/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 22:44:33,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 22:44:33,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 22:44:33,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 22:44:33,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 22:44:33,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 22:44:33,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 22:44:33,306 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 22:44:33,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 22:44:33,317 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 22:44:33,318 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 22:44:33,319 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 22:44:33,320 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 22:44:33,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 22:44:33,321 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 22:44:33,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 22:44:33,322 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 22:44:33,322 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 22:44:33,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 22:44:33,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 22:44:33,325 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 22:44:33,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 22:44:33,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 22:44:33,327 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 22:44:33,328 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 22:44:33,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 22:44:33,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 22:44:33,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 22:44:33,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 22:44:33,344 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 22:44:33,366 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 22:44:33,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 22:44:33,367 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 22:44:33,367 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 22:44:33,368 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 22:44:33,368 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 22:44:33,369 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 22:44:33,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 22:44:33,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 22:44:33,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 22:44:33,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 22:44:33,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 22:44:33,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 22:44:33,371 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 22:44:33,371 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 22:44:33,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 22:44:33,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 22:44:33,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 22:44:33,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 22:44:33,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 22:44:33,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 22:44:33,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 22:44:33,372 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 22:44:33,372 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 22:44:33,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 22:44:33,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 22:44:33,372 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 22:44:33,372 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 22:44:33,373 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 22:44:33,373 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 22:44:33,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 22:44:33,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 22:44:33,585 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 22:44:33,585 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 22:44:33,586 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 22:44:33,587 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound1.c [2022-03-17 22:44:33,633 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1bf6f05a/5952046e151647b196868ebfa97d77e5/FLAG841ad60c0 [2022-03-17 22:44:33,988 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 22:44:33,988 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound1.c [2022-03-17 22:44:33,994 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1bf6f05a/5952046e151647b196868ebfa97d77e5/FLAG841ad60c0 [2022-03-17 22:44:34,409 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1bf6f05a/5952046e151647b196868ebfa97d77e5 [2022-03-17 22:44:34,411 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 22:44:34,412 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 22:44:34,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 22:44:34,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 22:44:34,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 22:44:34,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 10:44:34" (1/1) ... [2022-03-17 22:44:34,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@89d53db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:44:34, skipping insertion in model container [2022-03-17 22:44:34,429 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 10:44:34" (1/1) ... [2022-03-17 22:44:34,433 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 22:44:34,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 22:44:34,551 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/prod4br-ll_valuebound1.c[524,537] [2022-03-17 22:44:34,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 22:44:34,568 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 22:44:34,575 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/prod4br-ll_valuebound1.c[524,537] [2022-03-17 22:44:34,580 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 22:44:34,588 INFO L208 MainTranslator]: Completed translation [2022-03-17 22:44:34,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:44:34 WrapperNode [2022-03-17 22:44:34,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 22:44:34,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 22:44:34,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 22:44:34,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 22:44:34,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:44:34" (1/1) ... [2022-03-17 22:44:34,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:44:34" (1/1) ... [2022-03-17 22:44:34,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:44:34" (1/1) ... [2022-03-17 22:44:34,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:44:34" (1/1) ... [2022-03-17 22:44:34,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:44:34" (1/1) ... [2022-03-17 