10:41:04,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 10:41:04,860 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound20.c[535,548] [2022-03-19 10:41:04,882 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 10:41:04,889 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 10:41:04,900 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound20.c[535,548] [2022-03-19 10:41:04,914 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 10:41:04,924 INFO L208 MainTranslator]: Completed translation [2022-03-19 10:41:04,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:41:04 WrapperNode [2022-03-19 10:41:04,925 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 10:41:04,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 10:41:04,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 10:41:04,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 10:41:04,937 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:41:04" (1/1) ... [2022-03-19 10:41:04,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:41:04" (1/1) ... [2022-03-19 10:41:04,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:41:04" (1/1) ... [2022-03-19 10:41:04,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:41:04" (1/1) ... [2022-03-19 10:41:04,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:41:04" (1/1) ... [2022-03-19 10:41:04,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:41:04" (1/1) ... [2022-03-19 10:41:04,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:41:04" (1/1) ... [2022-03-19 10:41:04,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 10:41:04,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 10:41:04,952 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 10:41:04,952 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 10:41:04,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:41:04" (1/1) ... [2022-03-19 10:41:04,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 10:41:04,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:04,987 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 10:41:05,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 10:41:05,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 10:41:05,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 10:41:05,032 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 10:41:05,032 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 10:41:05,033 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 10:41:05,033 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 10:41:05,033 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 10:41:05,033 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 10:41:05,033 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 10:41:05,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 10:41:05,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 10:41:05,034 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 10:41:05,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 10:41:05,034 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 10:41:05,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 10:41:05,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 10:41:05,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 10:41:05,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 10:41:05,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 10:41:05,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 10:41:05,100 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 10:41:05,101 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 10:41:05,252 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 10:41:05,257 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 10:41:05,257 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-19 10:41:05,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:41:05 BoogieIcfgContainer [2022-03-19 10:41:05,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 10:41:05,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 10:41:05,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 10:41:05,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 10:41:05,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 10:41:04" (1/3) ... [2022-03-19 10:41:05,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@775e509c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:41:05, skipping insertion in model container [2022-03-19 10:41:05,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:41:04" (2/3) ... [2022-03-19 10:41:05,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@775e509c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:41:05, skipping insertion in model container [2022-03-19 10:41:05,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:41:05" (3/3) ... [2022-03-19 10:41:05,281 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound20.c [2022-03-19 10:41:05,285 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 10:41:05,285 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 10:41:05,333 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 10:41:05,356 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 10:41:05,356 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 10:41:05,378 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 10:41:05,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 10:41:05,384 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:05,385 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:05,385 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:05,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:05,389 INFO L85 PathProgramCache]: Analyzing trace with hash 928708300, now seen corresponding path program 1 times [2022-03-19 10:41:05,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:05,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1963275677] [2022-03-19 10:41:05,405 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:05,406 INFO L85 PathProgramCache]: Analyzing trace with hash 928708300, now seen corresponding path program 2 times [2022-03-19 10:41:05,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:05,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101231442] [2022-03-19 10:41:05,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:05,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:05,502 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:05,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [616909644] [2022-03-19 10:41:05,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:41:05,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:05,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:05,506 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:05,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 10:41:05,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 10:41:05,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:05,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 1 conjunts are in the unsatisfiable core [2022-03-19 10:41:05,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:05,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 10:41:05,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:41:05,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:05,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101231442] [2022-03-19 10:41:05,680 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:05,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616909644] [2022-03-19 10:41:05,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616909644] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:05,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:05,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-19 10:41:05,684 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:05,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1963275677] [2022-03-19 10:41:05,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1963275677] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:05,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:05,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-19 10:41:05,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747987852] [2022-03-19 10:41:05,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:05,690 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-03-19 10:41:05,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:05,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-03-19 10:41:05,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-19 10:41:05,719 INFO L87 Difference]: Start difference. First operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 10:41:05,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:05,751 INFO L93 Difference]: Finished difference Result 67 states and 100 transitions. [2022-03-19 10:41:05,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-03-19 10:41:05,752 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-03-19 10:41:05,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:05,759 INFO L225 Difference]: With dead ends: 67 [2022-03-19 10:41:05,759 INFO L226 Difference]: Without dead ends: 32 [2022-03-19 10:41:05,763 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-19 10:41:05,770 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:05,772 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:41:05,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-19 10:41:05,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-19 10:41:05,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 10:41:05,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-19 10:41:05,817 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 22 [2022-03-19 10:41:05,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:05,818 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-19 10:41:05,818 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 10:41:05,819 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-19 10:41:05,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 10:41:05,820 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:05,821 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:05,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:06,040 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-03-19 10:41:06,040 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:06,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:06,041 INFO L85 PathProgramCache]: Analyzing trace with hash -155606603, now seen corresponding path program 1 times [2022-03-19 10:41:06,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:06,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1232140516] [2022-03-19 10:41:06,043 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:06,043 INFO L85 PathProgramCache]: Analyzing trace with hash -155606603, now seen corresponding path program 2 times [2022-03-19 10:41:06,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:06,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583544930] [2022-03-19 10:41:06,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:06,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:06,062 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:06,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096369869] [2022-03-19 10:41:06,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:41:06,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:06,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:06,069 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) [2022-03-19 10:41:06,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 10:41:06,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 10:41:06,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:06,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 10:41:06,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:06,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:06,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:41:06,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:06,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583544930] [2022-03-19 10:41:06,201 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:06,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096369869] [2022-03-19 10:41:06,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096369869] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:06,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:06,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 10:41:06,202 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:06,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1232140516] [2022-03-19 10:41:06,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1232140516] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:06,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:06,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 10:41:06,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647983342] [2022-03-19 10:41:06,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:06,203 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 10:41:06,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:06,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 10:41:06,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 10:41:06,204 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 10:41:06,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:06,220 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2022-03-19 10:41:06,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 10:41:06,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-19 10:41:06,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:06,221 INFO L225 Difference]: With dead ends: 41 [2022-03-19 10:41:06,221 INFO L226 Difference]: Without dead ends: 34 [2022-03-19 10:41:06,222 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 10:41:06,223 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:06,223 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:41:06,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-19 10:41:06,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-19 10:41:06,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 10:41:06,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-03-19 10:41:06,229 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 23 [2022-03-19 10:41:06,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:06,230 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-03-19 10:41:06,231 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 10:41:06,231 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-03-19 10:41:06,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 10:41:06,231 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:06,231 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:06,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:06,454 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-03-19 10:41:06,454 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:06,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:06,455 INFO L85 PathProgramCache]: Analyzing trace with hash -153938307, now seen corresponding path program 1 times [2022-03-19 10:41:06,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:06,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1400676078] [2022-03-19 10:41:06,456 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:06,456 INFO L85 PathProgramCache]: Analyzing trace with hash -153938307, now seen corresponding path program 2 times [2022-03-19 10:41:06,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:06,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190676387] [2022-03-19 10:41:06,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:06,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:06,474 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:06,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609567966] [2022-03-19 10:41:06,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:41:06,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:06,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:06,476 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:06,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 10:41:06,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 10:41:06,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:06,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 10:41:06,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:06,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:41:06,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:06,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190676387] [2022-03-19 10:41:06,811 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:06,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609567966] [2022-03-19 10:41:06,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609567966] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:06,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:06,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:41:06,812 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:06,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1400676078] [2022-03-19 10:41:06,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1400676078] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:06,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:06,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:41:06,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826010115] [2022-03-19 10:41:06,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:06,813 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:41:06,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:06,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:41:06,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:41:06,814 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 10:41:09,367 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:41:11,390 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:41:11,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:11,429 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2022-03-19 10:41:11,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:41:11,429 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-19 10:41:11,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:11,431 INFO L225 Difference]: With dead ends: 53 [2022-03-19 10:41:11,431 INFO L226 Difference]: Without dead ends: 51 [2022-03-19 10:41:11,432 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 10:41:11,433 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:11,433 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 126 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2022-03-19 10:41:11,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-19 10:41:11,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-19 10:41:11,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 10:41:11,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2022-03-19 10:41:11,445 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 23 [2022-03-19 10:41:11,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:11,445 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2022-03-19 10:41:11,445 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 10:41:11,446 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2022-03-19 10:41:11,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 10:41:11,446 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:11,446 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:11,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:11,663 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:11,664 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:11,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:11,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1676885497, now seen corresponding path program 1 times [2022-03-19 10:41:11,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:11,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1821229047] [2022-03-19 10:41:11,665 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:11,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1676885497, now seen corresponding path program 2 times [2022-03-19 10:41:11,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:11,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67107331] [2022-03-19 10:41:11,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:11,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:11,675 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:11,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1166957704] [2022-03-19 10:41:11,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:41:11,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:11,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:11,676 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:11,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 10:41:11,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:41:11,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:11,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 10:41:11,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:11,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:11,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:12,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:12,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:12,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67107331] [2022-03-19 10:41:12,080 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:12,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166957704] [2022-03-19 10:41:12,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166957704] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:12,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:12,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-19 10:41:12,081 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:12,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1821229047] [2022-03-19 10:41:12,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1821229047] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:12,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:12,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 10:41:12,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100772700] [2022-03-19 10:41:12,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:12,085 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 10:41:12,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:12,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 10:41:12,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-19 10:41:12,086 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 10:41:12,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:12,194 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2022-03-19 10:41:12,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 10:41:12,194 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-03-19 10:41:12,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:12,199 INFO L225 Difference]: With dead ends: 57 [2022-03-19 10:41:12,199 INFO L226 Difference]: Without dead ends: 52 [2022-03-19 10:41:12,201 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-19 10:41:12,204 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 24 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:12,205 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 175 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:41:12,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-19 10:41:12,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2022-03-19 10:41:12,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 10:41:12,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-03-19 10:41:12,223 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 29 [2022-03-19 10:41:12,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:12,224 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-03-19 10:41:12,224 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 10:41:12,224 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-03-19 10:41:12,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 10:41:12,225 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:12,225 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:12,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:12,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:12,439 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:12,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:12,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1154059858, now seen corresponding path program 1 times [2022-03-19 10:41:12,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:12,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1786334840] [2022-03-19 10:41:12,441 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:12,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1154059858, now seen corresponding path program 2 times [2022-03-19 10:41:12,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:12,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371789965] [2022-03-19 10:41:12,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:12,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:12,450 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:12,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [905306936] [2022-03-19 10:41:12,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:41:12,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:12,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:12,456 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:12,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 10:41:12,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:41:12,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:12,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 10:41:12,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:12,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:12,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:41:12,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:12,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371789965] [2022-03-19 10:41:12,716 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:12,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905306936] [2022-03-19 10:41:12,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905306936] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:12,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:12,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:41:12,717 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:12,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1786334840] [2022-03-19 10:41:12,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1786334840] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:12,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:12,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:41:12,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749632915] [2022-03-19 10:41:12,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:12,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:41:12,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:12,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:41:12,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:41:12,718 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 10:41:12,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:12,765 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2022-03-19 10:41:12,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:41:12,766 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2022-03-19 10:41:12,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:12,766 INFO L225 Difference]: With dead ends: 65 [2022-03-19 10:41:12,766 INFO L226 Difference]: Without dead ends: 44 [2022-03-19 10:41:12,767 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:41:12,767 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:12,768 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 120 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:41:12,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-19 10:41:12,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-19 10:41:12,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 10:41:12,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-03-19 10:41:12,778 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 35 [2022-03-19 10:41:12,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:12,779 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-03-19 10:41:12,779 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 10:41:12,779 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-03-19 10:41:12,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 10:41:12,780 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:12,780 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:12,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:12,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:12,987 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:12,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:12,988 INFO L85 PathProgramCache]: Analyzing trace with hash -174895632, now seen corresponding path program 1 times [2022-03-19 10:41:12,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:12,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1854951160] [2022-03-19 10:41:12,989 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:12,989 INFO L85 PathProgramCache]: Analyzing trace with hash -174895632, now seen corresponding path program 2 times [2022-03-19 10:41:12,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:12,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486997449] [2022-03-19 10:41:12,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:12,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:13,000 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:13,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7755118] [2022-03-19 10:41:13,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:41:13,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:13,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:13,010 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) [2022-03-19 10:41:13,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 10:41:13,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:41:13,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:13,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 10:41:13,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:13,134 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:13,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-19 10:41:13,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:13,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486997449] [2022-03-19 10:41:13,250 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:13,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7755118] [2022-03-19 10:41:13,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7755118] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 10:41:13,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:41:13,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-03-19 10:41:13,251 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:13,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1854951160] [2022-03-19 10:41:13,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1854951160] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:13,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:13,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 10:41:13,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902229520] [2022-03-19 10:41:13,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:13,252 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 10:41:13,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:13,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 10:41:13,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-19 10:41:13,252 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 10:41:13,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:13,298 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2022-03-19 10:41:13,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 10:41:13,304 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-03-19 10:41:13,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:13,308 INFO L225 Difference]: With dead ends: 74 [2022-03-19 10:41:13,308 INFO L226 Difference]: Without dead ends: 53 [2022-03-19 10:41:13,308 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-19 10:41:13,310 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 22 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:13,310 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 125 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:41:13,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-19 10:41:13,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-03-19 10:41:13,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 10:41:13,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-03-19 10:41:13,335 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 41 [2022-03-19 10:41:13,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:13,335 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-03-19 10:41:13,335 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 10:41:13,335 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-03-19 10:41:13,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 10:41:13,343 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:13,343 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:13,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:13,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:13,563 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:13,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:13,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1292932747, now seen corresponding path program 1 times [2022-03-19 10:41:13,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:13,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1057869007] [2022-03-19 10:41:13,565 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:13,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1292932747, now seen corresponding path program 2 times [2022-03-19 10:41:13,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:13,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778463974] [2022-03-19 10:41:13,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:13,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:13,574 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:13,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224417975] [2022-03-19 10:41:13,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:41:13,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:13,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:13,576 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) [2022-03-19 10:41:13,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 10:41:13,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:41:13,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:13,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 10:41:13,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:13,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:13,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-19 10:41:13,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:13,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778463974] [2022-03-19 10:41:13,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:13,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224417975] [2022-03-19 10:41:13,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224417975] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:13,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:13,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-19 10:41:13,832 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:13,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1057869007] [2022-03-19 10:41:13,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1057869007] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:13,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:13,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 10:41:13,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402595603] [2022-03-19 10:41:13,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:13,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 10:41:13,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:13,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 10:41:13,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-19 10:41:13,833 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 10:41:13,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:13,884 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-03-19 10:41:13,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 10:41:13,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 43 [2022-03-19 10:41:13,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:13,885 INFO L225 Difference]: With dead ends: 75 [2022-03-19 10:41:13,885 INFO L226 Difference]: Without dead ends: 54 [2022-03-19 10:41:13,886 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-03-19 10:41:13,886 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 9 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:13,886 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 125 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:41:13,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-19 10:41:13,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-19 10:41:13,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 10:41:13,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-03-19 10:41:13,900 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 43 [2022-03-19 10:41:13,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:13,900 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-03-19 10:41:13,900 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 10:41:13,900 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-03-19 10:41:13,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 10:41:13,901 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:13,901 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:13,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:14,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:14,123 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:14,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:14,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1407897436, now seen corresponding path program 1 times [2022-03-19 10:41:14,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:14,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1578129210] [2022-03-19 10:41:14,124 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:14,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1407897436, now seen corresponding path program 2 times [2022-03-19 10:41:14,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:14,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432652113] [2022-03-19 10:41:14,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:14,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:14,134 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:14,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193070540] [2022-03-19 10:41:14,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:41:14,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:14,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:14,142 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) [2022-03-19 10:41:14,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 10:41:14,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:41:14,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:14,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-19 10:41:14,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 10:41:14,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:41:14,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:14,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432652113] [2022-03-19 10:41:14,306 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:14,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193070540] [2022-03-19 10:41:14,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193070540] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:14,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:14,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 10:41:14,307 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:14,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1578129210] [2022-03-19 10:41:14,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1578129210] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:14,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:14,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 10:41:14,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077735168] [2022-03-19 10:41:14,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:14,307 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 10:41:14,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:14,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 10:41:14,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-19 10:41:14,308 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-19 10:41:14,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:14,346 INFO L93 Difference]: Finished difference Result 101 states and 131 transitions. [2022-03-19 10:41:14,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 10:41:14,347 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2022-03-19 10:41:14,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:14,348 INFO L225 Difference]: With dead ends: 101 [2022-03-19 10:41:14,348 INFO L226 Difference]: Without dead ends: 80 [2022-03-19 10:41:14,348 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-19 10:41:14,349 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 19 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:14,349 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 107 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:41:14,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-19 10:41:14,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2022-03-19 10:41:14,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 14 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 10:41:14,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2022-03-19 10:41:14,367 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 47 [2022-03-19 10:41:14,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:14,367 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2022-03-19 10:41:14,367 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-19 10:41:14,368 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2022-03-19 10:41:14,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 10:41:14,368 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:14,368 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:14,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-19 10:41:14,590 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-03-19 10:41:14,591 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:14,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:14,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1915058849, now seen corresponding path program 1 times [2022-03-19 10:41:14,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:14,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [504799424] [2022-03-19 10:41:14,592 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:14,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1915058849, now seen corresponding path program 2 times [2022-03-19 10:41:14,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:14,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600308699] [2022-03-19 10:41:14,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:14,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:14,600 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:14,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785965312] [2022-03-19 10:41:14,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:41:14,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:14,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:14,602 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) [2022-03-19 10:41:14,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 10:41:14,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:41:14,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:14,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 10:41:14,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:14,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:14,874 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 