/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 11:14:28,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 11:14:28,356 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 11:14:28,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 11:14:28,408 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 11:14:28,409 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 11:14:28,412 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 11:14:28,416 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 11:14:28,418 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 11:14:28,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 11:14:28,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 11:14:28,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 11:14:28,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 11:14:28,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 11:14:28,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 11:14:28,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 11:14:28,431 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 11:14:28,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 11:14:28,433 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 11:14:28,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 11:14:28,440 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 11:14:28,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 11:14:28,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 11:14:28,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 11:14:28,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 11:14:28,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 11:14:28,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 11:14:28,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 11:14:28,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 11:14:28,459 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-17 11:14:28,493 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 11:14:28,494 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 11:14:28,494 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-17 11:14:28,494 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-17 11:14:28,495 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 11:14:28,495 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 11:14:28,495 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 11:14:28,496 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 11:14:28,496 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 11:14:28,496 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 11:14:28,497 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 11:14:28,497 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 11:14:28,497 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 11:14:28,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 11:14:28,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 11:14:28,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 11:14:28,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 11:14:28,498 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 11:14:28,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 11:14:28,498 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 11:14:28,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 11:14:28,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 11:14:28,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 11:14:28,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 11:14:28,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 11:14:28,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 11:14:28,499 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 11:14:28,499 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 11:14:28,500 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 11:14:28,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 11:14:28,500 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-17 11:14:28,500 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-17 11:14:28,500 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 11:14:28,500 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 11:14:28,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 11:14:28,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 11:14:28,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 11:14:28,717 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 11:14:28,718 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 11:14:28,719 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound10.c [2022-03-17 11:14:28,779 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8b41eea5/a1aaf1d200884f11989dac5fce08fd0a/FLAGe6c200b2d [2022-03-17 11:14:29,133 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 11:14:29,134 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound10.c [2022-03-17 11:14:29,138 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8b41eea5/a1aaf1d200884f11989dac5fce08fd0a/FLAGe6c200b2d [2022-03-17 11:14:29,146 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8b41eea5/a1aaf1d200884f11989dac5fce08fd0a [2022-03-17 11:14:29,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 11:14:29,149 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-17 11:14:29,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 11:14:29,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 11:14:29,156 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 11:14:29,157 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 11:14:29" (1/1) ... [2022-03-17 11:14:29,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e976929 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:14:29, skipping insertion in model container [2022-03-17 11:14:29,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 11:14:29" (1/1) ... [2022-03-17 11:14:29,163 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 11:14:29,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 11:14:29,311 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound10.c[597,610] [2022-03-17 11:14:29,332 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 11:14:29,337 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 11:14:29,345 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound10.c[597,610] [2022-03-17 11:14:29,351 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 11:14:29,359 INFO L208 MainTranslator]: Completed translation [2022-03-17 11:14:29,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:14:29 WrapperNode [2022-03-17 11:14:29,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 11:14:29,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 11:14:29,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 11:14:29,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 11:14:29,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:14:29" (1/1) ... [2022-03-17 11:14:29,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:14:29" (1/1) ... [2022-03-17 11:14:29,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:14:29" (1/1) ... [2022-03-17 11:14:29,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:14:29" (1/1) ... [2022-03-17 11:14:29,374 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:14:29" (1/1) ... [2022-03-17 11:14:29,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:14:29" (1/1) ... [2022-03-17 11:14:29,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:14:29" (1/1) ... [2022-03-17 11:14:29,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 11:14:29,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 11:14:29,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 11:14:29,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 11:14:29,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:14:29" (1/1) ... [2022-03-17 11:14:29,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 11:14:29,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 11:14:29,414 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 11:14:29,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 11:14:29,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 11:14:29,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 