/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 21:34:46,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 21:34:46,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 21:34:46,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 21:34:46,319 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 21:34:46,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 21:34:46,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 21:34:46,323 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 21:34:46,325 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 21:34:46,326 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 21:34:46,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 21:34:46,328 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 21:34:46,328 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 21:34:46,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 21:34:46,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 21:34:46,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 21:34:46,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 21:34:46,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 21:34:46,334 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 21:34:46,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 21:34:46,337 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 21:34:46,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 21:34:46,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 21:34:46,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 21:34:46,342 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 21:34:46,345 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 21:34:46,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 21:34:46,353 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 21:34:46,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 21:34:46,355 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 21:34:46,393 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 21:34:46,394 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 21:34:46,395 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 21:34:46,395 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 21:34:46,395 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 21:34:46,396 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 21:34:46,396 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 21:34:46,396 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 21:34:46,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 21:34:46,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 21:34:46,397 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 21:34:46,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 21:34:46,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 21:34:46,397 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 21:34:46,397 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 21:34:46,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 21:34:46,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 21:34:46,398 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 21:34:46,398 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 21:34:46,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 21:34:46,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 21:34:46,399 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 21:34:46,399 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 21:34:46,399 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 21:34:46,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 21:34:46,399 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 21:34:46,400 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 21:34:46,400 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 21:34:46,401 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 21:34:46,401 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 21:34:46,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 21:34:46,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 21:34:46,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 21:34:46,673 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 21:34:46,674 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 21:34:46,675 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c [2022-03-17 21:34:46,733 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d26cf6e8/d0dcdf3d68a94ca4888554e5418b5e21/FLAGb99c665a2 [2022-03-17 21:34:47,118 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 21:34:47,119 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c [2022-03-17 21:34:47,125 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d26cf6e8/d0dcdf3d68a94ca4888554e5418b5e21/FLAGb99c665a2 [2022-03-17 21:34:47,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d26cf6e8/d0dcdf3d68a94ca4888554e5418b5e21 [2022-03-17 21:34:47,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 21:34:47,514 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 21:34:47,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 21:34:47,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 21:34:47,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 21:34:47,523 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 09:34:47" (1/1) ... [2022-03-17 21:34:47,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bb59a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:34:47, skipping insertion in model container [2022-03-17 21:34:47,525 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 09:34:47" (1/1) ... [2022-03-17 21:34:47,531 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 21:34:47,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 21:34:47,736 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/egcd3-ll_valuebound5.c[490,503] [2022-03-17 21:34:47,772 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 21:34:47,783 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 21:34:47,794 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/egcd3-ll_valuebound5.c[490,503] [2022-03-17 21:34:47,817 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 21:34:47,831 INFO L208 MainTranslator]: Completed translation [2022-03-17 21:34:47,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:34:47 WrapperNode [2022-03-17 21:34:47,832 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 21:34:47,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 21:34:47,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 21:34:47,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 21:34:47,843 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:34:47" (1/1) ... [2022-03-17 21:34:47,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:34:47" (1/1) ... [2022-03-17 21:34:47,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:34:47" (1/1) ... [2022-03-17 21:34:47,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:34:47" (1/1) ... [2022-03-17 21:34:47,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:34:47" (1/1) ... [2022-03-17 21:34:47,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:34:47" (1/1) ... [2022-03-17 21:34:47,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:34:47" (1/1) ... [2022-03-17 21:34:47,877 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 21:34:47,878 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 21:34:47,878 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 21:34:47,878 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 21:34:47,879 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:34:47" (1/1) ... [2022-03-17 21:34:47,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 21:34:47,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:34:47,908 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) [2022-03-17 21:34:47,923 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 [2022-03-17 21:34:47,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 21:34:47,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 21:34:47,948 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 21:34:47,948 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 21:34:47,949 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 21:34:47,949 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 21:34:47,949 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 21:34:47,950 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 21:34:47,950 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 21:34:47,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 21:34:47,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 21:34:47,950 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 21:34:47,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 21:34:47,951 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 21:34:47,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 21:34:47,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 21:34:47,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 21:34:47,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 21:34:47,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 21:34:47,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 21:34:48,013 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 21:34:48,014 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 21:34:48,189 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 21:34:48,194 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 21:34:48,194 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-17 21:34:48,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 09:34:48 BoogieIcfgContainer [2022-03-17 21:34:48,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 21:34:48,196 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 21:34:48,197 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 21:34:48,197 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 21:34:48,200 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 09:34:48" (1/1) ... [2022-03-17 21:34:48,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 09:34:48 BasicIcfg [2022-03-17 21:34:48,231 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 21:34:48,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 21:34:48,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 21:34:48,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 21:34:48,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 09:34:47" (1/4) ... [2022-03-17 21:34:48,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@762cf546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 09:34:48, skipping insertion in model container [2022-03-17 21:34:48,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:34:47" (2/4) ... [2022-03-17 21:34:48,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@762cf546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 09:34:48, skipping insertion in model container [2022-03-17 21:34:48,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 09:34:48" (3/4) ... [2022-03-17 21:34:48,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@762cf546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 09:34:48, skipping insertion in model container [2022-03-17 21:34:48,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 09:34:48" (4/4) ... [2022-03-17 21:34:48,252 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound5.cqvasr [2022-03-17 21:34:48,256 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 21:34:48,256 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 21:34:48,312 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 21:34:48,322 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2022-03-17 21:34:48,322 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 21:34:48,340 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-17 21:34:48,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-17 21:34:48,345 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:34:48,346 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:34:48,347 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:34:48,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:34:48,351 INFO L85 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2022-03-17 21:34:48,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:34:48,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456926966] [2022-03-17 21:34:48,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:34:48,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:34:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:34:48,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 21:34:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:34:48,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 21:34:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:34:48,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 21:34:48,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:34:48,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 21:34:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:34:48,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-17 21:34:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:34:48,530 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 21:34:48,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:34:48,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456926966] [2022-03-17 21:34:48,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456926966] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:34:48,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:34:48,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 21:34:48,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949538898] [2022-03-17 21:34:48,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:34:48,537 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 21:34:48,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:34:48,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 21:34:48,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 21:34:48,560 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 21:34:48,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:34:48,645 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2022-03-17 21:34:48,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 21:34:48,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-17 21:34:48,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:34:48,653 INFO L225 Difference]: With dead ends: 73 [2022-03-17 21:34:48,654 INFO L226 Difference]: Without dead ends: 35 [2022-03-17 21:34:48,657 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 21:34:48,665 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:34:48,667 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:34:48,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-17 21:34:48,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-17 21:34:48,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 21:34:48,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-17 21:34:48,705 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-03-17 21:34:48,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:34:48,705 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-17 21:34:48,705 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 21:34:48,705 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-17 21:34:48,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-17 21:34:48,707 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:34:48,707 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:34:48,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 