10:41:14,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:14,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600308699] [2022-03-19 10:41:14,874 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:14,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785965312] [2022-03-19 10:41:14,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785965312] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:14,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:14,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-19 10:41:14,875 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:14,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [504799424] [2022-03-19 10:41:14,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [504799424] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:14,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:14,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 10:41:14,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783118226] [2022-03-19 10:41:14,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:14,876 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 10:41:14,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:14,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 10:41:14,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-19 10:41:14,876 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 10:41:14,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:14,933 INFO L93 Difference]: Finished difference Result 118 states and 153 transitions. [2022-03-19 10:41:14,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 10:41:14,934 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 49 [2022-03-19 10:41:14,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:14,935 INFO L225 Difference]: With dead ends: 118 [2022-03-19 10:41:14,935 INFO L226 Difference]: Without dead ends: 81 [2022-03-19 10:41:14,935 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-03-19 10:41:14,936 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 22 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:14,936 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 134 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:41:14,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-19 10:41:14,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2022-03-19 10:41:14,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 57 states have internal predecessors, (69), 16 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 10:41:14,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2022-03-19 10:41:14,954 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 49 [2022-03-19 10:41:14,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:14,954 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2022-03-19 10:41:14,954 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 10:41:14,954 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2022-03-19 10:41:14,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 10:41:14,955 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:14,955 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:14,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:15,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:15,171 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:15,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:15,172 INFO L85 PathProgramCache]: Analyzing trace with hash -60460648, now seen corresponding path program 3 times [2022-03-19 10:41:15,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:15,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [912505306] [2022-03-19 10:41:15,172 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:15,172 INFO L85 PathProgramCache]: Analyzing trace with hash -60460648, now seen corresponding path program 4 times [2022-03-19 10:41:15,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:15,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406237492] [2022-03-19 10:41:15,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:15,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:15,185 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:15,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699729370] [2022-03-19 10:41:15,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:41:15,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:15,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:15,191 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) [2022-03-19 10:41:15,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 10:41:15,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:41:15,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:15,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 10:41:15,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:15,354 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:15,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:15,473 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 10:41:15,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:15,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406237492] [2022-03-19 10:41:15,474 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:15,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699729370] [2022-03-19 10:41:15,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699729370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:15,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:15,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-19 10:41:15,475 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:15,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [912505306] [2022-03-19 10:41:15,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [912505306] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:15,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:15,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 10:41:15,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906145963] [2022-03-19 10:41:15,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:15,475 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 10:41:15,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:15,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 10:41:15,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-19 10:41:15,476 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 10:41:15,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:15,549 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2022-03-19 10:41:15,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 10:41:15,550 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 51 [2022-03-19 10:41:15,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:15,551 INFO L225 Difference]: With dead ends: 119 [2022-03-19 10:41:15,551 INFO L226 Difference]: Without dead ends: 82 [2022-03-19 10:41:15,551 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2022-03-19 10:41:15,552 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 23 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:15,552 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 121 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:41:15,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-19 10:41:15,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-03-19 10:41:15,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 59 states have internal predecessors, (71), 16 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 10:41:15,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2022-03-19 10:41:15,567 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 51 [2022-03-19 10:41:15,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:15,567 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2022-03-19 10:41:15,568 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 10:41:15,568 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2022-03-19 10:41:15,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 10:41:15,568 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:15,568 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:15,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:15,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 10:41:15,783 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:15,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:15,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1067781299, now seen corresponding path program 1 times [2022-03-19 10:41:15,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:15,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [224740353] [2022-03-19 10:41:15,784 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:15,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1067781299, now seen corresponding path program 2 times [2022-03-19 10:41:15,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:15,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693712484] [2022-03-19 10:41:15,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:15,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:15,792 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:15,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [599196722] [2022-03-19 10:41:15,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:41:15,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:15,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:15,793 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) [2022-03-19 10:41:15,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 10:41:15,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:41:15,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:15,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 10:41:15,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:15,952 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:15,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:16,120 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 10:41:16,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:16,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693712484] [2022-03-19 10:41:16,120 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:16,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599196722] [2022-03-19 10:41:16,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599196722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:16,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:16,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 10:41:16,121 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:16,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [224740353] [2022-03-19 10:41:16,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [224740353] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:16,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:16,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 10:41:16,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055833378] [2022-03-19 10:41:16,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:16,122 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 10:41:16,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:16,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 10:41:16,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-19 10:41:16,123 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 10:41:16,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:16,201 INFO L93 Difference]: Finished difference Result 99 states and 121 transitions. [2022-03-19 10:41:16,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 10:41:16,202 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 55 [2022-03-19 10:41:16,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:16,203 INFO L225 Difference]: With dead ends: 99 [2022-03-19 10:41:16,203 INFO L226 Difference]: Without dead ends: 94 [2022-03-19 10:41:16,203 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-03-19 10:41:16,204 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 33 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:16,204 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 162 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:41:16,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-19 10:41:16,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2022-03-19 10:41:16,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 65 states have (on average 1.2) internal successors, (78), 66 states have internal predecessors, (78), 18 states have call successors, (18), 9 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 10:41:16,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2022-03-19 10:41:16,225 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 55 [2022-03-19 10:41:16,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:16,226 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2022-03-19 10:41:16,226 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 10:41:16,226 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2022-03-19 10:41:16,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-19 10:41:16,227 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:16,227 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:16,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:16,449 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 10:41:16,450 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:16,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:16,450 INFO L85 PathProgramCache]: Analyzing trace with hash -2095290798, now seen corresponding path program 3 times [2022-03-19 10:41:16,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:16,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [177280034] [2022-03-19 10:41:16,451 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:16,451 INFO L85 PathProgramCache]: Analyzing trace with hash -2095290798, now seen corresponding path program 4 times [2022-03-19 10:41:16,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:16,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569495362] [2022-03-19 10:41:16,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:16,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:16,458 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:16,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558011447] [2022-03-19 10:41:16,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:41:16,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:16,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:16,463 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:16,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 10:41:16,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:41:16,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:16,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 10:41:16,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:16,645 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:16,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:16,789 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 10:41:16,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:16,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569495362] [2022-03-19 10:41:16,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:16,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558011447] [2022-03-19 10:41:16,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558011447] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:16,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:16,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 10:41:16,790 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:16,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [177280034] [2022-03-19 10:41:16,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [177280034] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:16,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:16,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 10:41:16,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130719376] [2022-03-19 10:41:16,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:16,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 10:41:16,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:16,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 10:41:16,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-19 10:41:16,792 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 10:41:16,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:16,874 INFO L93 Difference]: Finished difference Result 132 states and 170 transitions. [2022-03-19 10:41:16,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 10:41:16,875 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 57 [2022-03-19 10:41:16,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:16,876 INFO L225 Difference]: With dead ends: 132 [2022-03-19 10:41:16,876 INFO L226 Difference]: Without dead ends: 95 [2022-03-19 10:41:16,876 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-19 10:41:16,877 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 31 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:16,877 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 146 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:41:16,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-19 10:41:16,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-03-19 10:41:16,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 68 states have internal predecessors, (82), 18 states have call successors, (18), 9 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 10:41:16,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2022-03-19 10:41:16,894 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 57 [2022-03-19 10:41:16,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:16,894 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2022-03-19 10:41:16,895 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 10:41:16,895 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2022-03-19 10:41:16,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 10:41:16,895 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:16,895 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:16,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:17,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 10:41:17,103 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:17,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:17,104 INFO L85 PathProgramCache]: Analyzing trace with hash -659642693, now seen corresponding path program 5 times [2022-03-19 10:41:17,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:17,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [690391742] [2022-03-19 10:41:17,104 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:17,105 INFO L85 PathProgramCache]: Analyzing trace with hash -659642693, now seen corresponding path program 6 times [2022-03-19 10:41:17,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:17,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688228530] [2022-03-19 10:41:17,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:17,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:17,120 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:17,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428215551] [2022-03-19 10:41:17,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:41:17,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:17,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:17,123 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:17,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 10:41:17,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 10:41:17,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:17,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 10:41:17,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:17,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:17,519 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 10:41:17,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:17,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688228530] [2022-03-19 10:41:17,520 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:17,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428215551] [2022-03-19 10:41:17,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428215551] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:17,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:17,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 10:41:17,520 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:17,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [690391742] [2022-03-19 10:41:17,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [690391742] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:17,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:17,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 10:41:17,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34318893] [2022-03-19 10:41:17,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:17,521 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 10:41:17,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:17,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 10:41:17,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-19 10:41:17,521 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 10:41:17,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:17,632 INFO L93 Difference]: Finished difference Result 133 states and 171 transitions. [2022-03-19 10:41:17,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 10:41:17,633 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2022-03-19 10:41:17,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:17,635 INFO L225 Difference]: With dead ends: 133 [2022-03-19 10:41:17,635 INFO L226 Difference]: Without dead ends: 96 [2022-03-19 10:41:17,637 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2022-03-19 10:41:17,637 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 41 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:17,638 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 138 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:41:17,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-19 10:41:17,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-03-19 10:41:17,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 70 states have (on average 1.2) internal successors, (84), 70 states have internal predecessors, (84), 18 states have call successors, (18), 9 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 10:41:17,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2022-03-19 10:41:17,662 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 59 [2022-03-19 10:41:17,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:17,663 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2022-03-19 10:41:17,663 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 10:41:17,663 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2022-03-19 10:41:17,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 10:41:17,664 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:17,664 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:17,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:17,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 10:41:17,871 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:17,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:17,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1402694082, now seen corresponding path program 3 times [2022-03-19 10:41:17,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:17,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1768865546] [2022-03-19 10:41:17,872 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:17,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1402694082, now seen corresponding path program 4 times [2022-03-19 10:41:17,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:17,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007396820] [2022-03-19 10:41:17,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:17,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:17,879 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:17,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1721491660] [2022-03-19 10:41:17,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:41:17,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:17,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:17,881 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:17,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 10:41:17,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:41:17,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:17,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 10:41:17,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:18,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 10:41:18,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:18,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007396820] [2022-03-19 10:41:18,252 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:18,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721491660] [2022-03-19 10:41:18,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721491660] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:18,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:18,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-19 10:41:18,253 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:18,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1768865546] [2022-03-19 10:41:18,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1768865546] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:18,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:18,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 10:41:18,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459405292] [2022-03-19 10:41:18,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:18,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 10:41:18,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:18,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 10:41:18,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-19 10:41:18,255 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 10:41:18,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:18,361 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2022-03-19 10:41:18,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 10:41:18,362 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 63 [2022-03-19 10:41:18,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:18,365 INFO L225 Difference]: With dead ends: 116 [2022-03-19 10:41:18,365 INFO L226 Difference]: Without dead ends: 111 [2022-03-19 10:41:18,365 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-03-19 10:41:18,366 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 34 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:18,366 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 184 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:41:18,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-19 10:41:18,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2022-03-19 10:41:18,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 78 states have internal predecessors, (91), 21 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 10:41:18,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 131 transitions. [2022-03-19 10:41:18,387 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 131 transitions. Word has length 63 [2022-03-19 10:41:18,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:18,387 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 131 transitions. [2022-03-19 10:41:18,387 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 10:41:18,387 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 131 transitions. [2022-03-19 10:41:18,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 10:41:18,388 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:18,388 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:18,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:18,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:18,595 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:18,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:18,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1823928061, now seen corresponding path program 5 times [2022-03-19 10:41:18,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:18,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [984676977] [2022-03-19 10:41:18,596 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:18,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1823928061, now seen corresponding path program 6 times [2022-03-19 10:41:18,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:18,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595903972] [2022-03-19 10:41:18,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:18,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:18,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:18,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [182225007] [2022-03-19 10:41:18,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:41:18,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:18,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:18,604 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:18,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 10:41:18,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-19 10:41:18,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:18,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 10:41:18,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:18,805 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 58 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:18,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 10:41:18,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:18,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595903972] [2022-03-19 10:41:18,984 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:18,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182225007] [2022-03-19 10:41:18,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182225007] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:18,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:18,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-19 10:41:18,984 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:18,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [984676977] [2022-03-19 10:41:18,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [984676977] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:18,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:18,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 10:41:18,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846068686] [2022-03-19 10:41:18,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:18,985 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 10:41:18,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:18,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 10:41:18,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-19 10:41:18,986 INFO L87 Difference]: Start difference. First operand 106 states and 131 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 10:41:19,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:19,097 INFO L93 Difference]: Finished difference Result 149 states and 191 transitions. [2022-03-19 10:41:19,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 10:41:19,097 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 65 [2022-03-19 10:41:19,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:19,098 INFO L225 Difference]: With dead ends: 149 [2022-03-19 10:41:19,098 INFO L226 Difference]: Without dead ends: 112 [2022-03-19 10:41:19,099 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-03-19 10:41:19,099 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 47 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:19,100 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 173 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:41:19,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-19 10:41:19,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-03-19 10:41:19,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 80 states have internal predecessors, (95), 21 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 10:41:19,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 135 transitions. [2022-03-19 10:41:19,117 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 135 transitions. Word has length 65 [2022-03-19 10:41:19,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:19,117 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 135 transitions. [2022-03-19 10:41:19,117 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 10:41:19,117 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 135 transitions. [2022-03-19 10:41:19,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 10:41:19,118 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:19,119 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:19,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:19,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-19 10:41:19,343 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:19,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:19,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1211810838, now seen corresponding path program 1 times [2022-03-19 10:41:19,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:19,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [967237202] [2022-03-19 10:41:19,344 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:19,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1211810838, now seen corresponding path program 2 times [2022-03-19 10:41:19,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:19,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251273650] [2022-03-19 10:41:19,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:19,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:19,351 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:19,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623322025] [2022-03-19 10:41:19,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:41:19,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:19,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:19,357 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:19,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 10:41:19,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:41:19,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:19,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 10:41:19,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:19,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 10:41:19,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:19,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251273650] [2022-03-19 10:41:19,729 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:19,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623322025] [2022-03-19 10:41:19,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623322025] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:19,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:19,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-19 10:41:19,730 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:19,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [967237202] [2022-03-19 10:41:19,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [967237202] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:19,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:19,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 10:41:19,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411218976] [2022-03-19 10:41:19,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:19,730 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 10:41:19,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:19,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 10:41:19,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-19 10:41:19,731 INFO L87 Difference]: Start difference. First operand 109 states and 135 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 10:41:19,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:19,839 INFO L93 Difference]: Finished difference Result 151 states and 194 transitions. [2022-03-19 10:41:19,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 10:41:19,839 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 67 [2022-03-19 10:41:19,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:19,840 INFO L225 Difference]: With dead ends: 151 [2022-03-19 10:41:19,840 INFO L226 Difference]: Without dead ends: 114 [2022-03-19 10:41:19,841 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=228, Unknown=0, NotChecked=0, Total=380 [2022-03-19 10:41:19,841 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 47 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:19,842 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 160 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:41:19,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-19 10:41:19,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-03-19 10:41:19,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 21 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 10:41:19,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 140 transitions. [2022-03-19 10:41:19,860 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 140 transitions. Word has length 67 [2022-03-19 10:41:19,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:19,861 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 140 transitions. [2022-03-19 10:41:19,861 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 10:41:19,861 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 140 transitions. [2022-03-19 10:41:19,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 10:41:19,862 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:19,862 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:19,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:20,085 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 10:41:20,085 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:20,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:20,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1645787183, now seen corresponding path program 5 times [2022-03-19 10:41:20,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:20,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [695217621] [2022-03-19 10:41:20,086 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:20,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1645787183, now seen corresponding path program 6 times [2022-03-19 10:41:20,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:20,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536448320] [2022-03-19 10:41:20,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:20,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:20,091 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:20,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478132487] [2022-03-19 10:41:20,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:41:20,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:20,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:20,093 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:20,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 10:41:20,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 10:41:20,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:20,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 10:41:20,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:20,301 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:20,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:20,491 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-19 10:41:20,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:20,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536448320] [2022-03-19 10:41:20,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:20,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478132487] [2022-03-19 10:41:20,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478132487] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:20,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:20,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-19 10:41:20,493 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:20,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [695217621] [2022-03-19 10:41:20,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [695217621] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:20,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:20,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 10:41:20,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999546231] [2022-03-19 10:41:20,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:20,494 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 10:41:20,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:20,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 10:41:20,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-19 10:41:20,494 INFO L87 Difference]: Start difference. First operand 114 states and 140 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 10:41:20,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:20,616 INFO L93 Difference]: Finished difference Result 137 states and 169 transitions. [2022-03-19 10:41:20,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 10:41:20,617 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 71 [2022-03-19 10:41:20,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:20,618 INFO L225 Difference]: With dead ends: 137 [2022-03-19 10:41:20,618 INFO L226 Difference]: Without dead ends: 132 [2022-03-19 10:41:20,618 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=250, Unknown=0, NotChecked=0, Total=420 [2022-03-19 10:41:20,619 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 63 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:20,619 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 192 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:41:20,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-19 10:41:20,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2022-03-19 10:41:20,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 93 states have internal predecessors, (107), 25 states have call successors, (25), 11 states have call predecessors, (25), 9 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-19 10:41:20,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 155 transitions. [2022-03-19 10:41:20,638 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 155 transitions. Word has length 71 [2022-03-19 10:41:20,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:20,638 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 155 transitions. [2022-03-19 10:41:20,638 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 10:41:20,638 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 155 transitions. [2022-03-19 10:41:20,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-19 10:41:20,639 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:20,639 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:20,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:20,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-19 10:41:20,844 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:20,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:20,844 INFO L85 PathProgramCache]: Analyzing trace with hash -15963768, now seen corresponding path program 1 times [2022-03-19 10:41:20,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:20,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [8362825] [2022-03-19 10:41:20,844 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:20,844 INFO L85 PathProgramCache]: Analyzing trace with hash -15963768, now seen corresponding path program 2 times [2022-03-19 10:41:20,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:20,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965627429] [2022-03-19 10:41:20,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:20,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:20,851 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:20,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662974333] [2022-03-19 10:41:20,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:41:20,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:20,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:20,853 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:20,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 10:41:20,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:41:20,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:20,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-19 10:41:20,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-03-19 10:41:21,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:41:21,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:21,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965627429] [2022-03-19 10:41:21,011 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:21,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662974333] [2022-03-19 10:41:21,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662974333] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:21,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:21,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 10:41:21,012 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:21,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [8362825] [2022-03-19 10:41:21,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [8362825] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:21,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:21,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 10:41:21,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751630928] [2022-03-19 10:41:21,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:21,012 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 10:41:21,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:21,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 10:41:21,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-19 10:41:21,013 INFO L87 Difference]: Start difference. First operand 125 states and 155 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-19 10:41:21,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:21,056 INFO L93 Difference]: Finished difference Result 180 states and 235 transitions. [2022-03-19 10:41:21,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 10:41:21,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 73 [2022-03-19 10:41:21,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:21,059 INFO L225 Difference]: With dead ends: 180 [2022-03-19 10:41:21,059 INFO L226 Difference]: Without dead ends: 143 [2022-03-19 10:41:21,059 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-19 10:41:21,060 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 12 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:21,060 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 138 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:41:21,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-19 10:41:21,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2022-03-19 10:41:21,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 99 states have (on average 1.202020202020202) internal successors, (119), 102 states have internal predecessors, (119), 28 states have call successors, (28), 11 states have call predecessors, (28), 9 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-19 10:41:21,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2022-03-19 10:41:21,083 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 73 [2022-03-19 10:41:21,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:21,083 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2022-03-19 10:41:21,083 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-19 10:41:21,083 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2022-03-19 10:41:21,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-19 10:41:21,084 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:21,084 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:21,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:21,295 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 10:41:21,295 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:21,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:21,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1401128268, now seen corresponding path program 7 times [2022-03-19 10:41:21,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:21,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1867609671] [2022-03-19 10:41:21,296 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:21,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1401128268, now seen corresponding path program 8 times [2022-03-19 10:41:21,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:21,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969818208] [2022-03-19 10:41:21,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:21,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:21,307 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:21,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747629379] [2022-03-19 10:41:21,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:41:21,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:21,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:21,309 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:21,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 10:41:21,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:41:21,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:21,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 10:41:21,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:21,523 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 14 proven. 