11:14:29,438 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 11:14:29,438 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 11:14:29,438 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 11:14:29,439 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 11:14:29,439 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 11:14:29,439 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 11:14:29,439 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 11:14:29,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 11:14:29,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 11:14:29,439 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 11:14:29,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 11:14:29,439 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 11:14:29,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 11:14:29,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 11:14:29,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 11:14:29,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 11:14:29,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 11:14:29,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 11:14:29,491 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 11:14:29,492 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 11:14:29,603 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 11:14:29,608 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 11:14:29,608 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 11:14:29,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 11:14:29 BoogieIcfgContainer [2022-03-17 11:14:29,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 11:14:29,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 11:14:29,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 11:14:29,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 11:14:29,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 11:14:29" (1/3) ... [2022-03-17 11:14:29,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40a3332 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 11:14:29, skipping insertion in model container [2022-03-17 11:14:29,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:14:29" (2/3) ... [2022-03-17 11:14:29,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40a3332 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 11:14:29, skipping insertion in model container [2022-03-17 11:14:29,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 11:14:29" (3/3) ... [2022-03-17 11:14:29,615 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound10.c [2022-03-17 11:14:29,618 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 11:14:29,619 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 11:14:29,652 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 11:14:29,657 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 11:14:29,658 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 11:14:29,676 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 11:14:29,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 11:14:29,680 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 11:14:29,680 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 11:14:29,681 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 11:14:29,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 11:14:29,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1867489771, now seen corresponding path program 1 times [2022-03-17 11:14:29,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 11:14:29,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301688377] [2022-03-17 11:14:29,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:14:29,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 11:14:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:14:29,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 11:14:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:14:29,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 11:14:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:14:29,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 11:14:29,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:14:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 11:14:29,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 11:14:29,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301688377] [2022-03-17 11:14:29,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301688377] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 11:14:29,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 11:14:29,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 11:14:29,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262359826] [2022-03-17 11:14:29,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 11:14:29,861 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 11:14:29,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 11:14:29,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 11:14:29,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 11:14:29,885 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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) [2022-03-17 11:14:29,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 11:14:29,935 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2022-03-17 11:14:29,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 11:14:29,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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 23 [2022-03-17 11:14:29,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 11:14:29,946 INFO L225 Difference]: With dead ends: 57 [2022-03-17 11:14:29,946 INFO L226 Difference]: Without dead ends: 27 [2022-03-17 11:14:29,949 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 11:14:29,952 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 11:14:29,953 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 11:14:29,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-17 11:14:29,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-17 11:14:29,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 11:14:29,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-03-17 11:14:29,979 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2022-03-17 11:14:29,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 11:14:29,979 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-03-17 11:14:29,979 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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) [2022-03-17 11:14:29,980 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-03-17 11:14:29,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 11:14:29,981 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 11:14:29,981 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 11:14:29,981 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 11:14:29,982 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 11:14:29,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 11:14:29,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1827672217, now seen corresponding path program 1 times [2022-03-17 11:14:29,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 11:14:29,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446020719] [2022-03-17 11:14:29,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:14:29,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 11:14:30,001 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 11:14:30,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790210912] [2022-03-17 11:14:30,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:14:30,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:14:30,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 11:14:30,003 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 11:14:30,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 11:14:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:14:30,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-17 11:14:30,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 11:14:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 11:14:30,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 