/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 02:13:00,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 02:13:00,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 02:13:00,781 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 02:13:00,782 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 02:13:00,782 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 02:13:00,783 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 02:13:00,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 02:13:00,785 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 02:13:00,786 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 02:13:00,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 02:13:00,787 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 02:13:00,787 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 02:13:00,788 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 02:13:00,789 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 02:13:00,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 02:13:00,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 02:13:00,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 02:13:00,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 02:13:00,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 02:13:00,794 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 02:13:00,801 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 02:13:00,803 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 02:13:00,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 02:13:00,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 02:13:00,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-18 02:13:00,809 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-18 02:13:00,809 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-18 02:13:00,810 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-18 02:13:00,810 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-18 02:13:00,811 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-18 02:13:00,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-18 02:13:00,811 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-18 02:13:00,813 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-18 02:13:00,815 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-18 02:13:00,816 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-18 02:13:00,817 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-18 02:13:00,817 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-18 02:13:00,817 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-18 02:13:00,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 02:13:00,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 02:13:00,819 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 02:13:00,820 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 02:13:00,828 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 02:13:00,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 02:13:00,830 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 02:13:00,830 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 02:13:00,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 02:13:00,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 02:13:00,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 02:13:00,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 02:13:00,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 02:13:00,831 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 02:13:00,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 02:13:00,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 02:13:00,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 02:13:00,831 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 02:13:00,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 02:13:00,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 02:13:00,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 02:13:00,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 02:13:00,832 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 02:13:00,832 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 02:13:00,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 02:13:00,832 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 02:13:00,832 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 02:13:01,023 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 02:13:01,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 02:13:01,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 02:13:01,040 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 02:13:01,047 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 02:13:01,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound1.i [2022-03-18 02:13:01,119 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fff3a368a/30706f6850354dcba790766bd4778e27/FLAG86bea912b [2022-03-18 02:13:01,483 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 02:13:01,484 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound1.i [2022-03-18 02:13:01,502 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fff3a368a/30706f6850354dcba790766bd4778e27/FLAG86bea912b [2022-03-18 02:13:01,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fff3a368a/30706f6850354dcba790766bd4778e27 [2022-03-18 02:13:01,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 02:13:01,513 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 02:13:01,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 02:13:01,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 02:13:01,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 02:13:01,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:13:01" (1/1) ... [2022-03-18 02:13:01,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11e990c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:13:01, skipping insertion in model container [2022-03-18 02:13:01,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:13:01" (1/1) ... [2022-03-18 02:13:01,531 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 02:13:01,558 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 02:13:01,712 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/divbin2_valuebound1.i[951,964] [2022-03-18 02:13:01,729 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 02:13:01,736 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 02:13:01,746 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/divbin2_valuebound1.i[951,964] [2022-03-18 02:13:01,758 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 02:13:01,772 INFO L208 MainTranslator]: Completed translation [2022-03-18 02:13:01,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:13:01 WrapperNode [2022-03-18 02:13:01,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 02:13:01,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 02:13:01,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 02:13:01,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 02:13:01,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:13:01" (1/1) ... [2022-03-18 02:13:01,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:13:01" (1/1) ... [2022-03-18 02:13:01,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:13:01" (1/1) ... [2022-03-18 02:13:01,791 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:13:01" (1/1) ... [2022-03-18 02:13:01,802 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:13:01" (1/1) ... [2022-03-18 02:13:01,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:13:01" (1/1) ... [2022-03-18 02:13:01,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:13:01" (1/1) ... [2022-03-18 02:13:01,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 02:13:01,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 02:13:01,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 02:13:01,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 02:13:01,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:13:01" (1/1) ... [2022-03-18 