/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-patterns/array2_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 10:22:52,275 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 10:22:52,277 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 10:22:52,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 10:22:52,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 10:22:52,344 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 10:22:52,346 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 10:22:52,347 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 10:22:52,348 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 10:22:52,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 10:22:52,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 10:22:52,349 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 10:22:52,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 10:22:52,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 10:22:52,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 10:22:52,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 10:22:52,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 10:22:52,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 10:22:52,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 10:22:52,355 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 10:22:52,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 10:22:52,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 10:22:52,369 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 10:22:52,370 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 10:22:52,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 10:22:52,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 10:22:52,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 10:22:52,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 10:22:52,384 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 10:22:52,395 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 10:22:52,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 10:22:52,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 10:22:52,397 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 10:22:52,397 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 10:22:52,397 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 10:22:52,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 10:22:52,397 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 10:22:52,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 10:22:52,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 10:22:52,398 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 10:22:52,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 10:22:52,398 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 10:22:52,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 10:22:52,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 10:22:52,398 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 10:22:52,398 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 10:22:52,398 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 10:22:52,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:22:52,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 10:22:52,399 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 10:22:52,399 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 10:22:52,399 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 10:22:52,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 10:22:52,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 10:22:52,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 10:22:52,614 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 10:22:52,614 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 10:22:52,615 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-patterns/array2_pattern.c [2022-01-31 10:22:52,673 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c52d5afee/97cbfac3032b4ce9b18cbfb3d8b7d29e/FLAG72b8ea04f [2022-01-31 10:22:53,057 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 10:22:53,058 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array2_pattern.c [2022-01-31 10:22:53,062 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c52d5afee/97cbfac3032b4ce9b18cbfb3d8b7d29e/FLAG72b8ea04f [2022-01-31 10:22:53,071 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c52d5afee/97cbfac3032b4ce9b18cbfb3d8b7d29e [2022-01-31 10:22:53,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 10:22:53,074 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 10:22:53,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 10:22:53,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 10:22:53,077 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 10:22:53,077 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:22:53" (1/1) ... [2022-01-31 10:22:53,078 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@168ba6ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:22:53, skipping insertion in model container [2022-01-31 10:22:53,078 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:22:53" (1/1) ... [2022-01-31 10:22:53,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 10:22:53,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 10:22:53,237 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array2_pattern.c[1322,1335] [2022-01-31 10:22:53,263 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:22:53,269 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 10:22:53,281 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array2_pattern.c[1322,1335] [2022-01-31 10:22:53,299 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:22:53,308 INFO L208 MainTranslator]: Completed translation [2022-01-31 10:22:53,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:22:53 WrapperNode [2022-01-31 10:22:53,309 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 10:22:53,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 10:22:53,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 10:22:53,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 10:22:53,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:22:53" (1/1) ... [2022-01-31 10:22:53,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:22:53" (1/1) ... [2022-01-31 10:22:53,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:22:53" (1/1) ... [2022-01-31 10:22:53,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:22:53" (1/1) ... [2022-01-31 10:22:53,341 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:22:53" (1/1) ... [2022-01-31 10:22:53,345 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:22:53" (1/1) ... [2022-01-31 10:22:53,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:22:53" (1/1) ... [2022-01-31 10:22:53,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 10:22:53,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 10:22:53,352 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 10:22:53,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 10:22:53,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:22:53" (1/1) ... [2022-01-31 10:22:53,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:22:53,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:22:53,375 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 10:22:53,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 10:22:53,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 10:22:53,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 10:22:53,431 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 10:22:53,431 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 10:22:53,431 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 10:22:53,432 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 10:22:53,432 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 10:22:53,432 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 10:22:53,432 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 10:22:53,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 10:22:53,433 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 10:22:53,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 10:22:53,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 10:22:53,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-01-31 10:22:53,433 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 10:22:53,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 10:22:53,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 10:22:53,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 10:22:53,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 10:22:53,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 10:22:53,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 10:22:53,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 10:22:53,499 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 10:22:53,500 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 10:22:53,601 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 10:22:53,605 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 10:22:53,606 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 10:22:53,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:22:53 BoogieIcfgContainer [2022-01-31 10:22:53,607 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 10:22:53,607 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 10:22:53,607 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 10:22:53,611 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 10:22:53,613 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:22:53" (1/1) ... [2022-01-31 10:22:53,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:22:53 BasicIcfg [2022-01-31 10:22:53,642 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 10:22:53,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 10:22:53,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 10:22:53,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 10:22:53,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 10:22:53" (1/4) ... [2022-01-31 10:22:53,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5505dc64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:22:53, skipping insertion in model container [2022-01-31 10:22:53,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:22:53" (2/4) ... [2022-01-31 10:22:53,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5505dc64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:22:53, skipping insertion in model container [2022-01-31 10:22:53,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:22:53" (3/4) ... [2022-01-31 10:22:53,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5505dc64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 10:22:53, skipping insertion in model container [2022-01-31 10:22:53,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:22:53" (4/4) ... [2022-01-31 10:22:53,647 INFO L111 eAbstractionObserver]: Analyzing ICFG array2_pattern.cJordan [2022-01-31 10:22:53,651 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 10:22:53,651 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 10:22:53,708 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 10:22:53,713 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 10:22:53,713 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 10:22:53,721 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 10:22:53,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 10:22:53,727 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:22:53,727 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:22:53,727 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:22:53,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:22:53,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1504316797, now seen corresponding path program 1 times [2022-01-31 10:22:53,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:22:53,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978253915] [2022-01-31 10:22:53,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:22:53,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:22:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:22:53,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:22:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:22:53,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 10:22:53,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:22:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:22:53,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:22:53,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978253915] [2022-01-31 10:22:53,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978253915] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:22:53,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:22:53,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 10:22:53,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109649113] [2022-01-31 10:22:53,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:22:53,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 10:22:53,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:22:53,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 10:22:53,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 10:22:53,937 