22:44:34,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:44:34" (1/1) ... [2022-03-17 22:44:34,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:44:34" (1/1) ... [2022-03-17 22:44:34,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 22:44:34,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 22:44:34,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 22:44:34,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 22:44:34,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:44:34" (1/1) ... [2022-03-17 22:44:34,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 22:44:34,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:44:34,632 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 22:44:34,654 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 22:44:34,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 22:44:34,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 22:44:34,661 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 22:44:34,661 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 22:44:34,661 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 22:44:34,661 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 22:44:34,661 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 22:44:34,661 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 22:44:34,661 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 22:44:34,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 22:44:34,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 22:44:34,661 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 22:44:34,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 22:44:34,661 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 22:44:34,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 22:44:34,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 22:44:34,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 22:44:34,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 22:44:34,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 22:44:34,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 22:44:34,700 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 22:44:34,701 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 22:44:34,825 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 22:44:34,829 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 22:44:34,829 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 22:44:34,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 10:44:34 BoogieIcfgContainer [2022-03-17 22:44:34,830 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 22:44:34,831 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 22:44:34,831 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 22:44:34,831 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 22:44:34,841 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 10:44:34" (1/1) ... [2022-03-17 22:44:34,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 10:44:34 BasicIcfg [2022-03-17 22:44:34,864 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 22:44:34,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 22:44:34,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 22:44:34,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 22:44:34,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 10:44:34" (1/4) ... [2022-03-17 22:44:34,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bc71426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 10:44:34, skipping insertion in model container [2022-03-17 22:44:34,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:44:34" (2/4) ... [2022-03-17 22:44:34,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bc71426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 10:44:34, skipping insertion in model container [2022-03-17 22:44:34,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 10:44:34" (3/4) ... [2022-03-17 22:44:34,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bc71426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 10:44:34, skipping insertion in model container [2022-03-17 22:44:34,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 10:44:34" (4/4) ... [2022-03-17 22:44:34,879 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_valuebound1.cqvasr [2022-03-17 22:44:34,882 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 22:44:34,883 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 22:44:34,910 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 22:44:34,914 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 22:44:34,915 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 22:44:34,943 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 22:44:34,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 22:44:34,947 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:44:34,947 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:44:34,948 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:44:34,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:44:34,951 INFO L85 PathProgramCache]: Analyzing trace with hash 574541465, now seen corresponding path program 1 times [2022-03-17 22:44:34,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:44:34,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075900504] [2022-03-17 22:44:34,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:44:34,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:44:35,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:44:35,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 22:44:35,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:44:35,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 22:44:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:44:35,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 22:44:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:44:35,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 22:44:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:44:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 22:44:35,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:44:35,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075900504] [2022-03-17 22:44:35,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075900504] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 22:44:35,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 22:44:35,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 22:44:35,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638664064] [2022-03-17 22:44:35,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 22:44:35,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 22:44:35,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:44:35,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 22:44:35,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 22:44:35,180 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 22:44:35,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:44:35,244 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2022-03-17 