/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/cohendiv-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 20:06:13,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 20:06:13,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 20:06:13,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 20:06:13,873 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 20:06:13,874 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 20:06:13,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 20:06:13,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 20:06:13,883 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 20:06:13,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 20:06:13,887 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 20:06:13,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 20:06:13,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 20:06:13,890 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 20:06:13,891 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 20:06:13,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 20:06:13,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 20:06:13,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 20:06:13,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 20:06:13,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 20:06:13,901 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 20:06:13,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 20:06:13,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 20:06:13,903 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 20:06:13,904 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 20:06:13,908 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 20:06:13,909 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 20:06:13,909 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 20:06:13,909 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 20:06:13,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 20:06:13,911 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 20:06:13,911 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 20:06:13,912 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 20:06:13,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 20:06:13,913 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 20:06:13,913 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 20:06:13,913 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 20:06:13,914 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 20:06:13,914 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 20:06:13,914 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 20:06:13,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 20:06:13,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 20:06:13,916 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 20:06:13,922 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 20:06:13,922 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 20:06:13,924 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 20:06:13,924 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 20:06:13,924 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 20:06:13,924 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 20:06:13,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 20:06:13,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 20:06:13,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 20:06:13,925 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 20:06:13,925 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 20:06:13,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 20:06:13,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 20:06:13,925 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 20:06:13,926 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 20:06:13,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 20:06:13,926 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 20:06:13,926 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 20:06:13,926 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 20:06:13,926 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 20:06:13,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 20:06:13,926 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 20:06:13,926 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 20:06:14,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 20:06:14,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 20:06:14,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 20:06:14,111 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 20:06:14,112 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 20:06:14,113 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound50.c [2022-03-20 20:06:14,150 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38d421138/5955ef9c5dfa42b0a09d1033655dedf9/FLAGffe0bbc75 [2022-03-20 20:06:14,491 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 20:06:14,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound50.c [2022-03-20 20:06:14,496 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38d421138/5955ef9c5dfa42b0a09d1033655dedf9/FLAGffe0bbc75 [2022-03-20 20:06:14,508 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38d421138/5955ef9c5dfa42b0a09d1033655dedf9 [2022-03-20 20:06:14,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 20:06:14,510 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 20:06:14,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 20:06:14,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 20:06:14,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 20:06:14,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:06:14" (1/1) ... [2022-03-20 20:06:14,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1606fbd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:06:14, skipping insertion in model container [2022-03-20 20:06:14,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:06:14" (1/1) ... [2022-03-20 20:06:14,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 20:06:14,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 20:06:14,690 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/cohendiv-ll_valuebound50.c[576,589] [2022-03-20 20:06:14,713 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 20:06:14,720 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 20:06:14,728 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/cohendiv-ll_valuebound50.c[576,589] [2022-03-20 20:06:14,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 20:06:14,754 INFO L208 MainTranslator]: Completed translation [2022-03-20 20:06:14,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:06:14 WrapperNode [2022-03-20 20:06:14,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 20:06:14,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 20:06:14,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 20:06:14,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 20:06:14,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:06:14" (1/1) ... [2022-03-20 20:06:14,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:06:14" (1/1) ... [2022-03-20 20:06:14,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:06:14" (1/1) ... [2022-03-20 20:06:14,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:06:14" (1/1) ... [2022-03-20 20:06:14,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:06:14" (1/1) ... [2022-03-20 20:06:14,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:06:14" (1/1) ... [2022-03-20 20:06:14,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:06:14" (1/1) ... [2022-03-20 20:06:14,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 20:06:14,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 20:06:14,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 20:06:14,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 20:06:14,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:06:14" (1/1) ... [2022-03-20 20:06:14,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 20:06:14,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:06:14,813 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) [2022-03-20 20:06:14,843 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 [2022-03-20 20:06:14,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 20:06:14,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 20:06:14,867 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 20:06:14,867 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 20:06:14,868 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 20:06:14,868 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 20:06:14,868 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 20:06:14,868 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 20:06:14,868 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 20:06:14,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 20:06:14,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 20:06:14,869 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 20:06:14,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 20:06:14,869 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 20:06:14,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 20:06:14,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 20:06:14,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 20:06:14,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 20:06:14,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 20:06:14,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 20:06:14,909 