92 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:21,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:21,695 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-19 10:41:21,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:21,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969818208] [2022-03-19 10:41:21,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:21,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747629379] [2022-03-19 10:41:21,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747629379] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:21,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:21,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-19 10:41:21,697 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:21,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1867609671] [2022-03-19 10:41:21,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1867609671] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:21,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:21,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 10:41:21,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223381547] [2022-03-19 10:41:21,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:21,697 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 10:41:21,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:21,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 10:41:21,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-19 10:41:21,698 INFO L87 Difference]: Start difference. First operand 137 states and 173 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 10:41:21,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:21,842 INFO L93 Difference]: Finished difference Result 193 states and 252 transitions. [2022-03-19 10:41:21,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 10:41:21,843 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 73 [2022-03-19 10:41:21,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:21,844 INFO L225 Difference]: With dead ends: 193 [2022-03-19 10:41:21,844 INFO L226 Difference]: Without dead ends: 144 [2022-03-19 10:41:21,844 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=277, Unknown=0, NotChecked=0, Total=462 [2022-03-19 10:41:21,845 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 57 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:21,845 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 193 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:41:21,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-19 10:41:21,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2022-03-19 10:41:21,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 102 states have (on average 1.2058823529411764) internal successors, (123), 104 states have internal predecessors, (123), 28 states have call successors, (28), 11 states have call predecessors, (28), 9 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-19 10:41:21,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 177 transitions. [2022-03-19 10:41:21,868 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 177 transitions. Word has length 73 [2022-03-19 10:41:21,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:21,868 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 177 transitions. [2022-03-19 10:41:21,868 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 10:41:21,868 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 177 transitions. [2022-03-19 10:41:21,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-19 10:41:21,869 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:21,869 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:21,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:22,083 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:22,083 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:22,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:22,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1116733197, now seen corresponding path program 1 times [2022-03-19 10:41:22,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:22,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [41008004] [2022-03-19 10:41:22,084 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:22,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1116733197, now seen corresponding path program 2 times [2022-03-19 10:41:22,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:22,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631192374] [2022-03-19 10:41:22,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:22,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:22,090 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:22,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1181175089] [2022-03-19 10:41:22,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:41:22,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:22,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:22,092 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:22,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 10:41:22,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:41:22,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:22,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 10:41:22,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 76 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:22,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:22,519 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-19 10:41:22,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:22,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631192374] [2022-03-19 10:41:22,520 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:22,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181175089] [2022-03-19 10:41:22,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181175089] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:22,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:22,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-19 10:41:22,520 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:22,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [41008004] [2022-03-19 10:41:22,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [41008004] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:22,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:22,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 10:41:22,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088126053] [2022-03-19 10:41:22,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:22,521 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 10:41:22,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:22,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 10:41:22,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-19 10:41:22,521 INFO L87 Difference]: Start difference. First operand 140 states and 177 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 10:41:22,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:22,659 INFO L93 Difference]: Finished difference Result 195 states and 255 transitions. [2022-03-19 10:41:22,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 10:41:22,659 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 75 [2022-03-19 10:41:22,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:22,660 INFO L225 Difference]: With dead ends: 195 [2022-03-19 10:41:22,660 INFO L226 Difference]: Without dead ends: 146 [2022-03-19 10:41:22,661 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=205, Invalid=301, Unknown=0, NotChecked=0, Total=506 [2022-03-19 10:41:22,662 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 66 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:22,662 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 176 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:41:22,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-19 10:41:22,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-03-19 10:41:22,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 108 states have (on average 1.1944444444444444) internal successors, (129), 108 states have internal predecessors, (129), 28 states have call successors, (28), 11 states have call predecessors, (28), 9 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-19 10:41:22,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 183 transitions. [2022-03-19 10:41:22,695 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 183 transitions. Word has length 75 [2022-03-19 10:41:22,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:22,695 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 183 transitions. [2022-03-19 10:41:22,695 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 10:41:22,695 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 183 transitions. [2022-03-19 10:41:22,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-19 10:41:22,696 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:22,696 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 5, 5, 5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:22,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:22,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:22,911 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:22,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:22,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1970775776, now seen corresponding path program 7 times [2022-03-19 10:41:22,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:22,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1308271425] [2022-03-19 10:41:22,912 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:22,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1970775776, now seen corresponding path program 8 times [2022-03-19 10:41:22,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:22,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280463033] [2022-03-19 10:41:22,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:22,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:22,919 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:22,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991602888] [2022-03-19 10:41:22,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:41:22,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:22,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:22,921 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:22,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 10:41:22,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:41:22,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:22,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 10:41:22,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:23,116 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 14 proven. 126 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:23,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-19 10:41:23,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:23,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280463033] [2022-03-19 10:41:23,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:23,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991602888] [2022-03-19 10:41:23,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991602888] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:23,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:23,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-19 10:41:23,342 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:23,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1308271425] [2022-03-19 10:41:23,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1308271425] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:23,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:23,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 10:41:23,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758958861] [2022-03-19 10:41:23,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:23,343 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 10:41:23,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:23,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 10:41:23,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-19 10:41:23,344 INFO L87 Difference]: Start difference. First operand 146 states and 183 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 10:41:23,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:23,518 INFO L93 Difference]: Finished difference Result 168 states and 210 transitions. [2022-03-19 10:41:23,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 10:41:23,518 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 79 [2022-03-19 10:41:23,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:23,519 INFO L225 Difference]: With dead ends: 168 [2022-03-19 10:41:23,519 INFO L226 Difference]: Without dead ends: 163 [2022-03-19 10:41:23,519 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=225, Invalid=327, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:41:23,520 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 68 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:23,520 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 233 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:41:23,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-19 10:41:23,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2022-03-19 10:41:23,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 114 states have (on average 1.1929824561403508) internal successors, (136), 117 states have internal predecessors, (136), 32 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-19 10:41:23,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 198 transitions. [2022-03-19 10:41:23,548 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 198 transitions. Word has length 79 [2022-03-19 10:41:23,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:23,549 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 198 transitions. [2022-03-19 10:41:23,549 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 10:41:23,549 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 198 transitions. [2022-03-19 10:41:23,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-19 10:41:23,550 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:23,550 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:23,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:23,773 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:23,773 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:23,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:23,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1693648491, now seen corresponding path program 1 times [2022-03-19 10:41:23,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:23,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1404608798] [2022-03-19 10:41:23,774 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:23,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1693648491, now seen corresponding path program 2 times [2022-03-19 10:41:23,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:23,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920105219] [2022-03-19 10:41:23,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:23,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:23,781 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:23,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677946491] [2022-03-19 10:41:23,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:41:23,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:23,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:23,782 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:23,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 10:41:23,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:41:23,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:23,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 10:41:23,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:23,986 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:23,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-19 10:41:24,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:24,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920105219] [2022-03-19 10:41:24,185 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:24,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677946491] [2022-03-19 10:41:24,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677946491] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:24,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:24,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-19 10:41:24,186 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:24,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1404608798] [2022-03-19 10:41:24,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1404608798] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:24,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:24,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 10:41:24,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437359190] [2022-03-19 10:41:24,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:24,187 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 10:41:24,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:24,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 10:41:24,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-19 10:41:24,187 INFO L87 Difference]: Start difference. First operand 157 states and 198 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 10:41:24,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:24,355 INFO L93 Difference]: Finished difference Result 213 states and 277 transitions. [2022-03-19 10:41:24,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 10:41:24,357 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 81 [2022-03-19 10:41:24,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:24,358 INFO L225 Difference]: With dead ends: 213 [2022-03-19 10:41:24,358 INFO L226 Difference]: Without dead ends: 164 [2022-03-19 10:41:24,359 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=243, Invalid=357, Unknown=0, NotChecked=0, Total=600 [2022-03-19 10:41:24,360 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 100 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:24,360 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 185 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:41:24,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-19 10:41:24,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2022-03-19 10:41:24,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 117 states have (on average 1.1965811965811965) internal successors, (140), 119 states have internal predecessors, (140), 32 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-19 10:41:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2022-03-19 10:41:24,389 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 81 [2022-03-19 10:41:24,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:24,389 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2022-03-19 10:41:24,390 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 10:41:24,390 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2022-03-19 10:41:24,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-19 10:41:24,391 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:24,391 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:24,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:24,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:24,611 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:24,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:24,612 INFO L85 PathProgramCache]: Analyzing trace with hash -918360272, now seen corresponding path program 3 times [2022-03-19 10:41:24,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:24,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [933689989] [2022-03-19 10:41:24,612 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:24,612 INFO L85 PathProgramCache]: Analyzing trace with hash -918360272, now seen corresponding path program 4 times [2022-03-19 10:41:24,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:24,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853526634] [2022-03-19 10:41:24,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:24,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:24,618 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:24,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388124421] [2022-03-19 10:41:24,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:41:24,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:24,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:24,619 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:24,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 10:41:24,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:41:24,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:24,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 10:41:24,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:24,881 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 22 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:24,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:25,085 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-19 10:41:25,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:25,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853526634] [2022-03-19 10:41:25,085 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:25,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388124421] [2022-03-19 10:41:25,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388124421] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:25,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:25,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-19 10:41:25,086 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:25,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [933689989] [2022-03-19 10:41:25,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [933689989] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:25,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:25,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 10:41:25,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266092359] [2022-03-19 10:41:25,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:25,086 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 10:41:25,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:25,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 10:41:25,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-19 10:41:25,087 INFO L87 Difference]: Start difference. First operand 160 states and 202 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 10:41:25,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:25,243 INFO L93 Difference]: Finished difference Result 215 states and 280 transitions. [2022-03-19 10:41:25,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 10:41:25,244 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 83 [2022-03-19 10:41:25,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:25,245 INFO L225 Difference]: With dead ends: 215 [2022-03-19 10:41:25,245 INFO L226 Difference]: Without dead ends: 166 [2022-03-19 10:41:25,245 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=266, Invalid=384, Unknown=0, NotChecked=0, Total=650 [2022-03-19 10:41:25,246 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 87 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:25,246 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 209 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:41:25,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-03-19 10:41:25,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-03-19 10:41:25,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 123 states have internal predecessors, (146), 32 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-19 10:41:25,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 208 transitions. [2022-03-19 10:41:25,272 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 208 transitions. Word has length 83 [2022-03-19 10:41:25,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:25,272 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 208 transitions. [2022-03-19 10:41:25,272 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 10:41:25,272 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 208 transitions. [2022-03-19 10:41:25,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-19 10:41:25,273 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:25,273 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:25,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-19 10:41:25,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:25,483 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:25,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:25,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1698627479, now seen corresponding path program 1 times [2022-03-19 10:41:25,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:25,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [303512759] [2022-03-19 10:41:25,484 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:25,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1698627479, now seen corresponding path program 2 times [2022-03-19 10:41:25,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:25,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489829746] [2022-03-19 10:41:25,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:25,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:25,489 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:25,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [504511873] [2022-03-19 10:41:25,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:41:25,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:25,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:25,499 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:25,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 10:41:25,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:41:25,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:25,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 10:41:25,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:25,716 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 16 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:25,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:25,929 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-19 10:41:25,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:25,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489829746] [2022-03-19 10:41:25,929 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:25,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504511873] [2022-03-19 10:41:25,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504511873] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:25,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:25,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-19 10:41:25,930 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:25,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [303512759] [2022-03-19 10:41:25,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [303512759] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:25,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:25,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 10:41:25,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620718497] [2022-03-19 10:41:25,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:25,930 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 10:41:25,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:25,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 10:41:25,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-19 10:41:25,931 INFO L87 Difference]: Start difference. First operand 166 states and 208 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-19 10:41:26,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:26,104 INFO L93 Difference]: Finished difference Result 188 states and 235 transitions. [2022-03-19 10:41:26,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 10:41:26,105 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 87 [2022-03-19 10:41:26,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:26,106 INFO L225 Difference]: With dead ends: 188 [2022-03-19 10:41:26,106 INFO L226 Difference]: Without dead ends: 183 [2022-03-19 10:41:26,106 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=288, Invalid=414, Unknown=0, NotChecked=0, Total=702 [2022-03-19 10:41:26,107 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 118 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:26,107 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 214 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:41:26,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-19 10:41:26,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 177. [2022-03-19 10:41:26,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 129 states have (on average 1.186046511627907) internal successors, (153), 132 states have internal predecessors, (153), 36 states have call successors, (36), 13 states have call predecessors, (36), 11 states have return successors, (34), 31 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-19 10:41:26,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 223 transitions. [2022-03-19 10:41:26,137 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 223 transitions. Word has length 87 [2022-03-19 10:41:26,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:26,137 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 223 transitions. [2022-03-19 10:41:26,137 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-19 10:41:26,137 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 223 transitions. [2022-03-19 10:41:26,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-19 10:41:26,138 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:26,138 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:26,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:26,355 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:26,355 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:26,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:26,356 INFO L85 PathProgramCache]: Analyzing trace with hash 2133755932, now seen corresponding path program 3 times [2022-03-19 10:41:26,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:26,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1959008291] [2022-03-19 10:41:26,358 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:26,358 INFO L85 PathProgramCache]: Analyzing trace with hash 2133755932, now seen corresponding path program 4 times [2022-03-19 10:41:26,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:26,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457457386] [2022-03-19 10:41:26,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:26,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:26,363 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:26,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1858616772] [2022-03-19 10:41:26,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:41:26,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:26,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:26,364 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:26,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 10:41:26,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:41:26,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:26,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 10:41:26,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:26,516 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-03-19 10:41:26,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-03-19 10:41:26,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:26,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457457386] [2022-03-19 10:41:26,640 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:26,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858616772] [2022-03-19 10:41:26,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858616772] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:26,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:26,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-03-19 10:41:26,641 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:26,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1959008291] [2022-03-19 10:41:26,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1959008291] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:26,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:26,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 10:41:26,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504779234] [2022-03-19 10:41:26,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:26,641 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 10:41:26,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:26,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 10:41:26,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 10:41:26,642 INFO L87 Difference]: Start difference. First operand 177 states and 223 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-19 10:41:26,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:26,721 INFO L93 Difference]: Finished difference Result 407 states and 543 transitions. [2022-03-19 10:41:26,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:41:26,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 89 [2022-03-19 10:41:26,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:26,723 INFO L225 Difference]: With dead ends: 407 [2022-03-19 10:41:26,723 INFO L226 Difference]: Without dead ends: 301 [2022-03-19 10:41:26,723 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 174 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:41:26,724 INFO L912 BasicCegarLoop]: 73 mSDtfsCounter, 13 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:26,724 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 167 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:41:26,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-03-19 10:41:26,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 296. [2022-03-19 10:41:26,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 219 states have (on average 1.2191780821917808) internal successors, (267), 225 states have internal predecessors, (267), 65 states have call successors, (65), 13 states have call predecessors, (65), 11 states have return successors, (63), 57 states have call predecessors, (63), 63 states have call successors, (63) [2022-03-19 10:41:26,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 395 transitions. [2022-03-19 10:41:26,791 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 395 transitions. Word has length 89 [2022-03-19 10:41:26,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:26,791 INFO L478 AbstractCegarLoop]: Abstraction has 296 states and 395 transitions. [2022-03-19 10:41:26,791 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-19 10:41:26,791 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 395 transitions. [2022-03-19 10:41:26,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-19 10:41:26,792 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:26,792 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:26,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:27,014 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-19 10:41:27,014 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:27,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:27,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1322512306, now seen corresponding path program 5 times [2022-03-19 10:41:27,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:27,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1778508593] [2022-03-19 10:41:27,015 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:27,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1322512306, now seen corresponding path program 6 times [2022-03-19 10:41:27,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:27,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249329004] [2022-03-19 10:41:27,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:27,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:27,022 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:27,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1411371254] [2022-03-19 10:41:27,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:41:27,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:27,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:27,024 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:27,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 10:41:27,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-19 10:41:27,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:27,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 10:41:27,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 16 proven. 152 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:27,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 16 proven. 