11:14:30,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 11:14:30,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446020719] [2022-03-17 11:14:30,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 11:14:30,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790210912] [2022-03-17 11:14:30,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790210912] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 11:14:30,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 11:14:30,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 11:14:30,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650926530] [2022-03-17 11:14:30,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 11:14:30,233 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 11:14:30,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 11:14:30,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 11:14:30,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 11:14:30,234 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 11:14:30,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 11:14:30,306 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-03-17 11:14:30,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 11:14:30,310 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-17 11:14:30,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 11:14:30,314 INFO L225 Difference]: With dead ends: 39 [2022-03-17 11:14:30,314 INFO L226 Difference]: Without dead ends: 35 [2022-03-17 11:14:30,314 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-17 11:14:30,315 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 11:14:30,316 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 101 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 11:14:30,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-17 11:14:30,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-03-17 11:14:30,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 11:14:30,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-03-17 11:14:30,323 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23 [2022-03-17 11:14:30,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 11:14:30,324 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-03-17 11:14:30,325 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 11:14:30,325 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-03-17 11:14:30,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-17 11:14:30,326 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 11:14:30,326 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 11:14:30,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 11:14:30,544 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:14:30,544 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 11:14:30,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 11:14:30,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1419291471, now seen corresponding path program 1 times [2022-03-17 11:14:30,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 11:14:30,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129191809] [2022-03-17 11:14:30,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:14:30,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 11:14:30,563 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 11:14:30,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1456342567] [2022-03-17 11:14:30,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:14:30,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:14:30,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 11:14:30,571 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 11:14:30,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 11:14:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:14:30,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-17 11:14:30,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 11:14:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 11:14:30,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 11:14:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-17 11:14:30,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 11:14:30,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129191809] [2022-03-17 11:14:30,908 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 11:14:30,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456342567] [2022-03-17 11:14:30,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456342567] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 11:14:30,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 11:14:30,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-03-17 11:14:30,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733666747] [2022-03-17 11:14:30,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 11:14:30,912 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 11:14:30,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 11:14:30,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 11:14:30,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-17 11:14:30,914 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 11:14:31,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 11:14:31,133 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-03-17 11:14:31,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-17 11:14:31,134 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2022-03-17 11:14:31,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 11:14:31,135 INFO L225 Difference]: With dead ends: 48 [2022-03-17 11:14:31,135 INFO L226 Difference]: Without dead ends: 42 [2022-03-17 11:14:31,135 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-17 11:14:31,136 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 11:14:31,137 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 157 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 11:14:31,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-17 11:14:31,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-03-17 11:14:31,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 11:14:31,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-03-17 11:14:31,149 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2022-03-17 11:14:31,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 11:14:31,149 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-03-17 11:14:31,150 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 11:14:31,150 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-03-17 11:14:31,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-17 11:14:31,152 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 11:14:31,153 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 11:14:31,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 11:14:31,368 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-17 11:14:31,368 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 11:14:31,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 11:14:31,369 INFO L85 PathProgramCache]: Analyzing trace with hash 125050924, now seen corresponding path program 1 times [2022-03-17 11:14:31,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 11:14:31,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853181626] [2022-03-17 11:14:31,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:14:31,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 11:14:31,383 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 11:14:31,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355287933] [2022-03-17 11:14:31,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:14:31,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:14:31,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 11:14:31,392 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 11:14:31,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 11:14:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:14:31,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-17 11:14:31,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 11:14:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-17 11:14:31,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 11:14:32,216 