22:44:35,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 22:44:35,246 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-17 22:44:35,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:44:35,253 INFO L225 Difference]: With dead ends: 61 [2022-03-17 22:44:35,253 INFO L226 Difference]: Without dead ends: 29 [2022-03-17 22:44:35,255 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 22:44:35,258 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 22:44:35,259 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 22:44:35,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-17 22:44:35,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-17 22:44:35,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 22:44:35,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-03-17 22:44:35,289 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 28 [2022-03-17 22:44:35,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:44:35,290 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-03-17 22:44:35,291 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 22:44:35,291 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-03-17 22:44:35,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 22:44:35,293 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:44:35,293 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:44:35,293 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 22:44:35,294 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:44:35,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:44:35,295 INFO L85 PathProgramCache]: Analyzing trace with hash -2145419015, now seen corresponding path program 1 times [2022-03-17 22:44:35,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:44:35,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996384074] [2022-03-17 22:44:35,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:44:35,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:44:35,325 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:44:35,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895012981] [2022-03-17 22:44:35,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:44:35,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:44:35,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:44:35,331 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 22:44:35,332 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 22:44:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:44:35,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-17 22:44:35,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:44:35,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 22:44:35,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 22:44:35,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:44:35,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996384074] [2022-03-17 22:44:35,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:44:35,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895012981] [2022-03-17 22:44:35,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895012981] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 22:44:35,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 22:44:35,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-17 22:44:35,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412841665] [2022-03-17 22:44:35,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 22:44:35,700 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 22:44:35,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:44:35,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 22:44:35,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-17 22:44:35,701 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 22:44:35,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:44:35,793 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2022-03-17 22:44:35,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 22:44:35,794 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2022-03-17 22:44:35,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:44:35,795 INFO L225 Difference]: With dead ends: 55 [2022-03-17 22:44:35,795 INFO L226 Difference]: Without dead ends: 41 [2022-03-17 22:44:35,795 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-17 22:44:35,796 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 41 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 22:44:35,797 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 140 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 22:44:35,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-17 22:44:35,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2022-03-17 22:44:35,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 22:44:35,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2022-03-17 22:44:35,804 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 28 [2022-03-17 22:44:35,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:44:35,804 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2022-03-17 22:44:35,804 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 22:44:35,805 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2022-03-17 22:44:35,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-17 22:44:35,805 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:44:35,805 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:44:35,824 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 22:44:36,017 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 22:44:36,017 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:44:36,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:44:36,018 INFO L85 PathProgramCache]: Analyzing trace with hash -257170002, now seen corresponding path program 1 times [2022-03-17 22:44:36,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:44:36,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742119137] [2022-03-17 22:44:36,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:44:36,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:44:36,028 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:44:36,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428375031] [2022-03-17 22:44:36,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:44:36,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:44:36,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:44:36,030 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 22:44:36,031 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 22:44:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:44:36,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-17 22:44:36,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:44:36,166 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 22:44:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-17 22:44:36,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:44:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 22:44:36,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:44:36,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742119137] [2022-03-17 