40 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-19 10:41:27,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:27,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249329004] [2022-03-19 10:41:27,591 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:27,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411371254] [2022-03-19 10:41:27,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411371254] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:27,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:27,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-19 10:41:27,592 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:27,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1778508593] [2022-03-19 10:41:27,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1778508593] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:27,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:27,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 10:41:27,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92555949] [2022-03-19 10:41:27,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:27,592 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 10:41:27,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:27,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 10:41:27,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:41:27,594 INFO L87 Difference]: Start difference. First operand 296 states and 395 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-19 10:41:27,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:27,831 INFO L93 Difference]: Finished difference Result 362 states and 486 transitions. [2022-03-19 10:41:27,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 10:41:27,831 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 89 [2022-03-19 10:41:27,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:27,833 INFO L225 Difference]: With dead ends: 362 [2022-03-19 10:41:27,833 INFO L226 Difference]: Without dead ends: 357 [2022-03-19 10:41:27,834 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=359, Invalid=511, Unknown=0, NotChecked=0, Total=870 [2022-03-19 10:41:27,834 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 162 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:27,834 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 233 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:41:27,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-03-19 10:41:27,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 342. [2022-03-19 10:41:27,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 255 states have (on average 1.231372549019608) internal successors, (314), 261 states have internal predecessors, (314), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-19 10:41:27,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 460 transitions. [2022-03-19 10:41:27,888 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 460 transitions. Word has length 89 [2022-03-19 10:41:27,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:27,888 INFO L478 AbstractCegarLoop]: Abstraction has 342 states and 460 transitions. [2022-03-19 10:41:27,888 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-19 10:41:27,888 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 460 transitions. [2022-03-19 10:41:27,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-19 10:41:27,889 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:27,890 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:27,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-19 10:41:28,094 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-19 10:41:28,094 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:28,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:28,094 INFO L85 PathProgramCache]: Analyzing trace with hash -345961389, now seen corresponding path program 5 times [2022-03-19 10:41:28,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:28,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1991508325] [2022-03-19 10:41:28,095 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:28,095 INFO L85 PathProgramCache]: Analyzing trace with hash -345961389, now seen corresponding path program 6 times [2022-03-19 10:41:28,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:28,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415879457] [2022-03-19 10:41:28,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:28,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:28,102 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:28,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353408762] [2022-03-19 10:41:28,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:41:28,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:28,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:28,104 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:28,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 10:41:28,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-19 10:41:28,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:28,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 10:41:28,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 24 proven. 152 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:28,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-19 10:41:28,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:28,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415879457] [2022-03-19 10:41:28,630 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:28,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353408762] [2022-03-19 10:41:28,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353408762] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:28,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:28,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-19 10:41:28,630 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:28,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1991508325] [2022-03-19 10:41:28,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1991508325] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:28,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:28,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 10:41:28,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606138303] [2022-03-19 10:41:28,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:28,631 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 10:41:28,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:28,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 10:41:28,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-19 10:41:28,631 INFO L87 Difference]: Start difference. First operand 342 states and 460 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-19 10:41:28,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:28,826 INFO L93 Difference]: Finished difference Result 427 states and 585 transitions. [2022-03-19 10:41:28,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 10:41:28,826 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 91 [2022-03-19 10:41:28,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:28,828 INFO L225 Difference]: With dead ends: 427 [2022-03-19 10:41:28,828 INFO L226 Difference]: Without dead ends: 342 [2022-03-19 10:41:28,828 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=335, Invalid=477, Unknown=0, NotChecked=0, Total=812 [2022-03-19 10:41:28,829 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 93 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:28,829 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 218 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:41:28,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-03-19 10:41:28,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2022-03-19 10:41:28,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 255 states have (on average 1.2156862745098038) internal successors, (310), 261 states have internal predecessors, (310), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-19 10:41:28,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 456 transitions. [2022-03-19 10:41:28,891 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 456 transitions. Word has length 91 [2022-03-19 10:41:28,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:28,891 INFO L478 AbstractCegarLoop]: Abstraction has 342 states and 456 transitions. [2022-03-19 10:41:28,892 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-19 10:41:28,892 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 456 transitions. [2022-03-19 10:41:28,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-19 10:41:28,893 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:28,893 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:28,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:29,098 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-19 10:41:29,098 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:29,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:29,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1660747519, now seen corresponding path program 7 times [2022-03-19 10:41:29,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:29,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [324529419] [2022-03-19 10:41:29,099 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:29,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1660747519, now seen corresponding path program 8 times [2022-03-19 10:41:29,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:29,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700493623] [2022-03-19 10:41:29,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:29,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:29,104 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:29,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379201220] [2022-03-19 10:41:29,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:41:29,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:29,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:29,105 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:29,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 10:41:29,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:41:29,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:29,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 10:41:29,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:29,324 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:29,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-19 10:41:29,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:29,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700493623] [2022-03-19 10:41:29,609 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:29,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379201220] [2022-03-19 10:41:29,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379201220] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:29,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:29,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-19 10:41:29,610 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:29,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [324529419] [2022-03-19 10:41:29,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [324529419] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:29,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:29,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 10:41:29,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242369367] [2022-03-19 10:41:29,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:29,610 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 10:41:29,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:29,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 10:41:29,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:41:29,611 INFO L87 Difference]: Start difference. First operand 342 states and 456 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-19 10:41:29,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:29,848 INFO L93 Difference]: Finished difference Result 467 states and 640 transitions. [2022-03-19 10:41:29,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 10:41:29,849 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 97 [2022-03-19 10:41:29,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:29,851 INFO L225 Difference]: With dead ends: 467 [2022-03-19 10:41:29,851 INFO L226 Difference]: Without dead ends: 352 [2022-03-19 10:41:29,852 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=383, Invalid=547, Unknown=0, NotChecked=0, Total=930 [2022-03-19 10:41:29,853 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 118 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:29,853 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 238 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:41:29,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-03-19 10:41:29,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 344. [2022-03-19 10:41:29,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 257 states have (on average 1.2101167315175096) internal successors, (311), 261 states have internal predecessors, (311), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-19 10:41:29,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 457 transitions. [2022-03-19 10:41:29,923 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 457 transitions. Word has length 97 [2022-03-19 10:41:29,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:29,923 INFO L478 AbstractCegarLoop]: Abstraction has 344 states and 457 transitions. [2022-03-19 10:41:29,923 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-19 10:41:29,923 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 457 transitions. [2022-03-19 10:41:29,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-19 10:41:29,925 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:29,925 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:29,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:30,141 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-19 10:41:30,142 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:30,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:30,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1020733748, now seen corresponding path program 7 times [2022-03-19 10:41:30,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:30,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [423341985] [2022-03-19 10:41:30,143 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:30,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1020733748, now seen corresponding path program 8 times [2022-03-19 10:41:30,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:30,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678432636] [2022-03-19 10:41:30,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:30,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:30,148 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:30,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276782455] [2022-03-19 10:41:30,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:41:30,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:30,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:30,152 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:30,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 10:41:30,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:41:30,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:30,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-19 10:41:30,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-03-19 10:41:30,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:41:30,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:30,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678432636] [2022-03-19 10:41:30,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:30,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276782455] [2022-03-19 10:41:30,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276782455] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:30,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:30,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 10:41:30,343 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:30,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [423341985] [2022-03-19 10:41:30,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [423341985] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:30,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:30,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 10:41:30,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444991902] [2022-03-19 10:41:30,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:30,343 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 10:41:30,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:30,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 10:41:30,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-19 10:41:30,344 INFO L87 Difference]: Start difference. First operand 344 states and 457 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-19 10:41:30,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:30,434 INFO L93 Difference]: Finished difference Result 504 states and 675 transitions. [2022-03-19 10:41:30,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 10:41:30,434 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 99 [2022-03-19 10:41:30,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:30,436 INFO L225 Difference]: With dead ends: 504 [2022-03-19 10:41:30,436 INFO L226 Difference]: Without dead ends: 362 [2022-03-19 10:41:30,437 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-19 10:41:30,437 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 12 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:30,437 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:41:30,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-03-19 10:41:30,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 352. [2022-03-19 10:41:30,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 265 states have (on average 1.2150943396226415) internal successors, (322), 269 states have internal predecessors, (322), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-19 10:41:30,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 468 transitions. [2022-03-19 10:41:30,506 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 468 transitions. Word has length 99 [2022-03-19 10:41:30,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:30,506 INFO L478 AbstractCegarLoop]: Abstraction has 352 states and 468 transitions. [2022-03-19 10:41:30,506 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-19 10:41:30,507 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 468 transitions. [2022-03-19 10:41:30,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-19 10:41:30,508 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:30,508 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:30,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-19 10:41:30,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-19 10:41:30,723 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:30,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:30,724 INFO L85 PathProgramCache]: Analyzing trace with hash 359487094, now seen corresponding path program 9 times [2022-03-19 10:41:30,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:30,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [76171343] [2022-03-19 10:41:30,724 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:30,724 INFO L85 PathProgramCache]: Analyzing trace with hash 359487094, now seen corresponding path program 10 times [2022-03-19 10:41:30,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:30,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708199526] [2022-03-19 10:41:30,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:30,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:30,740 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:30,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713162087] [2022-03-19 10:41:30,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:41:30,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:30,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:30,744 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:30,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 10:41:30,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:41:30,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:30,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 10:41:30,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 26 proven. 202 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:31,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-19 10:41:31,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:31,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708199526] [2022-03-19 10:41:31,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:31,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713162087] [2022-03-19 10:41:31,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713162087] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:31,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:31,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-19 10:41:31,342 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:31,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [76171343] [2022-03-19 10:41:31,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [76171343] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:31,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:31,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 10:41:31,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094298287] [2022-03-19 10:41:31,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:31,343 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 10:41:31,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:31,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 10:41:31,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:41:31,343 INFO L87 Difference]: Start difference. First operand 352 states and 468 transitions. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 12 states have internal predecessors, (70), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-19 10:41:31,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:31,600 INFO L93 Difference]: Finished difference Result 471 states and 642 transitions. [2022-03-19 10:41:31,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 10:41:31,601 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 12 states have internal predecessors, (70), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 99 [2022-03-19 10:41:31,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:31,603 INFO L225 Difference]: With dead ends: 471 [2022-03-19 10:41:31,603 INFO L226 Difference]: Without dead ends: 364 [2022-03-19 10:41:31,604 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2022-03-19 10:41:31,604 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 133 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:31,604 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 219 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:41:31,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-03-19 10:41:31,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2022-03-19 10:41:31,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 277 states have (on average 1.2057761732851986) internal successors, (334), 277 states have internal predecessors, (334), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-19 10:41:31,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 480 transitions. [2022-03-19 10:41:31,682 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 480 transitions. Word has length 99 [2022-03-19 10:41:31,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:31,683 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 480 transitions. [2022-03-19 10:41:31,683 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 12 states have internal predecessors, (70), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-19 10:41:31,684 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 480 transitions. [2022-03-19 10:41:31,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-19 10:41:31,685 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:31,685 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:31,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:31,907 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:31,907 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:31,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:31,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1761003221, now seen corresponding path program 3 times [2022-03-19 10:41:31,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:31,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [178237287] [2022-03-19 10:41:31,908 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:31,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1761003221, now seen corresponding path program 4 times [2022-03-19 10:41:31,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:31,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025088252] [2022-03-19 10:41:31,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:31,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:31,915 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:31,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313034462] [2022-03-19 10:41:31,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:41:31,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:31,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:31,916 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:31,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-19 10:41:32,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:41:32,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:32,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 10:41:32,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:32,281 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:32,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-19 10:41:32,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:32,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025088252] [2022-03-19 10:41:32,581 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:32,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313034462] [2022-03-19 10:41:32,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313034462] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:32,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:32,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-03-19 10:41:32,581 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:32,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [178237287] [2022-03-19 10:41:32,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [178237287] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:32,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:32,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 10:41:32,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9252500] [2022-03-19 10:41:32,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:32,582 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 10:41:32,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:32,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 10:41:32,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:41:32,586 INFO L87 Difference]: Start difference. First operand 364 states and 480 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 13 states have internal predecessors, (72), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-19 10:41:32,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:32,824 INFO L93 Difference]: Finished difference Result 407 states and 538 transitions. [2022-03-19 10:41:32,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 10:41:32,824 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 13 states have internal predecessors, (72), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 103 [2022-03-19 10:41:32,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:32,826 INFO L225 Difference]: With dead ends: 407 [2022-03-19 10:41:32,826 INFO L226 Difference]: Without dead ends: 396 [2022-03-19 10:41:32,826 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=379, Invalid=551, Unknown=0, NotChecked=0, Total=930 [2022-03-19 10:41:32,827 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 117 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:32,827 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 273 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:41:32,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-03-19 10:41:32,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 377. [2022-03-19 10:41:32,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 281 states have (on average 1.206405693950178) internal successors, (339), 288 states have internal predecessors, (339), 82 states have call successors, (82), 15 states have call predecessors, (82), 13 states have return successors, (80), 73 states have call predecessors, (80), 80 states have call successors, (80) [2022-03-19 10:41:32,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 501 transitions. [2022-03-19 10:41:32,896 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 501 transitions. Word has length 103 [2022-03-19 10:41:32,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:32,897 INFO L478 AbstractCegarLoop]: Abstraction has 377 states and 501 transitions. [2022-03-19 10:41:32,897 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 13 states have internal predecessors, (72), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-19 10:41:32,897 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 501 transitions. [2022-03-19 10:41:32,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-19 10:41:32,898 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:32,898 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:32,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-19 10:41:33,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:33,107 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:33,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:33,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1733340336, now seen corresponding path program 9 times [2022-03-19 10:41:33,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:33,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [265148241] [2022-03-19 10:41:33,108 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:33,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1733340336, now seen corresponding path program 10 times [2022-03-19 10:41:33,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:33,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058183556] [2022-03-19 10:41:33,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:33,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:33,114 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:33,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [154724775] [2022-03-19 10:41:33,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:41:33,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:33,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:33,115 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:33,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-19 10:41:33,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:41:33,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:33,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 10:41:33,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 60 proven. 24 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-19 10:41:33,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 60 proven. 24 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-19 10:41:33,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:33,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058183556] [2022-03-19 10:41:33,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:33,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154724775] [2022-03-19 10:41:33,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154724775] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:33,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:33,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-19 10:41:33,526 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:33,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [265148241] [2022-03-19 10:41:33,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [265148241] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:33,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:33,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 10:41:33,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814393159] [2022-03-19 10:41:33,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:33,528 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 10:41:33,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:33,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 10:41:33,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-19 10:41:33,529 INFO L87 Difference]: Start difference. First operand 377 states and 501 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 6 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 10:41:33,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:33,779 INFO L93 Difference]: Finished difference Result 649 states and 907 transitions. [2022-03-19 10:41:33,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 10:41:33,780 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 6 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 105 [2022-03-19 10:41:33,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:33,783 INFO L225 Difference]: With dead ends: 649 [2022-03-19 10:41:33,783 INFO L226 Difference]: Without dead ends: 588 [2022-03-19 10:41:33,784 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-19 10:41:33,785 INFO L912 BasicCegarLoop]: 94 mSDtfsCounter, 38 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:33,785 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 344 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:41:33,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-03-19 10:41:33,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 504. [2022-03-19 10:41:33,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 376 states have (on average 1.247340425531915) internal successors, (469), 386 states have internal predecessors, (469), 114 states have call successors, (114), 15 states have call predecessors, (114), 13 states have return successors, (112), 102 states have call predecessors, (112), 112 states have call successors, (112) [2022-03-19 10:41:33,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 695 transitions. [2022-03-19 10:41:33,908 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 695 transitions. Word has length 105 [2022-03-19 10:41:33,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:33,909 INFO L478 AbstractCegarLoop]: Abstraction has 504 states and 695 transitions. [2022-03-19 10:41:33,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 6 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 10:41:33,909 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 695 transitions. [2022-03-19 10:41:33,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-19 10:41:33,911 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:33,911 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:33,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-19 10:41:34,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:34,127 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:34,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:34,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1666981150, now seen corresponding path program 11 times [2022-03-19 10:41:34,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:34,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [255623748] [2022-03-19 10:41:34,128 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:34,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1666981150, now seen corresponding path program 12 times [2022-03-19 10:41:34,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:34,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957849751] [2022-03-19 10:41:34,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:34,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:34,133 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:34,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [18444494] [2022-03-19 10:41:34,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:41:34,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:34,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:34,135 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:34,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-19 10:41:34,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 10:41:34,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:34,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 10:41:34,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 24 proven. 242 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:34,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 24 proven. 62 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-19 10:41:34,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:34,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957849751] [2022-03-19 10:41:34,781 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:34,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18444494] [2022-03-19 10:41:34,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18444494] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:34,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:34,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-03-19 10:41:34,781 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:34,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [255623748] [2022-03-19 10:41:34,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [255623748] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:34,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:34,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 10:41:34,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697187523] [2022-03-19 10:41:34,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:34,781 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 10:41:34,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:34,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 10:41:34,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:41:34,782 INFO L87 Difference]: Start difference. First operand 504 states and 695 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-19 10:41:35,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:35,051 INFO L93 Difference]: Finished difference Result 753 states and 1073 transitions. [2022-03-19 10:41:35,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 10:41:35,052 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 105 [2022-03-19 10:41:35,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:35,054 INFO L225 Difference]: With dead ends: 753 [2022-03-19 10:41:35,054 INFO L226 Difference]: Without dead ends: 532 [2022-03-19 10:41:35,055 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=404, Invalid=588, Unknown=0, NotChecked=0, Total=992 [2022-03-19 10:41:35,055 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 152 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:35,056 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 238 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:41:35,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-03-19 10:41:35,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 522. [2022-03-19 10:41:35,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 394 states have (on average 1.2461928934010151) internal successors, (491), 398 states have internal predecessors, (491), 114 states have call successors, (114), 15 states have call predecessors, (114), 13 states have return successors, (112), 108 states have call predecessors, (112), 112 states have call successors, (112) [2022-03-19 10:41:35,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 717 transitions. [2022-03-19 10:41:35,189 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 717 transitions. Word has length 105 [2022-03-19 10:41:35,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:35,189 INFO L478 AbstractCegarLoop]: Abstraction has 522 states and 717 transitions. [2022-03-19 10:41:35,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-19 10:41:35,189 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 717 transitions. [2022-03-19 10:41:35,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-19 10:41:35,191 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:35,191 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 7, 6, 6, 6, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:35,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-19 10:41:35,414 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-03-19 10:41:35,414 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:35,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:35,414 INFO L85 PathProgramCache]: Analyzing trace with hash -2132095591, now seen corresponding path program 11 times [2022-03-19 10:41:35,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:35,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1634618120] [2022-03-19 10:41:35,415 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:35,415 INFO L85 PathProgramCache]: Analyzing trace with hash -2132095591, now seen corresponding path program 12 times [2022-03-19 10:41:35,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:35,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918699838] [2022-03-19 10:41:35,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:35,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:35,419 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:35,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360811004] [2022-03-19 10:41:35,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:41:35,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:35,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:35,420 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:35,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-19 10:41:35,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 10:41:35,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:35,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 10:41:35,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 28 proven. 260 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:35,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:35,986 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 28 proven. 80 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-19 10:41:35,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:35,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918699838] [2022-03-19 10:41:35,987 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:35,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360811004] [2022-03-19 10:41:35,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360811004] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:35,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:35,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-03-19 10:41:35,987 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:35,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1634618120] [2022-03-19 10:41:35,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1634618120] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:35,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:35,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 10:41:35,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674301877] [2022-03-19 10:41:35,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:35,988 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 10:41:35,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:35,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 10:41:35,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:41:35,989 INFO L87 Difference]: Start difference. First operand 522 states and 717 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-19 10:41:36,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:36,275 INFO L93 Difference]: Finished difference Result 735 states and 1041 transitions. [2022-03-19 10:41:36,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 10:41:36,275 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 107 [2022-03-19 10:41:36,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:36,277 INFO L225 Difference]: With dead ends: 735 [2022-03-19 10:41:36,277 INFO L226 Difference]: Without dead ends: 538 [2022-03-19 10:41:36,278 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=434, Invalid=622, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 10:41:36,278 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 140 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:36,279 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 240 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:41:36,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-03-19 10:41:36,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2022-03-19 10:41:36,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 410 states have (on average 1.2365853658536585) internal successors, (507), 410 states have internal predecessors, (507), 114 states have call successors, (114), 15 states have call predecessors, (114), 13 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2022-03-19 10:41:36,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 733 transitions. [2022-03-19 10:41:36,419 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 733 transitions. Word has length 107 [2022-03-19 10:41:36,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:36,419 INFO L478 AbstractCegarLoop]: Abstraction has 538 states and 733 transitions. [2022-03-19 10:41:36,419 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-19 10:41:36,419 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 733 transitions. [2022-03-19 10:41:36,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-19 10:41:36,421 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:36,421 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:36,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:36,625 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:36,626 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:36,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:36,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1965005106, now seen corresponding path program 5 times [2022-03-19 10:41:36,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:36,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1817376527] [2022-03-19 10:41:36,627 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:36,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1965005106, now seen corresponding path program 6 times [2022-03-19 10:41:36,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:36,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574665322] [2022-03-19 10:41:36,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:36,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:36,631 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:36,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501841343] [2022-03-19 10:41:36,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:41:36,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:36,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:36,633 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:36,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-19 10:41:36,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 10:41:36,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:36,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 10:41:36,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:37,038 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 22 proven. 