21:34:48,708 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:34:48,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:34:48,708 INFO L85 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2022-03-17 21:34:48,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:34:48,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081638947] [2022-03-17 21:34:48,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:34:48,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:34:48,729 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:34:48,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983998063] [2022-03-17 21:34:48,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:34:48,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:34:48,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:34:48,732 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) [2022-03-17 21:34:48,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 21:34:48,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:34:48,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 21:34:48,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:34:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 21:34:48,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:34:48,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:34:48,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081638947] [2022-03-17 21:34:48,928 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:34:48,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983998063] [2022-03-17 21:34:48,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983998063] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:34:48,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:34:48,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 21:34:48,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916761076] [2022-03-17 21:34:48,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:34:48,930 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 21:34:48,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:34:48,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 21:34:48,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 21:34:48,931 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 21:34:49,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:34:49,027 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-03-17 21:34:49,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 21:34:49,029 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-03-17 21:34:49,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:34:49,031 INFO L225 Difference]: With dead ends: 54 [2022-03-17 21:34:49,031 INFO L226 Difference]: Without dead ends: 47 [2022-03-17 21:34:49,031 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-17 21:34:49,032 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:34:49,033 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 155 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:34:49,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-17 21:34:49,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-03-17 21:34:49,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 21:34:49,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-17 21:34:49,042 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2022-03-17 21:34:49,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:34:49,044 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-17 21:34:49,045 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 21:34:49,045 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-17 21:34:49,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-17 21:34:49,047 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:34:49,047 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-03-17 21:34:49,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 21:34:49,278 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:34:49,279 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:34:49,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:34:49,279 INFO L85 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2022-03-17 21:34:49,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:34:49,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169683990] [2022-03-17 21:34:49,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:34:49,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:34:49,314 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:34:49,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085350038] [2022-03-17 21:34:49,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:34:49,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:34:49,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:34:49,317 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) [2022-03-17 21:34:49,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 21:34:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:34:49,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-17 21:34:49,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:34:49,640 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 21:34:49,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:34:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 21:34:49,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:34:49,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169683990] [2022-03-17 21:34:49,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:34:49,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085350038] [2022-03-17 21:34:49,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085350038] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 21:34:49,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:34:49,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-17 21:34:49,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588133382] [2022-03-17 21:34:49,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:34:49,762 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:34:49,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:34:49,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:34:49,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-17 21:34:49,763 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 21:34:49,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:34:49,801 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2022-03-17 21:34:49,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:34:49,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 37 [2022-03-17 21:34:49,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:34:49,803 INFO L225 Difference]: With dead ends: 53 [2022-03-17 21:34:49,803 INFO L226 Difference]: Without dead ends: 51 [2022-03-17 21:34:49,803 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-17 21:34:49,805 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 9 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:34:49,805 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 161 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:34:49,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-17 21:34:49,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-17 21:34:49,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-17 21:34:49,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-17 21:34:49,833 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2022-03-17 21:34:49,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:34:49,833 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-17 21:34:49,833 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 21:34:49,834 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-17 21:34:49,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-17 21:34:49,835 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:34:49,835 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-03-17 21:34:49,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 21:34:50,035 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,SelfDestructingSolverStorable2 [2022-03-17 21:34:50,036 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:34:50,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:34:50,036 INFO L85 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2022-03-17 21:34:50,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:34:50,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833741761] [2022-03-17 21:34:50,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:34:50,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:34:50,053 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:34:50,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490943513] [2022-03-17 21:34:50,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:34:50,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:34:50,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:34:50,055 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) [2022-03-17 21:34:50,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 21:34:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:34:50,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 21:34:50,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:34:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 21:34:50,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:34:50,294 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 21:34:50,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:34:50,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833741761] [2022-03-17 21:34:50,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:34:50,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490943513] [2022-03-17 21:34:50,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490943513] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:34:50,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:34:50,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-17 21:34:50,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833839747] [2022-03-17 21:34:50,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:34:50,296 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 21:34:50,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:34:50,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 21:34:50,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-17 21:34:50,297 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 21:34:50,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:34:50,464 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2022-03-17 21:34:50,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 21:34:50,464 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-17 21:34:50,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:34:50,466 INFO L225 Difference]: With dead ends: 103 [2022-03-17 21:34:50,466 INFO L226 Difference]: Without dead ends: 96 [2022-03-17 21:34:50,467 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-17 21:34:50,468 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 58 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:34:50,468 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 295 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:34:50,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-17 21:34:50,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-03-17 21:34:50,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-17 21:34:50,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-03-17 21:34:50,484 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-03-17 21:34:50,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:34:50,485 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-03-17 21:34:50,485 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 21:34:50,485 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-03-17 21:34:50,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-17 21:34:50,486 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:34:50,486 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-03-17 21:34:50,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 21:34:50,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:34:50,695 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:34:50,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:34:50,696 INFO L85 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2022-03-17 21:34:50,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:34:50,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309945833] [2022-03-17 21:34:50,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:34:50,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:34:50,709 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:34:50,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074079773] [2022-03-17 21:34:50,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:34:50,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:34:50,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:34:50,711 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) [2022-03-17 21:34:50,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 21:34:50,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:34:50,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-17 21:34:50,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:34:51,101 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 21:34:51,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:34:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 21:34:51,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:34:51,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309945833] [2022-03-17 21:34:51,294 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:34:51,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074079773] [2022-03-17 21:34:51,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074079773] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 21:34:51,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:34:51,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2022-03-17 21:34:51,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88823404] [2022-03-17 21:34:51,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:34:51,295 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-17 21:34:51,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:34:51,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-17 21:34:51,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-17 21:34:51,296 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-17 21:34:51,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:34:51,358 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2022-03-17 21:34:51,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 21:34:51,358 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-03-17 21:34:51,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:34:51,363 INFO L225 Difference]: With dead ends: 79 [2022-03-17 21:34:51,364 INFO L226 Difference]: Without dead ends: 77 [2022-03-17 21:34:51,364 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-17 21:34:51,365 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 27 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:34:51,366 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 192 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:34:51,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-17 21:34:51,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-03-17 21:34:51,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-17 