22:44:36,649 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:44:36,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428375031] [2022-03-17 22:44:36,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428375031] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 22:44:36,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 22:44:36,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-03-17 22:44:36,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942310898] [2022-03-17 22:44:36,651 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 22:44:36,652 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-17 22:44:36,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:44:36,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-17 22:44:36,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-17 22:44:36,653 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 22:44:38,585 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 22:44:40,873 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 22:44:40,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:44:40,878 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2022-03-17 22:44:40,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 22:44:40,879 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 34 [2022-03-17 22:44:40,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:44:40,881 INFO L225 Difference]: With dead ends: 49 [2022-03-17 22:44:40,881 INFO L226 Difference]: Without dead ends: 45 [2022-03-17 22:44:40,881 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-03-17 22:44:40,882 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-03-17 22:44:40,882 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 200 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2022-03-17 22:44:40,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-17 22:44:40,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-03-17 22:44:40,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 22:44:40,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-03-17 22:44:40,888 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 34 [2022-03-17 22:44:40,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:44:40,888 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-03-17 22:44:40,888 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 22:44:40,888 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-03-17 22:44:40,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-17 22:44:40,889 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:44:40,889 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:44:40,917 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 22:44:41,115 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 22:44:41,116 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:44:41,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:44:41,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1424936990, now seen corresponding path program 1 times [2022-03-17 22:44:41,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:44:41,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996259770] [2022-03-17 22:44:41,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:44:41,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:44:41,126 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:44:41,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [695973843] [2022-03-17 22:44:41,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:44:41,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:44:41,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:44:41,127 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 22:44:41,128 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 22:44:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:44:41,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-17 22:44:41,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:44:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-17 22:44:41,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:44:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-17 22:44:41,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:44:41,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996259770] [2022-03-17 22:44:41,398 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:44:41,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695973843] [2022-03-17 22:44:41,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695973843] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 22:44:41,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 22:44:41,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-03-17 22:44:41,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141571503] [2022-03-17 22:44:41,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 22:44:41,399 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 22:44:41,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:44:41,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 22:44:41,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-17 22:44:41,400 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-17 22:44:41,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:44:41,455 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2022-03-17 22:44:41,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 22:44:41,456 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 38 [2022-03-17 22:44:41,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:44:41,456 INFO L225 Difference]: With dead ends: 60 [2022-03-17 22:44:41,456 INFO L226 Difference]: Without dead ends: 42 [2022-03-17 22:44:41,457 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-17 22:44:41,457 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 16 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 22:44:41,458 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 116 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 22:44:41,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-17 22:44:41,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-03-17 22:44:41,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 28 states have internal predecessors, (30), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 22:44:41,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-03-17 22:44:41,463 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 38 [2022-03-17 22:44:41,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:44:41,463 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-03-17 22:44:41,463 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-17 22:44:41,463 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-03-17 22:44:41,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-17 22:44:41,464 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:44:41,464 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:44:41,483 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 22:44:41,684 