INFO L87 Difference]: Start difference. First operand has 33 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 10:22:53,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:22:53,993 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-01-31 10:22:53,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 10:22:53,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-01-31 10:22:53,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:22:54,002 INFO L225 Difference]: With dead ends: 33 [2022-01-31 10:22:54,002 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 10:22:54,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 10:22:54,009 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:22:54,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 40 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:22:54,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 10:22:54,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-31 10:22:54,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:22:54,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-01-31 10:22:54,034 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2022-01-31 10:22:54,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:22:54,035 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-01-31 10:22:54,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 10:22:54,036 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-01-31 10:22:54,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 10:22:54,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:22:54,038 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:22:54,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 10:22:54,038 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:22:54,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:22:54,040 INFO L85 PathProgramCache]: Analyzing trace with hash -879387650, now seen corresponding path program 1 times [2022-01-31 10:22:54,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:22:54,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079841695] [2022-01-31 10:22:54,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:22:54,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:22:54,092 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:22:54,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1229168681] [2022-01-31 10:22:54,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:22:54,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:22:54,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:22:54,104 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:22:54,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 10:22:54,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:22:54,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-31 10:22:54,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:22:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:22:54,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 10:22:54,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:22:54,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079841695] [2022-01-31 10:22:54,264 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:22:54,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229168681] [2022-01-31 10:22:54,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229168681] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:22:54,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:22:54,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 10:22:54,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772996345] [2022-01-31 10:22:54,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:22:54,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 10:22:54,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:22:54,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 10:22:54,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 10:22:54,272 INFO L87 Difference]: Start difference. First operand 26 states and 29 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:22:54,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:22:54,299 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-01-31 10:22:54,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 10:22:54,300 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-01-31 10:22:54,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:22:54,302 INFO L225 Difference]: With dead ends: 30 [2022-01-31 10:22:54,305 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 10:22:54,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 10:22:54,309 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:22:54,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 96 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:22:54,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 10:22:54,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-31 10:22:54,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:22:54,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-01-31 10:22:54,313 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 27 [2022-01-31 10:22:54,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:22:54,314 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-01-31 10:22:54,314 INFO L471 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:22:54,314 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-01-31 10:22:54,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 10:22:54,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:22:54,315 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:22:54,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 10:22:54,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:22:54,531 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:22:54,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:22:54,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1925561755, now seen corresponding path program 1 times [2022-01-31 10:22:54,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:22:54,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925883588] [2022-01-31 10:22:54,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:22:54,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:22:54,549 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:22:54,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509690419] [2022-01-31 10:22:54,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:22:54,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:22:54,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:22:54,550 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:22:54,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 10:22:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:22:54,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 10:22:54,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:22:54,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:22:54,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 10:22:54,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:22:54,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925883588] [2022-01-31 10:22:54,664 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:22:54,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509690419] [2022-01-31 10:22:54,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509690419] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:22:54,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:22:54,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 10:22:54,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741542499] [2022-01-31 10:22:54,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:22:54,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 10:22:54,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:22:54,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 10:22:54,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 10:22:54,666 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:22:54,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:22:54,708 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-01-31 10:22:54,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 10:22:54,708 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-01-31 10:22:54,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:22:54,709 INFO L225 Difference]: With dead ends: 40 [2022-01-31 10:22:54,709 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 10:22:54,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 10:22:54,710 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 12 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:22:54,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 73 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:22:54,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 10:22:54,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-01-31 10:22:54,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:22:54,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-01-31 10:22:54,713 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 29 [2022-01-31 10:22:54,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:22:54,714 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-01-31 10:22:54,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:22:54,714 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-01-31 10:22:54,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 10:22:54,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:22:54,714 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:22:54,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 10:22:54,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-31 10:22:54,934 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:22:54,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:22:54,934 INFO L85 PathProgramCache]: Analyzing trace with hash -74774123, now seen corresponding path program 1 times [2022-01-31 10:22:54,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:22:54,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604134933] [2022-01-31 10:22:54,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:22:54,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:22:54,955 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:22:54,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1956185118] [2022-01-31 10:22:54,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:22:54,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:22:54,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:22:54,964 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:22:54,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 10:22:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:22:55,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 46 conjunts are in the unsatisfiable core [2022-01-31 10:22:55,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:22:55,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 10:22:55,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:22:55,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-01-31 10:22:55,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-31 10:22:55,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-01-31 10:22:55,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:22:55,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 166 [2022-01-31 10:22:55,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 158 [2022-01-31 10:22:55,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:22:55,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:22:55,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 142 [2022-01-31 10:22:55,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:22:55,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 17 [2022-01-31 10:22:55,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:22:55,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 27 [2022-01-31 10:22:55,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:22:55,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:22:55,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2022-01-31 10:22:55,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:22:55,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:22:58,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:22:58,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604134933] [2022-01-31 10:22:58,971 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:22:58,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956185118] [2022-01-31 10:22:58,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956185118] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:22:58,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:22:58,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-01-31 10:22:58,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380221645] [2022-01-31 10:22:58,972 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:22:58,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 10:22:58,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:22:58,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 10:22:58,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=323, Unknown=9, NotChecked=0, Total=420 [2022-01-31 10:22:58,973 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:22:59,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:22:59,235 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2022-01-31 10:22:59,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 10:22:59,236 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-01-31 10:22:59,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:22:59,238 INFO L225 Difference]: With dead ends: 47 [2022-01-31 10:22:59,238 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 10:22:59,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=133, Invalid=457, Unknown=10, NotChecked=0, Total=600 [2022-01-31 10:22:59,239 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 20 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:22:59,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 172 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2022-01-31 10:22:59,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 10:22:59,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2022-01-31 10:22:59,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:22:59,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2022-01-31 10:22:59,243 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 31 [2022-01-31 10:22:59,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:22:59,243 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2022-01-31 10:22:59,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:22:59,244 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2022-01-31 10:22:59,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 10:22:59,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:22:59,244 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:22:59,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-31 10:22:59,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:22:59,456 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:22:59,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:22:59,456 INFO L85 PathProgramCache]: Analyzing trace with hash 2065047922, now seen corresponding path program 2 times [2022-01-31 10:22:59,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:22:59,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044783881] [2022-01-31 10:22:59,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:22:59,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:22:59,479 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:22:59,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1488684975] [2022-01-31 10:22:59,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:22:59,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:22:59,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:22:59,499 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:22:59,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 10:22:59,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:22:59,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:22:59,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 10:22:59,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:22:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:22:59,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:22:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:22:59,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:22:59,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044783881] [2022-01-31 10:22:59,795 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:22:59,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488684975] [2022-01-31 10:22:59,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488684975] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:22:59,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:22:59,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 10:22:59,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945970630] [2022-01-31 10:22:59,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:22:59,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 10:22:59,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:22:59,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 10:22:59,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 10:22:59,796 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:22:59,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:22:59,905 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2022-01-31 10:22:59,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 10:22:59,906 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2022-01-31 10:22:59,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:22:59,906 INFO L225 Difference]: With dead ends: 51 [2022-01-31 10:22:59,907 INFO L226 Difference]: Without dead ends: 39 [2022-01-31 10:22:59,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:22:59,907 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 36 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:22:59,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 101 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:22:59,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-31 10:22:59,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2022-01-31 10:22:59,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:22:59,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-01-31 10:22:59,910 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 33 [2022-01-31 10:22:59,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:22:59,910 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-01-31 10:22:59,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:22:59,910 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-01-31 10:22:59,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 10:22:59,911 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:22:59,911 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:22:59,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-31 10:23:00,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:23:00,119 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:23:00,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:23:00,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1747795727, now seen corresponding path program 3 times [2022-01-31 10:23:00,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:23:00,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911845727] [2022-01-31 10:23:00,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:23:00,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:23:00,153 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:23:00,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [487776068] [2022-01-31 10:23:00,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:23:00,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:23:00,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:23:00,168 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:23:00,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 10:23:00,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 10:23:00,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:23:00,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 10:23:00,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:23:00,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:23:00,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:23:00,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:23:00,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:23:00,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911845727] [2022-01-31 10:23:00,446 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:23:00,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487776068] [2022-01-31 10:23:00,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487776068] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:23:00,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:23:00,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 10:23:00,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746031224] [2022-01-31 10:23:00,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:23:00,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 10:23:00,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:23:00,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 10:23:00,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 10:23:00,448 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:23:00,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:23:00,643 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-01-31 10:23:00,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 10:23:00,644 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2022-01-31 10:23:00,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:23:00,645 INFO L225 Difference]: With dead ends: 37 [2022-01-31 10:23:00,645 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 10:23:00,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-01-31 10:23:00,646 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:23:00,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 124 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:23:00,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 10:23:00,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-01-31 10:23:00,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:23:00,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-01-31 10:23:00,648 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2022-01-31 10:23:00,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:23:00,649 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-01-31 10:23:00,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:23:00,649 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-01-31 10:23:00,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 10:23:00,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:23:00,649 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:23:00,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 10:23:00,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:23:00,859 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:23:00,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:23:00,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1208017004, now seen corresponding path program 4 times [2022-01-31 10:23:00,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:23:00,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618404284] [2022-01-31 10:23:00,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:23:00,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:23:00,873 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:23:00,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732290436] [2022-01-31 10:23:00,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:23:00,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:23:00,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:23:00,874 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:23:00,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 10:23:01,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:23:01,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:23:01,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 60 conjunts are in the unsatisfiable core [2022-01-31 10:23:01,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:23:01,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 10:23:01,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:01,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-01-31 10:23:01,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-31 10:23:01,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-01-31 10:23:01,165 INFO L353 Elim1Store]: treesize reduction 78, result has 24.3 percent of original size [2022-01-31 10:23:01,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 53 [2022-01-31 10:23:01,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:01,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 180 [2022-01-31 10:23:01,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 165 [2022-01-31 10:23:01,837 INFO L353 Elim1Store]: treesize reduction 413, result has 14.7 percent of original size [2022-01-31 10:23:01,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 141 treesize of output 182 [2022-01-31 10:23:01,875 INFO L353 Elim1Store]: treesize reduction 85, result has 23.4 percent of original size [2022-01-31 10:23:01,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 45 [2022-01-31 10:23:02,035 INFO L353 Elim1Store]: treesize reduction 121, result has 2.4 percent of original size [2022-01-31 10:23:02,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 146 treesize of output 84 [2022-01-31 10:23:04,088 INFO L353 Elim1Store]: treesize reduction 63, result has 27.6 percent of original size [2022-01-31 10:23:04,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 137 treesize of output 82 [2022-01-31 10:23:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:23:04,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:23:05,949 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 (<= (mod (+ (* c_main_~index~0 4294967295) c_~ARR_SIZE~0 4294967295) 4294967296) 2147483647))) (and (or (forall ((v_ArrVal_263 (Array Int Int)) (v_ArrVal_265 (Array Int Int))) (= (let ((.cse1 (let ((.cse4 (+ (* (mod (+ (* c_main_~index~0 4294967295) c_~ARR_SIZE~0 4294967295) 4294967296) 4) |c_main_~#array2~0.offset|))) (store (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_263) |c_main_~#array2~0.base|) .cse4 (+ (select (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_265) |c_main_~#array2~0.base|) .cse4) (* c_main_~index~0 c_main_~num~0)))))) (let ((.cse0 (select (store (store |c_#memory_int| |c_main_~#array1~0.base| (let ((.cse2 (select |c_#memory_int| |c_main_~#array1~0.base|)) (.cse3 (+ (* c_main_~index~0 4) |c_main_~#array1~0.offset|))) (store .cse2 .cse3 (+ (select .cse2 .cse3) (* c_main_~index~0 (* c_main_~num~0 c_main_~num~0)))))) |c_main_~#array2~0.base| .cse1) |c_main_~#array1~0.base|))) (+ (select .cse0 |c_main_~#array1~0.offset|) (select .cse0 (+ |c_main_~#array1~0.offset| 4)) (select .cse1 (+ |c_main_~#array2~0.offset| 4)) c_main_~sum~0 (select .cse1 |c_main_~#array2~0.offset|)))) 0)) (not .cse5)) (or (forall ((v_ArrVal_263 (Array Int Int)) (v_ArrVal_265 (Array Int Int))) (= (let ((.cse7 (let ((.cse10 (+ (* (mod (+ (* c_main_~index~0 4294967295) c_~ARR_SIZE~0 4294967295) 4294967296) 4) (- 17179869184) |c_main_~#array2~0.offset|))) (store (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_263) |c_main_~#array2~0.base|) .cse10 (+ (* c_main_~index~0 c_main_~num~0) (select (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_265) |c_main_~#array2~0.base|) .cse10)))))) (let ((.cse6 (select (store (store |c_#memory_int| |c_main_~#array1~0.base| (let ((.cse8 (select |c_#memory_int| |c_main_~#array1~0.base|)) (.cse9 (+ (* c_main_~index~0 4) |c_main_~#array1~0.offset|))) (store .cse8 .cse9 (+ (select .cse8 .cse9) (* c_main_~index~0 (* c_main_~num~0 c_main_~num~0)))))) |c_main_~#array2~0.base| .cse7) |c_main_~#array1~0.base|))) (+ (select .cse6 |c_main_~#array1~0.offset|) (select .cse7 (+ |c_main_~#array2~0.offset| 4)) (select .cse6 (+ |c_main_~#array1~0.offset| 4)) (select .cse7 |c_main_~#array2~0.offset|) c_main_~sum~0))) 0)) .cse5))) is different from false [2022-01-31 10:23:09,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:23:09,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618404284] [2022-01-31 10:23:09,688 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:23:09,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732290436] [2022-01-31 10:23:09,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732290436] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:23:09,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:23:09,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-01-31 10:23:09,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314775724] [2022-01-31 10:23:09,689 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:23:09,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 10:23:09,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:23:09,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 10:23:09,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=473, Unknown=1, NotChecked=44, Total=600 [2022-01-31 10:23:09,690 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 16 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:23:10,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:23:10,339 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2022-01-31 10:23:10,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 10:23:10,340 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 16 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-01-31 10:23:10,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:23:10,340 INFO L225 Difference]: With dead ends: 57 [2022-01-31 10:23:10,341 INFO L226 Difference]: Without dead ends: 54 [2022-01-31 10:23:10,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=91, Invalid=562, Unknown=1, NotChecked=48, Total=702 [2022-01-31 10:23:10,342 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 10:23:10,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 286 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 132 Unchecked, 0.4s Time] [2022-01-31 10:23:10,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-31 10:23:10,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2022-01-31 10:23:10,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:23:10,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-01-31 10:23:10,346 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 35 [2022-01-31 10:23:10,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:23:10,346 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-01-31 10:23:10,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 16 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:23:10,346 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-01-31 10:23:10,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 10:23:10,347 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:23:10,347 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 10:23:10,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 10:23:10,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:23:10,559 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:23:10,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:23:10,560 INFO L85 PathProgramCache]: Analyzing trace with hash -2123260279, now seen corresponding path program 5 times [2022-01-31 10:23:10,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:23:10,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483169174] [2022-01-31 10:23:10,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:23:10,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:23:10,584 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:23:10,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [607643809] [2022-01-31 10:23:10,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:23:10,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:23:10,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:23:10,588 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:23:10,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 10:23:10,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-31 10:23:10,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:23:10,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:23:10,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:23:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:23:11,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:23:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:23:11,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:23:11,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483169174] [2022-01-31 10:23:11,607 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:23:11,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607643809] [2022-01-31 10:23:11,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607643809] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:23:11,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:23:11,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-31 10:23:11,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684470548] [2022-01-31 10:23:11,608 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:23:11,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:23:11,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:23:11,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:23:11,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:23:11,609 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:23:12,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:23:12,289 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2022-01-31 10:23:12,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 10:23:12,290 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2022-01-31 10:23:12,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:23:12,290 INFO L225 Difference]: With dead ends: 76 [2022-01-31 10:23:12,290 INFO L226 Difference]: Without dead ends: 70 [2022-01-31 10:23:12,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-01-31 10:23:12,291 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 44 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 10:23:12,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 127 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 10:23:12,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-31 10:23:12,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2022-01-31 10:23:12,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 10:23:12,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2022-01-31 10:23:12,295 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 37 [2022-01-31 10:23:12,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:23:12,295 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2022-01-31 10:23:12,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:23:12,296 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2022-01-31 10:23:12,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 10:23:12,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:23:12,296 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 10:23:12,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-31 10:23:12,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:23:12,514 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:23:12,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:23:12,514 INFO L85 PathProgramCache]: Analyzing trace with hash -2059941658, now seen corresponding path program 6 times [2022-01-31 10:23:12,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:23:12,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653187837] [2022-01-31 10:23:12,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:23:12,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:23:12,529 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:23:12,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1845244580] [2022-01-31 10:23:12,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:23:12,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:23:12,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:23:12,530 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:23:12,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 10:23:12,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-31 10:23:12,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:23:12,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:23:12,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:23:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:23:13,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:23:13,733 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:23:13,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:23:13,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653187837] [2022-01-31 10:23:13,733 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:23:13,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845244580] [2022-01-31 10:23:13,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845244580] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:23:13,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:23:13,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-31 10:23:13,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214268227] [2022-01-31 10:23:13,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:23:13,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:23:13,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:23:13,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:23:13,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:23:13,735 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:23:14,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:23:14,654 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2022-01-31 10:23:14,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 10:23:14,655 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2022-01-31 10:23:14,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:23:14,655 INFO L225 Difference]: With dead ends: 68 [2022-01-31 10:23:14,655 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 10:23:14,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-01-31 10:23:14,656 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 10:23:14,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 160 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 10:23:14,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 10:23:14,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2022-01-31 10:23:14,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 10:23:14,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2022-01-31 10:23:14,663 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 37 [2022-01-31 10:23:14,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:23:14,664 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2022-01-31 10:23:14,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:23:14,664 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2022-01-31 10:23:14,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 10:23:14,664 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:23:14,664 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:23:14,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 