21:34:51,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2022-03-17 21:34:51,383 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2022-03-17 21:34:51,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:34:51,384 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2022-03-17 21:34:51,384 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-17 21:34:51,384 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2022-03-17 21:34:51,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-17 21:34:51,385 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:34:51,385 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-03-17 21:34:51,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 21:34:51,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:34:51,599 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:34:51,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:34:51,600 INFO L85 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2022-03-17 21:34:51,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:34:51,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006252988] [2022-03-17 21:34:51,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:34:51,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:34:51,612 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:34:51,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800377560] [2022-03-17 21:34:51,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:34:51,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:34:51,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:34:51,617 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) [2022-03-17 21:34:51,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 21:34:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:34:51,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-17 21:34:51,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:34:51,995 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 21:34:51,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:34:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 21:34:52,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:34:52,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006252988] [2022-03-17 21:34:52,166 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:34:52,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800377560] [2022-03-17 21:34:52,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800377560] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:34:52,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:34:52,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2022-03-17 21:34:52,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853922687] [2022-03-17 21:34:52,167 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:34:52,168 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-17 21:34:52,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:34:52,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-17 21:34:52,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-17 21:34:52,169 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-17 21:34:52,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:34:52,711 INFO L93 Difference]: Finished difference Result 118 states and 159 transitions. [2022-03-17 21:34:52,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-17 21:34:52,712 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 42 [2022-03-17 21:34:52,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:34:52,713 INFO L225 Difference]: With dead ends: 118 [2022-03-17 21:34:52,713 INFO L226 Difference]: Without dead ends: 116 [2022-03-17 21:34:52,714 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-03-17 21:34:52,715 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 106 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 21:34:52,715 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 347 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 21:34:52,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-17 21:34:52,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2022-03-17 21:34:52,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-17 21:34:52,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2022-03-17 21:34:52,734 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2022-03-17 21:34:52,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:34:52,734 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2022-03-17 21:34:52,735 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-17 21:34:52,735 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2022-03-17 21:34:52,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-17 21:34:52,736 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:34:52,736 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:34:52,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 21:34:52,958 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:34:52,959 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:34:52,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:34:52,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2022-03-17 21:34:52,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:34:52,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811098679] [2022-03-17 21:34:52,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:34:52,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:34:52,970 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:34:52,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1000282129] [2022-03-17 21:34:52,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:34:52,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:34:52,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:34:52,972 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) [2022-03-17 21:34:52,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 21:34:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:34:53,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 21:34:53,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:34:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-17 21:34:53,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:34:53,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:34:53,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811098679] [2022-03-17 21:34:53,154 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:34:53,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000282129] [2022-03-17 21:34:53,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000282129] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:34:53,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:34:53,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 21:34:53,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329897832] [2022-03-17 21:34:53,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:34:53,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:34:53,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:34:53,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:34:53,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:34:53,155 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 21:34:53,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:34:53,229 INFO L93 Difference]: Finished difference Result 151 states and 213 transitions. [2022-03-17 21:34:53,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:34:53,233 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-03-17 21:34:53,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:34:53,235 INFO L225 Difference]: With dead ends: 151 [2022-03-17 21:34:53,235 INFO L226 Difference]: Without dead ends: 149 [2022-03-17 21:34:53,235 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 21:34:53,236 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:34:53,236 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 151 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:34:53,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-17 21:34:53,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2022-03-17 21:34:53,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 89 states have internal predecessors, (113), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-03-17 21:34:53,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2022-03-17 21:34:53,263 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 47 [2022-03-17 21:34:53,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:34:53,263 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2022-03-17 21:34:53,263 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 21:34:53,263 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2022-03-17 21:34:53,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-17 21:34:53,265 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:34:53,265 INFO L500 BasicCegarLoop]: trace histogram [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, 1, 1] [2022-03-17 21:34:53,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 21:34:53,478 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:34:53,479 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:34:53,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:34:53,479 INFO L85 PathProgramCache]: Analyzing trace with hash -846684234, now seen corresponding path program 1 times [2022-03-17 21:34:53,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:34:53,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187320170] [2022-03-17 21:34:53,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:34:53,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:34:53,490 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:34:53,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1893477630] [2022-03-17 21:34:53,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:34:53,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:34:53,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:34:53,492 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) [2022-03-17 21:34:53,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 21:34:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:34:53,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-17 21:34:53,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:34:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 21:34:53,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:34:54,149 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 21:34:54,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:34:54,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187320170] [2022-03-17 21:34:54,150 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:34:54,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893477630] [2022-03-17 21:34:54,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893477630] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:34:54,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:34:54,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 16 [2022-03-17 21:34:54,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41866940] [2022-03-17 21:34:54,150 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:34:54,151 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-17 21:34:54,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:34:54,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-17 21:34:54,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-17 21:34:54,152 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 13 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-17 21:34:55,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:34:55,189 INFO L93 Difference]: Finished difference Result 221 states and 311 transitions. [2022-03-17 21:34:55,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-17 21:34:55,190 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 13 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 47 [2022-03-17 21:34:55,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:34:55,193 INFO L225 Difference]: With dead ends: 221 [2022-03-17 21:34:55,193 INFO L226 Difference]: Without dead ends: 219 [2022-03-17 21:34:55,194 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-03-17 21:34:55,195 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 135 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-17 21:34:55,195 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 378 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 446 Invalid, 0 Unknown, 73 Unchecked, 0.4s Time] [2022-03-17 21:34:55,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-03-17 21:34:55,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 203. [2022-03-17 21:34:55,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 131 states have (on average 1.2748091603053435) internal successors, (167), 136 states have internal predecessors, (167), 61 states have call successors, (61), 11 states have call predecessors, (61), 10 states have return successors, (59), 55 states have call predecessors, (59), 59 states have call successors, (59) [2022-03-17 21:34:55,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 287 transitions. [2022-03-17 21:34:55,229 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 287 transitions. Word has length 47 [2022-03-17 21:34:55,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:34:55,229 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 287 transitions. [2022-03-17 21:34:55,230 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 13 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-17 21:34:55,230 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 287 transitions. [2022-03-17 21:34:55,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-17 21:34:55,231 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:34:55,231 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:34:55,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 21:34:55,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:34:55,440 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:34:55,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:34:55,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1679656732, now seen corresponding path program 2 times [2022-03-17 21:34:55,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:34:55,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671582258] [2022-03-17 21:34:55,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:34:55,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:34:55,451 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:34:55,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [872881284] [2022-03-17 21:34:55,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 21:34:55,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:34:55,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:34:55,453 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) [2022-03-17 21:34:55,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 21:34:55,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 21:34:55,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:34:55,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 21:34:55,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:34:55,559 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 21:34:55,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:34:55,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:34:55,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671582258] [2022-03-17 21:34:55,560 