292 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:37,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:37,333 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 22 proven. 72 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-19 10:41:37,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:37,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574665322] [2022-03-19 10:41:37,334 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:37,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501841343] [2022-03-19 10:41:37,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501841343] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:37,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:37,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2022-03-19 10:41:37,334 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:37,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1817376527] [2022-03-19 10:41:37,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1817376527] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:37,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:37,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 10:41:37,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144667303] [2022-03-19 10:41:37,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:37,335 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 10:41:37,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:37,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 10:41:37,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:41:37,336 INFO L87 Difference]: Start difference. First operand 538 states and 733 transitions. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 14 states have internal predecessors, (78), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 10:41:37,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:37,709 INFO L93 Difference]: Finished difference Result 593 states and 810 transitions. [2022-03-19 10:41:37,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 10:41:37,710 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 14 states have internal predecessors, (78), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) Word has length 111 [2022-03-19 10:41:37,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:37,712 INFO L225 Difference]: With dead ends: 593 [2022-03-19 10:41:37,712 INFO L226 Difference]: Without dead ends: 582 [2022-03-19 10:41:37,713 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=399, Invalid=593, Unknown=0, NotChecked=0, Total=992 [2022-03-19 10:41:37,713 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 172 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:37,714 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 266 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:41:37,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-03-19 10:41:37,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 560. [2022-03-19 10:41:37,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 418 states have (on average 1.2344497607655502) internal successors, (516), 428 states have internal predecessors, (516), 127 states have call successors, (127), 16 states have call predecessors, (127), 14 states have return successors, (125), 115 states have call predecessors, (125), 125 states have call successors, (125) [2022-03-19 10:41:37,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 768 transitions. [2022-03-19 10:41:37,852 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 768 transitions. Word has length 111 [2022-03-19 10:41:37,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:37,852 INFO L478 AbstractCegarLoop]: Abstraction has 560 states and 768 transitions. [2022-03-19 10:41:37,852 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 14 states have internal predecessors, (78), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 10:41:37,852 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 768 transitions. [2022-03-19 10:41:37,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-19 10:41:37,854 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:37,854 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:37,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:38,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-19 10:41:38,059 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:38,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:38,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1038942829, now seen corresponding path program 13 times [2022-03-19 10:41:38,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:38,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1619008184] [2022-03-19 10:41:38,060 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:38,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1038942829, now seen corresponding path program 14 times [2022-03-19 10:41:38,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:38,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817390804] [2022-03-19 10:41:38,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:38,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:38,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:38,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034924839] [2022-03-19 10:41:38,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:41:38,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:38,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:38,068 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:38,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-19 10:41:38,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:41:38,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:38,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 10:41:38,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 46 proven. 56 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-19 10:41:38,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 34 proven. 68 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-19 10:41:38,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:38,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817390804] [2022-03-19 10:41:38,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:38,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034924839] [2022-03-19 10:41:38,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034924839] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:38,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:38,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 10:41:38,552 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:38,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1619008184] [2022-03-19 10:41:38,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1619008184] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:38,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:38,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 10:41:38,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325076747] [2022-03-19 10:41:38,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:38,553 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 10:41:38,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:38,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 10:41:38,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-19 10:41:38,554 INFO L87 Difference]: Start difference. First operand 560 states and 768 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 8 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-19 10:41:38,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:38,848 INFO L93 Difference]: Finished difference Result 862 states and 1224 transitions. [2022-03-19 10:41:38,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 10:41:38,848 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 8 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 113 [2022-03-19 10:41:38,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:38,850 INFO L225 Difference]: With dead ends: 862 [2022-03-19 10:41:38,850 INFO L226 Difference]: Without dead ends: 711 [2022-03-19 10:41:38,851 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2022-03-19 10:41:38,851 INFO L912 BasicCegarLoop]: 106 mSDtfsCounter, 76 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:38,852 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 435 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:41:38,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-03-19 10:41:38,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 560. [2022-03-19 10:41:38,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 418 states have (on average 1.2344497607655502) internal successors, (516), 428 states have internal predecessors, (516), 127 states have call successors, (127), 16 states have call predecessors, (127), 14 states have return successors, (125), 115 states have call predecessors, (125), 125 states have call successors, (125) [2022-03-19 10:41:38,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 768 transitions. [2022-03-19 10:41:38,989 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 768 transitions. Word has length 113 [2022-03-19 10:41:38,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:38,990 INFO L478 AbstractCegarLoop]: Abstraction has 560 states and 768 transitions. [2022-03-19 10:41:38,990 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 8 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-19 10:41:38,990 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 768 transitions. [2022-03-19 10:41:38,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-19 10:41:38,991 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:38,991 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:39,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:39,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:39,207 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:39,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:39,208 INFO L85 PathProgramCache]: Analyzing trace with hash -144297019, now seen corresponding path program 15 times [2022-03-19 10:41:39,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:39,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1464534928] [2022-03-19 10:41:39,208 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:39,208 INFO L85 PathProgramCache]: Analyzing trace with hash -144297019, now seen corresponding path program 16 times [2022-03-19 10:41:39,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:39,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993896685] [2022-03-19 10:41:39,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:39,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:39,213 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:39,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1278309338] [2022-03-19 10:41:39,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:41:39,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:39,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:39,214 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:39,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-19 10:41:39,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:41:39,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:39,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 10:41:39,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 26 proven. 302 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:39,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 26 proven. 82 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-19 10:41:40,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:40,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993896685] [2022-03-19 10:41:40,162 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:40,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278309338] [2022-03-19 10:41:40,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278309338] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:40,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:40,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2022-03-19 10:41:40,162 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:40,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1464534928] [2022-03-19 10:41:40,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1464534928] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:40,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:40,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 10:41:40,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604652326] [2022-03-19 10:41:40,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:40,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 10:41:40,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:40,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 10:41:40,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:41:40,164 INFO L87 Difference]: Start difference. First operand 560 states and 768 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 14 states have internal predecessors, (80), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 10:41:40,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:40,549 INFO L93 Difference]: Finished difference Result 781 states and 1101 transitions. [2022-03-19 10:41:40,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 10:41:40,549 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 14 states have internal predecessors, (80), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) Word has length 113 [2022-03-19 10:41:40,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:40,552 INFO L225 Difference]: With dead ends: 781 [2022-03-19 10:41:40,552 INFO L226 Difference]: Without dead ends: 588 [2022-03-19 10:41:40,552 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=425, Invalid=631, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 10:41:40,553 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 180 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:40,553 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 262 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:41:40,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-03-19 10:41:40,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 578. [2022-03-19 10:41:40,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 436 states have (on average 1.2339449541284404) internal successors, (538), 440 states have internal predecessors, (538), 127 states have call successors, (127), 16 states have call predecessors, (127), 14 states have return successors, (125), 121 states have call predecessors, (125), 125 states have call successors, (125) [2022-03-19 10:41:40,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 790 transitions. [2022-03-19 10:41:40,718 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 790 transitions. Word has length 113 [2022-03-19 10:41:40,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:40,718 INFO L478 AbstractCegarLoop]: Abstraction has 578 states and 790 transitions. [2022-03-19 10:41:40,718 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 14 states have internal predecessors, (80), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 10:41:40,719 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 790 transitions. [2022-03-19 10:41:40,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-19 10:41:40,720 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:40,720 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:40,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-19 10:41:40,925 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-19 10:41:40,926 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:40,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:40,926 INFO L85 PathProgramCache]: Analyzing trace with hash 533963976, now seen corresponding path program 13 times [2022-03-19 10:41:40,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:40,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1640387010] [2022-03-19 10:41:40,926 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:40,926 INFO L85 PathProgramCache]: Analyzing trace with hash 533963976, now seen corresponding path program 14 times [2022-03-19 10:41:40,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:40,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263323359] [2022-03-19 10:41:40,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:40,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:40,933 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:40,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2086551373] [2022-03-19 10:41:40,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:41:40,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:40,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:40,935 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:40,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-19 10:41:41,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:41:41,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:41,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 10:41:41,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:41,251 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 36 proven. 288 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:41,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 36 proven. 68 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-19 10:41:41,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:41,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263323359] [2022-03-19 10:41:41,504 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:41,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086551373] [2022-03-19 10:41:41,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086551373] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:41,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:41,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2022-03-19 10:41:41,505 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:41,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1640387010] [2022-03-19 10:41:41,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1640387010] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:41,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:41,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 10:41:41,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101394729] [2022-03-19 10:41:41,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:41,505 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 10:41:41,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:41,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 10:41:41,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:41:41,506 INFO L87 Difference]: Start difference. First operand 578 states and 790 transitions. Second operand has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 10:41:41,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:41,869 INFO L93 Difference]: Finished difference Result 791 states and 1114 transitions. [2022-03-19 10:41:41,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 10:41:41,870 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) Word has length 115 [2022-03-19 10:41:41,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:41,872 INFO L225 Difference]: With dead ends: 791 [2022-03-19 10:41:41,872 INFO L226 Difference]: Without dead ends: 594 [2022-03-19 10:41:41,873 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 206 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=456, Invalid=666, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 10:41:41,873 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 138 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:41,874 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 286 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:41:41,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-03-19 10:41:42,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 594. [2022-03-19 10:41:42,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 452 states have (on average 1.2256637168141593) internal successors, (554), 452 states have internal predecessors, (554), 127 states have call successors, (127), 16 states have call predecessors, (127), 14 states have return successors, (125), 125 states have call predecessors, (125), 125 states have call successors, (125) [2022-03-19 10:41:42,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 806 transitions. [2022-03-19 10:41:42,012 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 806 transitions. Word has length 115 [2022-03-19 10:41:42,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:42,013 INFO L478 AbstractCegarLoop]: Abstraction has 594 states and 806 transitions. [2022-03-19 10:41:42,013 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 10:41:42,013 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 806 transitions. [2022-03-19 10:41:42,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-19 10:41:42,015 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:42,015 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 6, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:42,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:42,219 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-19 10:41:42,219 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:42,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:42,220 INFO L85 PathProgramCache]: Analyzing trace with hash 650985841, now seen corresponding path program 7 times [2022-03-19 10:41:42,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:42,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1261066811] [2022-03-19 10:41:42,220 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:42,220 INFO L85 PathProgramCache]: Analyzing trace with hash 650985841, now seen corresponding path program 8 times [2022-03-19 10:41:42,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:42,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362229274] [2022-03-19 10:41:42,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:42,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:42,225 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:42,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560399372] [2022-03-19 10:41:42,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:41:42,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:42,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:42,226 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:42,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-19 10:41:42,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:41:42,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:42,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 10:41:42,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 24 proven. 356 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:42,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:42,775 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 24 proven. 92 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-19 10:41:42,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:42,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362229274] [2022-03-19 10:41:42,775 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:42,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560399372] [2022-03-19 10:41:42,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560399372] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:42,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:42,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2022-03-19 10:41:42,776 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:42,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1261066811] [2022-03-19 10:41:42,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1261066811] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:42,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:42,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 10:41:42,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250946578] [2022-03-19 10:41:42,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:42,776 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 10:41:42,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:42,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 10:41:42,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:41:42,777 INFO L87 Difference]: Start difference. First operand 594 states and 806 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 15 states have internal predecessors, (84), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-19 10:41:43,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:43,193 INFO L93 Difference]: Finished difference Result 649 states and 883 transitions. [2022-03-19 10:41:43,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 10:41:43,194 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 15 states have internal predecessors, (84), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) Word has length 119 [2022-03-19 10:41:43,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:43,197 INFO L225 Difference]: With dead ends: 649 [2022-03-19 10:41:43,197 INFO L226 Difference]: Without dead ends: 638 [2022-03-19 10:41:43,198 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=419, Invalid=637, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 10:41:43,198 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 243 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:43,199 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 279 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:41:43,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-03-19 10:41:43,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 616. [2022-03-19 10:41:43,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 460 states have (on average 1.2239130434782608) internal successors, (563), 470 states have internal predecessors, (563), 140 states have call successors, (140), 17 states have call predecessors, (140), 15 states have return successors, (138), 128 states have call predecessors, (138), 138 states have call successors, (138) [2022-03-19 10:41:43,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 841 transitions. [2022-03-19 10:41:43,372 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 841 transitions. Word has length 119 [2022-03-19 10:41:43,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:43,372 INFO L478 AbstractCegarLoop]: Abstraction has 616 states and 841 transitions. [2022-03-19 10:41:43,372 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 15 states have internal predecessors, (84), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-19 10:41:43,372 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 841 transitions. [2022-03-19 10:41:43,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-19 10:41:43,374 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:43,374 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 7, 7, 7, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:43,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:43,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-19 10:41:43,587 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:43,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:43,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1267134888, now seen corresponding path program 17 times [2022-03-19 10:41:43,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:43,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1636722558] [2022-03-19 10:41:43,588 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:43,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1267134888, now seen corresponding path program 18 times [2022-03-19 10:41:43,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:43,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799878812] [2022-03-19 10:41:43,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:43,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:43,594 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:43,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617584655] [2022-03-19 10:41:43,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:41:43,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:43,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:43,595 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:43,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-19 10:41:44,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-19 10:41:44,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:44,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 10:41:44,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:44,379 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 28 proven. 370 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:44,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:44,641 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 28 proven. 106 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-19 10:41:44,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:44,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799878812] [2022-03-19 10:41:44,642 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:44,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617584655] [2022-03-19 10:41:44,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617584655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:44,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:44,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2022-03-19 10:41:44,642 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:44,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1636722558] [2022-03-19 10:41:44,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1636722558] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:44,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:44,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 10:41:44,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693860563] [2022-03-19 10:41:44,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:44,643 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 10:41:44,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:44,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 10:41:44,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:41:44,643 INFO L87 Difference]: Start difference. First operand 616 states and 841 transitions. Second operand has 16 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-19 10:41:45,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:45,104 INFO L93 Difference]: Finished difference Result 837 states and 1174 transitions. [2022-03-19 10:41:45,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 10:41:45,104 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) Word has length 121 [2022-03-19 10:41:45,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:45,107 INFO L225 Difference]: With dead ends: 837 [2022-03-19 10:41:45,107 INFO L226 Difference]: Without dead ends: 644 [2022-03-19 10:41:45,110 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=446, Invalid=676, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 10:41:45,110 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 224 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:45,111 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 271 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:41:45,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-03-19 10:41:45,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 634. [2022-03-19 10:41:45,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 478 states have (on average 1.2238493723849373) internal successors, (585), 482 states have internal predecessors, (585), 140 states have call successors, (140), 17 states have call predecessors, (140), 15 states have return successors, (138), 134 states have call predecessors, (138), 138 states have call successors, (138) [2022-03-19 10:41:45,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 863 transitions. [2022-03-19 10:41:45,289 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 863 transitions. Word has length 121 [2022-03-19 10:41:45,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:45,289 INFO L478 AbstractCegarLoop]: Abstraction has 634 states and 863 transitions. [2022-03-19 10:41:45,289 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-19 10:41:45,289 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 863 transitions. [2022-03-19 10:41:45,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-19 10:41:45,291 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:45,291 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:45,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:45,496 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-19 10:41:45,497 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:45,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:45,497 INFO L85 PathProgramCache]: Analyzing trace with hash 487500267, now seen corresponding path program 15 times [2022-03-19 10:41:45,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:45,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1700380335] [2022-03-19 10:41:45,498 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:45,498 INFO L85 PathProgramCache]: Analyzing trace with hash 487500267, now seen corresponding path program 16 times [2022-03-19 10:41:45,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:45,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074770834] [2022-03-19 10:41:45,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:45,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:45,502 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:45,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [135843474] [2022-03-19 10:41:45,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:41:45,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:45,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:45,504 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:45,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-19 10:41:45,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:41:45,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:45,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 10:41:45,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 38 proven. 350 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:45,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:46,169 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 38 proven. 86 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-19 10:41:46,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:46,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074770834] [2022-03-19 10:41:46,169 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:46,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135843474] [2022-03-19 10:41:46,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135843474] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:46,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:46,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2022-03-19 10:41:46,170 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:46,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1700380335] [2022-03-19 10:41:46,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1700380335] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:46,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:46,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 10:41:46,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974780803] [2022-03-19 10:41:46,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:46,170 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 10:41:46,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:46,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 10:41:46,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:41:46,171 INFO L87 Difference]: Start difference. First operand 634 states and 863 transitions. Second operand has 16 states, 16 states have (on average 5.5) internal successors, (88), 15 states have internal predecessors, (88), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-19 10:41:46,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:46,578 INFO L93 Difference]: Finished difference Result 847 states and 1187 transitions. [2022-03-19 10:41:46,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 10:41:46,579 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.5) internal successors, (88), 15 states have internal predecessors, (88), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) Word has length 123 [2022-03-19 10:41:46,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:46,582 INFO L225 Difference]: With dead ends: 847 [2022-03-19 10:41:46,582 INFO L226 Difference]: Without dead ends: 650 [2022-03-19 10:41:46,583 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=478, Invalid=712, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 10:41:46,583 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 173 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:46,583 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 292 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:41:46,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-03-19 10:41:46,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 650. [2022-03-19 10:41:46,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 494 states have (on average 1.2165991902834008) internal successors, (601), 494 states have internal predecessors, (601), 140 states have call successors, (140), 17 states have call predecessors, (140), 15 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2022-03-19 10:41:46,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 879 transitions. [2022-03-19 10:41:46,772 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 879 transitions. Word has length 123 [2022-03-19 10:41:46,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:46,773 INFO L478 AbstractCegarLoop]: Abstraction has 650 states and 879 transitions. [2022-03-19 10:41:46,773 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5) internal successors, (88), 15 states have internal predecessors, (88), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-19 10:41:46,773 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 879 transitions. [2022-03-19 10:41:46,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-19 10:41:46,774 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:46,775 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 7, 7, 7, 7, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:46,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:46,994 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:46,994 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:46,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:46,995 INFO L85 PathProgramCache]: Analyzing trace with hash -992818924, now seen corresponding path program 9 times [2022-03-19 10:41:46,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:46,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2003501294] [2022-03-19 10:41:46,995 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:46,995 INFO L85 PathProgramCache]: Analyzing trace with hash -992818924, now seen corresponding path program 10 times [2022-03-19 10:41:46,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:46,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15364716] [2022-03-19 10:41:46,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:46,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:47,001 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:47,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [527025769] [2022-03-19 10:41:47,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:41:47,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:47,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:47,003 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:47,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-19 10:41:47,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:41:47,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:47,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 10:41:47,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 26 proven. 428 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:47,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:47,605 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 26 proven. 116 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-19 10:41:47,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:47,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15364716] [2022-03-19 10:41:47,605 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:47,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527025769] [2022-03-19 10:41:47,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527025769] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:47,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:47,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-03-19 10:41:47,605 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:47,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2003501294] [2022-03-19 10:41:47,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2003501294] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:47,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:47,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 10:41:47,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331159753] [2022-03-19 10:41:47,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:47,606 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 10:41:47,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:47,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 10:41:47,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:41:47,607 INFO L87 Difference]: Start difference. First operand 650 states and 879 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 16 states have internal predecessors, (90), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-19 10:41:48,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:48,075 INFO L93 Difference]: Finished difference Result 705 states and 956 transitions. [2022-03-19 10:41:48,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 10:41:48,075 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 16 states have internal predecessors, (90), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) Word has length 127 [2022-03-19 10:41:48,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:48,077 INFO L225 Difference]: With dead ends: 705 [2022-03-19 10:41:48,077 INFO L226 Difference]: Without dead ends: 694 [2022-03-19 10:41:48,078 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=439, Invalid=683, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 10:41:48,079 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 212 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:48,079 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 297 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:41:48,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-03-19 10:41:48,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 672. [2022-03-19 10:41:48,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 502 states have (on average 1.2151394422310757) internal successors, (610), 512 states have internal predecessors, (610), 153 states have call successors, (153), 18 states have call predecessors, (153), 16 states have return successors, (151), 141 states have call predecessors, (151), 151 states have call successors, (151) [2022-03-19 10:41:48,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 914 transitions. [2022-03-19 10:41:48,224 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 914 transitions. Word has length 127 [2022-03-19 10:41:48,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:48,224 INFO L478 AbstractCegarLoop]: Abstraction has 672 states and 914 transitions. [2022-03-19 10:41:48,225 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 16 states have internal predecessors, (90), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-19 10:41:48,225 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 914 transitions. [2022-03-19 10:41:48,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-19 10:41:48,227 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:48,227 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:48,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:48,449 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:48,449 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:48,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:48,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1410231607, now seen corresponding path program 19 times [2022-03-19 10:41:48,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:48,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2085470431] [2022-03-19 10:41:48,450 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:48,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1410231607, now seen corresponding path program 20 times [2022-03-19 10:41:48,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:48,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489680665] [2022-03-19 10:41:48,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:48,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:48,455 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:48,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290767370] [2022-03-19 10:41:48,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:41:48,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:48,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:48,458 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:48,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-19 10:41:48,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:41:48,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:48,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 10:41:48,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:48,766 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 32 proven. 