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-17 11:14:32,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 11:14:32,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853181626] [2022-03-17 11:14:32,217 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 11:14:32,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355287933] [2022-03-17 11:14:32,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355287933] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 11:14:32,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 11:14:32,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-03-17 11:14:32,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169624657] [2022-03-17 11:14:32,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 11:14:32,218 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-17 11:14:32,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 11:14:32,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-17 11:14:32,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-17 11:14:32,219 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-17 11:14:32,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 11:14:32,818 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-03-17 11:14:32,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-17 11:14:32,819 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 39 [2022-03-17 11:14:32,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 11:14:32,820 INFO L225 Difference]: With dead ends: 60 [2022-03-17 11:14:32,820 INFO L226 Difference]: Without dead ends: 52 [2022-03-17 11:14:32,821 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2022-03-17 11:14:32,822 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 30 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 11:14:32,822 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 280 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 276 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2022-03-17 11:14:32,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-17 11:14:32,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2022-03-17 11:14:32,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 11:14:32,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-03-17 11:14:32,831 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 39 [2022-03-17 11:14:32,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 11:14:32,832 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-03-17 11:14:32,832 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-17 11:14:32,832 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-03-17 11:14:32,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-17 11:14:32,833 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 11:14:32,833 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 11:14:32,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 11:14:33,057 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:14:33,058 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 11:14:33,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 11:14:33,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1662296326, now seen corresponding path program 1 times [2022-03-17 11:14:33,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 11:14:33,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492161541] [2022-03-17 11:14:33,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:14:33,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 11:14:33,071 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 11:14:33,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [25341570] [2022-03-17 11:14:33,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:14:33,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:14:33,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 11:14:33,072 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 11:14:33,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 11:14:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:14:33,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-17 11:14:33,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 11:14:33,237 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 11:14:33,241 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 11:14:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-17 11:14:37,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 11:14:37,418 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-17 11:14:37,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 11:14:37,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492161541] [2022-03-17 11:14:37,419 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 11:14:37,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25341570] [2022-03-17 11:14:37,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25341570] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 11:14:37,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 11:14:37,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-03-17 11:14:37,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698769237] [2022-03-17 11:14:37,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 11:14:37,420 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-17 11:14:37,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 11:14:37,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-17 11:14:37,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=146, Unknown=1, NotChecked=0, Total=182 [2022-03-17 11:14:37,421 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 14 states, 10 states have (on average 2.9) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-17 11:14:39,440 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 11:14:43,482 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 11:14:45,487 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 11:14:47,492 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 11:14:49,528 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 11:14:51,545 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 11:14:53,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 11:14:53,831 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2022-03-17 11:14:53,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 11:14:53,831 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.9) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 48 [2022-03-17 11:14:53,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 11:14:53,832 INFO L225 Difference]: With dead ends: 56 [2022-03-17 11:14:53,832 INFO L226 Difference]: Without dead ends: 50 [2022-03-17 11:14:53,833 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=66, Invalid=237, Unknown=3, NotChecked=0, Total=306 [2022-03-17 11:14:53,833 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 28 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 19 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2022-03-17 11:14:53,834 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 140 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 105 Invalid, 6 Unknown, 0 Unchecked, 12.1s Time] [2022-03-17 11:14:53,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-17 11:14:53,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2022-03-17 11:14:53,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 11:14:53,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2022-03-17 11:14:53,842 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 48 [2022-03-17 11:14:53,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 11:14:53,843 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2022-03-17 11:14:53,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.9) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-17 11:14:53,843 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2022-03-17 11:14:53,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-17 11:14:53,844 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 11:14:53,844 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 11:14:53,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 11:14:54,055 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:14:54,055 