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 20:06:14,910 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 20:06:15,001 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 20:06:15,005 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 20:06:15,006 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 20:06:15,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:06:15 BoogieIcfgContainer [2022-03-20 20:06:15,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 20:06:15,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 20:06:15,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 20:06:15,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 20:06:15,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:06:14" (1/3) ... [2022-03-20 20:06:15,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39f16a04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:06:15, skipping insertion in model container [2022-03-20 20:06:15,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:06:14" (2/3) ... [2022-03-20 20:06:15,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39f16a04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:06:15, skipping insertion in model container [2022-03-20 20:06:15,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:06:15" (3/3) ... [2022-03-20 20:06:15,012 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound50.c [2022-03-20 20:06:15,015 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 20:06:15,015 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 20:06:15,039 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 20:06:15,043 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 [2022-03-20 20:06:15,043 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 20:06:15,051 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 20:06:15,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 20:06:15,056 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:06:15,056 INFO L499 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] [2022-03-20 20:06:15,057 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:06:15,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:06:15,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1768835633, now seen corresponding path program 1 times [2022-03-20 20:06:15,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:06:15,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1500876345] [2022-03-20 20:06:15,086 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:06:15,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1768835633, now seen corresponding path program 2 times [2022-03-20 20:06:15,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:06:15,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414198273] [2022-03-20 20:06:15,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:06:15,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:06:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:06:15,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 20:06:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:06:15,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 20:06:15,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:06:15,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 20:06:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:06:15,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 20:06:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:06:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 20:06:15,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:06:15,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414198273] [2022-03-20 20:06:15,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414198273] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:06:15,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:06:15,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 20:06:15,308 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:06:15,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1500876345] [2022-03-20 20:06:15,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1500876345] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:06:15,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:06:15,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 20:06:15,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460433216] [2022-03-20 20:06:15,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:06:15,311 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 20:06:15,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:06:15,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 20:06:15,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 20:06:15,328 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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) [2022-03-20 20:06:15,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:06:15,384 INFO L93 Difference]: Finished difference Result 71 states and 110 transitions. [2022-03-20 20:06:15,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 20:06:15,386 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 [2022-03-20 20:06:15,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:06:15,390 INFO L225 Difference]: With dead ends: 71 [2022-03-20 20:06:15,391 INFO L226 Difference]: Without dead ends: 34 [2022-03-20 20:06:15,394 INFO L912 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 [2022-03-20 20:06:15,399 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:06:15,401 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:06:15,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-20 20:06:15,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-20 20:06:15,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 20:06:15,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-03-20 20:06:15,440 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 28 [2022-03-20 20:06:15,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:06:15,440 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-03-20 20:06:15,440 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) [2022-03-20 20:06:15,440 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-03-20 20:06:15,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 20:06:15,442 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:06:15,442 INFO L499 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] [2022-03-20 20:06:15,442 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 20:06:15,443 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:06:15,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:06:15,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1378913883, now seen corresponding path program 1 times [2022-03-20 20:06:15,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:06:15,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [828723705] [2022-03-20 20:06:15,448 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:06:15,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1378913883, now seen corresponding path program 2 times [2022-03-20 20:06:15,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:06:15,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907294873] [2022-03-20 20:06:15,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:06:15,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:06:15,474 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:06:15,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030197515] [2022-03-20 20:06:15,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:06:15,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:06:15,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:06:15,486 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) [2022-03-20 20:06:15,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 20:06:15,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 20:06:15,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:06:15,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 20:06:15,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:06:15,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 20:06:15,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:06:15,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:06:15,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907294873] [2022-03-20 20:06:15,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:06:15,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030197515] [2022-03-20 20:06:15,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030197515] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:06:15,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:06:15,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:06:15,675 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:06:15,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [828723705] [2022-03-20 20:06:15,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [828723705] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:06:15,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:06:15,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:06:15,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782162570] [2022-03-20 20:06:15,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:06:15,676 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:06:15,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:06:15,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:06:15,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:06:15,677 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 