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:34:55,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872881284] [2022-03-17 21:34:55,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872881284] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:34:55,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:34:55,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 21:34:55,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824066392] [2022-03-17 21:34:55,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:34:55,560 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:34:55,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:34:55,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:34:55,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:34:55,561 INFO L87 Difference]: Start difference. First operand 203 states and 287 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 21:34:55,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:34:55,643 INFO L93 Difference]: Finished difference Result 258 states and 362 transitions. [2022-03-17 21:34:55,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 21:34:55,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2022-03-17 21:34:55,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:34:55,645 INFO L225 Difference]: With dead ends: 258 [2022-03-17 21:34:55,645 INFO L226 Difference]: Without dead ends: 168 [2022-03-17 21:34:55,646 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-17 21:34:55,647 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:34:55,647 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 180 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:34:55,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-03-17 21:34:55,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 140. [2022-03-17 21:34:55,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 89 states have internal predecessors, (100), 45 states have call successors, (45), 11 states have call predecessors, (45), 10 states have return successors, (43), 39 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-17 21:34:55,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 188 transitions. [2022-03-17 21:34:55,689 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 188 transitions. Word has length 47 [2022-03-17 21:34:55,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:34:55,690 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 188 transitions. [2022-03-17 21:34:55,690 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 21:34:55,690 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 188 transitions. [2022-03-17 21:34:55,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-17 21:34:55,691 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:34:55,691 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:34:55,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 21:34:55,900 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,SelfDestructingSolverStorable8 [2022-03-17 21:34:55,901 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:34:55,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:34:55,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2022-03-17 21:34:55,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:34:55,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185038593] [2022-03-17 21:34:55,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:34:55,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:34:55,911 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:34:55,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996766628] [2022-03-17 21:34:55,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:34:55,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:34:55,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:34:55,912 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) [2022-03-17 21:34:55,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 21:34:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:34:55,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 21:34:55,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:34:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-17 21:34:56,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:34:56,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:34:56,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185038593] [2022-03-17 21:34:56,066 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:34:56,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996766628] [2022-03-17 21:34:56,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996766628] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:34:56,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:34:56,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 21:34:56,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634420396] [2022-03-17 21:34:56,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:34:56,068 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:34:56,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:34:56,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:34:56,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:34:56,068 INFO L87 Difference]: Start difference. First operand 140 states and 188 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-17 21:34:56,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:34:56,153 INFO L93 Difference]: Finished difference Result 198 states and 283 transitions. [2022-03-17 21:34:56,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:34:56,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-03-17 21:34:56,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:34:56,156 INFO L225 Difference]: With dead ends: 198 [2022-03-17 21:34:56,156 INFO L226 Difference]: Without dead ends: 196 [2022-03-17 21:34:56,159 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 21:34:56,160 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:34:56,160 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 162 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:34:56,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-03-17 21:34:56,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 174. [2022-03-17 21:34:56,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 91 states have (on average 1.1758241758241759) internal successors, (107), 100 states have internal predecessors, (107), 71 states have call successors, (71), 12 states have call predecessors, (71), 11 states have return successors, (69), 61 states have call predecessors, (69), 69 states have call successors, (69) [2022-03-17 21:34:56,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 247 transitions. [2022-03-17 21:34:56,190 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 247 transitions. Word has length 52 [2022-03-17 21:34:56,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:34:56,191 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 247 transitions. [2022-03-17 21:34:56,191 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-17 21:34:56,191 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 247 transitions. [2022-03-17 21:34:56,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-17 21:34:56,192 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:34:56,192 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2022-03-17 21:34:56,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 21:34:56,414 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-17 21:34:56,415 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:34:56,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:34:56,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2022-03-17 21:34:56,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:34:56,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865446794] [2022-03-17 21:34:56,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:34:56,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:34:56,426 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:34:56,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1188192030] [2022-03-17 21:34:56,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:34:56,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:34:56,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:34:56,428 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) [2022-03-17 21:34:56,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 21:34:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:34:56,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-17 21:34:56,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:34:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-17 21:34:57,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:34:57,567 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-17 21:34:57,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:34:57,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865446794] [2022-03-17 21:34:57,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:34:57,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188192030] [2022-03-17 21:34:57,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188192030] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:34:57,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:34:57,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2022-03-17 21:34:57,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582459140] [2022-03-17 21:34:57,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:34:57,569 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-17 21:34:57,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:34:57,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-17 21:34:57,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-17 21:34:57,570 INFO L87 Difference]: Start difference. First operand 174 states and 247 transitions. Second operand has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-17 21:35:03,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:35:03,284 INFO L93 Difference]: Finished difference Result 337 states and 496 transitions. [2022-03-17 21:35:03,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-17 21:35:03,285 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 64 [2022-03-17 21:35:03,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:35:03,288 INFO L225 Difference]: With dead ends: 337 [2022-03-17 21:35:03,288 INFO L226 Difference]: Without dead ends: 333 [2022-03-17 21:35:03,288 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2022-03-17 21:35:03,289 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 130 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-03-17 21:35:03,289 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 554 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-03-17 21:35:03,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-03-17 21:35:03,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 273. [2022-03-17 21:35:03,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 158 states have (on average 1.2025316455696202) internal successors, (190), 166 states have internal predecessors, (190), 99 states have call successors, (99), 16 states have call predecessors, (99), 15 states have return successors, (97), 90 states have call predecessors, (97), 97 states have call successors, (97) [2022-03-17 21:35:03,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 386 transitions. [2022-03-17 21:35:03,360 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 386 transitions. Word has length 64 [2022-03-17 21:35:03,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:35:03,360 INFO L478 AbstractCegarLoop]: Abstraction has 273 states and 386 transitions. [2022-03-17 21:35:03,361 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-17 21:35:03,361 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 386 transitions. [2022-03-17 21:35:03,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-17 21:35:03,362 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:35:03,362 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 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] [2022-03-17 21:35:03,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-17 21:35:03,575 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,SelfDestructingSolverStorable10 [2022-03-17 21:35:03,575 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:35:03,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:35:03,576 INFO L85 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2022-03-17 21:35:03,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:35:03,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920146402] [2022-03-17 21:35:03,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:03,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:35:03,588 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:35:03,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410866201] [2022-03-17 21:35:03,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:03,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:35:03,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:35:03,593 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) [2022-03-17 21:35:03,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-17 21:35:03,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:35:03,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-17 21:35:03,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:35:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-03-17 21:35:04,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:35:04,259 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-03-17 21:35:04,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:35:04,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920146402] [2022-03-17 21:35:04,259 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:35:04,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410866201] [2022-03-17 21:35:04,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410866201] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 21:35:04,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:35:04,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 14 [2022-03-17 21:35:04,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143308115] [2022-03-17 21:35:04,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:35:04,260 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 21:35:04,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:35:04,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 21:35:04,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-03-17 21:35:04,261 INFO L87 Difference]: Start difference. First operand 273 states and 386 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-03-17 21:35:04,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:35:04,365 INFO L93 Difference]: Finished difference Result 279 states and 391 transitions. [2022-03-17 21:35:04,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:35:04,365 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2022-03-17 21:35:04,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:35:04,367 INFO L225 Difference]: With dead ends: 279 [2022-03-17 21:35:04,367 INFO L226 Difference]: Without dead ends: 277 [2022-03-17 21:35:04,368 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-03-17 21:35:04,368 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 13 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:35:04,368 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 