10:23:14,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-31 10:23:14,869 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:23:14,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:23:14,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1284526211, now seen corresponding path program 7 times [2022-01-31 10:23:14,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:23:14,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740800043] [2022-01-31 10:23:14,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:23:14,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:23:14,905 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:23:14,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1716287933] [2022-01-31 10:23:14,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 10:23:14,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:23:14,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:23:14,919 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:23:14,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 10:23:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:23:15,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 84 conjunts are in the unsatisfiable core [2022-01-31 10:23:15,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:23:15,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 10:23:15,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:15,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-01-31 10:23:15,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-01-31 10:23:15,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-31 10:23:15,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-31 10:23:16,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:16,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:16,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2022-01-31 10:23:16,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:16,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:16,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:16,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:16,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:16,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:16,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2022-01-31 10:23:19,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:19,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 194 [2022-01-31 10:23:19,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 172 [2022-01-31 10:23:19,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:19,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:19,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:19,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:19,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:19,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:19,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:19,859 INFO L353 Elim1Store]: treesize reduction 155, result has 22.9 percent of original size [2022-01-31 10:23:19,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 212 [2022-01-31 10:23:19,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:19,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:19,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:20,177 INFO L353 Elim1Store]: treesize reduction 115, result has 26.3 percent of original size [2022-01-31 10:23:20,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 63 [2022-01-31 10:23:22,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:22,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:22,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:22,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:22,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:22,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:22,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:22,330 INFO L353 Elim1Store]: treesize reduction 59, result has 4.8 percent of original size [2022-01-31 10:23:22,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 231 treesize of output 160 [2022-01-31 10:23:28,960 INFO L353 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2022-01-31 10:23:28,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 3 case distinctions, treesize of input 195 treesize of output 105 [2022-01-31 10:23:29,371 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:23:29,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:23:37,507 WARN L838 $PredicateComparison]: unable to prove that (or (<= c_~ARR_SIZE~0 c_main_~index~0) (let ((.cse5 (<= (mod (+ (* c_main_~index~0 4294967295) c_~ARR_SIZE~0 4294967295) 4294967296) 2147483647))) (and (or (forall ((v_ArrVal_460 (Array Int Int)) (v_ArrVal_462 (Array Int Int))) (= (let ((.cse1 (let ((.cse4 (+ (* (mod (+ (* c_main_~index~0 4294967295) c_~ARR_SIZE~0 4294967295) 4294967296) 4) |c_main_~#array2~0.offset|))) (store (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_460) |c_main_~#array2~0.base|) .cse4 (+ (* c_main_~index~0 c_main_~num~0) (select (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_462) |c_main_~#array2~0.base|) .cse4)))))) (let ((.cse0 (select (store (store |c_#memory_int| |c_main_~#array1~0.base| (let ((.cse2 (select |c_#memory_int| |c_main_~#array1~0.base|)) (.cse3 (+ (* c_main_~index~0 4) |c_main_~#array1~0.offset|))) (store .cse2 .cse3 (+ (select .cse2 .cse3) (* c_main_~index~0 (* c_main_~num~0 c_main_~num~0)))))) |c_main_~#array2~0.base| .cse1) |c_main_~#array1~0.base|))) (+ (select .cse0 (+ |c_main_~#array1~0.offset| 4)) (select .cse0 (+ 8 |c_main_~#array1~0.offset|)) (select .cse1 |c_main_~#array2~0.offset|) (select .cse1 (+ |c_main_~#array2~0.offset| 8)) (select .cse0 |c_main_~#array1~0.offset|) (select .cse1 (+ |c_main_~#array2~0.offset| 4)) c_main_~sum~0))) 0)) (not .cse5)) (or (forall ((v_ArrVal_460 (Array Int Int)) (v_ArrVal_462 (Array Int Int))) (= (let ((.cse7 (let ((.cse10 (+ (* (mod (+ (* c_main_~index~0 4294967295) c_~ARR_SIZE~0 4294967295) 4294967296) 4) (- 17179869184) |c_main_~#array2~0.offset|))) (store (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_460) |c_main_~#array2~0.base|) .cse10 (+ (* c_main_~index~0 c_main_~num~0) (select (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_462) |c_main_~#array2~0.base|) .cse10)))))) (let ((.cse6 (select (store (store |c_#memory_int| |c_main_~#array1~0.base| (let ((.cse8 (select |c_#memory_int| |c_main_~#array1~0.base|)) (.cse9 (+ (* c_main_~index~0 4) |c_main_~#array1~0.offset|))) (store .cse8 .cse9 (+ (select .cse8 .cse9) (* c_main_~index~0 (* c_main_~num~0 c_main_~num~0)))))) |c_main_~#array2~0.base| .cse7) |c_main_~#array1~0.base|))) (+ (select .cse6 (+ |c_main_~#array1~0.offset| 4)) (select .cse6 |c_main_~#array1~0.offset|) (select .cse7 |c_main_~#array2~0.offset|) (select .cse7 (+ |c_main_~#array2~0.offset| 8)) (select .cse7 (+ |c_main_~#array2~0.offset| 4)) (select .cse6 (+ 8 |c_main_~#array1~0.offset|)) c_main_~sum~0))) 0)) .cse5))) (< c_main_~index~0 0)) is different from false [2022-01-31 10:23:37,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:23:37,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740800043] [2022-01-31 10:23:37,566 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:23:37,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716287933] [2022-01-31 10:23:37,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716287933] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:23:37,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:23:37,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-01-31 10:23:37,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745766431] [2022-01-31 10:23:37,566 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:23:37,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 10:23:37,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:23:37,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 10:23:37,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=749, Unknown=12, NotChecked=56, Total=930 [2022-01-31 10:23:37,567 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 20 states have internal predecessors, (31), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:23:42,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:23:42,617 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2022-01-31 10:23:42,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 10:23:42,618 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 20 states have internal predecessors, (31), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39 [2022-01-31 10:23:42,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:23:42,618 INFO L225 Difference]: With dead ends: 88 [2022-01-31 10:23:42,618 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 10:23:42,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=186, Invalid=1287, Unknown=13, NotChecked=74, Total=1560 [2022-01-31 10:23:42,619 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 67 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 10:23:42,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 213 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 315 Invalid, 0 Unknown, 43 Unchecked, 1.6s Time] [2022-01-31 10:23:42,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 10:23:42,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2022-01-31 10:23:42,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 60 states have internal predecessors, (67), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 10:23:42,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2022-01-31 10:23:42,624 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 39 [2022-01-31 10:23:42,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:23:42,625 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2022-01-31 10:23:42,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 20 states have internal predecessors, (31), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:23:42,625 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2022-01-31 10:23:42,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 10:23:42,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:23:42,626 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:23:42,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 10:23:42,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 10:23:42,830 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:23:42,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:23:42,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1612356384, now seen corresponding path program 8 times [2022-01-31 10:23:42,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:23:42,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51547997] [2022-01-31 10:23:42,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:23:42,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:23:42,847 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:23:42,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053071170] [2022-01-31 10:23:42,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:23:42,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:23:42,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:23:42,849 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:23:42,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 10:23:42,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:23:42,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:23:42,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 10:23:42,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:23:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:23:43,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:23:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:23:44,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:23:44,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51547997] [2022-01-31 10:23:44,032 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:23:44,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053071170] [2022-01-31 10:23:44,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053071170] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:23:44,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:23:44,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-01-31 10:23:44,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610808566] [2022-01-31 10:23:44,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:23:44,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 10:23:44,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:23:44,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 10:23:44,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-01-31 10:23:44,033 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:23:45,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:23:45,343 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2022-01-31 10:23:45,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 10:23:45,343 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2022-01-31 10:23:45,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:23:45,344 INFO L225 Difference]: With dead ends: 107 [2022-01-31 10:23:45,344 INFO L226 Difference]: Without