20:06:15,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:06:15,732 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-03-20 20:06:15,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:06:15,733 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-20 20:06:15,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:06:15,735 INFO L225 Difference]: With dead ends: 45 [2022-03-20 20:06:15,735 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 20:06:15,736 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 20:06:15,737 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:06:15,739 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 153 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:06:15,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 20:06:15,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-03-20 20:06:15,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 20:06:15,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-03-20 20:06:15,752 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 28 [2022-03-20 20:06:15,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:06:15,753 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-03-20 20:06:15,754 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 20:06:15,754 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-03-20 20:06:15,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 20:06:15,755 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:06:15,755 INFO L499 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] [2022-03-20 20:06:15,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 20:06:15,972 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 [2022-03-20 20:06:15,972 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:06:15,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:06:15,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1928335320, now seen corresponding path program 1 times [2022-03-20 20:06:15,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:06:15,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1868243301] [2022-03-20 20:06:15,974 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:06:15,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1928335320, now seen corresponding path program 2 times [2022-03-20 20:06:15,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:06:15,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376117049] [2022-03-20 20:06:15,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:06:15,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:06:15,988 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:06:15,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1022289092] [2022-03-20 20:06:15,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:06:15,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:06:15,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:06:15,998 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) [2022-03-20 20:06:15,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 20:06:16,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:06:16,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:06:16,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 20:06:16,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:06:16,233 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 20:06:16,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:06:16,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:06:16,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376117049] [2022-03-20 20:06:16,234 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:06:16,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022289092] [2022-03-20 20:06:16,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022289092] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:06:16,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:06:16,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 20:06:16,234 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:06:16,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1868243301] [2022-03-20 20:06:16,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1868243301] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:06:16,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:06:16,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 20:06:16,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172380264] [2022-03-20 20:06:16,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:06:16,235 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 20:06:16,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:06:16,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 20:06:16,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:06:16,236 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 20:06:16,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:06:16,323 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-03-20 20:06:16,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 20:06:16,323 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2022-03-20 20:06:16,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:06:16,324 INFO L225 Difference]: With dead ends: 57 [2022-03-20 20:06:16,324 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 20:06:16,325 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-20 20:06:16,325 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 45 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:06:16,326 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 198 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:06:16,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 20:06:16,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-03-20 20:06:16,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 20:06:16,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2022-03-20 20:06:16,335 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 33 [2022-03-20 20:06:16,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:06:16,335 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2022-03-20 20:06:16,335 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 20:06:16,335 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2022-03-20 20:06:16,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 20:06:16,336 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:06:16,336 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:06:16,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 20:06:16,551 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 [2022-03-20 20:06:16,551 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:06:16,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:06:16,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1297647068, now seen corresponding path program 1 times [2022-03-20 20:06:16,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:06:16,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1965235482] [2022-03-20 20:06:16,553 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:06:16,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1297647068, now seen corresponding path program 2 times [2022-03-20 20:06:16,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:06:16,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750341679] [2022-03-20 20:06:16,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:06:16,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:06:16,564 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:06:16,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518322875] [2022-03-20 20:06:16,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:06:16,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:06:16,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:06:16,565 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) [2022-03-20 20:06:16,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 20:06:16,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:06:16,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:06:16,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 20:06:16,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:06:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 20:06:16,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:06:16,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:06:16,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750341679] [2022-03-20 20:06:16,682 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:06:16,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518322875] [2022-03-20 20:06:16,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518322875] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:06:16,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:06:16,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:06:16,683 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:06:16,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1965235482] [2022-03-20 20:06:16,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1965235482] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:06:16,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:06:16,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:06:16,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983845981] [2022-03-20 20:06:16,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:06:16,683 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:06:16,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:06:16,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:06:16,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:06:16,684 