145 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:35:04,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-03-17 21:35:04,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2022-03-17 21:35:04,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 161 states have (on average 1.1987577639751552) internal successors, (193), 169 states have internal predecessors, (193), 99 states have call successors, (99), 17 states have call predecessors, (99), 16 states have return successors, (97), 90 states have call predecessors, (97), 97 states have call successors, (97) [2022-03-17 21:35:04,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 389 transitions. [2022-03-17 21:35:04,434 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 389 transitions. Word has length 74 [2022-03-17 21:35:04,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:35:04,434 INFO L478 AbstractCegarLoop]: Abstraction has 277 states and 389 transitions. [2022-03-17 21:35:04,435 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-03-17 21:35:04,435 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 389 transitions. [2022-03-17 21:35:04,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-17 21:35:04,435 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:35:04,436 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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] [2022-03-17 21:35:04,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-17 21:35:04,649 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,SelfDestructingSolverStorable11 [2022-03-17 21:35:04,649 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:35:04,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:35:04,650 INFO L85 PathProgramCache]: Analyzing trace with hash -2010106522, now seen corresponding path program 1 times [2022-03-17 21:35:04,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:35:04,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606702902] [2022-03-17 21:35:04,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:04,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:35:04,657 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:35:04,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919594827] [2022-03-17 21:35:04,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:04,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:35:04,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:35:04,660 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) [2022-03-17 21:35:04,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-17 21:35:04,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:35:04,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-17 21:35:04,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:35:05,004 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-17 21:35:05,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:35:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-17 21:35:05,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:35:05,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606702902] [2022-03-17 21:35:05,185 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:35:05,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919594827] [2022-03-17 21:35:05,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919594827] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:35:05,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:35:05,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-03-17 21:35:05,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75416799] [2022-03-17 21:35:05,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:35:05,186 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-17 21:35:05,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:35:05,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-17 21:35:05,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-17 21:35:05,186 INFO L87 Difference]: Start difference. First operand 277 states and 389 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-17 21:35:05,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:35:05,610 INFO L93 Difference]: Finished difference Result 319 states and 450 transitions. [2022-03-17 21:35:05,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 21:35:05,611 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 72 [2022-03-17 21:35:05,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:35:05,615 INFO L225 Difference]: With dead ends: 319 [2022-03-17 21:35:05,616 INFO L226 Difference]: Without dead ends: 317 [2022-03-17 21:35:05,616 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-03-17 21:35:05,617 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 69 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 21:35:05,617 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 261 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 21:35:05,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-03-17 21:35:05,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 281. [2022-03-17 21:35:05,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 164 states have (on average 1.1951219512195121) internal successors, (196), 172 states have internal predecessors, (196), 99 states have call successors, (99), 18 states have call predecessors, (99), 17 states have return successors, (97), 90 states have call predecessors, (97), 97 states have call successors, (97) [2022-03-17 21:35:05,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 392 transitions. [2022-03-17 21:35:05,690 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 392 transitions. Word has length 72 [2022-03-17 21:35:05,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:35:05,690 INFO L478 AbstractCegarLoop]: Abstraction has 281 states and 392 transitions. [2022-03-17 21:35:05,690 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-17 21:35:05,691 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 392 transitions. [2022-03-17 21:35:05,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-17 21:35:05,691 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:35:05,692 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:35:05,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-17 21:35:05,899 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,SelfDestructingSolverStorable12 [2022-03-17 21:35:05,899 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:35:05,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:35:05,900 INFO L85 PathProgramCache]: Analyzing trace with hash 857620825, now seen corresponding path program 2 times [2022-03-17 21:35:05,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:35:05,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912797207] [2022-03-17 21:35:05,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:05,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:35:05,909 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:35:05,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738684932] [2022-03-17 21:35:05,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 21:35:05,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:35:05,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:35:05,910 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) [2022-03-17 21:35:05,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-17 21:35:05,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 21:35:05,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:35:05,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-17 21:35:05,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:35:06,066 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-17 21:35:06,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:35:06,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:35:06,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912797207] [2022-03-17 21:35:06,067 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:35:06,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738684932] [2022-03-17 21:35:06,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738684932] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:35:06,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:35:06,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 21:35:06,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091275750] [2022-03-17 21:35:06,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:35:06,069 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:35:06,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:35:06,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:35:06,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:35:06,070 INFO L87 Difference]: Start difference. First operand 281 states and 392 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-17 21:35:06,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:35:06,184 INFO L93 Difference]: Finished difference Result 489 states and 678 transitions. [2022-03-17 21:35:06,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 21:35:06,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2022-03-17 21:35:06,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:35:06,186 INFO L225 Difference]: With dead ends: 489 [2022-03-17 21:35:06,186 INFO L226 Difference]: Without dead ends: 294 [2022-03-17 21:35:06,188 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-17 21:35:06,189 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:35:06,189 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 148 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:35:06,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-03-17 21:35:06,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 279. [2022-03-17 21:35:06,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 170 states have (on average 1.188235294117647) internal successors, (202), 171 states have internal predecessors, (202), 91 states have call successors, (91), 18 states have call predecessors, (91), 17 states have return successors, (89), 89 states have call predecessors, (89), 89 states have call successors, (89) [2022-03-17 21:35:06,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 382 transitions. [2022-03-17 21:35:06,243 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 382 transitions. Word has length 77 [2022-03-17 21:35:06,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:35:06,243 INFO L478 AbstractCegarLoop]: Abstraction has 279 states and 382 transitions. [2022-03-17 21:35:06,244 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-17 21:35:06,244 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 382 transitions. [2022-03-17 21:35:06,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-17 21:35:06,245 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:35:06,245 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:35:06,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-17 21:35:06,470 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,SelfDestructingSolverStorable13 [2022-03-17 21:35:06,470 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:35:06,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:35:06,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1988197843, now seen corresponding path program 3 times [2022-03-17 21:35:06,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:35:06,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662659212] [2022-03-17 21:35:06,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:06,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:35:06,479 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:35:06,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [852556540] [2022-03-17 21:35:06,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 21:35:06,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:35:06,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:35:06,481 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) [2022-03-17 21:35:06,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-17 21:35:06,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-17 21:35:06,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:35:06,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-17 21:35:06,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:35:07,240 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-17 21:35:07,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:35:08,541 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-17 21:35:08,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:35:08,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662659212] [2022-03-17 21:35:08,542 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:35:08,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852556540] [2022-03-17 21:35:08,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852556540] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:35:08,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:35:08,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2022-03-17 21:35:08,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754153464] [2022-03-17 21:35:08,542 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:35:08,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-17 21:35:08,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:35:08,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-17 21:35:08,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2022-03-17 21:35:08,544 INFO L87 Difference]: Start difference. First operand 279 states and 382 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-17 21:35:19,581 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 [] [2022-03-17 21:35:30,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:35:30,520 INFO L93 Difference]: Finished difference Result 421 states and 574 transitions. [2022-03-17 21:35:30,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-17 21:35:30,520 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 77 [2022-03-17 21:35:30,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:35:30,522 INFO L225 Difference]: With dead ends: 421 [2022-03-17 21:35:30,522 INFO L226 Difference]: Without dead ends: 419 [2022-03-17 21:35:30,523 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=692, Invalid=2388, Unknown=0, NotChecked=0, Total=3080 [2022-03-17 21:35:30,524 INFO L912 BasicCegarLoop]: 76 mSDtfsCounter, 228 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 375 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-03-17 21:35:30,524 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 646 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 1031 Invalid, 1 Unknown, 0 Unchecked, 9.8s Time] [2022-03-17 21:35:30,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-03-17 21:35:30,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 357. [2022-03-17 21:35:30,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 219 states have (on average 1.187214611872146) internal successors, (260), 220 states have internal predecessors, (260), 115 states have call successors, (115), 23 states have call predecessors, (115), 22 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2022-03-17 21:35:30,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 488 transitions. [2022-03-17 21:35:30,627 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 488 transitions. Word has length 77 [2022-03-17 21:35:30,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:35:30,627 INFO L478 AbstractCegarLoop]: Abstraction