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 11:14:54,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 11:14:54,056 INFO L85 PathProgramCache]: Analyzing trace with hash -143142008, now seen corresponding path program 1 times [2022-03-17 11:14:54,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 11:14:54,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943235811] [2022-03-17 11:14:54,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:14:54,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 11:14:54,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 11:14:54,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [297934479] [2022-03-17 11:14:54,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:14:54,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:14:54,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 11:14:54,069 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 11:14:54,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 11:14:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:14:54,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 11:14:54,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 11:14:54,332 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 11:14:54,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 11:14:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 11:14:54,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 11:14:54,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943235811] [2022-03-17 11:14:54,502 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 11:14:54,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297934479] [2022-03-17 11:14:54,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297934479] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 11:14:54,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 11:14:54,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-17 11:14:54,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623137710] [2022-03-17 11:14:54,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 11:14:54,503 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-17 11:14:54,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 11:14:54,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-17 11:14:54,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-17 11:14:54,504 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-03-17 11:14:54,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 11:14:54,663 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2022-03-17 11:14:54,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 11:14:54,664 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 48 [2022-03-17 11:14:54,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 11:14:54,665 INFO L225 Difference]: With dead ends: 65 [2022-03-17 11:14:54,665 INFO L226 Difference]: Without dead ends: 59 [2022-03-17 11:14:54,665 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-03-17 11:14:54,666 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 11:14:54,666 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 191 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 11:14:54,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-17 11:14:54,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2022-03-17 11:14:54,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 11:14:54,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-03-17 11:14:54,676 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 48 [2022-03-17 11:14:54,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 11:14:54,676 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-03-17 11:14:54,676 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-03-17 11:14:54,676 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-03-17 11:14:54,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-17 11:14:54,677 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 11:14:54,677 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 11:14:54,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 11:14:54,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:14:54,891 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 11:14:54,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 11:14:54,892 INFO L85 PathProgramCache]: Analyzing trace with hash 55892592, now seen corresponding path program 2 times [2022-03-17 11:14:54,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 11:14:54,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323373485] [2022-03-17 11:14:54,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:14:54,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 11:14:54,903 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 11:14:54,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1152447791] [2022-03-17 11:14:54,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 11:14:54,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:14:54,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 11:14:54,910 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 11:14:54,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 11:14:54,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 11:14:54,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 11:14:54,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 11:14:54,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 11:14:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-17 11:14:55,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 11:14:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-17 11:14:55,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 11:14:55,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323373485] [2022-03-17 11:14:55,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 11:14:55,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152447791] [2022-03-17 11:14:55,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152447791] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 11:14:55,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 11:14:55,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-17 11:14:55,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082600452] [2022-03-17 11:14:55,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 11:14:55,342 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-17 11:14:55,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 11:14:55,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-17 11:14:55,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-17 11:14:55,343 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-03-17 11:14:55,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 11:14:55,548 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2022-03-17 11:14:55,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 11:14:55,548 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 57 [2022-03-17 11:14:55,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 11:14:55,549 INFO L225 Difference]: With dead ends: 78 [2022-03-17 11:14:55,549 INFO L226 Difference]: Without dead ends: 72 [2022-03-17 11:14:55,550 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-03-17 11:14:55,550 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 11:14:55,551 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 287 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 11:14:55,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-17 11:14:55,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2022-03-17 11:14:55,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 11:14:55,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-03-17 11:14:55,562 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 57 [2022-03-17 11:14:55,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 11:14:55,563 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-03-17 11:14:55,563 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-03-17 11:14:55,563 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-03-17 11:14:55,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-17 11:14:55,564 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 11:14:55,564 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 