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 20:06:16,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:06:16,725 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2022-03-20 20:06:16,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:06:16,726 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2022-03-20 20:06:16,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:06:16,727 INFO L225 Difference]: With dead ends: 79 [2022-03-20 20:06:16,727 INFO L226 Difference]: Without dead ends: 77 [2022-03-20 20:06:16,727 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 20:06:16,728 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 10 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:06:16,728 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 160 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:06:16,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-20 20:06:16,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2022-03-20 20:06:16,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 20:06:16,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2022-03-20 20:06:16,739 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 40 [2022-03-20 20:06:16,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:06:16,739 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2022-03-20 20:06:16,739 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 20:06:16,739 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2022-03-20 20:06:16,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 20:06:16,740 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:06:16,740 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:06:16,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 20:06:16,947 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 [2022-03-20 20:06:16,948 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:06:16,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:06:16,948 INFO L85 PathProgramCache]: Analyzing trace with hash -391974204, now seen corresponding path program 1 times [2022-03-20 20:06:16,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:06:16,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1983219670] [2022-03-20 20:06:16,949 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:06:16,949 INFO L85 PathProgramCache]: Analyzing trace with hash -391974204, now seen corresponding path program 2 times [2022-03-20 20:06:16,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:06:16,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286830543] [2022-03-20 20:06:16,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:06:16,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:06:16,959 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:06:16,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746944023] [2022-03-20 20:06:16,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:06:16,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:06:16,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:06:16,961 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) [2022-03-20 20:06:16,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 20:06:16,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:06:16,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:06:16,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 20:06:17,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:06:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 20:06:17,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:06:17,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:06:17,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286830543] [2022-03-20 20:06:17,120 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:06:17,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746944023] [2022-03-20 20:06:17,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746944023] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:06:17,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:06:17,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:06:17,121 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:06:17,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1983219670] [2022-03-20 20:06:17,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1983219670] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:06:17,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:06:17,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:06:17,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951760958] [2022-03-20 20:06:17,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:06:17,122 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:06:17,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:06:17,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:06:17,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-20 20:06:17,122 INFO L87 Difference]: Start difference. First operand 70 states and 92 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 20:06:17,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:06:17,191 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2022-03-20 20:06:17,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 20:06:17,191 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-03-20 20:06:17,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:06:17,193 INFO L225 Difference]: With dead ends: 76 [2022-03-20 20:06:17,193 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 20:06:17,193 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-20 20:06:17,194 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 16 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:06:17,194 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 197 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:06:17,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 20:06:17,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-03-20 20:06:17,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 41 states have (on average 1.146341463414634) internal successors, (47), 43 states have internal predecessors, (47), 25 states have call successors, (25), 8 states have call predecessors, (25), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 20:06:17,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2022-03-20 20:06:17,203 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 50 [2022-03-20 20:06:17,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:06:17,204 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2022-03-20 20:06:17,204 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 20:06:17,204 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2022-03-20 20:06:17,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 20:06:17,205 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:06:17,205 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:06:17,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 20:06:17,422 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 [2022-03-20 20:06:17,423 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:06:17,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:06:17,423 INFO L85 PathProgramCache]: Analyzing trace with hash 991781023, now seen corresponding path program 1 times [2022-03-20 20:06:17,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:06:17,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [244630954] [2022-03-20 20:06:17,424 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:06:17,424 INFO L85 PathProgramCache]: Analyzing trace with hash 991781023, now seen corresponding path program 2 times [2022-03-20 20:06:17,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:06:17,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793692166] [2022-03-20 20:06:17,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:06:17,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:06:17,432 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:06:17,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500731793] [2022-03-20 20:06:17,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:06:17,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:06:17,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:06:17,433 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:06:17,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 20:06:17,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:06:17,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:06:17,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 20:06:17,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:06:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 20:06:17,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:06:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 20:06:17,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:06:17,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793692166] [2022-03-20 20:06:17,774 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:06:17,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500731793] [2022-03-20 20:06:17,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500731793] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:06:17,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:06:17,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-20 20:06:17,775 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:06:17,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [244630954] [2022-03-20 20:06:17,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [244630954] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:06:17,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:06:17,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:06:17,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588857892] [2022-03-20 