has 357 states and 488 transitions. [2022-03-17 21:35:30,627 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-17 21:35:30,627 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 488 transitions. [2022-03-17 21:35:30,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-17 21:35:30,628 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:35:30,629 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 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, 1, 1, 1, 1, 1, 1] [2022-03-17 21:35:30,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-17 21:35:30,835 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:35:30,836 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:35:30,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:35:30,836 INFO L85 PathProgramCache]: Analyzing trace with hash -983010836, now seen corresponding path program 1 times [2022-03-17 21:35:30,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:35:30,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103429456] [2022-03-17 21:35:30,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:30,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:35:30,844 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:35:30,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85921231] [2022-03-17 21:35:30,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:30,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:35:30,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:35:30,845 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) [2022-03-17 21:35:30,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-17 21:35:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:35:30,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-17 21:35:30,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:35:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-17 21:35:31,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:35:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-03-17 21:35:33,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:35:33,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103429456] [2022-03-17 21:35:33,276 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:35:33,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85921231] [2022-03-17 21:35:33,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85921231] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:35:33,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:35:33,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2022-03-17 21:35:33,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649415492] [2022-03-17 21:35:33,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:35:33,277 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-17 21:35:33,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:35:33,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-17 21:35:33,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-03-17 21:35:33,278 INFO L87 Difference]: Start difference. First operand 357 states and 488 transitions. Second operand has 27 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2022-03-17 21:35:40,894 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:42,941 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:48,893 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:52,242 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:55,481 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:57,471 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:59,474 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:01,992 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:03,511 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:09,321 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:15,335 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:18,474 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:19,854 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:20,943 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:26,516 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:28,528 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:31,048 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:35,406 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:37,621 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:40,208 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:42,229 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:44,825 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:46,841 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:48,847 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:51,197 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:52,805 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:54,808 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:57,314 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:58,599 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:58,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:36:58,601 INFO L93 Difference]: Finished difference Result 652 states and 949 transitions. [2022-03-17 21:36:58,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-17 21:36:58,602 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) Word has length 91 [2022-03-17 21:36:58,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:36:58,605 INFO L225 Difference]: With dead ends: 652 [2022-03-17 21:36:58,605 INFO L226 Difference]: Without dead ends: 648 [2022-03-17 21:36:58,607 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3135 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=1765, Invalid=7937, Unknown=0, NotChecked=0, Total=9702 [2022-03-17 21:36:58,607 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 186 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 1802 mSolverCounterSat, 463 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 2283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 1802 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.6s IncrementalHoareTripleChecker+Time [2022-03-17 21:36:58,608 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 757 Invalid, 2283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 1802 Invalid, 18 Unknown, 0 Unchecked, 64.6s Time] [2022-03-17 21:36:58,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-03-17 21:36:58,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 586. [2022-03-17 21:36:58,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 319 states have (on average 1.2413793103448276) internal successors, (396), 320 states have internal predecessors, (396), 239 states have call successors, (239), 28 states have call predecessors, (239), 27 states have return successors, (237), 237 states have call predecessors, (237), 237 states have call successors, (237) [2022-03-17 21:36:58,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 872 transitions. [2022-03-17 21:36:58,851 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 872 transitions. Word has length 91 [2022-03-17 21:36:58,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:36:58,851 INFO L478 AbstractCegarLoop]: Abstraction has 586 states and 872 transitions. [2022-03-17 21:36:58,851 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2022-03-17 21:36:58,851 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 872 transitions. [2022-03-17 21:36:58,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-17 21:36:58,853 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:36:58,853 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:36:58,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-17 21:36:59,062 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,SelfDestructingSolverStorable15 [2022-03-17 21:36:59,063 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:36:59,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:36:59,063 INFO L85 PathProgramCache]: Analyzing trace with hash 736682115, now seen corresponding path program 1 times [2022-03-17 21:36:59,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:36:59,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75229053] [2022-03-17 21:36:59,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:36:59,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:36:59,070 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:36:59,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1467235009] [2022-03-17 21:36:59,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:36:59,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:36:59,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:36:59,077 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) [2022-03-17 21:36:59,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-17 21:36:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:36:59,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-17 21:36:59,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:36:59,557 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-17 21:36:59,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:37:00,048 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-17 21:37:00,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:37:00,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75229053] [2022-03-17 21:37:00,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:37:00,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467235009] [2022-03-17 21:37:00,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467235009] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:37:00,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:37:00,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2022-03-17 21:37:00,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936319730] [2022-03-17 21:37:00,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:37:00,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-17 21:37:00,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:37:00,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-17 21:37:00,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-03-17 21:37:00,050 INFO L87 Difference]: Start difference. First operand 586 states and 872 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2022-03-17 21:37:02,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:37:02,707 INFO L93 Difference]: Finished difference Result 847 states and 1305 transitions. [2022-03-17 21:37:02,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-17 21:37:02,708 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) Word has length 94 [2022-03-17 21:37:02,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:37:02,712 INFO L225 Difference]: With dead ends: 847 [2022-03-17 21:37:02,712 INFO L226 Difference]: Without dead ends: 845 [2022-03-17 21:37:02,713 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=432, Invalid=1548, Unknown=0, NotChecked=0, Total=1980 [2022-03-17 21:37:02,713 INFO L912 BasicCegarLoop]: 88 mSDtfsCounter, 125 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-17 21:37:02,713 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 771 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 561 Invalid, 0 Unknown, 103 Unchecked, 1.4s Time] [2022-03-17 21:37:02,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-03-17 21:37:03,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 816. [2022-03-17 21:37:03,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 415 states have (on average 1.2843373493975903) internal successors, (533), 416 states have internal predecessors, (533), 371 states have call successors, (371), 30 states have call predecessors, (371), 29 states have return successors, (369), 369 states have call predecessors, (369), 369 states have call successors, (369) [2022-03-17 21:37:03,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1273 transitions. [2022-03-17 21:37:03,137 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1273 transitions. Word has length 94 [2022-03-17 21:37:03,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:37:03,138 INFO L478 AbstractCegarLoop]: Abstraction has 816 states and 1273 transitions. [2022-03-17 21:37:03,138 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2022-03-17 21:37:03,138 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1273 transitions. [2022-03-17 21:37:03,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-17 21:37:03,139 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:37:03,139 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 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, 1] [2022-03-17 21:37:03,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-17 21:37:03,362 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,SelfDestructingSolverStorable16 [2022-03-17 21:37:03,362 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:37:03,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:37:03,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1867259133, now seen corresponding path program 1 times [2022-03-17 21:37:03,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:37:03,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333682220] [2022-03-17 21:37:03,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:37:03,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:37:03,370 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:37:03,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [705137293] [2022-03-17 21:37:03,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:37:03,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:37:03,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:37:03,372 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) [2022-03-17 21:37:03,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-17 21:37:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:37:03,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-17 21:37:03,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:37:04,363 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 17 proven. 54 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-03-17 21:37:04,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:37:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 19 proven. 