02:13:01,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 02:13:01,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:13:01,885 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) [2022-03-18 02:13:01,951 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 [2022-03-18 02:13:01,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 02:13:01,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 02:13:01,962 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 02:13:01,962 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 02:13:01,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 02:13:01,962 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 02:13:01,962 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 02:13:01,962 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 02:13:01,962 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-18 02:13:01,962 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-18 02:13:01,962 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 02:13:01,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 02:13:01,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-18 02:13:01,962 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 02:13:01,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 02:13:01,963 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 02:13:01,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 02:13:01,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 02:13:01,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 02:13:01,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 02:13:01,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 02:13:01,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 02:13:02,029 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 02:13:02,030 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 02:13:02,128 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 02:13:02,133 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 02:13:02,133 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 02:13:02,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:13:02 BoogieIcfgContainer [2022-03-18 02:13:02,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 02:13:02,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 02:13:02,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 02:13:02,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 02:13:02,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 02:13:01" (1/3) ... [2022-03-18 02:13:02,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8506f25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:13:02, skipping insertion in model container [2022-03-18 02:13:02,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:13:01" (2/3) ... [2022-03-18 02:13:02,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8506f25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:13:02, skipping insertion in model container [2022-03-18 02:13:02,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:13:02" (3/3) ... [2022-03-18 02:13:02,154 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound1.i [2022-03-18 02:13:02,158 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 02:13:02,158 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 02:13:02,220 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 02:13:02,233 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 02:13:02,233 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 02:13:02,264 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 02:13:02,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 02:13:02,269 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:13:02,269 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:13:02,270 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:13:02,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:13:02,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1171333446, now seen corresponding path program 1 times [2022-03-18 02:13:02,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:13:02,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [140380842] [2022-03-18 02:13:02,310 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:13:02,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1171333446, now seen corresponding path program 2 times [2022-03-18 02:13:02,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:13:02,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831920463] [2022-03-18 02:13:02,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:13:02,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:13:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:13:02,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 02:13:02,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:13:02,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 02:13:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:13:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 02:13:02,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:13:02,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831920463] [2022-03-18 02:13:02,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831920463] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:13:02,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:13:02,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 02:13:02,493 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:13:02,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [140380842] [2022-03-18 02:13:02,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [140380842] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:13:02,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:13:02,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 02:13:02,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234364880] [2022-03-18 02:13:02,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:13:02,498 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 02:13:02,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:13:02,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 02:13:02,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 02:13:02,520 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 02:13:02,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:13:02,583 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2022-03-18 02:13:02,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 02:13:02,585 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-18 02:13:02,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:13:02,592 INFO L225 Difference]: With dead ends: 51 [2022-03-18 02:13:02,592 INFO L226 Difference]: Without dead ends: 25 [2022-03-18 02:13:02,595 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 02:13:02,598 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:13:02,599 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 33 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:13:02,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-18 02:13:02,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-18 02:13:02,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 02:13:02,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-03-18 02:13:02,630 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2022-03-18 02:13:02,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:13:02,631 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-03-18 02:13:02,631 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 02:13:02,631 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-03-18 02:13:02,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-18 02:13:02,632 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:13:02,632 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:13:02,633 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 02:13:02,633 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:13:02,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:13:02,634 INFO L85 PathProgramCache]: Analyzing trace with hash -73515422, now seen corresponding path program 1 times [2022-03-18 02:13:02,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:13:02,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [424356348] [2022-03-18 02:13:02,641 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:13:02,642 INFO L85 PathProgramCache]: Analyzing trace with hash -73515422, now seen corresponding path program 2 times [2022-03-18 02:13:02,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:13:02,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258544548] [2022-03-18 02:13:02,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:13:02,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:13:02,662 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:13:02,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359032685] [2022-03-18 02:13:02,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:13:02,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:13:02,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:13:02,666 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) [2022-03-18 02:13:02,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 02:13:02,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 02:13:02,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:13:02,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 02:13:02,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:13:02,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 02:13:02,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:13:02,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:13:02,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258544548] [2022-03-18 02:13:02,902 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:13:02,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359032685] [2022-03-18 02:13:02,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359032685] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:13:02,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:13:02,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:13:02,904 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:13:02,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [424356348] [2022-03-18 02:13:02,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [424356348] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:13:02,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:13:02,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:13:02,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197756196] [2022-03-18 02:13:02,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:13:02,905 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:13:02,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:13:02,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:13:02,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:13:02,906 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 02:13:02,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:13:02,994 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-03-18 02:13:02,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 02:13:02,995 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-03-18 02:13:02,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:13:02,995 INFO L225 Difference]: With dead ends: 37 [2022-03-18 02:13:02,996 INFO L226 Difference]: Without dead ends: 34 [2022-03-18 02:13:02,996 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-18 02:13:02,997 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 21 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:13:02,997 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 116 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:13:02,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-18 02:13:03,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-18 02:13:03,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 02:13:03,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-03-18 02:13:03,004 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 19 [2022-03-18 02:13:03,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:13:03,005 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-03-18 02:13:03,005 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 02:13:03,005 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-03-18 02:13:03,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-18 02:13:03,005 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:13:03,005 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:13:03,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 02:13:03,222 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 [2022-03-18 02:13:03,223 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:13:03,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:13:03,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1211706883, now seen corresponding path program 1 times [2022-03-18 02:13:03,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:13:03,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [495946278] [2022-03-18 02:13:03,270 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 02:13:03,271 INFO L85 PathProgramCache]: Analyzing trace with hash -2069278597, now seen corresponding path program 1 times [2022-03-18 02:13:03,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:13:03,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359186434] [2022-03-18 02:13:03,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:13:03,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:13:03,303 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:13:03,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709381645] [2022-03-18 02:13:03,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:13:03,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:13:03,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:13:03,332 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) [2022-03-18 02:13:03,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 02:13:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:13:03,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 02:13:03,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:13:03,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 02:13:03,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:13:03,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:13:03,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359186434] [2022-03-18 02:13:03,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:13:03,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709381645] [2022-03-18 02:13:03,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709381645] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:13:03,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:13:03,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:13:03,704 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:13:03,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [495946278] [2022-03-18 02:13:03,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [495946278] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:13:03,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:13:03,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:13:03,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681903846] [2022-03-18 02:13:03,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:13:03,705 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 02:13:03,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:13:03,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 02:13:03,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-18 02:13:03,706 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 02:13:05,839 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 02:13:07,928 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 02:13:10,005 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 02:13:10,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:13:10,106 