dead ends: 99 [2022-01-31 10:23:45,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2022-01-31 10:23:45,345 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 74 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 10:23:45,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 129 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 10:23:45,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-31 10:23:45,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 83. [2022-01-31 10:23:45,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.106060606060606) internal successors, (73), 66 states have internal predecessors, (73), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:23:45,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2022-01-31 10:23:45,349 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 41 [2022-01-31 10:23:45,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:23:45,350 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2022-01-31 10:23:45,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:23:45,350 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2022-01-31 10:23:45,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 10:23:45,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:23:45,351 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:23:45,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 10:23:45,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 10:23:45,567 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:23:45,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:23:45,568 INFO L85 PathProgramCache]: Analyzing trace with hash -892703747, now seen corresponding path program 9 times [2022-01-31 10:23:45,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:23:45,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178336469] [2022-01-31 10:23:45,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:23:45,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:23:45,595 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:23:45,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740702316] [2022-01-31 10:23:45,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:23:45,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:23:45,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:23:45,597 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:23:45,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 10:23:45,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-31 10:23:45,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:23:45,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 10:23:45,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:23:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:23:46,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:23:47,065 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:23:47,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:23:47,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178336469] [2022-01-31 10:23:47,065 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:23:47,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740702316] [2022-01-31 10:23:47,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740702316] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:23:47,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:23:47,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-01-31 10:23:47,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527685614] [2022-01-31 10:23:47,066 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:23:47,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 10:23:47,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:23:47,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 10:23:47,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-01-31 10:23:47,067 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:23:48,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:23:48,461 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2022-01-31 10:23:48,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 10:23:48,462 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2022-01-31 10:23:48,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:23:48,462 INFO L225 Difference]: With dead ends: 97 [2022-01-31 10:23:48,462 INFO L226 Difference]: Without dead ends: 97 [2022-01-31 10:23:48,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2022-01-31 10:23:48,463 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 55 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 10:23:48,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 205 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 10:23:48,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-31 10:23:48,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 85. [2022-01-31 10:23:48,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 68 states have internal predecessors, (75), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:23:48,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2022-01-31 10:23:48,467 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 41 [2022-01-31 10:23:48,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:23:48,467 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2022-01-31 10:23:48,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:23:48,468 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2022-01-31 10:23:48,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 10:23:48,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:23:48,468 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 10:23:48,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-01-31 10:23:48,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 10:23:48,683 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:23:48,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:23:48,684 INFO L85 PathProgramCache]: Analyzing trace with hash 2084014606, now seen corresponding path program 1 times [2022-01-31 10:23:48,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:23:48,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67991566] [2022-01-31 10:23:48,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:23:48,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:23:48,695 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:23:48,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279160625] [2022-01-31 10:23:48,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:23:48,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:23:48,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:23:48,697 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) [2022-01-31 10:23:48,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 10:23:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:23:48,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 86 conjunts are in the unsatisfiable core [2022-01-31 10:23:48,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:23:48,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 10:23:49,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:49,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-01-31 10:23:49,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-01-31 10:23:49,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-31 10:23:49,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-31 10:23:49,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:49,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:49,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2022-01-31 10:23:52,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:52,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 184 [2022-01-31 10:23:52,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 169 [2022-01-31 10:23:52,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:52,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:52,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:52,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:52,319 INFO L353 Elim1Store]: treesize reduction 105, result has 19.8 percent of original size [2022-01-31 10:23:52,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 141 treesize of output 182 [2022-01-31 10:23:52,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:52,529 INFO L353 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-01-31 10:23:52,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 49 [2022-01-31 10:23:52,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:52,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:52,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:52,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:23:52,802 INFO L353 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2022-01-31 10:23:52,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 41 [2022-01-31 10:24:01,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:01,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 243 treesize of output 226 [2022-01-31 10:24:01,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 196 [2022-01-31 10:24:01,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:01,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:01,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:01,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:01,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:01,820 INFO L353 Elim1Store]: treesize reduction 260, result has 9.1 percent of original size [2022-01-31 10:24:01,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 172 treesize of output 216 [2022-01-31 10:24:01,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:02,224 INFO L353 Elim1Store]: treesize reduction 124, result has 35.4 percent of original size [2022-01-31 10:24:02,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 50 treesize of output 98 [2022-01-31 10:24:06,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:06,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:24:06,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:06,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:06,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:06,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:06,258 INFO L353 Elim1Store]: treesize reduction 127, result has 17.5 percent of original size [2022-01-31 10:24:06,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 232 treesize of output 175 [2022-01-31 10:24:08,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:24:08,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:08,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 42 [2022-01-31 10:24:09,032 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:24:09,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:24:28,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:24:28,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67991566] [2022-01-31 10:24:28,762 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:24:28,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279160625] [2022-01-31 10:24:28,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279160625] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:24:28,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:24:28,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-01-31 10:24:28,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125404186] [2022-01-31 10:24:28,763 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:24:28,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 10:24:28,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:24:28,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 10:24:28,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=825, Unknown=21, NotChecked=0, Total=992 [2022-01-31 10:24:28,764 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 21 states have internal predecessors, (33), 5 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:24:29,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:24:29,753 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2022-01-31 10:24:29,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 10:24:29,753 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.32) internal successors, (33), 21 states have internal predecessors, (33), 5 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2022-01-31 10:24:29,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:24:29,754 INFO L225 Difference]: With dead ends: 103 [2022-01-31 10:24:29,754 INFO L226 Difference]: Without dead ends: 94 [2022-01-31 10:24:29,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=150, Invalid=885, Unknown=21, NotChecked=0, Total=1056 [2022-01-31 10:24:29,755 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 15 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 10:24:29,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 278 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 117 Unchecked, 0.6s Time] [2022-01-31 10:24:29,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-31 10:24:29,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2022-01-31 10:24:29,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 74 states have (on average 1.0945945945945945) internal successors, (81), 74 states have internal