20:06:17,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:06:17,775 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:06:17,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:06:17,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:06:17,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-20 20:06:17,776 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 20:06:17,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:06:17,854 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2022-03-20 20:06:17,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 20:06:17,854 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-03-20 20:06:17,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:06:17,855 INFO L225 Difference]: With dead ends: 80 [2022-03-20 20:06:17,855 INFO L226 Difference]: Without dead ends: 78 [2022-03-20 20:06:17,855 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-20 20:06:17,856 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:06:17,856 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 144 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:06:17,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-20 20:06:17,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-03-20 20:06:17,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 20:06:17,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 98 transitions. [2022-03-20 20:06:17,865 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 98 transitions. Word has length 56 [2022-03-20 20:06:17,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:06:17,866 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 98 transitions. [2022-03-20 20:06:17,866 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 20:06:17,866 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 98 transitions. [2022-03-20 20:06:17,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 20:06:17,866 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:06:17,866 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:06:17,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 20:06:18,083 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:06:18,084 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:06:18,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:06:18,084 INFO L85 PathProgramCache]: Analyzing trace with hash -2096667334, now seen corresponding path program 1 times [2022-03-20 20:06:18,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:06:18,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [265058387] [2022-03-20 20:06:18,085 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:06:18,085 INFO L85 PathProgramCache]: Analyzing trace with hash -2096667334, now seen corresponding path program 2 times [2022-03-20 20:06:18,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:06:18,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464831432] [2022-03-20 20:06:18,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:06:18,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:06:18,092 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:06:18,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886143001] [2022-03-20 20:06:18,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:06:18,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:06:18,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:06:18,096 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:06:18,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 20:06:18,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:06:18,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:06:18,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 20:06:18,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:06:18,296 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-20 20:06:18,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:06:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-20 20:06:18,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:06:18,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464831432] [2022-03-20 20:06:18,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:06:18,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886143001] [2022-03-20 20:06:18,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886143001] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:06:18,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:06:18,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-03-20 20:06:18,439 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:06:18,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [265058387] [2022-03-20 20:06:18,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [265058387] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:06:18,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:06:18,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 20:06:18,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285533597] [2022-03-20 20:06:18,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:06:18,440 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 20:06:18,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:06:18,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 20:06:18,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:06:18,440 INFO L87 Difference]: Start difference. First operand 78 states and 98 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 20:06:18,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:06:18,554 INFO L93 Difference]: Finished difference Result 111 states and 142 transitions. [2022-03-20 20:06:18,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 20:06:18,556 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2022-03-20 20:06:18,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:06:18,557 INFO L225 Difference]: With dead ends: 111 [2022-03-20 20:06:18,557 INFO L226 Difference]: Without dead ends: 108 [2022-03-20 20:06:18,557 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 20:06:18,557 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 19 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:06:18,558 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 279 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:06:18,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-20 20:06:18,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2022-03-20 20:06:18,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 60 states have internal predecessors, (66), 34 states have call successors, (34), 11 states have call predecessors, (34), 10 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-20 20:06:18,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 132 transitions. [2022-03-20 20:06:18,581 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 132 transitions. Word has length 63 [2022-03-20 20:06:18,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:06:18,582 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 132 transitions. [2022-03-20 20:06:18,582 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 20:06:18,582 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 132 transitions. [2022-03-20 20:06:18,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 20:06:18,583 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:06:18,583 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:06:18,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 20:06:18,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:06:18,784 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:06:18,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:06:18,784 INFO L85 PathProgramCache]: Analyzing trace with hash -2105983492, now seen corresponding path program 1 times [2022-03-20 20:06:18,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:06:18,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [246493057] [2022-03-20 20:06:18,785 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:06:18,785 INFO L85 PathProgramCache]: Analyzing trace with hash -2105983492, now seen corresponding path program 2 times [2022-03-20 20:06:18,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:06:18,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931705443] [2022-03-20 20:06:18,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:06:18,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:06:18,793 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:06:18,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766389620] [2022-03-20 20:06:18,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:06:18,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:06:18,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:06:18,800 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:06:18,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 20:06:18,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:06:18,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:06:18,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 20:06:18,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:06:19,225 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 54 proven. 