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2022-03-18 02:13:10,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 02:13:10,107 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-03-18 02:13:10,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:13:10,108 INFO L225 Difference]: With dead ends: 46 [2022-03-18 02:13:10,108 INFO L226 Difference]: Without dead ends: 32 [2022-03-18 02:13:10,108 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:13:10,109 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:13:10,109 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 172 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 3 Unknown, 0 Unchecked, 6.3s Time] [2022-03-18 02:13:10,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-18 02:13:10,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-18 02:13:10,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 02:13:10,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-03-18 02:13:10,114 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 21 [2022-03-18 02:13:10,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:13:10,114 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-03-18 02:13:10,115 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 02:13:10,115 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-03-18 02:13:10,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 02:13:10,115 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:13:10,115 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, 1, 1, 1, 1] [2022-03-18 02:13:10,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 02:13:10,316 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 [2022-03-18 02:13:10,316 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:13:10,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:13:10,317 INFO L85 PathProgramCache]: Analyzing trace with hash 947727214, now seen corresponding path program 1 times [2022-03-18 02:13:10,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:13:10,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1463971756] [2022-03-18 02:13:10,317 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 02:13:10,317 INFO L85 PathProgramCache]: Analyzing trace with hash 947727214, now seen corresponding path program 2 times [2022-03-18 02:13:10,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:13:10,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588857892] [2022-03-18 02:13:10,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:13:10,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:13:10,324 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:13:10,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [25799076] [2022-03-18 02:13:10,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:13:10,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:13:10,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:13:10,327 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) [2022-03-18 02:13:10,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 02:13:10,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:13:10,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:13:10,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 02:13:10,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:13:10,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 02:13:10,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:13:10,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:13:10,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588857892] [2022-03-18 02:13:10,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:13:10,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25799076] [2022-03-18 02:13:10,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25799076] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:13:10,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:13:10,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 02:13:10,452 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:13:10,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1463971756] [2022-03-18 02:13:10,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1463971756] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:13:10,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:13:10,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 02:13:10,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269376595] [2022-03-18 02:13:10,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:13:10,452 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 02:13:10,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:13:10,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 02:13:10,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 02:13:10,453 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:13:10,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:13:10,463 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-03-18 02:13:10,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 02:13:10,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-03-18 02:13:10,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:13:10,465 INFO L225 Difference]: With dead ends: 32 [2022-03-18 02:13:10,465 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 02:13:10,466 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 02:13:10,467 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:13:10,467 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:13:10,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 02:13:10,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 02:13:10,468 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) [2022-03-18 02:13:10,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 02:13:10,468 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2022-03-18 02:13:10,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:13:10,468 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 02:13:10,468 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:13:10,468 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 02:13:10,468 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 02:13:10,470 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 02:13:10,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 02:13:10,673 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 [2022-03-18 02:13:10,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-18 02:13:10,993 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2022-03-18 02:13:10,993 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2022-03-18 02:13:10,993 INFO L882 garLoopResultBuilder]: For program point L12-1(line 12) no Hoare annotation was computed. [2022-03-18 02:13:10,993 INFO L878 garLoopResultBuilder]: At program point L16(line 16) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-03-18 02:13:10,993 INFO L878 garLoopResultBuilder]: At program point L16-2(lines 15 17) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-18 02:13:10,993 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 15 17) the Hoare annotation is: true [2022-03-18 02:13:10,993 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 15 17) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-18 02:13:10,994 INFO L885 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: true [2022-03-18 02:13:10,994 INFO L878 garLoopResultBuilder]: At program point L29-1(line 29) the Hoare annotation is: (<= (mod main_~A~0 4294967296) 1) [2022-03-18 02:13:10,994 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 25 50) the Hoare annotation is: true [2022-03-18 02:13:10,994 INFO L885 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: true [2022-03-18 02:13:10,994 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 25 50) the Hoare annotation is: true [2022-03-18 02:13:10,994 INFO L878 garLoopResultBuilder]: At program point L38-1(lines 38 47) the Hoare annotation is: (and (= main_~b~0 1) (= main_~A~0 main_~r~0) (< (mod main_~r~0 4294967296) (mod main_~b~0 4294967296)) (= main_~q~0 