11:14:55,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 11:14:55,785 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:14:55,785 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 11:14:55,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 11:14:55,786 INFO L85 PathProgramCache]: Analyzing trace with hash 2136090540, now seen corresponding path program 3 times [2022-03-17 11:14:55,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 11:14:55,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799526740] [2022-03-17 11:14:55,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:14:55,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 11:14:55,801 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 11:14:55,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313340397] [2022-03-17 11:14:55,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 11:14:55,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:14:55,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 11:14:55,803 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 11:14:55,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 11:14:55,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-17 11:14:55,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 11:14:55,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-17 11:14:55,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 11:14:57,493 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 11:14:57,497 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 11:14:57,499 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 11:14:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-17 11:14:59,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 11:15:00,215 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 11:15:01,825 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 11:15:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-17 11:15:15,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 11:15:15,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799526740] [2022-03-17 11:15:15,902 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 11:15:15,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313340397] [2022-03-17 11:15:15,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313340397] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 11:15:15,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 11:15:15,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 25 [2022-03-17 11:15:15,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217383530] [2022-03-17 11:15:15,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 11:15:15,903 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-17 11:15:15,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 11:15:15,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-17 11:15:15,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=499, Unknown=3, NotChecked=0, Total=600 [2022-03-17 11:15:15,904 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 25 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 22 states have internal predecessors, (46), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-17 11:15:30,102 WARN L232 SmtUtils]: Spent 8.15s on a formula simplification. DAG size of input: 65 DAG size of output: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 11:15:32,256 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 11:15:32,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 11:15:32,333 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-03-17 11:15:32,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-17 11:15:32,333 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 22 states have internal predecessors, (46), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 57 [2022-03-17 11:15:32,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 11:15:32,334 INFO L225 Difference]: With dead ends: 62 [2022-03-17 11:15:32,334 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 11:15:32,335 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=236, Invalid=1093, Unknown=3, NotChecked=0, Total=1332 [2022-03-17 11:15:32,335 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-17 11:15:32,336 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 232 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 245 Invalid, 0 Unknown, 41 Unchecked, 2.9s Time] [2022-03-17 11:15:32,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 11:15:32,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 11:15:32,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-17 11:15:32,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 11:15:32,336 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2022-03-17 11:15:32,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 11:15:32,337 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 11:15:32,337 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 22 states have internal predecessors, (46), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-17 11:15:32,337 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 11:15:32,337 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 11:15:32,339 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 11:15:32,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-17 11:15:32,544 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:15:32,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-17 11:15:59,955 WARN L232 SmtUtils]: Spent 27.35s on a formula simplification. DAG size of input: 114 DAG size of output: 38 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-17 11:16:10,624 WARN L232 SmtUtils]: Spent 10.64s on a formula simplification. DAG size of input: 134 DAG size of output: 45 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-17 11:16:10,991 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 7) no Hoare annotation was computed. [2022-03-17 11:16:10,991 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 7) no Hoare annotation was computed. [2022-03-17 11:16:10,991 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 7) no Hoare annotation was computed. [2022-03-17 11:16:10,991 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 10 12) the Hoare annotation is: true [2022-03-17 11:16:10,991 INFO L882 garLoopResultBuilder]: For program point L11(line 11) no Hoare annotation was computed. [2022-03-17 11:16:10,991 INFO L882 garLoopResultBuilder]: For program point L11-2(lines 10 12) no Hoare annotation was computed. [2022-03-17 11:16:10,991 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 10 12) no Hoare annotation was computed. [2022-03-17 11:16:10,995 INFO L878 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= main_~X~0 10) (<= 0 main_~X~0)) [2022-03-17 11:16:10,995 INFO L882 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2022-03-17 11:16:10,995 INFO L885 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-03-17 11:16:10,995 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 21 53) no Hoare annotation was computed. [2022-03-17 11:16:10,995 INFO L882 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-03-17 11:16:10,995 INFO L878 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse2 (* main_~y~0 2)) (.cse0 (* main_~Y~0 2)) (.cse1 (* 2 (* main_~Y~0 main_~x~0)))) (and (= (+ .cse0 .cse1) (+ (* (* main_~X~0 main_~y~0) 2) main_~X~0 main_~v~0)) (= (+ .cse2 .cse0 (* 2 main_~yx~0)) (+ (* 2 main_~xy~0) main_~X~0 main_~v~0)) (= (+ (* 2 (* main_~y~0 main_~x~0)) main_~X~0 main_~v~0) (+ .cse2 .cse0 .cse1)))) [2022-03-17 11:16:10,995 INFO L882 garLoopResultBuilder]: For program point L50-1(line 50) no Hoare annotation was computed. [2022-03-17 11:16:10,995 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 21 53) no Hoare annotation was computed. [2022-03-17 11:16:10,996 INFO L882 garLoopResultBuilder]: For program point L40(lines 40 45) no Hoare annotation was computed. [2022-03-17 11:16:10,996 INFO L882 garLoopResultBuilder]: For program point L40-2(lines 40 45) no Hoare annotation was computed. [2022-03-17 11:16:10,996 INFO L878 garLoopResultBuilder]: At program point L32-2(lines 32 47) the Hoare annotation is: (let ((.cse0 (<= main_~x~0 main_~X~0))) (and (or .cse0 (forall ((main_~y~0 Int)) (= (+ (* 2 (* main_~y~0 main_~x~0)) main_~X~0 main_~v~0) (+ (* main_~y~0 2) (* main_~Y~0 2) (* 2 (* main_~Y~0 main_~x~0))))) (not (= main_~X~0 0))) (<= main_~X~0 10) (or .cse0 (forall ((main_~Y~0 Int)) (= (* 2 (* main_~y~0 main_~x~0)) (+ (* (* main_~X~0 main_~y~0) 2) (* main_~y~0 2))))) (= (+ (* main_~Y~0 2) (* 2 (* main_~Y~0 main_~x~0))) (+ (* (* main_~X~0 main_~y~0) 2) main_~X~0 main_~v~0)) (<= 0 main_~Y~0) (<= 0 main_~X~0) (<= main_~Y~0 10))) [2022-03-17 11:16:10,996 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 21 53) the Hoare annotation is: true [2022-03-17 11:16:10,996 INFO L882 garLoopResultBuilder]: For program point L32-3(lines 32 47) no Hoare annotation was computed. [2022-03-17 11:16:10,996 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse1 (* main_~Y~0 2)) (.cse0 (* 2 main_~xy~0)) (.cse4 (* 2 (* main_~Y~0 main_~x~0))) (.cse2 (* 2 main_~yx~0)) (.cse3 (<= main_~x~0 main_~X~0))) (and (= (+ .cse0 main_~X~0 main_~v~0) (+ .cse1 .cse2)) (or .cse3 (forall ((main_~y~0 Int)) (= (+ (* 2 (* main_~y~0 main_~x~0)) main_~X~0 main_~v~0) (+ (* main_~y~0 2) (* main_~Y~0 2) (* 2 (* main_~Y~0 main_~x~0))))) (not (= main_~X~0 0))) (<= main_~X~0 10) (= (+ .cse1 .cse4) (+ (* (* main_~X~0 main_~y~0) 2) main_~X~0 main_~v~0)) (<= 0 main_~Y~0) (<= 0 main_~X~0) (or (= (+ .cse0 (* main_~y~0 2) .cse4) (+ (* 2 (* main_~y~0 main_~x~0)) .cse2)) .cse3) (<= main_~Y~0 10))) [2022-03-17 11:16:10,996 INFO L882 garLoopResultBuilder]: For program point L35-1(lines 32 47) no Hoare annotation was computed. [2022-03-17 11:16:10,996 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-17 11:16:10,996 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-17 11:16:10,997 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-17 11:16:10,997 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-17 11:16:10,997 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-17 11:16:10,997 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-17 11:16:10,997 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-17 11:16:10,997 INFO L882 garLoopResultBuilder]: For program point L15(lines 15 16) no Hoare annotation was computed. [2022-03-17 11:16:10,997 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 13 19) the Hoare annotation is: true [2022-03-17 11:16:10,997 INFO L882 garLoopResultBuilder]: For program point L14(lines 14 17) no Hoare annotation was computed. [2022-03-17 11:16:10,997 INFO L882 garLoopResultBuilder]: For program point L14-2(lines 13 19) no Hoare annotation was computed. [2022-03-17 11:16:10,997 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 13 19) no Hoare annotation was computed. [2022-03-17 11:16:10,997 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2022-03-17 11:16:11,000 INFO L718 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2022-03-17 11:16:11,002 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 11:16:11,012 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-17 11:16:11,013 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-17 11:16:11,019 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-17 11:16:11,020 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-17 11:16:11,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 11:16:11 BoogieIcfgContainer [2022-03-17 11:16:11,022 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 11:16:11,023 INFO L158 Benchmark]: Toolchain (without parser) took 101873.88ms. Allocated memory was 187.7MB in the beginning and 242.2MB in the end (delta: 54.5MB). Free memory was 136.5MB in the beginning and 134.4MB in the end (delta: 2.1MB). Peak memory consumption was 57.3MB. Max. memory is 8.0GB. [2022-03-17 11:16:11,023 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 187.7MB. Free memory is still 152.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 11:16:11,023 INFO L158 Benchmark]: CACSL2BoogieTranslator took 208.64ms. Allocated memory is still 187.7MB. Free memory was 136.3MB in the beginning and 161.6MB in the end (delta: -25.3MB). Peak memory consumption was 12.8MB. Max. memory is 8.0GB. [2022-03-17 11:16:11,023 INFO L158 Benchmark]: Boogie Preprocessor took 19.66ms. Allocated memory is still 187.7MB. Free memory was 161.6MB in the beginning and 160.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-17 11:16:11,024 INFO L158 Benchmark]: RCFGBuilder took 229.52ms. Allocated memory is still 187.7MB. Free memory was 159.9MB in the beginning and 149.8MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-17 11:16:11,024 INFO L158 Benchmark]: TraceAbstraction took 101411.72ms. Allocated memory was 187.7MB in the beginning and 242.2MB in the end (delta: 54.5MB). Free memory was 149.1MB in the beginning and 134.4MB in the end (delta: 14.7MB). Peak memory consumption was 70.8MB. Max. memory is 8.0GB. [2022-03-17 11:16:11,026 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 187.7MB. Free memory is still 152.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 208.64ms. Allocated memory is still 187.7MB. Free memory was 136.3MB in the beginning and 161.6MB in the end (delta: -25.3MB). Peak memory consumption was 12.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.66ms. Allocated memory is still 187.7MB. Free memory was 161.6MB in the beginning and 160.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 229.52ms. Allocated memory is still 187.7MB. Free memory was 159.9MB in the beginning and 149.8MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 101411.72ms. Allocated memory was 187.7MB in the beginning and 242.2MB in the end (delta: 54.5MB). Free memory was 149.1MB in the beginning and 134.4MB in the end (delta: 14.7MB). Peak memory consumption was 70.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 101.4s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 34.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 38.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 148 SdHoareTripleChecker+Valid, 15.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 140 mSDsluCounter, 1422 SdHoareTripleChecker+Invalid, 15.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 105 IncrementalHoareTripleChecker+Unchecked, 1229 mSDsCounter, 100 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1169 IncrementalHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 100 mSolverCounterUnsat, 193 mSDtfsCounter, 1169 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 632 GetRequests, 492 SyntacticMatches, 6 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 32.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=7, InterpolantAutomatonStates: 103, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 43 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 29 PreInvPairs, 50 NumberOfFragments, 259 HoareAnnotationTreeSize, 29 FomulaSimplifications, 792 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 11 FomulaSimplificationsInter, 4653 FormulaSimplificationTreeSizeReductionInter, 38.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 26.3s InterpolantComputationTime, 327 NumberOfCodeBlocks, 309 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 594 ConstructedInterpolants, 6 QuantifiedInterpolants, 3393 SizeOfPredicates, 50 NumberOfNonLiveVariables, 854 ConjunctsInSsa, 128 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 339/426 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant [2022-03-17 11:16:11,041 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-17 11:16:11,041 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-17 11:16:11,041 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-17 11:16:11,042 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] Derived loop invariant: (((((((x <= X || (forall main_~y~0 : int :: 2 * (main_~y~0 * x) + X + v == main_~y~0 * 2 + Y * 2 + 2 * (Y * x))) || !(X == 0)) && X <= 10) && (x <= X || (forall main_~Y~0 : int :: 2 * (y * x) == X * y * 2 + y * 2))) && Y * 2 + 2 * (Y * x) == X * y * 2 + X + v) && 0 <= Y) && 0 <= X) && Y <= 10 RESULT: Ultimate proved your program to be correct! [2022-03-17 11:16:11,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...