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 22:44:41,684 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:44:41,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:44:41,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1396307839, now seen corresponding path program 1 times [2022-03-17 22:44:41,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:44:41,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085234897] [2022-03-17 22:44:41,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:44:41,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:44:41,694 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:44:41,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080238383] [2022-03-17 22:44:41,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:44:41,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:44:41,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:44:41,695 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 22:44:41,696 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 22:44:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:44:41,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-17 22:44:41,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:44:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-17 22:44:42,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:44:42,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 22:44:42,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:44:42,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085234897] [2022-03-17 22:44:42,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:44:42,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080238383] [2022-03-17 22:44:42,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080238383] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 22:44:42,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 22:44:42,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2022-03-17 22:44:42,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337500669] [2022-03-17 22:44:42,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 22:44:42,249 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-17 22:44:42,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:44:42,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-17 22:44:42,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-17 22:44:42,250 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-17 22:44:42,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:44:42,396 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2022-03-17 22:44:42,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 22:44:42,397 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 38 [2022-03-17 22:44:42,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:44:42,397 INFO L225 Difference]: With dead ends: 56 [2022-03-17 22:44:42,397 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 22:44:42,398 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-03-17 22:44:42,398 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 26 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 22:44:42,398 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 171 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 22:44:42,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 22:44:42,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 22:44:42,399 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 22:44:42,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 22:44:42,399 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2022-03-17 22:44:42,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:44:42,399 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 22:44:42,399 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-17 22:44:42,400 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 22:44:42,400 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 22:44:42,401 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 22:44:42,420 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 22:44:42,605 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 22:44:42,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-17 22:44:42,916 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 22:44:42,916 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-17 22:44:42,917 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-17 22:44:42,917 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-17 22:44:42,917 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-17 22:44:42,917 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-17 22:44:42,917 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-17 22:44:42,917 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2022-03-17 22:44:42,917 INFO L882 garLoopResultBuilder]: For program point L9(line 9) no Hoare annotation was computed. [2022-03-17 22:44:42,917 INFO L882 garLoopResultBuilder]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2022-03-17 22:44:42,917 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2022-03-17 22:44:42,917 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 19 60) the Hoare annotation is: true [2022-03-17 22:44:42,917 INFO L885 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: true [2022-03-17 22:44:42,917 INFO L882 garLoopResultBuilder]: For program point L24-1(line 24) no Hoare annotation was computed. [2022-03-17 22:44:42,917 INFO L878 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 1)) [2022-03-17 22:44:42,917 INFO L878 garLoopResultBuilder]: At program point L26-1(line 26) the Hoare annotation is: (and (<= 0 main_~y~0) (<= 0 main_~x~0) (<= main_~x~0 1) (<= main_~y~0 1)) [2022-03-17 22:44:42,918 INFO L882 garLoopResultBuilder]: For program point L27(line 27) no Hoare annotation was computed. [2022-03-17 22:44:42,918 INFO L878 garLoopResultBuilder]: At program point L47-2(lines 34 55) the Hoare annotation is: (let ((.cse0 (<= main_~x~0 1)) (.cse1 (<= 0 main_~a~0)) (.cse2 (<= main_~y~0 1)) (.cse3 (= main_~p~0 1))) (or (and (<= 0 main_~y~0) (not (= main_~y~0 0)) .cse0 .cse1 (= (+ main_~a~0 1) main_~x~0) (= main_~q~0 (+ (* main_~b~0 main_~p~0) (* main_~a~0 main_~p~0) main_~p~0)) (= (+ main_~b~0 1) main_~y~0) .cse2 .cse3) (and .cse0 (= main_~b~0 main_~y~0) .cse1 (= main_~q~0 0) (<= 1 main_~y~0) (= main_~a~0 main_~x~0) .cse2 .cse3))) [2022-03-17 22:44:42,918 INFO L878 garLoopResultBuilder]: At program point L34-2(lines 34 55) the Hoare annotation is: (let ((.cse0 (<= 1 main_~y~0)) (.cse1 (<= main_~y~0 1))) (or (and (= main_~a~0 0) (<= 1 main_~p~0) (<= 0 main_~x~0) (<= main_~q~0 0) (= main_~q~0 (* main_~y~0 main_~x~0)) (<= main_~y~0 main_~b~0) .cse0 .cse1) (and (<= main_~x~0 1) (<= 0 main_~a~0) (= (+ main_~a~0 1) main_~x~0) (= main_~q~0 (+ (* main_~b~0 main_~p~0) (* main_~a~0 main_~p~0) main_~p~0)) .cse0 (= (+ main_~b~0 1) main_~y~0) .cse1 (= main_~p~0 1)))) [2022-03-17 22:44:42,918 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (<= main_~x~0 1)) (.cse1 (<= 0 main_~a~0)) (.cse2 (<= main_~y~0 1)) (.cse3 (= main_~p~0 1))) (or (and (<= 0 main_~y~0) (not (= main_~y~0 0)) .cse0 .cse1 (= (+ main_~a~0 1) main_~x~0) (= main_~q~0 (+ (* main_~b~0 main_~p~0) (* main_~a~0 main_~p~0) main_~p~0)) (= (+ main_~b~0 1) main_~y~0) .cse2 .cse3) (and .cse0 (= main_~b~0 main_~y~0) .cse1 (= main_~q~0 0) (<= 1 main_~y~0) (= main_~a~0 main_~x~0) .cse2 .cse3))) [2022-03-17 22:44:42,918 INFO L878 garLoopResultBuilder]: At program point L57(line 57) the Hoare annotation is: (let ((.cse0 (<= 1 main_~y~0)) (.cse1 (<= main_~y~0 1))) (or (and (= main_~a~0 0) (<= 1 main_~p~0) (<= 0 main_~x~0) (<= main_~q~0 0) (= main_~q~0 (* main_~y~0 main_~x~0)) (<= main_~y~0 main_~b~0) .cse0 .cse1) (and (<= main_~x~0 1) (<= 0 main_~a~0) (= (+ main_~a~0 1) main_~x~0) (= main_~q~0 (+ (* main_~b~0 main_~p~0) (* main_~a~0 main_~p~0) main_~p~0)) .cse0 (= (+ main_~b~0 1) main_~y~0) .cse1 (= main_~p~0 1)))) [2022-03-17 22:44:42,918 INFO L882 garLoopResultBuilder]: For program point L35-1(lines 34 55) no Hoare annotation was computed. [2022-03-17 22:44:42,918 INFO L882 garLoopResultBuilder]: For program point L58(line 58) no Hoare annotation was computed. [2022-03-17 22:44:42,918 INFO L882 garLoopResultBuilder]: For program point L40(lines 40 54) no Hoare annotation was computed. [2022-03-17 22:44:42,918 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 19 60) no Hoare annotation was computed. [2022-03-17 22:44:42,918 INFO L882 garLoopResultBuilder]: For program point L44(lines 44 54) no Hoare annotation was computed. [2022-03-17 22:44:42,918 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 19 60) no Hoare annotation was computed. [2022-03-17 22:44:42,918 INFO L882 garLoopResultBuilder]: For program point L47(lines 47 54) no Hoare annotation was computed. [2022-03-17 22:44:42,918 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-03-17 22:44:42,919 INFO L882 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2022-03-17 22:44:42,919 INFO L882 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2022-03-17 22:44:42,919 INFO L882 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2022-03-17 22:44:42,919 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2022-03-17 22:44:42,919 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2022-03-17 22:44:42,921 INFO L718 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-03-17 22:44:42,922 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 22:44:42,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 10:44:42 BasicIcfg [2022-03-17 22:44:42,930 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 22:44:42,931 INFO L158 Benchmark]: Toolchain (without parser) took 8518.84ms. Allocated memory was 179.3MB in the beginning and 216.0MB in the end (delta: 36.7MB). Free memory was 127.9MB in the beginning and 93.1MB in the end (delta: 34.8MB). Peak memory consumption was 72.4MB. Max. memory is 8.0GB. [2022-03-17 22:44:42,931 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 179.3MB. Free memory is still 144.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 22:44:42,931 INFO L158 Benchmark]: CACSL2BoogieTranslator took 165.61ms. Allocated memory is still 179.3MB. Free memory was 127.7MB in the beginning and 155.9MB in the end (delta: -28.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-17 22:44:42,931 INFO L158 Benchmark]: Boogie Preprocessor took 18.83ms. Allocated memory is still 179.3MB. Free memory was 155.9MB in the beginning and 154.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-17 22:44:42,931 INFO L158 Benchmark]: RCFGBuilder took 221.29ms. Allocated memory is still 179.3MB. Free memory was 154.3MB in the beginning and 142.7MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-17 22:44:42,932 INFO L158 Benchmark]: IcfgTransformer took 33.25ms. Allocated memory is still 179.3MB. Free memory was 142.7MB in the beginning and 141.7MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 22:44:42,932 INFO L158 Benchmark]: TraceAbstraction took 8062.97ms. Allocated memory was 179.3MB in the beginning and 216.0MB in the end (delta: 36.7MB). Free memory was 141.2MB in the beginning and 93.1MB in the end (delta: 48.1MB). Peak memory consumption was 86.3MB. Max. memory is 8.0GB. [2022-03-17 22:44:42,933 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 179.3MB. Free memory is still 144.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 165.61ms. Allocated memory is still 179.3MB. Free memory was 127.7MB in the beginning and 155.9MB in the end (delta: -28.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.83ms. Allocated memory is still 179.3MB. Free memory was 155.9MB in the beginning and 154.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 221.29ms. Allocated memory is still 179.3MB. Free memory was 154.3MB in the beginning and 142.7MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 33.25ms. Allocated memory is still 179.3MB. Free memory was 142.7MB in the beginning and 141.7MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 8062.97ms. Allocated memory was 179.3MB in the beginning and 216.0MB in the end (delta: 36.7MB). Free memory was 141.2MB in the beginning and 93.1MB in the end (delta: 48.1MB). Peak memory consumption was 86.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: 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 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.0s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 152 SdHoareTripleChecker+Valid, 4.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 136 mSDsluCounter, 665 SdHoareTripleChecker+Invalid, 4.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 544 mSDsCounter, 67 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 558 IncrementalHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 67 mSolverCounterUnsat, 121 mSDtfsCounter, 558 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 273 GetRequests, 211 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=3, InterpolantAutomatonStates: 44, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 13 LocationsWithAnnotation, 34 PreInvPairs, 44 NumberOfFragments, 293 HoareAnnotationTreeSize, 34 FomulaSimplifications, 72 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 13 FomulaSimplificationsInter, 378 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 166 NumberOfCodeBlocks, 166 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 268 ConstructedInterpolants, 0 QuantifiedInterpolants, 1125 SizeOfPredicates, 18 NumberOfNonLiveVariables, 421 ConjunctsInSsa, 90 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 92/116 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: 34]: Loop Invariant Derived loop invariant: ((((((((0 <= y && !(y == 0)) && x <= 1) && 0 <= a) && a + 1 == x) && q == b * p + a * p + p) && b + 1 == y) && y <= 1) && p == 1) || (((((((x <= 1 && b == y) && 0 <= a) && q == 0) && 1 <= y) && a == x) && y <= 1) && p == 1) RESULT: Ultimate proved your program to be correct! [2022-03-17 22:44:42,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...