416 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:48,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 32 proven. 104 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-19 10:41:49,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:49,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489680665] [2022-03-19 10:41:49,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:49,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290767370] [2022-03-19 10:41:49,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290767370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:49,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:49,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-03-19 10:41:49,042 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:49,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2085470431] [2022-03-19 10:41:49,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2085470431] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:49,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:49,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 10:41:49,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413452071] [2022-03-19 10:41:49,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:49,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 10:41:49,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:49,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 10:41:49,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:41:49,043 INFO L87 Difference]: Start difference. First operand 672 states and 914 transitions. Second operand has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 16 states have internal predecessors, (92), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-19 10:41:49,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:49,448 INFO L93 Difference]: Finished difference Result 893 states and 1247 transitions. [2022-03-19 10:41:49,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 10:41:49,448 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 16 states have internal predecessors, (92), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) Word has length 129 [2022-03-19 10:41:49,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:49,451 INFO L225 Difference]: With dead ends: 893 [2022-03-19 10:41:49,451 INFO L226 Difference]: Without dead ends: 700 [2022-03-19 10:41:49,452 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=467, Invalid=723, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 10:41:49,453 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 185 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:49,453 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 322 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:41:49,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-03-19 10:41:49,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 690. [2022-03-19 10:41:49,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 520 states have (on average 1.2153846153846153) internal successors, (632), 524 states have internal predecessors, (632), 153 states have call successors, (153), 18 states have call predecessors, (153), 16 states have return successors, (151), 147 states have call predecessors, (151), 151 states have call successors, (151) [2022-03-19 10:41:49,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 936 transitions. [2022-03-19 10:41:49,649 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 936 transitions. Word has length 129 [2022-03-19 10:41:49,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:49,649 INFO L478 AbstractCegarLoop]: Abstraction has 690 states and 936 transitions. [2022-03-19 10:41:49,649 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 16 states have internal predecessors, (92), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-19 10:41:49,649 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 936 transitions. [2022-03-19 10:41:49,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-19 10:41:49,651 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:49,651 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:49,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-19 10:41:49,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-19 10:41:49,874 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:49,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:49,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1255136270, now seen corresponding path program 17 times [2022-03-19 10:41:49,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:49,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1834479793] [2022-03-19 10:41:49,874 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:49,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1255136270, now seen corresponding path program 18 times [2022-03-19 10:41:49,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:49,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587018201] [2022-03-19 10:41:49,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:49,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:49,878 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:49,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942806526] [2022-03-19 10:41:49,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:41:49,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:49,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:49,880 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:49,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-19 10:41:50,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 10:41:50,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:50,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 10:41:50,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:50,323 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 40 proven. 420 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:50,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:50,625 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 40 proven. 108 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-19 10:41:50,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:50,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587018201] [2022-03-19 10:41:50,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:50,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942806526] [2022-03-19 10:41:50,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942806526] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:50,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:50,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-03-19 10:41:50,626 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:50,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1834479793] [2022-03-19 10:41:50,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1834479793] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:50,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:50,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 10:41:50,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251143863] [2022-03-19 10:41:50,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:50,626 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 10:41:50,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:50,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 10:41:50,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:41:50,627 INFO L87 Difference]: Start difference. First operand 690 states and 936 transitions. Second operand has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 16 states have internal predecessors, (94), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-19 10:41:51,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:51,041 INFO L93 Difference]: Finished difference Result 903 states and 1260 transitions. [2022-03-19 10:41:51,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-19 10:41:51,042 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 16 states have internal predecessors, (94), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) Word has length 131 [2022-03-19 10:41:51,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:51,044 INFO L225 Difference]: With dead ends: 903 [2022-03-19 10:41:51,044 INFO L226 Difference]: Without dead ends: 706 [2022-03-19 10:41:51,044 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=500, Invalid=760, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 10:41:51,045 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 230 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:51,045 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 302 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:41:51,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-03-19 10:41:51,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 706. [2022-03-19 10:41:51,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 536 states have (on average 1.208955223880597) internal successors, (648), 536 states have internal predecessors, (648), 153 states have call successors, (153), 18 states have call predecessors, (153), 16 states have return successors, (151), 151 states have call predecessors, (151), 151 states have call successors, (151) [2022-03-19 10:41:51,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 952 transitions. [2022-03-19 10:41:51,192 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 952 transitions. Word has length 131 [2022-03-19 10:41:51,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:51,192 INFO L478 AbstractCegarLoop]: Abstraction has 706 states and 952 transitions. [2022-03-19 10:41:51,192 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 16 states have internal predecessors, (94), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-19 10:41:51,192 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 952 transitions. [2022-03-19 10:41:51,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 10:41:51,193 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:51,194 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:51,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-19 10:41:51,394 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:51,394 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:51,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:51,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1252937077, now seen corresponding path program 11 times [2022-03-19 10:41:51,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:51,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1511731096] [2022-03-19 10:41:51,395 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:51,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1252937077, now seen corresponding path program 12 times [2022-03-19 10:41:51,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:51,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663893005] [2022-03-19 10:41:51,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:51,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:51,400 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:51,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474230] [2022-03-19 10:41:51,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:41:51,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:51,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:51,403 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:51,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-19 10:41:51,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 10:41:51,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:51,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 10:41:51,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:51,772 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 88 proven. 1 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2022-03-19 10:41:51,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:53,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:53,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663893005] [2022-03-19 10:41:53,720 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:53,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474230] [2022-03-19 10:41:53,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474230] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:41:53,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:41:53,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-19 10:41:53,720 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:53,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1511731096] [2022-03-19 10:41:53,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1511731096] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:53,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:53,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 10:41:53,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336954575] [2022-03-19 10:41:53,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:53,721 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 10:41:53,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:53,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 10:41:53,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=84, Unknown=1, NotChecked=0, Total=110 [2022-03-19 10:41:53,721 INFO L87 Difference]: Start difference. First operand 706 states and 952 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 10:41:54,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:54,094 INFO L93 Difference]: Finished difference Result 758 states and 1028 transitions. [2022-03-19 10:41:54,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 10:41:54,095 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 135 [2022-03-19 10:41:54,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:54,098 INFO L225 Difference]: With dead ends: 758 [2022-03-19 10:41:54,098 INFO L226 Difference]: Without dead ends: 746 [2022-03-19 10:41:54,098 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=43, Invalid=138, Unknown=1, NotChecked=0, Total=182 [2022-03-19 10:41:54,099 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 28 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:54,099 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 300 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:41:54,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-03-19 10:41:54,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 683. [2022-03-19 10:41:54,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 515 states have (on average 1.192233009708738) internal successors, (614), 522 states have internal predecessors, (614), 150 states have call successors, (150), 19 states have call predecessors, (150), 17 states have return successors, (148), 141 states have call predecessors, (148), 148 states have call successors, (148) [2022-03-19 10:41:54,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 912 transitions. [2022-03-19 10:41:54,301 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 912 transitions. Word has length 135 [2022-03-19 10:41:54,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:54,301 INFO L478 AbstractCegarLoop]: Abstraction has 683 states and 912 transitions. [2022-03-19 10:41:54,301 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 10:41:54,302 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 912 transitions. [2022-03-19 10:41:54,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 10:41:54,303 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:54,303 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 8, 8, 8, 8, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:54,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-19 10:41:54,508 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-19 10:41:54,508 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:54,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:54,508 INFO L85 PathProgramCache]: Analyzing trace with hash 200539575, now seen corresponding path program 13 times [2022-03-19 10:41:54,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:54,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [574811940] [2022-03-19 10:41:54,509 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:54,509 INFO L85 PathProgramCache]: Analyzing trace with hash 200539575, now seen corresponding path program 14 times [2022-03-19 10:41:54,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:54,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198341515] [2022-03-19 10:41:54,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:54,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:54,518 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:54,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970785587] [2022-03-19 10:41:54,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:41:54,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:54,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:54,519 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:54,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-19 10:41:54,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:41:54,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:54,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 10:41:54,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:54,898 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 28 proven. 508 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:41:54,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 28 proven. 144 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-19 10:41:55,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:55,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198341515] [2022-03-19 10:41:55,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:55,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970785587] [2022-03-19 10:41:55,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970785587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:55,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:55,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2022-03-19 10:41:55,230 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:55,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [574811940] [2022-03-19 10:41:55,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [574811940] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:55,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:55,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 10:41:55,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016207084] [2022-03-19 10:41:55,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:55,231 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 10:41:55,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:55,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 10:41:55,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:41:55,232 INFO L87 Difference]: Start difference. First operand 683 states and 912 transitions. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 17 states have internal predecessors, (96), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-19 10:41:55,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:55,775 INFO L93 Difference]: Finished difference Result 734 states and 982 transitions. [2022-03-19 10:41:55,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-19 10:41:55,775 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 17 states have internal predecessors, (96), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 135 [2022-03-19 10:41:55,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:55,783 INFO L225 Difference]: With dead ends: 734 [2022-03-19 10:41:55,784 INFO L226 Difference]: Without dead ends: 729 [2022-03-19 10:41:55,784 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 10:41:55,784 INFO L912 BasicCegarLoop]: 72 mSDtfsCounter, 227 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:55,785 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 315 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:41:55,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-03-19 10:41:55,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 707. [2022-03-19 10:41:55,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 525 states have (on average 1.1923809523809523) internal successors, (626), 542 states have internal predecessors, (626), 163 states have call successors, (163), 20 states have call predecessors, (163), 18 states have return successors, (161), 144 states have call predecessors, (161), 161 states have call successors, (161) [2022-03-19 10:41:55,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 950 transitions. [2022-03-19 10:41:55,949 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 950 transitions. Word has length 135 [2022-03-19 10:41:55,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:55,949 INFO L478 AbstractCegarLoop]: Abstraction has 707 states and 950 transitions. [2022-03-19 10:41:55,949 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 17 states have internal predecessors, (96), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-19 10:41:55,949 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 950 transitions. [2022-03-19 10:41:55,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-19 10:41:55,951 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:55,951 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:55,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-19 10:41:56,173 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:56,173 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:56,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:56,174 INFO L85 PathProgramCache]: Analyzing trace with hash -972958086, now seen corresponding path program 21 times [2022-03-19 10:41:56,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:56,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1277143692] [2022-03-19 10:41:56,174 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:56,174 INFO L85 PathProgramCache]: Analyzing trace with hash -972958086, now seen corresponding path program 22 times [2022-03-19 10:41:56,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:56,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228376804] [2022-03-19 10:41:56,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:56,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:56,179 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:56,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731642707] [2022-03-19 10:41:56,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:41:56,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:56,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:56,181 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:56,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-19 10:41:56,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:41:56,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:56,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 10:41:56,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 47 proven. 112 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2022-03-19 10:41:58,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:59,808 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 67 proven. 92 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2022-03-19 10:41:59,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:59,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228376804] [2022-03-19 10:41:59,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:59,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731642707] [2022-03-19 10:41:59,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731642707] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:59,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:59,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-03-19 10:41:59,809 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:59,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1277143692] [2022-03-19 10:41:59,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1277143692] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:59,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:59,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 10:41:59,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646093372] [2022-03-19 10:41:59,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:59,809 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 10:41:59,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:59,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 10:41:59,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-03-19 10:41:59,809 INFO L87 Difference]: Start difference. First operand 707 states and 950 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-19 10:42:01,933 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:42:02,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:42:02,346 INFO L93 Difference]: Finished difference Result 964 states and 1336 transitions. [2022-03-19 10:42:02,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 10:42:02,347 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) Word has length 137 [2022-03-19 10:42:02,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:42:02,350 INFO L225 Difference]: With dead ends: 964 [2022-03-19 10:42:02,350 INFO L226 Difference]: Without dead ends: 851 [2022-03-19 10:42:02,350 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-03-19 10:42:02,351 INFO L912 BasicCegarLoop]: 79 mSDtfsCounter, 28 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:42:02,351 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 599 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 1 Unknown, 171 Unchecked, 2.0s Time] [2022-03-19 10:42:02,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-03-19 10:42:02,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 707. [2022-03-19 10:42:02,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 525 states have (on average 1.1923809523809523) internal successors, (626), 542 states have internal predecessors, (626), 163 states have call successors, (163), 20 states have call predecessors, (163), 18 states have return successors, (161), 144 states have call predecessors, (161), 161 states have call successors, (161) [2022-03-19 10:42:02,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 950 transitions. [2022-03-19 10:42:02,540 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 950 transitions. Word has length 137 [2022-03-19 10:42:02,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:42:02,540 INFO L478 AbstractCegarLoop]: Abstraction has 707 states and 950 transitions. [2022-03-19 10:42:02,540 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-19 10:42:02,540 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 950 transitions. [2022-03-19 10:42:02,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-19 10:42:02,542 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:42:02,542 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 7, 7, 7, 7, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:42:02,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-19 10:42:02,742 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:02,742 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:42:02,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:42:02,742 INFO L85 PathProgramCache]: Analyzing trace with hash -134259028, now seen corresponding path program 23 times [2022-03-19 10:42:02,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:02,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [548792413] [2022-03-19 10:42:02,743 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:42:02,743 INFO L85 PathProgramCache]: Analyzing trace with hash -134259028, now seen corresponding path program 24 times [2022-03-19 10:42:02,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:42:02,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157199963] [2022-03-19 10:42:02,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:42:02,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:42:02,748 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:42:02,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1277081824] [2022-03-19 10:42:02,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:42:02,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:02,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:42:02,750 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:42:02,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-19 10:42:02,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 10:42:02,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:42:02,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 10:42:02,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:42:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 28 proven. 498 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:42:03,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:42:03,602 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 28 proven. 134 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-19 10:42:03,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:42:03,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157199963] [2022-03-19 10:42:03,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:42:03,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277081824] [2022-03-19 10:42:03,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277081824] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:42:03,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:42:03,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 24 [2022-03-19 10:42:03,603 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:42:03,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [548792413] [2022-03-19 10:42:03,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [548792413] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:42:03,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:42:03,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 10:42:03,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574843483] [2022-03-19 10:42:03,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:42:03,604 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 10:42:03,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:03,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 10:42:03,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:42:03,605 INFO L87 Difference]: Start difference. First operand 707 states and 950 transitions. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-19 10:42:04,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:42:04,203 INFO L93 Difference]: Finished difference Result 807 states and 1089 transitions. [2022-03-19 10:42:04,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 10:42:04,204 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 137 [2022-03-19 10:42:04,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:42:04,207 INFO L225 Difference]: With dead ends: 807 [2022-03-19 10:42:04,207 INFO L226 Difference]: Without dead ends: 802 [2022-03-19 10:42:04,208 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=479, Invalid=781, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 10:42:04,208 INFO L912 BasicCegarLoop]: 75 mSDtfsCounter, 321 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:42:04,208 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 344 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:42:04,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-03-19 10:42:04,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 775. [2022-03-19 10:42:04,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 579 states have (on average 1.2037996545768566) internal successors, (697), 596 states have internal predecessors, (697), 176 states have call successors, (176), 21 states have call predecessors, (176), 19 states have return successors, (174), 157 states have call predecessors, (174), 174 states have call successors, (174) [2022-03-19 10:42:04,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1047 transitions. [2022-03-19 10:42:04,379 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1047 transitions. Word has length 137 [2022-03-19 10:42:04,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:42:04,379 INFO L478 AbstractCegarLoop]: Abstraction has 775 states and 1047 transitions. [2022-03-19 10:42:04,379 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-19 10:42:04,379 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1047 transitions. [2022-03-19 10:42:04,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-19 10:42:04,381 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:42:04,381 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 8, 7, 7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:42:04,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-19 10:42:04,586 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-19 10:42:04,586 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:42:04,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:42:04,587 INFO L85 PathProgramCache]: Analyzing trace with hash -895861967, now seen corresponding path program 19 times [2022-03-19 10:42:04,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:04,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1849017740] [2022-03-19 10:42:04,587 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:42:04,587 INFO L85 PathProgramCache]: Analyzing trace with hash -895861967, now seen corresponding path program 20 times [2022-03-19 10:42:04,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:42:04,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815304101] [2022-03-19 10:42:04,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:42:04,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:42:04,592 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:42:04,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [944200508] [2022-03-19 10:42:04,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:42:04,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:04,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:42:04,593 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:42:04,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-19 10:42:04,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:42:04,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:42:04,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 10:42:04,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:42:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 42 proven. 498 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:42:04,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:42:05,242 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 42 proven. 134 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-19 10:42:05,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:42:05,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815304101] [2022-03-19 10:42:05,243 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:42:05,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944200508] [2022-03-19 10:42:05,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944200508] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:42:05,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:42:05,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2022-03-19 10:42:05,243 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:42:05,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1849017740] [2022-03-19 10:42:05,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1849017740] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:42:05,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:42:05,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 10:42:05,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987999867] [2022-03-19 10:42:05,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:42:05,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 10:42:05,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:05,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 10:42:05,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:42:05,244 INFO L87 Difference]: Start difference. First operand 775 states and 1047 transitions. Second operand has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 17 states have internal predecessors, (100), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-19 10:42:05,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:42:05,783 INFO L93 Difference]: Finished difference Result 945 states and 1302 transitions. [2022-03-19 10:42:05,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 10:42:05,783 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 17 states have internal predecessors, (100), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 139 [2022-03-19 10:42:05,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:42:05,786 INFO L225 Difference]: With dead ends: 945 [2022-03-19 10:42:05,786 INFO L226 Difference]: Without dead ends: 775 [2022-03-19 10:42:05,787 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 254 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=522, Invalid=810, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 10:42:05,787 INFO L912 BasicCegarLoop]: 72 mSDtfsCounter, 276 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:42:05,787 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 311 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:42:05,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-03-19 10:42:06,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 775. [2022-03-19 10:42:06,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 579 states have (on average 1.1934369602763386) internal successors, (691), 596 states have internal predecessors, (691), 176 states have call successors, (176), 21 states have call predecessors, (176), 19 states have return successors, (174), 157 states have call predecessors, (174), 174 states have call successors, (174) [2022-03-19 10:42:06,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1041 transitions. [2022-03-19 10:42:06,036 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1041 transitions. Word has length 139 [2022-03-19 10:42:06,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:42:06,037 INFO L478 AbstractCegarLoop]: Abstraction has 775 states and 1041 transitions. [2022-03-19 10:42:06,037 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 17 states have internal predecessors, (100), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-19 10:42:06,037 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1041 transitions. [2022-03-19 10:42:06,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-19 10:42:06,039 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:42:06,039 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 7, 7, 7, 7, 6, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:42:06,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-19 10:42:06,241 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-19 10:42:06,241 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:42:06,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:42:06,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1908608861, now seen corresponding path program 25 times [2022-03-19 10:42:06,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:06,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1154336893] [2022-03-19 10:42:06,242 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:42:06,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1908608861, now seen corresponding path program 26 times [2022-03-19 10:42:06,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:42:06,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399896131] [2022-03-19 10:42:06,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:42:06,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:42:06,247 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:42:06,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525888920] [2022-03-19 10:42:06,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:42:06,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:06,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:42:06,248 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:42:06,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-19 10:42:06,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:42:06,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:42:06,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 10:42:06,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:42:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 36 proven. 566 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:42:06,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:42:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 36 proven. 