43 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-17 21:37:09,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:37:09,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333682220] [2022-03-17 21:37:09,734 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:37:09,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705137293] [2022-03-17 21:37:09,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705137293] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:37:09,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:37:09,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 28 [2022-03-17 21:37:09,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738298913] [2022-03-17 21:37:09,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:37:09,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-17 21:37:09,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:37:09,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-17 21:37:09,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2022-03-17 21:37:09,736 INFO L87 Difference]: Start difference. First operand 816 states and 1273 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 25 states have internal predecessors, (58), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 8 states have call predecessors, (27), 10 states have call successors, (27) [2022-03-17 21:37:17,723 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 [] [2022-03-17 21:37:19,730 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:37:21,799 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:37:25,769 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:37:31,380 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:37:33,383 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:37:35,396 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:37:40,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:37:40,294 INFO L93 Difference]: Finished difference Result 994 states and 1549 transitions. [2022-03-17 21:37:40,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-17 21:37:40,295 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 25 states have internal predecessors, (58), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 8 states have call predecessors, (27), 10 states have call successors, (27) Word has length 94 [2022-03-17 21:37:40,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:37:40,300 INFO L225 Difference]: With dead ends: 994 [2022-03-17 21:37:40,300 INFO L226 Difference]: Without dead ends: 992 [2022-03-17 21:37:40,301 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=783, Invalid=2757, Unknown=0, NotChecked=0, Total=3540 [2022-03-17 21:37:40,302 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 153 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 322 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.4s IncrementalHoareTripleChecker+Time [2022-03-17 21:37:40,302 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 598 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 1147 Invalid, 7 Unknown, 0 Unchecked, 21.4s Time] [2022-03-17 21:37:40,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2022-03-17 21:37:40,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 985. [2022-03-17 21:37:40,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 510 states have (on average 1.2843137254901962) internal successors, (655), 511 states have internal predecessors, (655), 443 states have call successors, (443), 32 states have call predecessors, (443), 31 states have return successors, (441), 441 states have call predecessors, (441), 441 states have call successors, (441) [2022-03-17 21:37:40,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1539 transitions. [2022-03-17 21:37:40,919 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1539 transitions. Word has length 94 [2022-03-17 21:37:40,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:37:40,923 INFO L478 AbstractCegarLoop]: Abstraction has 985 states and 1539 transitions. [2022-03-17 21:37:40,923 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 25 states have internal predecessors, (58), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 8 states have call predecessors, (27), 10 states have call successors, (27) [2022-03-17 21:37:40,923 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1539 transitions. [2022-03-17 21:37:40,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-17 21:37:40,924 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:37:40,925 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 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, 1, 1] [2022-03-17 21:37:40,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-17 21:37:41,139 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,SelfDestructingSolverStorable17 [2022-03-17 21:37:41,140 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:37:41,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:37:41,140 INFO L85 PathProgramCache]: Analyzing trace with hash -464781530, now seen corresponding path program 2 times [2022-03-17 21:37:41,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:37:41,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620011883] [2022-03-17 21:37:41,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:37:41,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:37:41,147 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:37:41,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653349146] [2022-03-17 21:37:41,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 21:37:41,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:37:41,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:37:41,149 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) [2022-03-17 21:37:41,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-17 21:37:41,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 21:37:41,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:37:41,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-17 21:37:41,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:37:41,367 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-03-17 21:37:41,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:37:41,510 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-03-17 21:37:41,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:37:41,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620011883] [2022-03-17 21:37:41,511 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:37:41,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653349146] [2022-03-17 21:37:41,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653349146] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:37:41,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:37:41,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2022-03-17 21:37:41,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117246309] [2022-03-17 21:37:41,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:37:41,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 21:37:41,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:37:41,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 21:37:41,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-17 21:37:41,513 INFO L87 Difference]: Start difference. First operand 985 states and 1539 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-17 21:37:42,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:37:42,477 INFO L93 Difference]: Finished difference Result 1137 states and 1770 transitions. [2022-03-17 21:37:42,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-17 21:37:42,478 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 99 [2022-03-17 21:37:42,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:37:42,483 INFO L225 Difference]: With dead ends: 1137 [2022-03-17 21:37:42,483 INFO L226 Difference]: Without dead ends: 1130 [2022-03-17 21:37:42,484 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2022-03-17 21:37:42,485 INFO L912 BasicCegarLoop]: 91 mSDtfsCounter, 65 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 21:37:42,485 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 495 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 21:37:42,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2022-03-17 21:37:43,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 937. [2022-03-17 21:37:43,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 474 states have (on average 1.2953586497890295) internal successors, (614), 475 states have internal predecessors, (614), 431 states have call successors, (431), 32 states have call predecessors, (431), 31 states have return successors, (429), 429 states have call predecessors, (429), 429 states have call successors, (429) [2022-03-17 21:37:43,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1474 transitions. [2022-03-17 21:37:43,081 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1474 transitions. Word has length 99 [2022-03-17 21:37:43,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:37:43,082 INFO L478 AbstractCegarLoop]: Abstraction has 937 states and 1474 transitions. [2022-03-17 21:37:43,082 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-17 21:37:43,083 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1474 transitions. [2022-03-17 21:37:43,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-17 21:37:43,084 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:37:43,084 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:37:43,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-17 21:37:43,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:37:43,299 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:37:43,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:37:43,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1112008279, now seen corresponding path program 2 times [2022-03-17 21:37:43,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:37:43,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838888214] [2022-03-17 21:37:43,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:37:43,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:37:43,313 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:37:43,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1994969973] [2022-03-17 21:37:43,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 21:37:43,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:37:43,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:37:43,316 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) [2022-03-17 21:37:43,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-17 21:37:43,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 21:37:43,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:37:43,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-17 21:37:43,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:37:44,415 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 21:37:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 90 proven. 42 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-17 21:37:44,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:37:45,499 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 21:37:45,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:37:45,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838888214] [2022-03-17 21:37:45,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:37:45,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994969973] [2022-03-17 21:37:45,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994969973] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 21:37:45,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:37:45,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-17 21:37:45,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137581127] [2022-03-17 21:37:45,950 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 21:37:45,950 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-17 21:37:45,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:37:45,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-17 21:37:45,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-17 21:37:45,951 INFO L87 Difference]: Start difference. First operand 937 states and 1474 transitions. Second operand has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-17 21:37:47,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:37:47,826 INFO L93 Difference]: Finished difference Result 1064 states and 1665 transitions. [2022-03-17 21:37:47,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-17 21:37:47,827 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 111 [2022-03-17 21:37:47,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:37:47,831 INFO L225 Difference]: With dead ends: 1064 [2022-03-17 21:37:47,831 INFO L226 Difference]: Without dead ends: 1057 [2022-03-17 21:37:47,832 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-03-17 21:37:47,832 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 60 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:37:47,833 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 502 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-17 21:37:47,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2022-03-17 21:37:48,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 1045. [2022-03-17 21:37:48,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 526 states have (on average 1.296577946768061) internal successors, (682), 527 states have internal predecessors, (682), 483 states have call successors, (483), 36 states have call predecessors, (483), 35 states have return successors, (481), 481 states have call predecessors, (481), 481 states have call successors, (481) [2022-03-17 21:37:48,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 1646 transitions. [2022-03-17 21:37:48,368 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 1646 transitions. Word has length 111 [2022-03-17 21:37:48,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:37:48,368 INFO L478 AbstractCegarLoop]: Abstraction has 1045 states and 1646 transitions. [2022-03-17 21:37:48,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-17 21:37:48,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 1646 transitions. [2022-03-17 21:37:48,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-17 21:37:48,370 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:37:48,370 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 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] [2022-03-17 21:37:48,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-17 21:37:48,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:37:48,595 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:37:48,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:37:48,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1586140833, now seen corresponding path program 2 times [2022-03-17 21:37:48,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:37:48,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946586015] [2022-03-17 21:37:48,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:37:48,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:37:48,603 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:37:48,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1184967826] [2022-03-17 21:37:48,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 21:37:48,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:37:48,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:37:48,605 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) [2022-03-17 21:37:48,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-17 21:37:48,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 21:37:48,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:37:48,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-17 21:37:48,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:37:49,195 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-03-17 21:37:49,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:37:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-03-17 21:37:50,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:37:50,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946586015] [2022-03-17 21:37:50,348 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:37:50,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184967826] [2022-03-17 21:37:50,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184967826] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:37:50,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:37:50,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2022-03-17 21:37:50,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619215022] [2022-03-17 21:37:50,348 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:37:50,348 