0)) [2022-03-18 02:13:10,994 INFO L878 garLoopResultBuilder]: At program point L34-2(lines 34 37) the Hoare annotation is: (let ((.cse5 (div (- main_~b~0) (- 2))) (.cse6 (mod main_~r~0 4294967296))) (let ((.cse1 (<= (mod main_~A~0 4294967296) 1)) (.cse0 (= main_~A~0 main_~r~0)) (.cse3 (<= (mod .cse5 4294967296) .cse6)) (.cse4 (= (mod main_~b~0 2) 0)) (.cse2 (= main_~q~0 0))) (or (and .cse0 .cse1 (= main_~B~0 main_~b~0) .cse2 (= main_~B~0 1)) (and .cse0 (= (div (* (- 1) main_~b~0) (- 2)) 1) .cse3 .cse1 .cse4 .cse2) (and (= main_~r~0 0) .cse0 .cse3 .cse4 (<= (mod (div (- .cse5) (- 2)) 4294967296) .cse6) .cse2)))) [2022-03-18 02:13:10,994 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 25 50) the Hoare annotation is: true [2022-03-18 02:13:10,994 INFO L878 garLoopResultBuilder]: At program point L43(lines 43 46) the Hoare annotation is: false [2022-03-18 02:13:10,994 INFO L878 garLoopResultBuilder]: At program point L43-2(lines 25 50) the Hoare annotation is: (and (= main_~A~0 main_~r~0) (< (mod main_~r~0 4294967296) (mod main_~b~0 4294967296)) (= main_~B~0 main_~b~0) (= main_~q~0 0) (= main_~B~0 1)) [2022-03-18 02:13:10,994 INFO L878 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (and (= main_~A~0 main_~r~0) (< (mod main_~r~0 4294967296) (mod main_~b~0 4294967296)) (= main_~B~0 main_~b~0) (= main_~q~0 0) (= main_~B~0 1)) [2022-03-18 02:13:10,995 INFO L878 garLoopResultBuilder]: At program point L39-1(lines 38 47) the Hoare annotation is: (and (= main_~A~0 main_~r~0) (< (mod main_~r~0 4294967296) (mod main_~b~0 4294967296)) (= main_~B~0 main_~b~0) (= main_~q~0 0) (= main_~B~0 1)) [2022-03-18 02:13:10,995 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (= main_~A~0 main_~r~0)) (.cse1 (= main_~q~0 0))) (or (and .cse0 (<= (mod main_~A~0 4294967296) 1) (= main_~B~0 main_~b~0) .cse1 (= main_~B~0 1)) (let ((.cse2 (div (- main_~b~0) (- 2))) (.cse3 (mod main_~r~0 4294967296))) (and (= main_~r~0 0) .cse0 (<= (mod .cse2 4294967296) .cse3) (= (mod main_~b~0 2) 0) (<= (mod (div (- .cse2) (- 2)) 4294967296) .cse3) .cse1)))) [2022-03-18 02:13:10,995 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-18 02:13:10,995 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|)) [2022-03-18 02:13:10,995 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-18 02:13:10,995 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-18 02:13:10,995 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-18 02:13:10,995 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-18 02:13:10,995 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-18 02:13:10,995 INFO L878 garLoopResultBuilder]: At program point L19-2(lines 18 24) the Hoare annotation is: (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) [2022-03-18 02:13:10,995 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 18 24) the Hoare annotation is: true [2022-03-18 02:13:10,995 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 18 24) the Hoare annotation is: (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) [2022-03-18 02:13:10,995 INFO L878 garLoopResultBuilder]: At program point L20(lines 20 21) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-18 02:13:10,995 INFO L878 garLoopResultBuilder]: At program point L19(lines 19 22) the Hoare annotation is: (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) [2022-03-18 02:13:10,996 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-18 02:13:10,998 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1] [2022-03-18 02:13:10,999 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 02:13:11,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 02:13:11 BoogieIcfgContainer [2022-03-18 02:13:11,012 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 02:13:11,013 INFO L158 Benchmark]: Toolchain (without parser) took 9499.36ms. Allocated memory was 199.2MB in the beginning and 239.1MB in the end (delta: 39.8MB). Free memory was 146.2MB in the beginning and 143.7MB in the end (delta: 2.5MB). Peak memory consumption was 42.3MB. Max. memory is 8.0GB. [2022-03-18 02:13:11,014 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 199.2MB. Free memory was 162.8MB in the beginning and 162.8MB in the end (delta: 64.7kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 02:13:11,014 INFO L158 Benchmark]: CACSL2BoogieTranslator took 258.74ms. Allocated memory is still 199.2MB. Free memory was 146.0MB in the beginning and 172.6MB in the end (delta: -26.6MB). Peak memory consumption was 5.1MB. Max. memory is 8.0GB. [2022-03-18 02:13:11,014 INFO L158 Benchmark]: Boogie Preprocessor took 42.70ms. Allocated memory is still 199.2MB. Free memory was 172.6MB in the beginning and 171.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-18 02:13:11,014 INFO L158 Benchmark]: RCFGBuilder took 330.48ms. Allocated memory is still 199.2MB. Free memory was 171.0MB in the beginning and 160.8MB in the end (delta: 10.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-18 02:13:11,015 INFO L158 Benchmark]: TraceAbstraction took 8863.48ms. Allocated memory was 199.2MB in the beginning and 239.1MB in the end (delta: 39.8MB). Free memory was 160.3MB in the beginning and 143.7MB in the end (delta: 16.6MB). Peak memory consumption was 57.0MB. Max. memory is 8.0GB. [2022-03-18 02:13:11,016 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 199.2MB. Free memory was 162.8MB in the beginning and 162.8MB in the end (delta: 64.7kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 258.74ms. Allocated memory is still 199.2MB. Free memory was 146.0MB in the beginning and 172.6MB in the end (delta: -26.6MB). Peak memory consumption was 5.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 42.70ms. Allocated memory is still 199.2MB. Free memory was 172.6MB in the beginning and 171.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 330.48ms. Allocated memory is still 199.2MB. Free memory was 171.0MB in the beginning and 160.8MB in the end (delta: 10.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 8863.48ms. Allocated memory was 199.2MB in the beginning and 239.1MB in the end (delta: 39.8MB). Free memory was 160.3MB in the beginning and 143.7MB in the end (delta: 16.6MB). Peak memory consumption was 57.0MB. 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: 21]: 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, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.8s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 6.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 59 SdHoareTripleChecker+Valid, 6.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 53 mSDsluCounter, 354 SdHoareTripleChecker+Invalid, 6.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 264 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 166 IncrementalHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 90 mSDtfsCounter, 166 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=2, InterpolantAutomatonStates: 26, 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 30 LocationsWithAnnotation, 72 PreInvPairs, 99 NumberOfFragments, 302 HoareAnnotationTreeSize, 72 FomulaSimplifications, 46 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 30 FomulaSimplificationsInter, 55 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((A == r && A % 4294967296 <= 1) && B == b) && q == 0) && B == 1) || (((((A == r && -1 * b / -2 == 1) && -b / -2 % 4294967296 <= r % 4294967296) && A % 4294967296 <= 1) && b % 2 == 0) && q == 0)) || (((((r == 0 && A == r) && -b / -2 % 4294967296 <= r % 4294967296) && b % 2 == 0) && -(-b / -2) / -2 % 4294967296 <= r % 4294967296) && q == 0) - ProcedureContractResult [Line: 15]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 25]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 18]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: !(1 <= \old(cond)) || 1 <= cond RESULT: Ultimate proved your program to be correct! [2022-03-18 02:13:11,040 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...