146 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-19 10:42:06,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:42:06,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399896131] [2022-03-19 10:42:06,984 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:42:06,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525888920] [2022-03-19 10:42:06,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525888920] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:42:06,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:42:06,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 24 [2022-03-19 10:42:06,984 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:42:06,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1154336893] [2022-03-19 10:42:06,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1154336893] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:42:06,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:42:06,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 10:42:06,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033289713] [2022-03-19 10:42:06,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:42:06,985 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 10:42:06,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:06,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 10:42:06,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:42:06,985 INFO L87 Difference]: Start difference. First operand 775 states and 1041 transitions. Second operand has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-19 10:42:07,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:42:07,520 INFO L93 Difference]: Finished difference Result 981 states and 1345 transitions. [2022-03-19 10:42:07,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 10:42:07,520 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) Word has length 145 [2022-03-19 10:42:07,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:42:07,523 INFO L225 Difference]: With dead ends: 981 [2022-03-19 10:42:07,523 INFO L226 Difference]: Without dead ends: 789 [2022-03-19 10:42:07,524 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=509, Invalid=823, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 10:42:07,525 INFO L912 BasicCegarLoop]: 75 mSDtfsCounter, 235 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:42:07,525 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 341 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:42:07,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-03-19 10:42:07,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 778. [2022-03-19 10:42:07,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 582 states have (on average 1.1872852233676976) internal successors, (691), 594 states have internal predecessors, (691), 176 states have call successors, (176), 21 states have call predecessors, (176), 19 states have return successors, (174), 162 states have call predecessors, (174), 174 states have call successors, (174) [2022-03-19 10:42:07,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1041 transitions. [2022-03-19 10:42:07,714 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1041 transitions. Word has length 145 [2022-03-19 10:42:07,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:42:07,714 INFO L478 AbstractCegarLoop]: Abstraction has 778 states and 1041 transitions. [2022-03-19 10:42:07,714 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-19 10:42:07,715 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1041 transitions. [2022-03-19 10:42:07,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-19 10:42:07,716 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:42:07,717 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 9, 8, 8, 8, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:42:07,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-19 10:42:07,931 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-19 10:42:07,931 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:42:07,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:42:07,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1963931820, now seen corresponding path program 21 times [2022-03-19 10:42:07,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:07,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2015361984] [2022-03-19 10:42:07,932 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:42:07,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1963931820, now seen corresponding path program 22 times [2022-03-19 10:42:07,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:42:07,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272033725] [2022-03-19 10:42:07,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:42:07,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:42:07,938 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:42:07,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372281083] [2022-03-19 10:42:07,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:42:07,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:07,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:42:07,939 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:42:07,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-19 10:42:08,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:42:08,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:42:08,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 10:42:08,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:42:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 44 proven. 584 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:42:08,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:42:08,728 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 44 proven. 164 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-19 10:42:08,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:42:08,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272033725] [2022-03-19 10:42:08,728 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:42:08,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372281083] [2022-03-19 10:42:08,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372281083] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:42:08,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:42:08,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 24 [2022-03-19 10:42:08,729 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:42:08,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2015361984] [2022-03-19 10:42:08,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2015361984] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:42:08,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:42:08,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 10:42:08,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833018220] [2022-03-19 10:42:08,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:42:08,729 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 10:42:08,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:08,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 10:42:08,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:42:08,730 INFO L87 Difference]: Start difference. First operand 778 states and 1041 transitions. Second operand has 19 states, 19 states have (on average 5.578947368421052) internal successors, (106), 18 states have internal predecessors, (106), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-19 10:42:09,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:42:09,292 INFO L93 Difference]: Finished difference Result 965 states and 1319 transitions. [2022-03-19 10:42:09,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-19 10:42:09,292 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.578947368421052) internal successors, (106), 18 states have internal predecessors, (106), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) Word has length 147 [2022-03-19 10:42:09,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:42:09,296 INFO L225 Difference]: With dead ends: 965 [2022-03-19 10:42:09,296 INFO L226 Difference]: Without dead ends: 795 [2022-03-19 10:42:09,297 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 270 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=544, Invalid=862, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 10:42:09,297 INFO L912 BasicCegarLoop]: 75 mSDtfsCounter, 266 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:42:09,297 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 321 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:42:09,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-03-19 10:42:09,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 795. [2022-03-19 10:42:09,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 599 states have (on average 1.1819699499165275) internal successors, (708), 606 states have internal predecessors, (708), 176 states have call successors, (176), 21 states have call predecessors, (176), 19 states have return successors, (174), 167 states have call predecessors, (174), 174 states have call successors, (174) [2022-03-19 10:42:09,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1058 transitions. [2022-03-19 10:42:09,550 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1058 transitions. Word has length 147 [2022-03-19 10:42:09,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:42:09,550 INFO L478 AbstractCegarLoop]: Abstraction has 795 states and 1058 transitions. [2022-03-19 10:42:09,550 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.578947368421052) internal successors, (106), 18 states have internal predecessors, (106), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-19 10:42:09,550 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1058 transitions. [2022-03-19 10:42:09,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-19 10:42:09,552 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:42:09,552 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:42:09,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-19 10:42:09,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:09,767 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:42:09,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:42:09,768 INFO L85 PathProgramCache]: Analyzing trace with hash -913503479, now seen corresponding path program 15 times [2022-03-19 10:42:09,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:09,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1152581676] [2022-03-19 10:42:09,768 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:42:09,768 INFO L85 PathProgramCache]: Analyzing trace with hash -913503479, now seen corresponding path program 16 times [2022-03-19 10:42:09,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:42:09,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2849617] [2022-03-19 10:42:09,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:42:09,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:42:09,773 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:42:09,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616811345] [2022-03-19 10:42:09,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:42:09,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:09,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:42:09,775 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:42:09,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-19 10:42:09,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:42:09,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:42:09,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 10:42:09,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:42:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 32 proven. 642 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:42:10,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:42:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 32 proven. 162 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-19 10:42:10,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:42:10,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2849617] [2022-03-19 10:42:10,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:42:10,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616811345] [2022-03-19 10:42:10,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616811345] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:42:10,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:42:10,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 24 [2022-03-19 10:42:10,515 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:42:10,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1152581676] [2022-03-19 10:42:10,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1152581676] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:42:10,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:42:10,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 10:42:10,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547593683] [2022-03-19 10:42:10,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:42:10,516 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 10:42:10,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:10,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 10:42:10,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:42:10,516 INFO L87 Difference]: Start difference. First operand 795 states and 1058 transitions. Second operand has 20 states, 20 states have (on average 5.4) internal successors, (108), 19 states have internal predecessors, (108), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-19 10:42:11,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:42:11,145 INFO L93 Difference]: Finished difference Result 846 states and 1128 transitions. [2022-03-19 10:42:11,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-19 10:42:11,145 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.4) internal successors, (108), 19 states have internal predecessors, (108), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) Word has length 151 [2022-03-19 10:42:11,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:42:11,149 INFO L225 Difference]: With dead ends: 846 [2022-03-19 10:42:11,149 INFO L226 Difference]: Without dead ends: 841 [2022-03-19 10:42:11,149 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 278 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=499, Invalid=833, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 10:42:11,149 INFO L912 BasicCegarLoop]: 78 mSDtfsCounter, 278 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:42:11,149 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 357 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:42:11,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-03-19 10:42:11,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 819. [2022-03-19 10:42:11,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 609 states have (on average 1.1822660098522169) internal successors, (720), 626 states have internal predecessors, (720), 189 states have call successors, (189), 22 states have call predecessors, (189), 20 states have return successors, (187), 170 states have call predecessors, (187), 187 states have call successors, (187) [2022-03-19 10:42:11,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1096 transitions. [2022-03-19 10:42:11,420 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1096 transitions. Word has length 151 [2022-03-19 10:42:11,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:42:11,431 INFO L478 AbstractCegarLoop]: Abstraction has 819 states and 1096 transitions. [2022-03-19 10:42:11,431 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.4) internal successors, (108), 19 states have internal predecessors, (108), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-19 10:42:11,431 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1096 transitions. [2022-03-19 10:42:11,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-19 10:42:11,433 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:42:11,433 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 8, 8, 8, 8, 6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:42:11,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-19 10:42:11,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-19 10:42:11,656 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:42:11,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:42:11,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1031451968, now seen corresponding path program 27 times [2022-03-19 10:42:11,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:11,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [445299154] [2022-03-19 10:42:11,656 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:42:11,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1031451968, now seen corresponding path program 28 times [2022-03-19 10:42:11,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:42:11,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622353739] [2022-03-19 10:42:11,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:42:11,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:42:11,662 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:42:11,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [888141574] [2022-03-19 10:42:11,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:42:11,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:11,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:42:11,663 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:42:11,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-19 10:42:11,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:42:11,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:42:11,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 10:42:11,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:42:12,079 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 38 proven. 654 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:42:12,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:42:12,374 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 38 proven. 174 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-19 10:42:12,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:42:12,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622353739] [2022-03-19 10:42:12,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:42:12,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888141574] [2022-03-19 10:42:12,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888141574] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:42:12,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:42:12,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 24 [2022-03-19 10:42:12,375 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:42:12,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [445299154] [2022-03-19 10:42:12,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [445299154] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:42:12,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:42:12,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 10:42:12,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175859057] [2022-03-19 10:42:12,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:42:12,376 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 10:42:12,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:12,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 10:42:12,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:42:12,376 INFO L87 Difference]: Start difference. First operand 819 states and 1096 transitions. Second operand has 20 states, 20 states have (on average 5.5) internal successors, (110), 19 states have internal predecessors, (110), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-19 10:42:12,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:42:12,978 INFO L93 Difference]: Finished difference Result 1023 states and 1398 transitions. [2022-03-19 10:42:12,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 10:42:12,978 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.5) internal successors, (110), 19 states have internal predecessors, (110), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) Word has length 153 [2022-03-19 10:42:12,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:42:12,981 INFO L225 Difference]: With dead ends: 1023 [2022-03-19 10:42:12,981 INFO L226 Difference]: Without dead ends: 845 [2022-03-19 10:42:12,981 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 282 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=530, Invalid=876, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 10:42:12,982 INFO L912 BasicCegarLoop]: 78 mSDtfsCounter, 272 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:42:12,982 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 359 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:42:12,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-03-19 10:42:13,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 834. [2022-03-19 10:42:13,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 624 states have (on average 1.1826923076923077) internal successors, (738), 636 states have internal predecessors, (738), 189 states have call successors, (189), 22 states have call predecessors, (189), 20 states have return successors, (187), 175 states have call predecessors, (187), 187 states have call successors, (187) [2022-03-19 10:42:13,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1114 transitions. [2022-03-19 10:42:13,284 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1114 transitions. Word has length 153 [2022-03-19 10:42:13,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:42:13,285 INFO L478 AbstractCegarLoop]: Abstraction has 834 states and 1114 transitions. [2022-03-19 10:42:13,285 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.5) internal successors, (110), 19 states have internal predecessors, (110), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-19 10:42:13,285 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1114 transitions. [2022-03-19 10:42:13,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-19 10:42:13,287 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:42:13,287 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 10, 9, 9, 9, 7, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:42:13,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-19 10:42:13,511 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:13,511 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:42:13,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:42:13,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1196851319, now seen corresponding path program 23 times [2022-03-19 10:42:13,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:13,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [422284572] [2022-03-19 10:42:13,512 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:42:13,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1196851319, now seen corresponding path program 24 times [2022-03-19 10:42:13,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:42:13,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378267660] [2022-03-19 10:42:13,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:42:13,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:42:13,520 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:42:13,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628807707] [2022-03-19 10:42:13,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:42:13,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:13,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:42:13,522 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:42:13,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-19 10:42:13,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 10:42:13,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:42:13,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 10:42:13,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:42:14,196 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 46 proven. 678 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:42:14,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:42:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 46 proven. 198 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-19 10:42:14,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:42:14,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378267660] [2022-03-19 10:42:14,535 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:42:14,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628807707] [2022-03-19 10:42:14,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628807707] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:42:14,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:42:14,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 24 [2022-03-19 10:42:14,535 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:42:14,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [422284572] [2022-03-19 10:42:14,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [422284572] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:42:14,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:42:14,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 10:42:14,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990053401] [2022-03-19 10:42:14,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:42:14,536 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 10:42:14,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:14,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 10:42:14,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:42:14,537 INFO L87 Difference]: Start difference. First operand 834 states and 1114 transitions. Second operand has 20 states, 20 states have (on average 5.6) internal successors, (112), 19 states have internal predecessors, (112), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-19 10:42:15,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:42:15,266 INFO L93 Difference]: Finished difference Result 1021 states and 1392 transitions. [2022-03-19 10:42:15,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 10:42:15,266 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.6) internal successors, (112), 19 states have internal predecessors, (112), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) Word has length 155 [2022-03-19 10:42:15,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:42:15,269 INFO L225 Difference]: With dead ends: 1021 [2022-03-19 10:42:15,269 INFO L226 Difference]: Without dead ends: 851 [2022-03-19 10:42:15,270 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=566, Invalid=916, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 10:42:15,270 INFO L912 BasicCegarLoop]: 78 mSDtfsCounter, 267 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:42:15,270 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 368 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:42:15,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-03-19 10:42:15,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 851. [2022-03-19 10:42:15,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 641 states have (on average 1.1778471138845554) internal successors, (755), 648 states have internal predecessors, (755), 189 states have call successors, (189), 22 states have call predecessors, (189), 20 states have return successors, (187), 180 states have call predecessors, (187), 187 states have call successors, (187) [2022-03-19 10:42:15,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1131 transitions. [2022-03-19 10:42:15,467 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1131 transitions. Word has length 155 [2022-03-19 10:42:15,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:42:15,467 INFO L478 AbstractCegarLoop]: Abstraction has 851 states and 1131 transitions. [2022-03-19 10:42:15,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.6) internal successors, (112), 19 states have internal predecessors, (112), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-19 10:42:15,467 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1131 transitions. [2022-03-19 10:42:15,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-03-19 10:42:15,469 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:42:15,469 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 8, 8, 8, 8, 6, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:42:15,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-19 10:42:15,669 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:15,670 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:42:15,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:42:15,670 INFO L85 PathProgramCache]: Analyzing trace with hash -61113684, now seen corresponding path program 17 times [2022-03-19 10:42:15,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:15,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [882811139] [2022-03-19 10:42:15,671 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:42:15,671 INFO L85 PathProgramCache]: Analyzing trace with hash -61113684, now seen corresponding path program 18 times [2022-03-19 10:42:15,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:42:15,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281895587] [2022-03-19 10:42:15,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:42:15,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:42:15,677 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:42:15,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048275193] [2022-03-19 10:42:15,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:42:15,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:15,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:42:15,680 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:42:15,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-19 10:42:16,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 10:42:16,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:42:16,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 10:42:16,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:42:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 34 proven. 734 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:42:16,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:42:17,070 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 34 proven. 190 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2022-03-19 10:42:17,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:42:17,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281895587] [2022-03-19 10:42:17,070 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:42:17,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048275193] [2022-03-19 10:42:17,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048275193] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:42:17,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:42:17,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 24 [2022-03-19 10:42:17,071 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:42:17,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [882811139] [2022-03-19 10:42:17,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [882811139] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:42:17,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:42:17,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 10:42:17,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338300651] [2022-03-19 10:42:17,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:42:17,071 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 10:42:17,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:17,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 10:42:17,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:42:17,072 INFO L87 Difference]: Start difference. First operand 851 states and 1131 transitions. Second operand has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 20 states have internal predecessors, (114), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-19 10:42:17,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:42:17,697 INFO L93 Difference]: Finished difference Result 902 states and 1201 transitions. [2022-03-19 10:42:17,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 10:42:17,697 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 20 states have internal predecessors, (114), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) Word has length 159 [2022-03-19 10:42:17,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:42:17,699 INFO L225 Difference]: With dead ends: 902 [2022-03-19 10:42:17,699 INFO L226 Difference]: Without dead ends: 897 [2022-03-19 10:42:17,700 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 294 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=519, Invalid=887, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 10:42:17,700 INFO L912 BasicCegarLoop]: 81 mSDtfsCounter, 274 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:42:17,700 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 389 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:42:17,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-03-19 10:42:17,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 875. [2022-03-19 10:42:17,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 651 states have (on average 1.1781874039938556) internal successors, (767), 668 states have internal predecessors, (767), 202 states have call successors, (202), 23 states have call predecessors, (202), 21 states have return successors, (200), 183 states have call predecessors, (200), 200 states have call successors, (200) [2022-03-19 10:42:17,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1169 transitions. [2022-03-19 10:42:17,916 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1169 transitions. Word has length 159 [2022-03-19 10:42:17,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:42:17,916 INFO L478 AbstractCegarLoop]: Abstraction has 875 states and 1169 transitions. [2022-03-19 10:42:17,916 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 20 states have internal predecessors, (114), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-19 10:42:17,916 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1169 transitions. [2022-03-19 10:42:17,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-19 10:42:17,918 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:42:17,918 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 9, 9, 9, 9, 6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:42:17,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-19 10:42:18,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:18,119 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:42:18,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:42:18,120 INFO L85 PathProgramCache]: Analyzing trace with hash -160708573, now seen corresponding path program 29 times [2022-03-19 10:42:18,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:18,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1494010140] [2022-03-19 10:42:18,120 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:42:18,120 INFO L85 PathProgramCache]: Analyzing trace with hash -160708573, now seen corresponding path program 30 times [2022-03-19 10:42:18,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:42:18,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017832151] [2022-03-19 10:42:18,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:42:18,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:42:18,125 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:42:18,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739126799] [2022-03-19 10:42:18,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:42:18,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:18,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:42:18,126 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:42:18,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-19 10:42:19,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 10:42:19,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:42:19,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 10:42:19,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:42:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 40 proven. 750 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:42:19,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:42:19,815 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 40 proven. 206 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2022-03-19 10:42:19,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:42:19,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017832151] [2022-03-19 10:42:19,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:42:19,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739126799] [2022-03-19 10:42:19,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739126799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:42:19,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:42:19,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 24 [2022-03-19 10:42:19,816 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:42:19,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1494010140] [2022-03-19 10:42:19,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1494010140] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:42:19,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:42:19,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 10:42:19,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192002589] [2022-03-19 10:42:19,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:42:19,817 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 10:42:19,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:19,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 10:42:19,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:42:19,817 INFO L87 Difference]: Start difference. First operand 875 states and 1169 transitions. Second operand has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 20 states have internal predecessors, (116), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-19 10:42:20,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:42:20,564 INFO L93 Difference]: Finished difference Result 1079 states and 1471 transitions. [2022-03-19 10:42:20,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-19 10:42:20,565 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 20 states have internal predecessors, (116), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) Word has length 161 [2022-03-19 10:42:20,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:42:20,570 INFO L225 Difference]: With dead ends: 1079 [2022-03-19 10:42:20,570 INFO L226 Difference]: Without dead ends: 901 [2022-03-19 10:42:20,571 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=551, Invalid=931, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 10:42:20,571 INFO L912 BasicCegarLoop]: 81 mSDtfsCounter, 306 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:42:20,572 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 366 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:42:20,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2022-03-19 10:42:20,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 890. [2022-03-19 10:42:20,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 666 states have (on average 1.1786786786786787) internal successors, (785), 678 states have internal predecessors, (785), 202 states have call successors, (202), 23 states have call predecessors, (202), 21 states have return successors, (200), 188 states have call predecessors, (200), 200 states have call successors, (200) [2022-03-19 10:42:20,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1187 transitions. [2022-03-19 10:42:20,857 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1187 transitions. Word has length 161 [2022-03-19 10:42:20,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:42:20,858 INFO L478 AbstractCegarLoop]: Abstraction has 890 states and 1187 transitions. [2022-03-19 10:42:20,858 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 20 states have internal predecessors, (116), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-19 10:42:20,858 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1187 transitions. [2022-03-19 10:42:20,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-19 10:42:20,859 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:42:20,860 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 8, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:42:20,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-19 10:42:21,060 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:21,060 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:42:21,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:42:21,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1942329766, now seen corresponding path program 25 times [2022-03-19 10:42:21,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:21,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1782499944] [2022-03-19 10:42:21,061 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:42:21,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1942329766, now seen corresponding path program 26 times [2022-03-19 10:42:21,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:42:21,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306564141] [2022-03-19 10:42:21,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:42:21,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:42:21,065 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:42:21,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668858138] [2022-03-19 10:42:21,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:42:21,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:21,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:42:21,067 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:42:21,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-19 10:42:21,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:42:21,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:42:21,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 10:42:21,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:42:21,544 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 54 proven. 726 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:42:21,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:42:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 54 proven. 182 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2022-03-19 10:42:21,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:42:21,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306564141] [2022-03-19 10:42:21,837 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:42:21,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668858138] [2022-03-19 10:42:21,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668858138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:42:21,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:42:21,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 24 [2022-03-19 10:42:21,837 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:42:21,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1782499944] [2022-03-19 10:42:21,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1782499944] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:42:21,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:42:21,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 10:42:21,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62240966] [2022-03-19 10:42:21,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:42:21,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 10:42:21,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:21,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 10:42:21,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:42:21,839 INFO L87 Difference]: Start difference. First operand 890 states and 1187 transitions. Second operand has 21 states, 21 states have (on average 5.619047619047619) internal successors, (118), 20 states have internal predecessors, (118), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-19 10:42:22,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:42:22,505 INFO L93 Difference]: Finished difference Result 1077 states and 1465 transitions. [2022-03-19 10:42:22,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-19 10:42:22,506 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.619047619047619) internal successors, (118), 20 states have internal predecessors, (118), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) Word has length 163 [2022-03-19 10:42:22,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:42:22,508 INFO L225 Difference]: With dead ends: 1077 [2022-03-19 10:42:22,508 INFO L226 Difference]: Without dead ends: 907 [2022-03-19 10:42:22,509 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=588, Invalid=972, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 10:42:22,509 INFO L912 BasicCegarLoop]: 81 mSDtfsCounter, 324 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:42:22,509 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 365 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:42:22,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-03-19 10:42:22,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 907. [2022-03-19 10:42:22,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 683 states have (on average 1.1742313323572475) internal successors, (802), 690 states have internal predecessors, (802), 202 states have call successors, (202), 23 states have call predecessors, (202), 21 states have return successors, (200), 193 states have call predecessors, (200), 200 states have call successors, (200) [2022-03-19 10:42:22,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1204 transitions. [2022-03-19 10:42:22,714 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1204 transitions. Word has length 163 [2022-03-19 10:42:22,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:42:22,714 INFO L478 AbstractCegarLoop]: Abstraction has 907 states and 1204 transitions. [2022-03-19 10:42:22,714 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.619047619047619) internal successors, (118), 20 states have internal predecessors, (118), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-19 10:42:22,714 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1204 transitions. [2022-03-19 10:42:22,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-19 10:42:22,716 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:42:22,716 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 9, 9, 9, 9, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:42:22,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-19 10:42:22,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-19 10:42:22,919 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:42:22,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:42:22,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1797417137, now seen corresponding path program 19 times [2022-03-19 10:42:22,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:22,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1617060226] [2022-03-19 10:42:22,920 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:42:22,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1797417137, now seen corresponding path program 20 times [2022-03-19 10:42:22,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:42:22,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464281988] [2022-03-19 10:42:22,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:42:22,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:42:22,924 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:42:22,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238579577] [2022-03-19 10:42:22,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:42:22,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:22,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:42:22,926 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:42:22,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-19 10:42:22,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:42:22,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:42:22,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 10:42:22,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:42:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 36 proven. 