22 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 20:06:19,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:06:19,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:06:19,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931705443] [2022-03-20 20:06:19,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:06:19,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766389620] [2022-03-20 20:06:19,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766389620] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:06:19,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:06:19,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-20 20:06:19,568 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:06:19,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [246493057] [2022-03-20 20:06:19,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [246493057] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:06:19,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:06:19,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 20:06:19,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529794091] [2022-03-20 20:06:19,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:06:19,569 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 20:06:19,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:06:19,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 20:06:19,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2022-03-20 20:06:19,569 INFO L87 Difference]: Start difference. First operand 103 states and 132 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 20:06:19,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:06:19,813 INFO L93 Difference]: Finished difference Result 147 states and 191 transitions. [2022-03-20 20:06:19,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 20:06:19,814 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 86 [2022-03-20 20:06:19,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:06:19,815 INFO L225 Difference]: With dead ends: 147 [2022-03-20 20:06:19,815 INFO L226 Difference]: Without dead ends: 144 [2022-03-20 20:06:19,815 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-03-20 20:06:19,816 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 29 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:06:19,816 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 295 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:06:19,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-20 20:06:19,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 121. [2022-03-20 20:06:19,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 72 states have internal predecessors, (78), 39 states have call successors, (39), 13 states have call predecessors, (39), 12 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 20:06:19,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 154 transitions. [2022-03-20 20:06:19,832 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 154 transitions. Word has length 86 [2022-03-20 20:06:19,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:06:19,832 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 154 transitions. [2022-03-20 20:06:19,832 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 20:06:19,832 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 154 transitions. [2022-03-20 20:06:19,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 20:06:19,833 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:06:19,833 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:06:19,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 20:06:20,050 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:06:20,050 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:06:20,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:06:20,051 INFO L85 PathProgramCache]: Analyzing trace with hash -895340852, now seen corresponding path program 3 times [2022-03-20 20:06:20,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:06:20,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [963887117] [2022-03-20 20:06:20,051 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:06:20,051 INFO L85 PathProgramCache]: Analyzing trace with hash -895340852, now seen corresponding path program 4 times [2022-03-20 20:06:20,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:06:20,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084623077] [2022-03-20 20:06:20,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:06:20,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:06:20,060 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:06:20,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2032010860] [2022-03-20 20:06:20,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:06:20,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:06:20,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:06:20,061 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:06:20,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 20:06:20,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:06:20,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:06:20,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 20:06:20,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:06:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-03-20 20:06:20,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:06:20,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:06:20,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084623077] [2022-03-20 20:06:20,221 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:06:20,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032010860] [2022-03-20 20:06:20,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032010860] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:06:20,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:06:20,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:06:20,222 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:06:20,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [963887117] [2022-03-20 20:06:20,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [963887117] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:06:20,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:06:20,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:06:20,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794426799] [2022-03-20 20:06:20,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:06:20,222 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:06:20,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:06:20,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:06:20,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:06:20,223 INFO L87 Difference]: Start difference. First operand 121 states and 154 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 20:06:20,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:06:20,263 INFO L93 Difference]: Finished difference Result 185 states and 240 transitions. [2022-03-20 20:06:20,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 20:06:20,263 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 93 [2022-03-20 20:06:20,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:06:20,264 INFO L225 Difference]: With dead ends: 185 [2022-03-20 20:06:20,264 INFO L226 Difference]: Without dead ends: 125 [2022-03-20 20:06:20,265 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 20:06:20,265 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 4 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:06:20,265 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 161 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:06:20,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-20 20:06:20,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 120. [2022-03-20 20:06:20,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 69 states have internal predecessors, (76), 39 states have call successors, (39), 13 states have call predecessors, (39), 12 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 20:06:20,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 152 transitions. [2022-03-20 20:06:20,277 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 152 transitions. Word has length 93 [2022-03-20 20:06:20,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:06:20,277 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 152 transitions. [2022-03-20 20:06:20,277 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 20:06:20,277 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 152 transitions. [2022-03-20 20:06:20,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-20 20:06:20,278 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:06:20,278 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:06:20,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 20:06:20,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 20:06:20,496 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:06:20,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:06:20,496 INFO L85 PathProgramCache]: Analyzing trace with hash -39671046, now seen corresponding path program 3 times [2022-03-20 20:06:20,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:06:20,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [442782361] [2022-03-20 20:06:20,496 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:06:20,497 INFO L85 PathProgramCache]: Analyzing trace with hash -39671046, now seen corresponding path program 4 times [2022-03-20 20:06:20,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:06:20,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518057592] [2022-03-20 20:06:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:06:20,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:06:20,505 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:06:20,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116556986] [2022-03-20 20:06:20,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:06:20,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:06:20,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:06:20,506 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:06:20,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 20:06:20,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:06:20,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:06:20,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 20:06:20,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:06:21,248 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 45 proven. 