predecessors, (81), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 10:24:29,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2022-01-31 10:24:29,758 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 43 [2022-01-31 10:24:29,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:24:29,758 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2022-01-31 10:24:29,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.32) internal successors, (33), 21 states have internal predecessors, (33), 5 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:24:29,758 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2022-01-31 10:24:29,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 10:24:29,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:24:29,759 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2022-01-31 10:24:29,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-31 10:24:29,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 10:24:29,960 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:24:29,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:24:29,960 INFO L85 PathProgramCache]: Analyzing trace with hash 2013694426, now seen corresponding path program 10 times [2022-01-31 10:24:29,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:24:29,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947330206] [2022-01-31 10:24:29,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:24:29,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:24:29,985 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:24:29,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376942382] [2022-01-31 10:24:29,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:24:29,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:24:29,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:24:29,986 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) [2022-01-31 10:24:29,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 10:24:30,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:24:30,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:24:30,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 97 conjunts are in the unsatisfiable core [2022-01-31 10:24:30,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:24:30,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 10:24:30,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:30,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-01-31 10:24:30,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-01-31 10:24:30,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-31 10:24:30,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-31 10:24:31,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:31,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:31,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2022-01-31 10:24:31,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:31,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:31,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:31,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:31,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:31,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:31,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2022-01-31 10:24:32,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:32,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:32,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:32,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:32,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:32,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:32,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:32,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:32,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:32,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:32,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:32,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:32,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 91 [2022-01-31 10:24:37,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:37,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 208 [2022-01-31 10:24:37,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 179 [2022-01-31 10:24:37,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:37,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:37,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:37,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:37,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:37,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:37,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:37,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:37,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:37,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:37,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:37,669 INFO L244 Elim1Store]: Index analysis took 131 ms [2022-01-31 10:24:38,083 INFO L353 Elim1Store]: treesize reduction 205, result has 24.4 percent of original size [2022-01-31 10:24:38,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 155 treesize of output 242 [2022-01-31 10:24:38,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:38,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:38,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:38,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:38,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:38,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:38,640 INFO L353 Elim1Store]: treesize reduction 155, result has 26.5 percent of original size [2022-01-31 10:24:38,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 47 treesize of output 81 [2022-01-31 10:24:42,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:42,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:42,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:42,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:42,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:42,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:42,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:42,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:42,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:42,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:42,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:24:42,167 INFO L244 Elim1Store]: Index analysis took 130 ms [2022-01-31 10:24:42,227 INFO L353 Elim1Store]: treesize reduction 80, result has 3.6 percent of original size [2022-01-31 10:24:42,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 245 treesize of output 159 [2022-01-31 10:25:05,962 INFO L244 Elim1Store]: Index analysis took 113 ms [2022-01-31 10:25:06,513 INFO L353 Elim1Store]: treesize reduction 27, result has 75.2 percent of original size [2022-01-31 10:25:06,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 7 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 8 case distinctions, treesize of input 230 treesize of output 203 [2022-01-31 10:25:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:25:08,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:25:36,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:25:36,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947330206] [2022-01-31 10:25:36,826 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:25:36,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376942382] [2022-01-31 10:25:36,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376942382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:25:36,826 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:25:36,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-01-31 10:25:36,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674581320] [2022-01-31 10:25:36,827 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:25:36,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 10:25:36,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:25:36,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 10:25:36,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1187, Unknown=10, NotChecked=0, Total=1332 [2022-01-31 10:25:36,828 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 24 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:25:39,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:25:39,872 INFO L93 Difference]: Finished difference Result 119 states and 128 transitions. [2022-01-31 10:25:39,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 10:25:39,872 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 24 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-01-31 10:25:39,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:25:39,873 INFO L225 Difference]: With dead ends: 119 [2022-01-31 10:25:39,873 INFO L226 Difference]: Without dead ends: 116 [2022-01-31 10:25:39,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 34.5s TimeCoverageRelationStatistics Valid=155, Invalid=1316, Unknown=11, NotChecked=0, Total=1482 [2022-01-31 10:25:39,874 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 17 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 10:25:39,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 468 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 202 Invalid, 0 Unknown, 311 Unchecked, 1.9s Time] [2022-01-31 10:25:39,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-31 10:25:39,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 106. [2022-01-31 10:25:39,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 85 states have (on average 1.1058823529411765) internal successors, (94), 85 states have internal predecessors, (94), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 10:25:39,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2022-01-31 10:25:39,877 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 43 [2022-01-31 10:25:39,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:25:39,878 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2022-01-31 10:25:39,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 24 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:25:39,878 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2022-01-31 10:25:39,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 10:25:39,878 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:25:39,878 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-01-31 10:25:39,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 10:25:40,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 10:25:40,091 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:25:40,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:25:40,092 INFO L85 PathProgramCache]: Analyzing trace with hash -961371017, now seen corresponding path program 11 times [2022-01-31 10:25:40,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:25:40,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952247015] [2022-01-31 10:25:40,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:25:40,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:25:40,121 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:25:40,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887864597] [2022-01-31 10:25:40,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:25:40,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:25:40,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:25:40,123 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) [2022-01-31 10:25:40,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 10:25:40,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-31 10:25:40,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:25:40,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 10:25:40,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:25:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:25:41,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:25:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:25:42,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:25:42,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952247015] [2022-01-31 10:25:42,772 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:25:42,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887864597] [2022-01-31 10:25:42,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887864597] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:25:42,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:25:42,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-01-31 10:25:42,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346016547] [2022-01-31 10:25:42,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:25:42,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 10:25:42,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:25:42,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 10:25:42,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-01-31 10:25:42,773 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:25:46,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:25:46,561 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2022-01-31 10:25:46,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 10:25:46,562 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2022-01-31 