834 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:42:23,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:42:23,665 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 36 proven. 222 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-03-19 10:42:23,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:42:23,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464281988] [2022-03-19 10:42:23,665 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:42:23,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238579577] [2022-03-19 10:42:23,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238579577] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:42:23,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:42:23,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2022-03-19 10:42:23,666 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:42:23,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1617060226] [2022-03-19 10:42:23,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1617060226] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:42:23,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:42:23,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 10:42:23,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582461629] [2022-03-19 10:42:23,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:42:23,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 10:42:23,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:23,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 10:42:23,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:42:23,667 INFO L87 Difference]: Start difference. First operand 907 states and 1204 transitions. Second operand has 22 states, 22 states have (on average 5.454545454545454) internal successors, (120), 21 states have internal predecessors, (120), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-19 10:42:24,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:42:24,346 INFO L93 Difference]: Finished difference Result 958 states and 1274 transitions. [2022-03-19 10:42:24,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-19 10:42:24,346 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.454545454545454) internal successors, (120), 21 states have internal predecessors, (120), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) Word has length 167 [2022-03-19 10:42:24,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:42:24,350 INFO L225 Difference]: With dead ends: 958 [2022-03-19 10:42:24,350 INFO L226 Difference]: Without dead ends: 953 [2022-03-19 10:42:24,350 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=539, Invalid=943, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 10:42:24,350 INFO L912 BasicCegarLoop]: 84 mSDtfsCounter, 365 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:42:24,351 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 373 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:42:24,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-03-19 10:42:24,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 931. [2022-03-19 10:42:24,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 693 states have (on average 1.1746031746031746) internal successors, (814), 710 states have internal predecessors, (814), 215 states have call successors, (215), 24 states have call predecessors, (215), 22 states have return successors, (213), 196 states have call predecessors, (213), 213 states have call successors, (213) [2022-03-19 10:42:24,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1242 transitions. [2022-03-19 10:42:24,560 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1242 transitions. Word has length 167 [2022-03-19 10:42:24,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:42:24,560 INFO L478 AbstractCegarLoop]: Abstraction has 931 states and 1242 transitions. [2022-03-19 10:42:24,560 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.454545454545454) internal successors, (120), 21 states have internal predecessors, (120), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-19 10:42:24,560 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1242 transitions. [2022-03-19 10:42:24,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-03-19 10:42:24,563 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:42:24,563 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 10, 10, 10, 10, 7, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:42:24,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-19 10:42:24,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-03-19 10:42:24,779 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:42:24,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:42:24,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1993951238, now seen corresponding path program 31 times [2022-03-19 10:42:24,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:24,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1511047865] [2022-03-19 10:42:24,780 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:42:24,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1993951238, now seen corresponding path program 32 times [2022-03-19 10:42:24,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:42:24,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683813934] [2022-03-19 10:42:24,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:42:24,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:42:24,788 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:42:24,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429787177] [2022-03-19 10:42:24,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:42:24,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:24,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:42:24,789 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:42:24,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-19 10:42:24,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:42:24,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:42:24,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 10:42:24,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:42:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 42 proven. 854 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:42:25,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:42:25,662 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 42 proven. 242 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-03-19 10:42:25,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:42:25,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683813934] [2022-03-19 10:42:25,662 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:42:25,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429787177] [2022-03-19 10:42:25,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429787177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:42:25,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:42:25,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2022-03-19 10:42:25,663 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:42:25,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1511047865] [2022-03-19 10:42:25,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1511047865] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:42:25,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:42:25,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 10:42:25,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747245808] [2022-03-19 10:42:25,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:42:25,663 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 10:42:25,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:25,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 10:42:25,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:42:25,664 INFO L87 Difference]: Start difference. First operand 931 states and 1242 transitions. Second operand has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 21 states have internal predecessors, (122), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-19 10:42:26,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:42:26,350 INFO L93 Difference]: Finished difference Result 1135 states and 1544 transitions. [2022-03-19 10:42:26,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-19 10:42:26,350 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 21 states have internal predecessors, (122), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) Word has length 169 [2022-03-19 10:42:26,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:42:26,354 INFO L225 Difference]: With dead ends: 1135 [2022-03-19 10:42:26,354 INFO L226 Difference]: Without dead ends: 957 [2022-03-19 10:42:26,355 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 314 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 10:42:26,355 INFO L912 BasicCegarLoop]: 84 mSDtfsCounter, 292 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:42:26,355 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 379 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:42:26,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-03-19 10:42:26,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 946. [2022-03-19 10:42:26,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 708 states have (on average 1.1751412429378532) internal successors, (832), 720 states have internal predecessors, (832), 215 states have call successors, (215), 24 states have call predecessors, (215), 22 states have return successors, (213), 201 states have call predecessors, (213), 213 states have call successors, (213) [2022-03-19 10:42:26,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1260 transitions. [2022-03-19 10:42:26,587 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1260 transitions. Word has length 169 [2022-03-19 10:42:26,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:42:26,587 INFO L478 AbstractCegarLoop]: Abstraction has 946 states and 1260 transitions. [2022-03-19 10:42:26,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 21 states have internal predecessors, (122), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-19 10:42:26,587 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1260 transitions. [2022-03-19 10:42:26,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-03-19 10:42:26,590 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:42:26,590 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 9, 8, 8, 8, 7, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:42:26,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-19 10:42:26,803 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-19 10:42:26,803 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:42:26,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:42:26,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1121656631, now seen corresponding path program 27 times [2022-03-19 10:42:26,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:26,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [542886055] [2022-03-19 10:42:26,804 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:42:26,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1121656631, now seen corresponding path program 28 times [2022-03-19 10:42:26,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:42:26,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374921034] [2022-03-19 10:42:26,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:42:26,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:42:26,816 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:42:26,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502850310] [2022-03-19 10:42:26,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:42:26,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:26,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:42:26,817 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:42:26,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-19 10:42:26,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:42:26,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:42:26,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 10:42:26,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:42:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 56 proven. 824 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:42:27,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:42:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 56 proven. 212 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-03-19 10:42:27,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:42:27,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374921034] [2022-03-19 10:42:27,631 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:42:27,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502850310] [2022-03-19 10:42:27,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502850310] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:42:27,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:42:27,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2022-03-19 10:42:27,631 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:42:27,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [542886055] [2022-03-19 10:42:27,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [542886055] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:42:27,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:42:27,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 10:42:27,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490860314] [2022-03-19 10:42:27,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:42:27,632 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 10:42:27,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:27,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 10:42:27,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:42:27,632 INFO L87 Difference]: Start difference. First operand 946 states and 1260 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 21 states have internal predecessors, (124), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-19 10:42:28,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:42:28,370 INFO L93 Difference]: Finished difference Result 1133 states and 1538 transitions. [2022-03-19 10:42:28,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 10:42:28,370 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 21 states have internal predecessors, (124), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) Word has length 171 [2022-03-19 10:42:28,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:42:28,374 INFO L225 Difference]: With dead ends: 1133 [2022-03-19 10:42:28,374 INFO L226 Difference]: Without dead ends: 963 [2022-03-19 10:42:28,375 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 318 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=610, Invalid=1030, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 10:42:28,375 INFO L912 BasicCegarLoop]: 84 mSDtfsCounter, 338 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:42:28,375 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 359 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:42:28,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-03-19 10:42:28,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2022-03-19 10:42:28,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 725 states have (on average 1.1710344827586208) internal successors, (849), 732 states have internal predecessors, (849), 215 states have call successors, (215), 24 states have call predecessors, (215), 22 states have return successors, (213), 206 states have call predecessors, (213), 213 states have call successors, (213) [2022-03-19 10:42:28,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1277 transitions. [2022-03-19 10:42:28,611 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1277 transitions. Word has length 171 [2022-03-19 10:42:28,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:42:28,611 INFO L478 AbstractCegarLoop]: Abstraction has 963 states and 1277 transitions. [2022-03-19 10:42:28,611 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 21 states have internal predecessors, (124), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-19 10:42:28,612 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1277 transitions. [2022-03-19 10:42:28,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-03-19 10:42:28,614 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:42:28,614 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 10, 10, 10, 10, 7, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:42:28,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-19 10:42:28,835 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:28,835 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:42:28,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:42:28,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1863737586, now seen corresponding path program 21 times [2022-03-19 10:42:28,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:28,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1219421623] [2022-03-19 10:42:28,836 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:42:28,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1863737586, now seen corresponding path program 22 times [2022-03-19 10:42:28,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:42:28,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936104217] [2022-03-19 10:42:28,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:42:28,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:42:28,842 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:42:28,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49701613] [2022-03-19 10:42:28,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:42:28,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:28,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:42:28,845 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:42:28,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-19 10:42:28,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:42:28,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:42:28,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 10:42:28,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:42:29,382 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 38 proven. 942 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:42:29,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:42:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 38 proven. 258 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-03-19 10:42:29,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:42:29,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936104217] [2022-03-19 10:42:29,703 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:42:29,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49701613] [2022-03-19 10:42:29,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49701613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:42:29,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:42:29,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2022-03-19 10:42:29,703 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:42:29,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1219421623] [2022-03-19 10:42:29,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1219421623] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:42:29,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:42:29,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 10:42:29,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055931319] [2022-03-19 10:42:29,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:42:29,704 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 10:42:29,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:29,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 10:42:29,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-03-19 10:42:29,705 INFO L87 Difference]: Start difference. First operand 963 states and 1277 transitions. Second operand has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 22 states have internal predecessors, (126), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-19 10:42:30,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:42:30,457 INFO L93 Difference]: Finished difference Result 1014 states and 1347 transitions. [2022-03-19 10:42:30,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 10:42:30,457 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 22 states have internal predecessors, (126), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) Word has length 175 [2022-03-19 10:42:30,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:42:30,460 INFO L225 Difference]: With dead ends: 1014 [2022-03-19 10:42:30,461 INFO L226 Difference]: Without dead ends: 1009 [2022-03-19 10:42:30,461 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 327 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=540, Invalid=942, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 10:42:30,461 INFO L912 BasicCegarLoop]: 87 mSDtfsCounter, 368 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:42:30,461 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 397 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:42:30,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-03-19 10:42:30,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 987. [2022-03-19 10:42:30,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 735 states have (on average 1.1714285714285715) internal successors, (861), 752 states have internal predecessors, (861), 228 states have call successors, (228), 25 states have call predecessors, (228), 23 states have return successors, (226), 209 states have call predecessors, (226), 226 states have call successors, (226) [2022-03-19 10:42:30,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 1315 transitions. [2022-03-19 10:42:30,758 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 1315 transitions. Word has length 175 [2022-03-19 10:42:30,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:42:30,758 INFO L478 AbstractCegarLoop]: Abstraction has 987 states and 1315 transitions. [2022-03-19 10:42:30,759 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 22 states have internal predecessors, (126), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-19 10:42:30,759 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 1315 transitions. [2022-03-19 10:42:30,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-03-19 10:42:30,760 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:42:30,761 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 9, 9, 9, 9, 7, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:42:30,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-19 10:42:30,961 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:30,961 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:42:30,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:42:30,961 INFO L85 PathProgramCache]: Analyzing trace with hash -743527641, now seen corresponding path program 33 times [2022-03-19 10:42:30,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:30,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [450284404] [2022-03-19 10:42:30,962 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:42:30,962 INFO L85 PathProgramCache]: Analyzing trace with hash -743527641, now seen corresponding path program 34 times [2022-03-19 10:42:30,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:42:30,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960340589] [2022-03-19 10:42:30,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:42:30,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:42:30,967 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:42:30,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119601478] [2022-03-19 10:42:30,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:42:30,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:30,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:42:30,969 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:42:30,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-19 10:42:31,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:42:31,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:42:31,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 10:42:31,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:42:31,470 INFO L134 CoverageAnalysis]: Checked inductivity of 974 backedges. 46 proven. 924 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:42:31,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:42:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 974 backedges. 46 proven. 240 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-03-19 10:42:31,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:42:31,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960340589] [2022-03-19 10:42:31,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:42:31,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119601478] [2022-03-19 10:42:31,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119601478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:42:31,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:42:31,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2022-03-19 10:42:31,743 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:42:31,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [450284404] [2022-03-19 10:42:31,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [450284404] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:42:31,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:42:31,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 10:42:31,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583864048] [2022-03-19 10:42:31,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:42:31,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 10:42:31,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:31,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 10:42:31,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-03-19 10:42:31,744 INFO L87 Difference]: Start difference. First operand 987 states and 1315 transitions. Second operand has 23 states, 23 states have (on average 5.565217391304348) internal successors, (128), 22 states have internal predecessors, (128), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-19 10:42:32,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:42:32,445 INFO L93 Difference]: Finished difference Result 1191 states and 1617 transitions. [2022-03-19 10:42:32,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-19 10:42:32,445 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.565217391304348) internal successors, (128), 22 states have internal predecessors, (128), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) Word has length 177 [2022-03-19 10:42:32,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:42:32,448 INFO L225 Difference]: With dead ends: 1191 [2022-03-19 10:42:32,449 INFO L226 Difference]: Without dead ends: 1013 [2022-03-19 10:42:32,450 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 331 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=573, Invalid=987, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 10:42:32,450 INFO L912 BasicCegarLoop]: 87 mSDtfsCounter, 356 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:42:32,450 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 417 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:42:32,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-03-19 10:42:32,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1002. [2022-03-19 10:42:32,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 750 states have (on average 1.172) internal successors, (879), 762 states have internal predecessors, (879), 228 states have call successors, (228), 25 states have call predecessors, (228), 23 states have return successors, (226), 214 states have call predecessors, (226), 226 states have call successors, (226) [2022-03-19 10:42:32,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1333 transitions. [2022-03-19 10:42:32,687 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1333 transitions. Word has length 177 [2022-03-19 10:42:32,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:42:32,687 INFO L478 AbstractCegarLoop]: Abstraction has 1002 states and 1333 transitions. [2022-03-19 10:42:32,687 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.565217391304348) internal successors, (128), 22 states have internal predecessors, (128), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-19 10:42:32,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1333 transitions. [2022-03-19 10:42:32,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-03-19 10:42:32,695 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:42:32,695 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 10, 9, 9, 9, 7, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:42:32,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-19 10:42:32,900 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:32,901 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:42:32,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:42:32,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2007520492, now seen corresponding path program 29 times [2022-03-19 10:42:32,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:32,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1572351787] [2022-03-19 10:42:32,901 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:42:32,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2007520492, now seen corresponding path program 30 times [2022-03-19 10:42:32,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:42:32,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013266473] [2022-03-19 10:42:32,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:42:32,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:42:32,907 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:42:32,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72205165] [2022-03-19 10:42:32,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:42:32,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:32,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:42:32,909 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:42:32,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-19 10:42:34,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-19 10:42:34,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:42:34,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 10:42:34,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:42:34,675 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 58 proven. 930 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:42:34,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:42:34,941 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 58 proven. 246 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-03-19 10:42:34,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:42:34,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013266473] [2022-03-19 10:42:34,941 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:42:34,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72205165] [2022-03-19 10:42:34,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72205165] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:42:34,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:42:34,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2022-03-19 10:42:34,942 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:42:34,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1572351787] [2022-03-19 10:42:34,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1572351787] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:42:34,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:42:34,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 10:42:34,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640283342] [2022-03-19 10:42:34,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:42:34,942 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 10:42:34,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:34,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 10:42:34,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-03-19 10:42:34,943 INFO L87 Difference]: Start difference. First operand 1002 states and 1333 transitions. Second operand has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 22 states have internal predecessors, (130), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-19 10:42:35,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:42:35,748 INFO L93 Difference]: Finished difference Result 1189 states and 1611 transitions. [2022-03-19 10:42:35,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-19 10:42:35,748 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 22 states have internal predecessors, (130), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) Word has length 179 [2022-03-19 10:42:35,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:42:35,751 INFO L225 Difference]: With dead ends: 1189 [2022-03-19 10:42:35,751 INFO L226 Difference]: Without dead ends: 1019 [2022-03-19 10:42:35,752 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 335 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=611, Invalid=1029, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 10:42:35,752 INFO L912 BasicCegarLoop]: 87 mSDtfsCounter, 361 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:42:35,753 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 402 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:42:35,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2022-03-19 10:42:36,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 1019. [2022-03-19 10:42:36,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 767 states have (on average 1.1681877444589308) internal successors, (896), 774 states have internal predecessors, (896), 228 states have call successors, (228), 25 states have call predecessors, (228), 23 states have return successors, (226), 219 states have call predecessors, (226), 226 states have call successors, (226) [2022-03-19 10:42:36,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1350 transitions. [2022-03-19 10:42:36,071 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1350 transitions. Word has length 179 [2022-03-19 10:42:36,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:42:36,072 INFO L478 AbstractCegarLoop]: Abstraction has 1019 states and 1350 transitions. [2022-03-19 10:42:36,072 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 22 states have internal predecessors, (130), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-19 10:42:36,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1350 transitions. [2022-03-19 10:42:36,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-19 10:42:36,074 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:42:36,074 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 11, 11, 11, 8, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:42:36,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-19 10:42:36,278 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-03-19 10:42:36,279 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:42:36,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:42:36,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1274488939, now seen corresponding path program 23 times [2022-03-19 10:42:36,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:36,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2125698837] [2022-03-19 10:42:36,280 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:42:36,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1274488939, now seen corresponding path program 24 times [2022-03-19 10:42:36,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:42:36,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123646054] [2022-03-19 10:42:36,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:42:36,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:42:36,285 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:42:36,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371912787] [2022-03-19 10:42:36,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:42:36,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:36,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:42:36,289 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:42:36,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-19 10:42:37,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-19 10:42:37,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-03-19 10:42:37,483 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 10:42:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 10:42:37,720 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 10:42:37,720 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-19 10:42:37,720 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-19 10:42:37,723 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 10:42:37,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-19 10:42:37,935 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:37,938 INFO L718 BasicCegarLoop]: Path program histogram: [34, 30, 24, 8, 8, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2] [2022-03-19 10:42:37,941 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-19 10:42:37,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 10:42:37 BoogieIcfgContainer [2022-03-19 10:42:37,961 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-19 10:42:37,961 INFO L158 Benchmark]: Toolchain (without parser) took 93236.46ms. Allocated memory was 185.6MB in the beginning and 413.1MB in the end (delta: 227.5MB). Free memory was 134.4MB in the beginning and 164.8MB in the end (delta: -30.4MB). Peak memory consumption was 198.3MB. Max. memory is 8.0GB. [2022-03-19 10:42:37,961 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 185.6MB. Free memory was 150.9MB in the beginning and 150.8MB in the end (delta: 72.1kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 10:42:37,962 INFO L158 Benchmark]: CACSL2BoogieTranslator took 198.50ms. Allocated memory was 185.6MB in the beginning and 238.0MB in the end (delta: 52.4MB). Free memory was 134.2MB in the beginning and 214.3MB in the end (delta: -80.1MB). Peak memory consumption was 15.1MB. Max. memory is 8.0GB. [2022-03-19 10:42:37,962 INFO L158 Benchmark]: Boogie Preprocessor took 24.99ms. Allocated memory is still 238.0MB. Free memory was 214.3MB in the beginning and 212.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-19 10:42:37,962 INFO L158 Benchmark]: RCFGBuilder took 307.11ms. Allocated memory is still 238.0MB. Free memory was 212.9MB in the beginning and 200.9MB in the end (delta: 12.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-19 10:42:37,962 INFO L158 Benchmark]: TraceAbstraction took 92684.98ms. Allocated memory was 238.0MB in the beginning and 413.1MB in the end (delta: 175.1MB). Free memory was 200.3MB in the beginning and 164.8MB in the end (delta: 35.4MB). Peak memory consumption was 211.5MB. Max. memory is 8.0GB. [2022-03-19 10:42:37,963 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 185.6MB. Free memory was 150.9MB in the beginning and 150.8MB in the end (delta: 72.1kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 198.50ms. Allocated memory was 185.6MB in the beginning and 238.0MB in the end (delta: 52.4MB). Free memory was 134.2MB in the beginning and 214.3MB in the end (delta: -80.1MB). Peak memory consumption was 15.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 24.99ms. Allocated memory is still 238.0MB. Free memory was 214.3MB in the beginning and 212.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 307.11ms. Allocated memory is still 238.0MB. Free memory was 212.9MB in the beginning and 200.9MB in the end (delta: 12.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 92684.98ms. Allocated memory was 238.0MB in the beginning and 413.1MB in the end (delta: 175.1MB). Free memory was 200.3MB in the beginning and 164.8MB in the end (delta: 35.4MB). Peak memory consumption was 211.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) [L9] COND FALSE !(!cond) [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) [L27] CALL assume_abort_if_not(A % 2 == 1) [L9] COND FALSE !(!cond) [L27] RET assume_abort_if_not(A % 2 == 1) [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND TRUE !(r > 0) [L47] EXPR counter++ [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 [L47] EXPR counter++ [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND TRUE !(r < 0) [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND TRUE !(r > 0) [L47] EXPR counter++ [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 [L47] EXPR counter++ [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND TRUE !(r < 0) [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 [L39] EXPR counter++ [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L41] COND TRUE !(r > 0) [L47] EXPR counter++ [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 [L47] EXPR counter++ [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L49] COND TRUE !(r < 0) [L34] EXPR counter++ [L34] COND FALSE !(counter++<20) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 92.6s, OverallIterations: 64, TraceHistogramMax: 21, PathProgramHistogramMax: 34, EmptinessCheckTime: 0.1s, AutomataDifference: 27.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 8961 SdHoareTripleChecker+Valid, 15.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8938 mSDsluCounter, 16058 SdHoareTripleChecker+Invalid, 13.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 171 IncrementalHoareTripleChecker+Unchecked, 12173 mSDsCounter, 7610 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8313 IncrementalHoareTripleChecker+Invalid, 16096 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7610 mSolverCounterUnsat, 3885 mSDtfsCounter, 8313 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 12935 GetRequests, 11415 SyntacticMatches, 33 SemanticMatches, 1487 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3975 ImplicationChecksByTransitivity, 14.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1019occurred in iteration=63, InterpolantAutomatonStates: 1260, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 7.4s AutomataMinimizationTime, 63 MinimizatonAttempts, 871 StatesRemovedByMinimization, 42 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-19 10:42:37,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...