42 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-03-20 20:06:21,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:06:21,837 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:06:21,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:06:21,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518057592] [2022-03-20 20:06:21,929 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:06:21,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116556986] [2022-03-20 20:06:21,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116556986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:06:21,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:06:21,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-20 20:06:21,929 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:06:21,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [442782361] [2022-03-20 20:06:21,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [442782361] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:06:21,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:06:21,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 20:06:21,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855226903] [2022-03-20 20:06:21,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:06:21,930 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 20:06:21,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:06:21,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 20:06:21,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-03-20 20:06:21,930 INFO L87 Difference]: Start difference. First operand 120 states and 152 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-20 20:06:22,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:06:22,741 INFO L93 Difference]: Finished difference Result 164 states and 211 transitions. [2022-03-20 20:06:22,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 20:06:22,741 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 109 [2022-03-20 20:06:22,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:06:22,742 INFO L225 Difference]: With dead ends: 164 [2022-03-20 20:06:22,742 INFO L226 Difference]: Without dead ends: 161 [2022-03-20 20:06:22,743 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-03-20 20:06:22,743 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 29 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 20:06:22,743 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 458 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 20:06:22,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-20 20:06:22,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 156. [2022-03-20 20:06:22,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 88 states have (on average 1.125) internal successors, (99), 89 states have internal predecessors, (99), 52 states have call successors, (52), 16 states have call predecessors, (52), 15 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-03-20 20:06:22,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 201 transitions. [2022-03-20 20:06:22,758 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 201 transitions. Word has length 109 [2022-03-20 20:06:22,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:06:22,759 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 201 transitions. [2022-03-20 20:06:22,759 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-20 20:06:22,759 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 201 transitions. [2022-03-20 20:06:22,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 20:06:22,760 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:06:22,760 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:06:22,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 20:06:22,974 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 20:06:22,974 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:06:22,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:06:22,974 INFO L85 PathProgramCache]: Analyzing trace with hash 800180238, now seen corresponding path program 5 times [2022-03-20 20:06:22,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:06:22,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2140313080] [2022-03-20 20:06:22,975 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:06:22,975 INFO L85 PathProgramCache]: Analyzing trace with hash 800180238, now seen corresponding path program 6 times [2022-03-20 20:06:22,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:06:22,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242306804] [2022-03-20 20:06:22,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:06:22,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:06:22,983 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:06:22,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268683126] [2022-03-20 20:06:22,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:06:22,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:06:22,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:06:22,984 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:06:23,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 20:06:23,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 20:06:23,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:06:23,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 20:06:23,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:06:23,200 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 114 proven. 5 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2022-03-20 20:06:23,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:06:23,463 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 114 proven. 5 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2022-03-20 20:06:23,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:06:23,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242306804] [2022-03-20 20:06:23,464 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:06:23,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268683126] [2022-03-20 20:06:23,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268683126] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:06:23,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:06:23,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-20 20:06:23,464 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:06:23,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2140313080] [2022-03-20 20:06:23,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2140313080] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:06:23,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:06:23,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:06:23,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387145159] [2022-03-20 20:06:23,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:06:23,465 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:06:23,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:06:23,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:06:23,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-20 20:06:23,466 INFO L87 Difference]: Start difference. First operand 156 states and 201 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-20 20:06:23,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:06:23,604 INFO L93 Difference]: Finished difference Result 164 states and 207 transitions. [2022-03-20 20:06:23,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 20:06:23,604 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 116 [2022-03-20 20:06:23,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:06:23,605 INFO L225 Difference]: With dead ends: 164 [2022-03-20 20:06:23,605 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 20:06:23,605 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 221 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-20 20:06:23,606 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 18 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:06:23,606 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 137 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:06:23,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 20:06:23,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 20:06:23,606 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) [2022-03-20 20:06:23,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 20:06:23,607 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 116 [2022-03-20 20:06:23,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:06:23,607 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 20:06:23,607 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-20 20:06:23,607 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 20:06:23,607 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 20:06:23,609 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 20:06:23,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 20:06:23,825 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 