10:25:46,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:25:46,563 INFO L225 Difference]: With dead ends: 148 [2022-01-31 10:25:46,563 INFO L226 Difference]: Without dead ends: 138 [2022-01-31 10:25:46,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=281, Invalid=775, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 10:25:46,563 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 88 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 10:25:46,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 181 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 10:25:46,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-01-31 10:25:46,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2022-01-31 10:25:46,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 91 states have (on average 1.098901098901099) internal successors, (100), 91 states have internal predecessors, (100), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 10:25:46,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2022-01-31 10:25:46,568 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 45 [2022-01-31 10:25:46,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:25:46,568 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2022-01-31 10:25:46,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:25:46,568 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2022-01-31 10:25:46,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 10:25:46,569 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:25:46,569 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-01-31 10:25:46,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-01-31 10:25:46,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:25:46,779 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:25:46,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:25:46,780 INFO L85 PathProgramCache]: Analyzing trace with hash -864921516, now seen corresponding path program 12 times [2022-01-31 10:25:46,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:25:46,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054889915] [2022-01-31 10:25:46,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:25:46,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:25:46,791 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:25:46,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1721520219] [2022-01-31 10:25:46,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:25:46,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:25:46,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:25:46,798 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) [2022-01-31 10:25:46,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 10:25:47,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-31 10:25:47,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:25:47,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 10:25:47,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:25:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:25:48,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:25:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:25:49,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:25:49,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054889915] [2022-01-31 10:25:49,787 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:25:49,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721520219] [2022-01-31 10:25:49,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721520219] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:25:49,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:25:49,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-01-31 10:25:49,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075053489] [2022-01-31 10:25:49,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:25:49,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 10:25:49,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:25:49,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 10:25:49,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-01-31 10:25:49,788 INFO L87 Difference]: Start difference. First operand 114 states and 122 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:25:52,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:25:52,160 INFO L93 Difference]: Finished difference Result 136 states and 143 transitions. [2022-01-31 10:25:52,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 10:25:52,162 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2022-01-31 10:25:52,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:25:52,162 INFO L225 Difference]: With dead ends: 136 [2022-01-31 10:25:52,162 INFO L226 Difference]: Without dead ends: 136 [2022-01-31 10:25:52,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2022-01-31 10:25:52,163 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 67 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:25:52,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 138 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 10:25:52,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-01-31 10:25:52,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 116. [2022-01-31 10:25:52,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 93 states have (on average 1.096774193548387) internal successors, (102), 93 states have internal predecessors, (102), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 10:25:52,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 124 transitions. [2022-01-31 10:25:52,166 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 124 transitions. Word has length 45 [2022-01-31 10:25:52,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:25:52,167 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 124 transitions. [2022-01-31 10:25:52,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:25:52,167 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 124 transitions. [2022-01-31 10:25:52,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 10:25:52,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:25:52,168 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 10:25:52,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-01-31 10:25:52,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-31 10:25:52,368 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:25:52,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:25:52,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1800830885, now seen corresponding path program 2 times [2022-01-31 10:25:52,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:25:52,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202684378] [2022-01-31 10:25:52,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:25:52,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:25:52,381 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:25:52,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582774410] [2022-01-31 10:25:52,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:25:52,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:25:52,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:25:52,399 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) [2022-01-31 10:25:52,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-31 10:25:52,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:25:52,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:25:52,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 100 conjunts are in the unsatisfiable core [2022-01-31 10:25:52,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:25:52,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 10:25:53,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:25:53,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-01-31 10:25:53,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-31 10:25:53,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-01-31 10:25:53,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:25:53,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:25:53,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2022-01-31 10:25:54,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:25:54,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:25:54,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:25:54,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:25:54,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:25:54,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:25:54,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2022-01-31 10:25:59,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:25:59,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 215 treesize of output 198 [2022-01-31 10:25:59,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 176 [2022-01-31 10:25:59,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:25:59,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:25:59,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:25:59,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:25:59,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:25:59,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:25:59,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:25:59,267 INFO L244 Elim1Store]: Index analysis took 104 ms [2022-01-31 10:25:59,734 INFO L353 Elim1Store]: treesize reduction 155, result has 22.9 percent of original size [2022-01-31 10:25:59,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 212 [2022-01-31 10:25:59,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:25:59,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:25:59,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:00,284 INFO L353 Elim1Store]: treesize reduction 127, result has 24.4 percent of original size [2022-01-31 10:26:00,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 67 [2022-01-31 10:26:00,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:00,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:00,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:00,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:00,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:00,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:00,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:00,434 INFO L244 Elim1Store]: Index analysis took 102 ms [2022-01-31 10:26:00,516 INFO L353 Elim1Store]: treesize reduction 59, result has 4.8 percent of original size [2022-01-31 10:26:00,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 161 treesize of output 125 [2022-01-31 10:26:38,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:38,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:38,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:38,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:38,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:38,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:38,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:38,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:38,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:38,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:38,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:38,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:38,989 INFO L244 Elim1Store]: Index analysis took 300 ms [2022-01-31 10:26:40,671 INFO L353 Elim1Store]: treesize reduction 335, result has 18.9 percent of original size [2022-01-31 10:26:40,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 12 disjoint index pairs (out of 55 index pairs), introduced 12 new quantified variables, introduced 18 case distinctions, treesize of input 324 treesize of output 342 [2022-01-31 10:26:40,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 283 treesize of output 261 [2022-01-31 10:26:40,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:40,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:40,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:40,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:40,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:40,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:40,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:40,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:26:40,939 INFO L244 Elim1Store]: Index analysis took 215 ms [2022-01-31 10:26:41,503 INFO L353 Elim1Store]: treesize reduction 315, result has 12.7 percent of original size [2022-01-31 10:26:41,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 11 case distinctions, treesize of input 184 treesize of output 251 [2022-01-31 10:27:00,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:00,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:00,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:00,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:00,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:00,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:00,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:27:00,120 INFO L244 Elim1Store]: Index analysis took 101 ms [2022-01-31 10:27:00,440 INFO L353 Elim1Store]: treesize reduction 27, result has 56.5 percent of original size [2022-01-31 10:27:00,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 415 treesize of output 382