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-17 21:37:50,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:37:50,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-17 21:37:50,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-03-17 21:37:50,349 INFO L87 Difference]: Start difference. First operand 1045 states and 1646 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 22 states have internal predecessors, (52), 11 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2022-03-17 21:37:57,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:37:57,112 INFO L93 Difference]: Finished difference Result 2469 states and 4083 transitions. [2022-03-17 21:37:57,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-17 21:37:57,113 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 22 states have internal predecessors, (52), 11 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) Word has length 121 [2022-03-17 21:37:57,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:37:57,123 INFO L225 Difference]: With dead ends: 2469 [2022-03-17 21:37:57,123 INFO L226 Difference]: Without dead ends: 2467 [2022-03-17 21:37:57,124 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 230 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=720, Invalid=2702, Unknown=0, NotChecked=0, Total=3422 [2022-03-17 21:37:57,125 INFO L912 BasicCegarLoop]: 98 mSDtfsCounter, 141 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-17 21:37:57,125 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 835 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 681 Invalid, 0 Unknown, 99 Unchecked, 1.8s Time] [2022-03-17 21:37:57,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2022-03-17 21:37:58,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 1898. [2022-03-17 21:37:58,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1898 states, 871 states have (on average 1.354764638346728) internal successors, (1180), 872 states have internal predecessors, (1180), 987 states have call successors, (987), 40 states have call predecessors, (987), 39 states have return successors, (985), 985 states have call predecessors, (985), 985 states have call successors, (985) [2022-03-17 21:37:58,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1898 states to 1898 states and 3152 transitions. [2022-03-17 21:37:58,262 INFO L78 Accepts]: Start accepts. Automaton has 1898 states and 3152 transitions. Word has length 121 [2022-03-17 21:37:58,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:37:58,262 INFO L478 AbstractCegarLoop]: Abstraction has 1898 states and 3152 transitions. [2022-03-17 21:37:58,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 22 states have internal predecessors, (52), 11 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2022-03-17 21:37:58,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1898 states and 3152 transitions. [2022-03-17 21:37:58,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-17 21:37:58,264 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:37:58,264 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2022-03-17 21:37:58,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-17 21:37:58,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-17 21:37:58,487 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:37:58,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:37:58,488 INFO L85 PathProgramCache]: Analyzing trace with hash -455563815, now seen corresponding path program 3 times [2022-03-17 21:37:58,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:37:58,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276372269] [2022-03-17 21:37:58,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:37:58,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:37:58,495 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:37:58,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952239844] [2022-03-17 21:37:58,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 21:37:58,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:37:58,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:37:58,497 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) [2022-03-17 21:37:58,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-17 21:37:58,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-17 21:37:58,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:37:58,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-17 21:37:58,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:37:59,113 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 21:37:59,115 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 21:38:14,537 WARN L232 SmtUtils]: Spent 13.69s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:38:44,695 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 21:38:44,699 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 21:38:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 102 proven. 30 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-17 21:38:50,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:39:09,184 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 90 proven. 30 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-17 21:39:09,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:39:09,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276372269] [2022-03-17 21:39:09,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:39:09,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952239844] [2022-03-17 21:39:09,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952239844] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:39:09,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:39:09,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2022-03-17 21:39:09,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028432546] [2022-03-17 21:39:09,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:39:09,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-17 21:39:09,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:39:09,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-17 21:39:09,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=424, Unknown=8, NotChecked=0, Total=506 [2022-03-17 21:39:09,186 INFO L87 Difference]: Start difference. First operand 1898 states and 3152 transitions. Second operand has 23 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2022-03-17 21:39:15,202 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:39:18,187 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:39:31,706 WARN L232 SmtUtils]: Spent 13.19s on a formula simplification. DAG size of input: 63 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:39:46,133 WARN L232 SmtUtils]: Spent 12.32s on a formula simplification. DAG size of input: 77 DAG size of output: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:39:48,135 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:40:04,736 WARN L232 SmtUtils]: Spent 16.42s on a formula simplification. DAG size of input: 89 DAG size of output: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:40:06,741 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:40:32,169 WARN L232 SmtUtils]: Spent 25.06s on a formula simplification. DAG size of input: 104 DAG size of output: 82 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:40:34,255 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:40:46,266 WARN L232 SmtUtils]: Spent 10.85s on a formula simplification. DAG size of input: 80 DAG size of output: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:40:49,846 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:40:51,227 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:40:53,445 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:40:56,926 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:40:58,426 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:41:00,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:41:00,440 INFO L93 Difference]: Finished difference Result 2170 states and 3602 transitions. [2022-03-17 21:41:00,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-17 21:41:00,441 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) Word has length 121 [2022-03-17 21:41:00,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:41:00,451 INFO L225 Difference]: With dead ends: 2170 [2022-03-17 21:41:00,451 INFO L226 Difference]: Without dead ends: 2166 [2022-03-17 21:41:00,453 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 217 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 117.4s TimeCoverageRelationStatistics Valid=350, Invalid=1447, Unknown=9, NotChecked=0, Total=1806 [2022-03-17 21:41:00,453 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 127 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 245 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:41:00,454 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 511 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 580 Invalid, 5 Unknown, 0 Unchecked, 27.0s Time] [2022-03-17 21:41:00,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2022-03-17 21:41:01,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 1900. [2022-03-17 21:41:01,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 873 states have (on average 1.3528064146620848) internal successors, (1181), 873 states have internal predecessors, (1181), 987 states have call successors, (987), 41 states have call predecessors, (987), 39 states have return successors, (985), 985 states have call predecessors, (985), 985 states have call successors, (985) [2022-03-17 21:41:01,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 3153 transitions. [2022-03-17 21:41:01,643 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 3153 transitions. Word has length 121 [2022-03-17 21:41:01,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:41:01,644 INFO L478 AbstractCegarLoop]: Abstraction has 1900 states and 3153 transitions. [2022-03-17 21:41:01,644 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2022-03-17 21:41:01,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 3153 transitions. [2022-03-17 21:41:01,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-17 21:41:01,646 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:41:01,646 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-17 21:41:01,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-17 21:41:01,846 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-17 21:41:01,846 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:41:01,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:41:01,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1630901606, now seen corresponding path program 3 times [2022-03-17 21:41:01,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:41:01,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257308284] [2022-03-17 21:41:01,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:41:01,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:41:01,855 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:41:01,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [440037118] [2022-03-17 21:41:01,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 21:41:01,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:41:01,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:41:01,857 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) [2022-03-17 21:41:01,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-17 21:41:01,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-17 21:41:01,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:41:01,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-17 21:41:01,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:41:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 152 proven. 45 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2022-03-17 21:41:04,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:41:09,549 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 21:44:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 140 proven. 48 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2022-03-17 21:44:41,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:44:41,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257308284] [2022-03-17 21:44:41,044 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:44:41,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440037118] [2022-03-17 21:44:41,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440037118] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:44:41,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:44:41,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 35 [2022-03-17 21:44:41,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954854103] [2022-03-17 21:44:41,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:44:41,045 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-17 21:44:41,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:44:41,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-17 21:44:41,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=961, Unknown=3, NotChecked=0, Total=1190 [2022-03-17 21:44:41,045 INFO L87 Difference]: Start difference. First operand 1900 states and 3153 transitions. Second operand has 35 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 12 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 13 states have call predecessors, (33), 10 states have call successors, (33) [2022-03-17 21:45:48,780 WARN L232 SmtUtils]: Spent 58.31s on a formula simplification that was a NOOP. DAG size: 146 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:45:51,401 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:46:08,386 WARN L232 SmtUtils]: Spent 9.65s on a formula simplification that was a NOOP. DAG size: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:46:11,338 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:46:42,250 WARN L232 SmtUtils]: Spent 21.13s on a formula simplification that was a NOOP. DAG size: 111 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:46:44,255 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:46:46,258 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:46:48,439 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:46:50,907 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:46:53,088 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:46:56,196 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:46:58,708 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:47:01,619 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:47:04,493 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:47:06,497 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:47:08,500 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:47:11,251 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:47:14,876 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:47:16,553 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:47:18,556 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:48:06,535 WARN L232 SmtUtils]: Spent 40.29s on a formula simplification that was a NOOP. DAG size: 122 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:48:22,234 WARN L232 SmtUtils]: Spent 10.32s on a formula simplification that was a NOOP. DAG size: 104 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:48:24,322 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:48:28,201 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 []