20:06:23,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 20:06:26,294 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-03-20 20:06:26,294 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-03-20 20:06:26,294 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-03-20 20:06:26,295 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-03-20 20:06:26,295 INFO L878 garLoopResultBuilder]: At program point L12(line 12) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-03-20 20:06:26,295 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-20 20:06:26,295 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-20 20:06:26,295 INFO L885 garLoopResultBuilder]: At program point L64(line 64) the Hoare annotation is: true [2022-03-20 20:06:26,295 INFO L878 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (and (<= 1 main_~y~0) (<= main_~y~0 50)) [2022-03-20 20:06:26,295 INFO L885 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: true [2022-03-20 20:06:26,295 INFO L878 garLoopResultBuilder]: At program point L29-1(line 29) the Hoare annotation is: (and (<= 0 main_~y~0) (<= main_~y~0 50)) [2022-03-20 20:06:26,295 INFO L885 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: true [2022-03-20 20:06:26,295 INFO L885 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: true [2022-03-20 20:06:26,295 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 22 66) the Hoare annotation is: true [2022-03-20 20:06:26,295 INFO L878 garLoopResultBuilder]: At program point L50(lines 47 59) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 50))) [2022-03-20 20:06:26,295 INFO L878 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 50))) [2022-03-20 20:06:26,295 INFO L878 garLoopResultBuilder]: At program point L48-1(line 48) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 50))) [2022-03-20 20:06:26,296 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 22 66) the Hoare annotation is: true [2022-03-20 20:06:26,296 INFO L878 garLoopResultBuilder]: At program point L40(lines 38 62) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 50))) [2022-03-20 20:06:26,296 INFO L878 garLoopResultBuilder]: At program point L38-2(lines 38 62) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 50))) [2022-03-20 20:06:26,296 INFO L878 garLoopResultBuilder]: At program point L38-3(lines 38 62) the Hoare annotation is: (let ((.cse3 (* main_~a~0 main_~y~0))) (let ((.cse0 (<= 1 main_~y~0)) (.cse1 (= main_~b~0 .cse3)) (.cse2 (<= main_~y~0 50))) (or (and (= main_~x~0 (+ main_~y~0 main_~r~0)) (= main_~q~0 1) .cse0 .cse1 .cse2) (and (= main_~x~0 main_~r~0) (= main_~q~0 0) .cse0 .cse2) (and (< main_~r~0 main_~y~0) (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse3)) .cse0 .cse1 .cse2) (and (< main_~x~0 (* main_~b~0 2)) (= main_~x~0 (+ main_~b~0 main_~r~0)) (= main_~a~0 main_~q~0) (= main_~a~0 2) .cse0 .cse1 .cse2)))) [2022-03-20 20:06:26,296 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 66) the Hoare annotation is: true [2022-03-20 20:06:26,296 INFO L878 garLoopResultBuilder]: At program point L55(line 55) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= (* 2 .cse0) main_~r~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 50))) [2022-03-20 20:06:26,296 INFO L878 garLoopResultBuilder]: At program point L55-1(line 55) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= (* 2 .cse0) main_~r~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 50))) [2022-03-20 20:06:26,296 INFO L878 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 50))) [2022-03-20 20:06:26,296 INFO L878 garLoopResultBuilder]: At program point L47-2(lines 47 59) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 50))) [2022-03-20 20:06:26,296 INFO L878 garLoopResultBuilder]: At program point L47-3(lines 47 59) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 50))) [2022-03-20 20:06:26,296 INFO L878 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 50))) [2022-03-20 20:06:26,296 INFO L878 garLoopResultBuilder]: At program point L39-1(line 39) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 50))) [2022-03-20 20:06:26,296 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-20 20:06:26,296 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|)) [2022-03-20 20:06:26,296 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-20 20:06:26,297 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-20 20:06:26,297 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 20:06:26,297 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 20:06:26,297 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-20 20:06:26,297 INFO L878 garLoopResultBuilder]: At program point L16(lines 16 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-20 20:06:26,297 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 18) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 20:06:26,297 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-03-20 20:06:26,297 INFO L878 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 20:06:26,297 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 20:06:26,297 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-20 20:06:26,299 INFO L719 BasicCegarLoop]: Path program histogram: [6, 4, 2, 2, 2, 2, 2, 2] [2022-03-20 20:06:26,300 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 20:06:26,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:06:26 BoogieIcfgContainer [2022-03-20 20:06:26,310 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 20:06:26,311 INFO L158 Benchmark]: Toolchain (without parser) took 11800.72ms. Allocated memory was 223.3MB in the beginning and 350.2MB in the end (delta: 126.9MB). Free memory was 169.4MB in the beginning and 276.5MB in the end (delta: -107.1MB). Peak memory consumption was 177.9MB. Max. memory is 8.0GB. [2022-03-20 20:06:26,311 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 223.3MB. Free memory is still 185.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 20:06:26,311 INFO L158 Benchmark]: CACSL2BoogieTranslator took 242.84ms. Allocated memory is still 223.3MB. Free memory was 169.3MB in the beginning and 196.9MB in the end (delta: -27.6MB). Peak memory consumption was 6.8MB. Max. memory is 8.0GB. [2022-03-20 20:06:26,311 INFO L158 Benchmark]: Boogie Preprocessor took 26.40ms. Allocated memory is still 223.3MB. Free memory was 196.9MB in the beginning and 195.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 20:06:26,311 INFO L158 Benchmark]: RCFGBuilder took 225.23ms. Allocated memory is still 223.3MB. Free memory was 195.4MB in the beginning and 184.6MB in the end (delta: 10.8MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-20 20:06:26,312 INFO L158 Benchmark]: TraceAbstraction took 11302.31ms. Allocated memory was 223.3MB in the beginning and 350.2MB in the end (delta: 126.9MB). Free memory was 184.1MB in the beginning and 276.5MB in the end (delta: -92.5MB). Peak memory consumption was 194.2MB. Max. memory is 8.0GB. [2022-03-20 20:06:26,313 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 223.3MB. Free memory is still 185.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 242.84ms. Allocated memory is still 223.3MB. Free memory was 169.3MB in the beginning and 196.9MB in the end (delta: -27.6MB). Peak memory consumption was 6.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.40ms. Allocated memory is still 223.3MB. Free memory was 196.9MB in the beginning and 195.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 225.23ms. Allocated memory is still 223.3MB. Free memory was 195.4MB in the beginning and 184.6MB in the end (delta: 10.8MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 11302.31ms. Allocated memory was 223.3MB in the beginning and 350.2MB in the end (delta: 126.9MB). Free memory was 184.1MB in the beginning and 276.5MB in the end (delta: -92.5MB). Peak memory consumption was 194.2MB. 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: 17]: 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, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11.3s, OverallIterations: 11, TraceHistogramMax: 16, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 281 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 215 mSDsluCounter, 2223 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1770 mSDsCounter, 156 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1509 IncrementalHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 156 mSolverCounterUnsat, 453 mSDtfsCounter, 1509 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1062 GetRequests, 949 SyntacticMatches, 9 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=156occurred in iteration=10, InterpolantAutomatonStates: 85, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 49 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 39 LocationsWithAnnotation, 517 PreInvPairs, 756 NumberOfFragments, 502 HoareAnnotationTreeSize, 517 FomulaSimplifications, 426 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 39 FomulaSimplificationsInter, 10177 FormulaSimplificationTreeSizeReductionInter, 2.3s 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: 47]: Loop Invariant Derived loop invariant: (((q * y + b + r == x + a * y && 1 <= r) && 1 <= y) && b == a * y) && y <= 50 - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: ((q * y + b + r == x + a * y && 1 <= y) && b == a * y) && y <= 50 - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == cond || !(1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2022-03-20 20:06:26,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...